54 files changed, 9620 insertions, 4603 deletions

diff --git a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeModule.xtendbin b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeModule.xtendbin
index a3b7b1f2..b3013cf6 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeModule.xtendbin
+++ b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeModule.xtendbin
diff --git a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeSetup.xtendbin b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeSetup.xtendbin
index 6d50bd9d..56db384c 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeSetup.xtendbin
+++ b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/.ApplicationConfigurationIdeSetup.xtendbin
diff --git a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeModule.java b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeModule.java
index 34f65780..f4d40594 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeModule.java
+++ b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeModule.java
@@ -1,13 +1,13 @@
-/**

- * generated by Xtext 2.12.0

- */

-package hu.bme.mit.inf.dslreasoner.application.ide;

-

-import hu.bme.mit.inf.dslreasoner.application.ide.AbstractApplicationConfigurationIdeModule;

-

-/**

- * Use this class to register ide components.

- */

-@SuppressWarnings("all")

-public class ApplicationConfigurationIdeModule extends AbstractApplicationConfigurationIdeModule {

-}

+/**
+ * generated by Xtext 2.12.0
+ */
+package hu.bme.mit.inf.dslreasoner.application.ide;
+
+import hu.bme.mit.inf.dslreasoner.application.ide.AbstractApplicationConfigurationIdeModule;
+
+/**
+ * Use this class to register ide components.
+ */
+@SuppressWarnings("all")
+public class ApplicationConfigurationIdeModule extends AbstractApplicationConfigurationIdeModule {
+}
diff --git a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeSetup.java b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeSetup.java
index a73d3f1f..2281147c 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeSetup.java
+++ b/Application/hu.bme.mit.inf.dslreasoner.application.ide/xtend-gen/hu/bme/mit/inf/dslreasoner/application/ide/ApplicationConfigurationIdeSetup.java
@@ -1,24 +1,24 @@
-/**

- * generated by Xtext 2.12.0

- */

-package hu.bme.mit.inf.dslreasoner.application.ide;

-

-import com.google.inject.Guice;

-import com.google.inject.Injector;

-import hu.bme.mit.inf.dslreasoner.application.ApplicationConfigurationRuntimeModule;

-import hu.bme.mit.inf.dslreasoner.application.ApplicationConfigurationStandaloneSetup;

-import hu.bme.mit.inf.dslreasoner.application.ide.ApplicationConfigurationIdeModule;

-import org.eclipse.xtext.util.Modules2;

-

-/**

- * Initialization support for running Xtext languages as language servers.

- */

-@SuppressWarnings("all")

-public class ApplicationConfigurationIdeSetup extends ApplicationConfigurationStandaloneSetup {

-  @Override

-  public Injector createInjector() {

-    ApplicationConfigurationRuntimeModule _applicationConfigurationRuntimeModule = new ApplicationConfigurationRuntimeModule();

-    ApplicationConfigurationIdeModule _applicationConfigurationIdeModule = new ApplicationConfigurationIdeModule();

-    return Guice.createInjector(Modules2.mixin(_applicationConfigurationRuntimeModule, _applicationConfigurationIdeModule));

-  }

-}

+/**
+ * generated by Xtext 2.12.0
+ */
+package hu.bme.mit.inf.dslreasoner.application.ide;
+
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import hu.bme.mit.inf.dslreasoner.application.ApplicationConfigurationRuntimeModule;
+import hu.bme.mit.inf.dslreasoner.application.ApplicationConfigurationStandaloneSetup;
+import hu.bme.mit.inf.dslreasoner.application.ide.ApplicationConfigurationIdeModule;
+import org.eclipse.xtext.util.Modules2;
+
+/**
+ * Initialization support for running Xtext languages as language servers.
+ */
+@SuppressWarnings("all")
+public class ApplicationConfigurationIdeSetup extends ApplicationConfigurationStandaloneSetup {
+  @Override
+  public Injector createInjector() {
+    ApplicationConfigurationRuntimeModule _applicationConfigurationRuntimeModule = new ApplicationConfigurationRuntimeModule();
+    ApplicationConfigurationIdeModule _applicationConfigurationIdeModule = new ApplicationConfigurationIdeModule();
+    return Guice.createInjector(Modules2.mixin(_applicationConfigurationRuntimeModule, _applicationConfigurationIdeModule));
+  }
+}
diff --git a/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/MetamodelValidator.java b/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/MetamodelValidator.java
index 2a2e1047..872814b8 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/MetamodelValidator.java
+++ b/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/MetamodelValidator.java
@@ -1,157 +1,157 @@
-package hu.bme.mit.inf.dslreasoner.application.validation;

-

-import hu.bme.mit.inf.dslreasoner.ecore2logic.EcoreMetamodelDescriptor;

-import java.util.Collections;

-import java.util.LinkedList;

-import java.util.List;

-import org.eclipse.emf.common.util.EList;

-import org.eclipse.emf.ecore.EAttribute;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.emf.ecore.EDataType;

-import org.eclipse.emf.ecore.EEnum;

-import org.eclipse.emf.ecore.EEnumLiteral;

-import org.eclipse.emf.ecore.EReference;

-import org.eclipse.emf.ecore.EcorePackage;

-import org.eclipse.xtend2.lib.StringConcatenation;

-import org.eclipse.xtext.xbase.lib.CollectionLiterals;

-import org.eclipse.xtext.xbase.lib.Extension;

-

-@SuppressWarnings("all")

-public class MetamodelValidator {

-  public LinkedList<String> validateMetamodel(final EcoreMetamodelDescriptor descriptor) {

-    final LinkedList<String> errors = new LinkedList<String>();

-    this.allSupertypesAreIncluded(descriptor.getClasses(), errors);

-    this.allEnumTypesareIncluded(descriptor.getEnums(), descriptor.getLiterals(), errors);

-    this.referenceEndpointsAreIncluded(descriptor.getClasses(), descriptor.getReferences(), errors);

-    this.attributeSourcePontIsIncluded(descriptor.getClasses(), descriptor.getAttributes(), errors);

-    this.attributeTargetIsSupported(descriptor.getAttributes(), errors);

-    return errors;

-  }

-  

-  private boolean supportedEDataType(final EDataType dataType) {

-    @Extension

-    final EcorePackage l = EcorePackage.eINSTANCE;

-    EDataType _eInt = l.getEInt();

-    EDataType _eBoolean = l.getEBoolean();

-    EDataType _eString = l.getEString();

-    EDataType _eDouble = l.getEDouble();

-    EDataType _eFloat = l.getEFloat();

-    return Collections.<EDataType>unmodifiableList(CollectionLiterals.<EDataType>newArrayList(_eInt, _eBoolean, _eString, _eDouble, _eFloat)).contains(dataType);

-  }

-  

-  public void allSupertypesAreIncluded(final List<EClass> classes, final List<String> errors) {

-    for (final EClass c : classes) {

-      EList<EClass> _eSuperTypes = c.getESuperTypes();

-      for (final EClass s : _eSuperTypes) {

-        boolean _contains = classes.contains(s);

-        boolean _not = (!_contains);

-        if (_not) {

-          StringConcatenation _builder = new StringConcatenation();

-          _builder.append("Metamodel contains \"");

-          String _name = c.getName();

-          _builder.append(_name);

-          _builder.append("\" but not contains its supertype \"");

-          String _name_1 = s.getName();

-          _builder.append(_name_1);

-          _builder.append("\"!");

-          errors.add(_builder.toString());

-        }

-      }

-    }

-  }

-  

-  public void allEnumTypesareIncluded(final List<EEnum> enums, final List<EEnumLiteral> literals, final List<String> errors) {

-    for (final EEnumLiteral l : literals) {

-      boolean _contains = enums.contains(l.getEEnum());

-      boolean _not = (!_contains);

-      if (_not) {

-        StringConcatenation _builder = new StringConcatenation();

-        _builder.append("Metamodel contains literal \"");

-        String _name = l.getName();

-        _builder.append(_name);

-        _builder.append("\" but does not contains enum \"");

-        String _name_1 = l.getEEnum().getName();

-        _builder.append(_name_1);

-        _builder.append("\"!");

-        errors.add(_builder.toString());

-      }

-    }

-  }

-  

-  public void referenceEndpointsAreIncluded(final List<EClass> classes, final List<EReference> references, final List<String> errors) {

-    for (final EReference reference : references) {

-      {

-        final EClass src = reference.getEContainingClass();

-        boolean _contains = classes.contains(src);

-        boolean _not = (!_contains);

-        if (_not) {

-          StringConcatenation _builder = new StringConcatenation();

-          _builder.append("Metamodel contains reference \"");

-          String _name = reference.getName();

-          _builder.append(_name);

-          _builder.append("\" but does not contains its source type \"");

-          String _name_1 = src.getName();

-          _builder.append(_name_1);

-          _builder.append("\"!");

-          errors.add(_builder.toString());

-        }

-        final EClass trg = reference.getEReferenceType();

-        boolean _contains_1 = classes.contains(trg);

-        boolean _not_1 = (!_contains_1);

-        if (_not_1) {

-          StringConcatenation _builder_1 = new StringConcatenation();

-          _builder_1.append("Metamodel contains reference \"");

-          String _name_2 = reference.getName();

-          _builder_1.append(_name_2);

-          _builder_1.append("\" but does not contains its target type \"");

-          String _name_3 = trg.getName();

-          _builder_1.append(_name_3);

-          _builder_1.append("\"!");

-          errors.add(_builder_1.toString());

-        }

-      }

-    }

-  }

-  

-  public void attributeSourcePontIsIncluded(final List<EClass> classes, final List<EAttribute> attributes, final List<String> errors) {

-    for (final EAttribute attribute : attributes) {

-      {

-        final Class<?> src = attribute.getContainerClass();

-        boolean _contains = classes.contains(src);

-        boolean _not = (!_contains);

-        if (_not) {

-          StringConcatenation _builder = new StringConcatenation();

-          _builder.append("Metamodel contains attribute \"");

-          String _name = attribute.getName();

-          _builder.append(_name);

-          _builder.append("\" but does not contains its source type \"");

-          String _name_1 = src.getName();

-          _builder.append(_name_1);

-          _builder.append("\"!");

-          errors.add(_builder.toString());

-        }

-      }

-    }

-  }

-  

-  public void attributeTargetIsSupported(final List<EAttribute> attributes, final List<String> errors) {

-    for (final EAttribute attribute : attributes) {

-      {

-        final EDataType trg = attribute.getEAttributeType();

-        boolean _supportedEDataType = this.supportedEDataType(trg);

-        boolean _not = (!_supportedEDataType);

-        if (_not) {

-          StringConcatenation _builder = new StringConcatenation();

-          _builder.append("Metamodels contains attribute \"");

-          String _name = attribute.getName();

-          _builder.append(_name);

-          _builder.append("\" with unsupported type \"");

-          String _name_1 = trg.getName();

-          _builder.append(_name_1);

-          _builder.append("\"!");

-          errors.add(_builder.toString());

-        }

-      }

-    }

-  }

-}

+package hu.bme.mit.inf.dslreasoner.application.validation;
+
+import hu.bme.mit.inf.dslreasoner.ecore2logic.EcoreMetamodelDescriptor;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EAttribute;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EDataType;
+import org.eclipse.emf.ecore.EEnum;
+import org.eclipse.emf.ecore.EEnumLiteral;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.emf.ecore.EcorePackage;
+import org.eclipse.xtend2.lib.StringConcatenation;
+import org.eclipse.xtext.xbase.lib.CollectionLiterals;
+import org.eclipse.xtext.xbase.lib.Extension;
+
+@SuppressWarnings("all")
+public class MetamodelValidator {
+  public LinkedList<String> validateMetamodel(final EcoreMetamodelDescriptor descriptor) {
+    final LinkedList<String> errors = new LinkedList<String>();
+    this.allSupertypesAreIncluded(descriptor.getClasses(), errors);
+    this.allEnumTypesareIncluded(descriptor.getEnums(), descriptor.getLiterals(), errors);
+    this.referenceEndpointsAreIncluded(descriptor.getClasses(), descriptor.getReferences(), errors);
+    this.attributeSourcePontIsIncluded(descriptor.getClasses(), descriptor.getAttributes(), errors);
+    this.attributeTargetIsSupported(descriptor.getAttributes(), errors);
+    return errors;
+  }
+  
+  private boolean supportedEDataType(final EDataType dataType) {
+    @Extension
+    final EcorePackage l = EcorePackage.eINSTANCE;
+    EDataType _eInt = l.getEInt();
+    EDataType _eBoolean = l.getEBoolean();
+    EDataType _eString = l.getEString();
+    EDataType _eDouble = l.getEDouble();
+    EDataType _eFloat = l.getEFloat();
+    return Collections.<EDataType>unmodifiableList(CollectionLiterals.<EDataType>newArrayList(_eInt, _eBoolean, _eString, _eDouble, _eFloat)).contains(dataType);
+  }
+  
+  public void allSupertypesAreIncluded(final List<EClass> classes, final List<String> errors) {
+    for (final EClass c : classes) {
+      EList<EClass> _eSuperTypes = c.getESuperTypes();
+      for (final EClass s : _eSuperTypes) {
+        boolean _contains = classes.contains(s);
+        boolean _not = (!_contains);
+        if (_not) {
+          StringConcatenation _builder = new StringConcatenation();
+          _builder.append("Metamodel contains \"");
+          String _name = c.getName();
+          _builder.append(_name);
+          _builder.append("\" but not contains its supertype \"");
+          String _name_1 = s.getName();
+          _builder.append(_name_1);
+          _builder.append("\"!");
+          errors.add(_builder.toString());
+        }
+      }
+    }
+  }
+  
+  public void allEnumTypesareIncluded(final List<EEnum> enums, final List<EEnumLiteral> literals, final List<String> errors) {
+    for (final EEnumLiteral l : literals) {
+      boolean _contains = enums.contains(l.getEEnum());
+      boolean _not = (!_contains);
+      if (_not) {
+        StringConcatenation _builder = new StringConcatenation();
+        _builder.append("Metamodel contains literal \"");
+        String _name = l.getName();
+        _builder.append(_name);
+        _builder.append("\" but does not contains enum \"");
+        String _name_1 = l.getEEnum().getName();
+        _builder.append(_name_1);
+        _builder.append("\"!");
+        errors.add(_builder.toString());
+      }
+    }
+  }
+  
+  public void referenceEndpointsAreIncluded(final List<EClass> classes, final List<EReference> references, final List<String> errors) {
+    for (final EReference reference : references) {
+      {
+        final EClass src = reference.getEContainingClass();
+        boolean _contains = classes.contains(src);
+        boolean _not = (!_contains);
+        if (_not) {
+          StringConcatenation _builder = new StringConcatenation();
+          _builder.append("Metamodel contains reference \"");
+          String _name = reference.getName();
+          _builder.append(_name);
+          _builder.append("\" but does not contains its source type \"");
+          String _name_1 = src.getName();
+          _builder.append(_name_1);
+          _builder.append("\"!");
+          errors.add(_builder.toString());
+        }
+        final EClass trg = reference.getEReferenceType();
+        boolean _contains_1 = classes.contains(trg);
+        boolean _not_1 = (!_contains_1);
+        if (_not_1) {
+          StringConcatenation _builder_1 = new StringConcatenation();
+          _builder_1.append("Metamodel contains reference \"");
+          String _name_2 = reference.getName();
+          _builder_1.append(_name_2);
+          _builder_1.append("\" but does not contains its target type \"");
+          String _name_3 = trg.getName();
+          _builder_1.append(_name_3);
+          _builder_1.append("\"!");
+          errors.add(_builder_1.toString());
+        }
+      }
+    }
+  }
+  
+  public void attributeSourcePontIsIncluded(final List<EClass> classes, final List<EAttribute> attributes, final List<String> errors) {
+    for (final EAttribute attribute : attributes) {
+      {
+        final Class<?> src = attribute.getContainerClass();
+        boolean _contains = classes.contains(src);
+        boolean _not = (!_contains);
+        if (_not) {
+          StringConcatenation _builder = new StringConcatenation();
+          _builder.append("Metamodel contains attribute \"");
+          String _name = attribute.getName();
+          _builder.append(_name);
+          _builder.append("\" but does not contains its source type \"");
+          String _name_1 = src.getName();
+          _builder.append(_name_1);
+          _builder.append("\"!");
+          errors.add(_builder.toString());
+        }
+      }
+    }
+  }
+  
+  public void attributeTargetIsSupported(final List<EAttribute> attributes, final List<String> errors) {
+    for (final EAttribute attribute : attributes) {
+      {
+        final EDataType trg = attribute.getEAttributeType();
+        boolean _supportedEDataType = this.supportedEDataType(trg);
+        boolean _not = (!_supportedEDataType);
+        if (_not) {
+          StringConcatenation _builder = new StringConcatenation();
+          _builder.append("Metamodels contains attribute \"");
+          String _name = attribute.getName();
+          _builder.append(_name);
+          _builder.append("\" with unsupported type \"");
+          String _name_1 = trg.getName();
+          _builder.append(_name_1);
+          _builder.append("\"!");
+          errors.add(_builder.toString());
+        }
+      }
+    }
+  }
+}
diff --git a/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/QueryAndMetamodelValidator.java b/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/QueryAndMetamodelValidator.java
index 567551f1..0b5b8f03 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/QueryAndMetamodelValidator.java
+++ b/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/validation/QueryAndMetamodelValidator.java
@@ -1,86 +1,86 @@
-package hu.bme.mit.inf.dslreasoner.application.validation;

-

-import com.google.common.collect.Iterables;

-import hu.bme.mit.inf.dslreasoner.ecore2logic.EcoreMetamodelDescriptor;

-import hu.bme.mit.inf.dslreasoner.viatra2logic.ViatraQuerySetDescriptor;

-import java.util.Collections;

-import java.util.LinkedList;

-import java.util.List;

-import java.util.Set;

-import org.eclipse.emf.common.util.EList;

-import org.eclipse.emf.ecore.EAttribute;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.emf.ecore.EClassifier;

-import org.eclipse.emf.ecore.EEnum;

-import org.eclipse.emf.ecore.EEnumLiteral;

-import org.eclipse.emf.ecore.ENamedElement;

-import org.eclipse.emf.ecore.EObject;

-import org.eclipse.emf.ecore.EReference;

-import org.eclipse.viatra.query.patternlanguage.emf.vql.Pattern;

-import org.eclipse.xtend2.lib.StringConcatenation;

-import org.eclipse.xtext.xbase.lib.CollectionLiterals;

-import org.eclipse.xtext.xbase.lib.Functions.Function1;

-import org.eclipse.xtext.xbase.lib.IterableExtensions;

-import org.eclipse.xtext.xbase.lib.IteratorExtensions;

-import org.eclipse.xtext.xbase.lib.ListExtensions;

-import org.eclipse.xtext.xbase.lib.Pair;

-

-@SuppressWarnings("all")

-public class QueryAndMetamodelValidator {

-  public LinkedList<String> validateQueryAndMetamodel(final EcoreMetamodelDescriptor metamodel, final Pair<ViatraQuerySetDescriptor, Set<Pattern>> viatra) {

-    final Set<Pattern> patterns = viatra.getValue();

-    List<EClass> _classes = metamodel.getClasses();

-    List<EEnum> _enums = metamodel.getEnums();

-    Iterable<EClassifier> _plus = Iterables.<EClassifier>concat(_classes, _enums);

-    List<EEnumLiteral> _literals = metamodel.getLiterals();

-    Iterable<ENamedElement> _plus_1 = Iterables.<ENamedElement>concat(_plus, _literals);

-    List<EAttribute> _attributes = metamodel.getAttributes();

-    Iterable<ENamedElement> _plus_2 = Iterables.<ENamedElement>concat(_plus_1, _attributes);

-    List<EReference> _references = metamodel.getReferences();

-    final Set<ENamedElement> elementsInMetamodel = IterableExtensions.<ENamedElement>toSet(Iterables.<ENamedElement>concat(_plus_2, _references));

-    final LinkedList<String> errors = new LinkedList<String>();

-    for (final Pattern pattern : patterns) {

-      {

-        final Iterable<ENamedElement> elements = this.getReferredNamedElements(pattern);

-        for (final ENamedElement element : elements) {

-          boolean _contains = elementsInMetamodel.contains(element);

-          boolean _not = (!_contains);

-          if (_not) {

-            StringConcatenation _builder = new StringConcatenation();

-            _builder.append("Pattern \"");

-            String _name = pattern.getName();

-            _builder.append(_name);

-            _builder.append("\" refers to an element \"");

-            _builder.append(element);

-            _builder.append("\" that is not included to the selected metamodel!");

-            errors.add(_builder.toString());

-          }

-        }

-      }

-    }

-    return errors;

-  }

-  

-  public Iterable<ENamedElement> getReferredNamedElements(final Pattern pattern) {

-    final List<EObject> elements = IteratorExtensions.<EObject>toList(pattern.eAllContents());

-    final Function1<EObject, Iterable<ENamedElement>> _function = (EObject element) -> {

-      final EList<EReference> references = element.eClass().getEAllReferences();

-      final Function1<EReference, Iterable<ENamedElement>> _function_1 = (EReference r) -> {

-        boolean _isMany = r.isMany();

-        if (_isMany) {

-          Object _eGet = element.eGet(r);

-          return Iterables.<ENamedElement>filter(((List<?>) _eGet), ENamedElement.class);

-        } else {

-          final Object value = element.eGet(r);

-          if ((value instanceof ENamedElement)) {

-            return Collections.<ENamedElement>unmodifiableList(CollectionLiterals.<ENamedElement>newArrayList(((ENamedElement)value)));

-          } else {

-            return Collections.<ENamedElement>unmodifiableList(CollectionLiterals.<ENamedElement>newArrayList());

-          }

-        }

-      };

-      return Iterables.<ENamedElement>filter((Iterables.<ENamedElement>concat(ListExtensions.<EReference, Iterable<ENamedElement>>map(references, _function_1))), ENamedElement.class);

-    };

-    return Iterables.<ENamedElement>concat(ListExtensions.<EObject, Iterable<ENamedElement>>map(elements, _function));

-  }

-}

+package hu.bme.mit.inf.dslreasoner.application.validation;
+
+import com.google.common.collect.Iterables;
+import hu.bme.mit.inf.dslreasoner.ecore2logic.EcoreMetamodelDescriptor;
+import hu.bme.mit.inf.dslreasoner.viatra2logic.ViatraQuerySetDescriptor;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EAttribute;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EClassifier;
+import org.eclipse.emf.ecore.EEnum;
+import org.eclipse.emf.ecore.EEnumLiteral;
+import org.eclipse.emf.ecore.ENamedElement;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.viatra.query.patternlanguage.emf.vql.Pattern;
+import org.eclipse.xtend2.lib.StringConcatenation;
+import org.eclipse.xtext.xbase.lib.CollectionLiterals;
+import org.eclipse.xtext.xbase.lib.Functions.Function1;
+import org.eclipse.xtext.xbase.lib.IterableExtensions;
+import org.eclipse.xtext.xbase.lib.IteratorExtensions;
+import org.eclipse.xtext.xbase.lib.ListExtensions;
+import org.eclipse.xtext.xbase.lib.Pair;
+
+@SuppressWarnings("all")
+public class QueryAndMetamodelValidator {
+  public LinkedList<String> validateQueryAndMetamodel(final EcoreMetamodelDescriptor metamodel, final Pair<ViatraQuerySetDescriptor, Set<Pattern>> viatra) {
+    final Set<Pattern> patterns = viatra.getValue();
+    List<EClass> _classes = metamodel.getClasses();
+    List<EEnum> _enums = metamodel.getEnums();
+    Iterable<EClassifier> _plus = Iterables.<EClassifier>concat(_classes, _enums);
+    List<EEnumLiteral> _literals = metamodel.getLiterals();
+    Iterable<ENamedElement> _plus_1 = Iterables.<ENamedElement>concat(_plus, _literals);
+    List<EAttribute> _attributes = metamodel.getAttributes();
+    Iterable<ENamedElement> _plus_2 = Iterables.<ENamedElement>concat(_plus_1, _attributes);
+    List<EReference> _references = metamodel.getReferences();
+    final Set<ENamedElement> elementsInMetamodel = IterableExtensions.<ENamedElement>toSet(Iterables.<ENamedElement>concat(_plus_2, _references));
+    final LinkedList<String> errors = new LinkedList<String>();
+    for (final Pattern pattern : patterns) {
+      {
+        final Iterable<ENamedElement> elements = this.getReferredNamedElements(pattern);
+        for (final ENamedElement element : elements) {
+          boolean _contains = elementsInMetamodel.contains(element);
+          boolean _not = (!_contains);
+          if (_not) {
+            StringConcatenation _builder = new StringConcatenation();
+            _builder.append("Pattern \"");
+            String _name = pattern.getName();
+            _builder.append(_name);
+            _builder.append("\" refers to an element \"");
+            _builder.append(element);
+            _builder.append("\" that is not included to the selected metamodel!");
+            errors.add(_builder.toString());
+          }
+        }
+      }
+    }
+    return errors;
+  }
+  
+  public Iterable<ENamedElement> getReferredNamedElements(final Pattern pattern) {
+    final List<EObject> elements = IteratorExtensions.<EObject>toList(pattern.eAllContents());
+    final Function1<EObject, Iterable<ENamedElement>> _function = (EObject element) -> {
+      final EList<EReference> references = element.eClass().getEAllReferences();
+      final Function1<EReference, Iterable<ENamedElement>> _function_1 = (EReference r) -> {
+        boolean _isMany = r.isMany();
+        if (_isMany) {
+          Object _eGet = element.eGet(r);
+          return Iterables.<ENamedElement>filter(((List<?>) _eGet), ENamedElement.class);
+        } else {
+          final Object value = element.eGet(r);
+          if ((value instanceof ENamedElement)) {
+            return Collections.<ENamedElement>unmodifiableList(CollectionLiterals.<ENamedElement>newArrayList(((ENamedElement)value)));
+          } else {
+            return Collections.<ENamedElement>unmodifiableList(CollectionLiterals.<ENamedElement>newArrayList());
+          }
+        }
+      };
+      return Iterables.<ENamedElement>filter((Iterables.<ENamedElement>concat(ListExtensions.<EReference, Iterable<ENamedElement>>map(references, _function_1))), ENamedElement.class);
+    };
+    return Iterables.<ENamedElement>concat(ListExtensions.<EObject, Iterable<ENamedElement>>map(elements, _function));
+  }
+}
diff --git a/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/valueconverter/ApplicationConfigurationValueConverterService.java b/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/valueconverter/ApplicationConfigurationValueConverterService.java
index e617a132..59a09906 100644
--- a/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/valueconverter/ApplicationConfigurationValueConverterService.java
+++ b/Application/hu.bme.mit.inf.dslreasoner.application/xtend-gen/hu/bme/mit/inf/dslreasoner/application/valueconverter/ApplicationConfigurationValueConverterService.java
@@ -1,16 +1,16 @@
-package hu.bme.mit.inf.dslreasoner.application.valueconverter;

-

-import hu.bme.mit.inf.dslreasoner.application.valueconverter.QualifiedNameValueConverter;

-import org.eclipse.xtext.common.services.DefaultTerminalConverters;

-import org.eclipse.xtext.conversion.IValueConverter;

-import org.eclipse.xtext.conversion.ValueConverter;

-

-@SuppressWarnings("all")

-public class ApplicationConfigurationValueConverterService extends DefaultTerminalConverters {

-  private final QualifiedNameValueConverter converter2 = new QualifiedNameValueConverter();

-  

-  @ValueConverter(rule = "QualifiedName")

-  public IValueConverter<String> QualifiedName() {

-    return this.converter2;

-  }

-}

+package hu.bme.mit.inf.dslreasoner.application.valueconverter;
+
+import hu.bme.mit.inf.dslreasoner.application.valueconverter.QualifiedNameValueConverter;
+import org.eclipse.xtext.common.services.DefaultTerminalConverters;
+import org.eclipse.xtext.conversion.IValueConverter;
+import org.eclipse.xtext.conversion.ValueConverter;
+
+@SuppressWarnings("all")
+public class ApplicationConfigurationValueConverterService extends DefaultTerminalConverters {
+  private final QualifiedNameValueConverter converter2 = new QualifiedNameValueConverter();
+  
+  @ValueConverter(rule = "QualifiedName")
+  public IValueConverter<String> QualifiedName() {
+    return this.converter2;
+  }
+}
diff --git a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/ErrorPredicate.java b/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/ErrorPredicate.java
deleted file mode 100644
index c8e49d48..00000000
--- a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/ErrorPredicate.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/**

- * generated by Xtext 2.18.0.M3

- */

-package org.eclipse.viatra.solver.language.solverLanguage;

-

-

-/**

- * <!-- begin-user-doc -->

- * A representation of the model object '<em><b>Error Predicate</b></em>'.

- * <!-- end-user-doc -->

- *

- * <p>

- * The following features are supported:

- * </p>

- * <ul>

- *   <li>{@link org.eclipse.viatra.solver.language.solverLanguage.ErrorPredicate#getName <em>Name</em>}</li>

- * </ul>

- *

- * @see org.eclipse.viatra.solver.language.solverLanguage.SolverLanguagePackage#getErrorPredicate()

- * @model

- * @generated

- */

-public interface ErrorPredicate extends Predicate

-{

-  /**

-   * Returns the value of the '<em><b>Name</b></em>' attribute.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @return the value of the '<em>Name</em>' attribute.

-   * @see #setName(String)

-   * @see org.eclipse.viatra.solver.language.solverLanguage.SolverLanguagePackage#getErrorPredicate_Name()

-   * @model

-   * @generated

-   */

-  String getName();

-

-  /**

-   * Sets the value of the '{@link org.eclipse.viatra.solver.language.solverLanguage.ErrorPredicate#getName <em>Name</em>}' attribute.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @param value the new value of the '<em>Name</em>' attribute.

-   * @see #getName()

-   * @generated

-   */

-  void setName(String value);

-

-} // ErrorPredicate

diff --git a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/PredicateSymbol.java b/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/PredicateSymbol.java
deleted file mode 100644
index 0f1d0c47..00000000
--- a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/PredicateSymbol.java
+++ /dev/null
@@ -1,47 +0,0 @@
-/**

- * generated by Xtext 2.18.0.M3

- */

-package org.eclipse.viatra.solver.language.solverLanguage;

-

-

-/**

- * <!-- begin-user-doc -->

- * A representation of the model object '<em><b>Predicate Symbol</b></em>'.

- * <!-- end-user-doc -->

- *

- * <p>

- * The following features are supported:

- * </p>

- * <ul>

- *   <li>{@link org.eclipse.viatra.solver.language.solverLanguage.PredicateSymbol#getSymbol <em>Symbol</em>}</li>

- * </ul>

- *

- * @see org.eclipse.viatra.solver.language.solverLanguage.SolverLanguagePackage#getPredicateSymbol()

- * @model

- * @generated

- */

-public interface PredicateSymbol extends Predicate

-{

-  /**

-   * Returns the value of the '<em><b>Symbol</b></em>' containment reference.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @return the value of the '<em>Symbol</em>' containment reference.

-   * @see #setSymbol(ModelSymbol)

-   * @see org.eclipse.viatra.solver.language.solverLanguage.SolverLanguagePackage#getPredicateSymbol_Symbol()

-   * @model containment="true"

-   * @generated

-   */

-  ModelSymbol getSymbol();

-

-  /**

-   * Sets the value of the '{@link org.eclipse.viatra.solver.language.solverLanguage.PredicateSymbol#getSymbol <em>Symbol</em>}' containment reference.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @param value the new value of the '<em>Symbol</em>' containment reference.

-   * @see #getSymbol()

-   * @generated

-   */

-  void setSymbol(ModelSymbol value);

-

-} // PredicateSymbol

diff --git a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/impl/ErrorPredicateImpl.java b/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/impl/ErrorPredicateImpl.java
deleted file mode 100644
index f9b0e8c8..00000000
--- a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/impl/ErrorPredicateImpl.java
+++ /dev/null
@@ -1,179 +0,0 @@
-/**

- * generated by Xtext 2.18.0.M3

- */

-package org.eclipse.viatra.solver.language.solverLanguage.impl;

-

-import org.eclipse.emf.common.notify.Notification;

-

-import org.eclipse.emf.ecore.EClass;

-

-import org.eclipse.emf.ecore.impl.ENotificationImpl;

-

-import org.eclipse.viatra.solver.language.solverLanguage.ErrorPredicate;

-import org.eclipse.viatra.solver.language.solverLanguage.SolverLanguagePackage;

-

-/**

- * <!-- begin-user-doc -->

- * An implementation of the model object '<em><b>Error Predicate</b></em>'.

- * <!-- end-user-doc -->

- * <p>

- * The following features are implemented:

- * </p>

- * <ul>

- *   <li>{@link org.eclipse.viatra.solver.language.solverLanguage.impl.ErrorPredicateImpl#getName <em>Name</em>}</li>

- * </ul>

- *

- * @generated

- */

-public class ErrorPredicateImpl extends PredicateImpl implements ErrorPredicate

-{

-  /**

-   * The default value of the '{@link #getName() <em>Name</em>}' attribute.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @see #getName()

-   * @generated

-   * @ordered

-   */

-  protected static final String NAME_EDEFAULT = null;

-

-  /**

-   * The cached value of the '{@link #getName() <em>Name</em>}' attribute.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @see #getName()

-   * @generated

-   * @ordered

-   */

-  protected String name = NAME_EDEFAULT;

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  protected ErrorPredicateImpl()

-  {

-    super();

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  protected EClass eStaticClass()

-  {

-    return SolverLanguagePackage.Literals.ERROR_PREDICATE;

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public String getName()

-  {

-    return name;

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public void setName(String newName)

-  {

-    String oldName = name;

-    name = newName;

-    if (eNotificationRequired())

-      eNotify(new ENotificationImpl(this, Notification.SET, SolverLanguagePackage.ERROR_PREDICATE__NAME, oldName, name));

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public Object eGet(int featureID, boolean resolve, boolean coreType)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.ERROR_PREDICATE__NAME:

-        return getName();

-    }

-    return super.eGet(featureID, resolve, coreType);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public void eSet(int featureID, Object newValue)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.ERROR_PREDICATE__NAME:

-        setName((String)newValue);

-        return;

-    }

-    super.eSet(featureID, newValue);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public void eUnset(int featureID)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.ERROR_PREDICATE__NAME:

-        setName(NAME_EDEFAULT);

-        return;

-    }

-    super.eUnset(featureID);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public boolean eIsSet(int featureID)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.ERROR_PREDICATE__NAME:

-        return NAME_EDEFAULT == null ? name != null : !NAME_EDEFAULT.equals(name);

-    }

-    return super.eIsSet(featureID);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public String toString()

-  {

-    if (eIsProxy()) return super.toString();

-

-    StringBuilder result = new StringBuilder(super.toString());

-    result.append(" (name: ");

-    result.append(name);

-    result.append(')');

-    return result.toString();

-  }

-

-} //ErrorPredicateImpl

diff --git a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/impl/PredicateSymbolImpl.java b/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/impl/PredicateSymbolImpl.java
deleted file mode 100644
index f49c6701..00000000
--- a/Application/org.eclipse.viatra.solver.language/src-gen/org/eclipse/viatra/solver/language/solverLanguage/impl/PredicateSymbolImpl.java
+++ /dev/null
@@ -1,196 +0,0 @@
-/**

- * generated by Xtext 2.18.0.M3

- */

-package org.eclipse.viatra.solver.language.solverLanguage.impl;

-

-import org.eclipse.emf.common.notify.Notification;

-import org.eclipse.emf.common.notify.NotificationChain;

-

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.emf.ecore.InternalEObject;

-

-import org.eclipse.emf.ecore.impl.ENotificationImpl;

-

-import org.eclipse.viatra.solver.language.solverLanguage.ModelSymbol;

-import org.eclipse.viatra.solver.language.solverLanguage.PredicateSymbol;

-import org.eclipse.viatra.solver.language.solverLanguage.SolverLanguagePackage;

-

-/**

- * <!-- begin-user-doc -->

- * An implementation of the model object '<em><b>Predicate Symbol</b></em>'.

- * <!-- end-user-doc -->

- * <p>

- * The following features are implemented:

- * </p>

- * <ul>

- *   <li>{@link org.eclipse.viatra.solver.language.solverLanguage.impl.PredicateSymbolImpl#getSymbol <em>Symbol</em>}</li>

- * </ul>

- *

- * @generated

- */

-public class PredicateSymbolImpl extends PredicateImpl implements PredicateSymbol

-{

-  /**

-   * The cached value of the '{@link #getSymbol() <em>Symbol</em>}' containment reference.

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @see #getSymbol()

-   * @generated

-   * @ordered

-   */

-  protected ModelSymbol symbol;

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  protected PredicateSymbolImpl()

-  {

-    super();

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  protected EClass eStaticClass()

-  {

-    return SolverLanguagePackage.Literals.PREDICATE_SYMBOL;

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public ModelSymbol getSymbol()

-  {

-    return symbol;

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  public NotificationChain basicSetSymbol(ModelSymbol newSymbol, NotificationChain msgs)

-  {

-    ModelSymbol oldSymbol = symbol;

-    symbol = newSymbol;

-    if (eNotificationRequired())

-    {

-      ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL, oldSymbol, newSymbol);

-      if (msgs == null) msgs = notification; else msgs.add(notification);

-    }

-    return msgs;

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public void setSymbol(ModelSymbol newSymbol)

-  {

-    if (newSymbol != symbol)

-    {

-      NotificationChain msgs = null;

-      if (symbol != null)

-        msgs = ((InternalEObject)symbol).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL, null, msgs);

-      if (newSymbol != null)

-        msgs = ((InternalEObject)newSymbol).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL, null, msgs);

-      msgs = basicSetSymbol(newSymbol, msgs);

-      if (msgs != null) msgs.dispatch();

-    }

-    else if (eNotificationRequired())

-      eNotify(new ENotificationImpl(this, Notification.SET, SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL, newSymbol, newSymbol));

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL:

-        return basicSetSymbol(null, msgs);

-    }

-    return super.eInverseRemove(otherEnd, featureID, msgs);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public Object eGet(int featureID, boolean resolve, boolean coreType)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL:

-        return getSymbol();

-    }

-    return super.eGet(featureID, resolve, coreType);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public void eSet(int featureID, Object newValue)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL:

-        setSymbol((ModelSymbol)newValue);

-        return;

-    }

-    super.eSet(featureID, newValue);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public void eUnset(int featureID)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL:

-        setSymbol((ModelSymbol)null);

-        return;

-    }

-    super.eUnset(featureID);

-  }

-

-  /**

-   * <!-- begin-user-doc -->

-   * <!-- end-user-doc -->

-   * @generated

-   */

-  @Override

-  public boolean eIsSet(int featureID)

-  {

-    switch (featureID)

-    {

-      case SolverLanguagePackage.PREDICATE_SYMBOL__SYMBOL:

-        return symbol != null;

-    }

-    return super.eIsSet(featureID);

-  }

-

-} //PredicateSymbolImpl

diff --git a/Domains/Examples/ModelGenExampleFAM_plugin/META-INF/MANIFEST.MF b/Domains/Examples/ModelGenExampleFAM_plugin/META-INF/MANIFEST.MF
index f1f5d18c..077e646b 100644
--- a/Domains/Examples/ModelGenExampleFAM_plugin/META-INF/MANIFEST.MF
+++ b/Domains/Examples/ModelGenExampleFAM_plugin/META-INF/MANIFEST.MF
@@ -7,16 +7,16 @@ Bundle-ClassPath: .
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
 Export-Package: functionalarchitecture,
-  functionalarchitecture.impl,
-  functionalarchitecture.util,
-  hu.bme.mit.inf.dslreasoner.domains.transima.fam
+ functionalarchitecture.impl,
+ functionalarchitecture.util,
+ hu.bme.mit.inf.dslreasoner.domains.transima.fam
 Require-Bundle: ModelGenExampleFAM_plugin,
-  org.eclipse.viatra.addon.querybasedfeatures.runtime,
-  org.eclipse.viatra.query.runtime,
-  org.apache.log4j;bundle-version="1.2.15",
-  com.google.guava;bundle-version="15.0.0",
-  org.eclipse.core.runtime,
-  org.eclipse.emf.ecore;visibility:=reexport
+ org.eclipse.viatra.addon.querybasedfeatures.runtime,
+ org.eclipse.viatra.query.runtime,
+ org.apache.log4j;bundle-version="1.2.15",
+ com.google.guava;bundle-version="15.0.0",
+ org.eclipse.core.runtime,
+ org.eclipse.emf.ecore;visibility:=reexport
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-ActivationPolicy: lazy
 Automatic-Module-Name: ModelGenExampleFAM_plugin
diff --git a/Domains/Examples/ModelGenExampleFAM_plugin/model/FamMetamodel.ecore b/Domains/Examples/ModelGenExampleFAM_plugin/model/FamMetamodel.ecore
index d8331ba8..9654ba41 100644
--- a/Domains/Examples/ModelGenExampleFAM_plugin/model/FamMetamodel.ecore
+++ b/Domains/Examples/ModelGenExampleFAM_plugin/model/FamMetamodel.ecore
@@ -1,69 +1,69 @@
-<?xml version="1.0" encoding="UTF-8"?>

-<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

-    xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="functionalarchitecture" nsURI="http://www.inf.mit.bme.hu/viatrasolver/example/fam"

-    nsPrefix="functionalarchitecture">

-  <eAnnotations source="http://www.eclipse.org/emf/2002/Ecore">

-    <details key="settingDelegates" value="org.eclipse.viatra.query.querybasedfeature"/>

-  </eAnnotations>

-  <eClassifiers xsi:type="ecore:EClass" name="FunctionalElement" abstract="true">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="interface" eType="#//FunctionalInterface"

-        containment="true" eOpposite="#//FunctionalInterface/element"/>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="model" lowerBound="1" eType="#//FunctionalArchitectureModel"

-        volatile="true" transient="true" derived="true">

-      <eAnnotations source="org.eclipse.viatra.query.querybasedfeature">

-        <details key="patternFQN" value="hu.bme.mit.inf.dslreasoner.domains.transima.fam.model"/>

-      </eAnnotations>

-    </eStructuralFeatures>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="parent" eType="#//Function"

-        eOpposite="#//Function/subElements"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FunctionalArchitectureModel">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="rootElements" upperBound="-1"

-        eType="#//FunctionalElement" containment="true"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="Function" eSuperTypes="#//FunctionalElement">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="subElements" upperBound="-1"

-        eType="#//FunctionalElement" containment="true" eOpposite="#//FunctionalElement/parent"/>

-    <eStructuralFeatures xsi:type="ecore:EAttribute" name="type" lowerBound="1" eType="#//FunctionType"

-        changeable="false" volatile="true" transient="true" derived="true">

-      <eAnnotations source="org.eclipse.viatra.query.querybasedfeature">

-        <details key="patternFQN" value="hu.bme.mit.inf.dslreasoner.domains.transima.fam.type"/>

-      </eAnnotations>

-    </eStructuralFeatures>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FAMTerminator">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="data" eType="#//FunctionalData"

-        eOpposite="#//FunctionalData/terminator"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="InformationLink">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="from" eType="#//FunctionalOutput"

-        eOpposite="#//FunctionalOutput/outgoingLinks"/>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="to" lowerBound="1" eType="#//FunctionalInput"

-        eOpposite="#//FunctionalInput/IncomingLinks"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FunctionalInterface">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="data" upperBound="-1" eType="#//FunctionalData"

-        containment="true" eOpposite="#//FunctionalData/interface"/>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="element" eType="#//FunctionalElement"

-        eOpposite="#//FunctionalElement/interface"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FunctionalInput" eSuperTypes="#//FunctionalData">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="IncomingLinks" upperBound="-1"

-        eType="#//InformationLink" eOpposite="#//InformationLink/to"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FunctionalOutput" eSuperTypes="#//FunctionalData">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="outgoingLinks" upperBound="-1"

-        eType="#//InformationLink" containment="true" eOpposite="#//InformationLink/from"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FunctionalData" abstract="true">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="terminator" eType="#//FAMTerminator"

-        containment="true" eOpposite="#//FAMTerminator/data"/>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="interface" eType="#//FunctionalInterface"

-        eOpposite="#//FunctionalInterface/data"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EEnum" name="FunctionType">

-    <eLiterals name="Root"/>

-    <eLiterals name="Intermediate" value="1"/>

-    <eLiterals name="Leaf" value="2"/>

-  </eClassifiers>

-</ecore:EPackage>

+<?xml version="1.0" encoding="UTF-8"?>
+<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="functionalarchitecture" nsURI="http://www.inf.mit.bme.hu/viatrasolver/example/fam"
+    nsPrefix="functionalarchitecture">
+  <eAnnotations source="http://www.eclipse.org/emf/2002/Ecore">
+    <details key="settingDelegates" value="org.eclipse.viatra.query.querybasedfeature"/>
+  </eAnnotations>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionalElement" abstract="true">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="interface" eType="#//FunctionalInterface"
+        containment="true" eOpposite="#//FunctionalInterface/element"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="model" lowerBound="1" eType="#//FunctionalArchitectureModel"
+        volatile="true" transient="true" derived="true">
+      <eAnnotations source="org.eclipse.viatra.query.querybasedfeature">
+        <details key="patternFQN" value="hu.bme.mit.inf.dslreasoner.domains.transima.fam.model"/>
+      </eAnnotations>
+    </eStructuralFeatures>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="parent" eType="#//Function"
+        eOpposite="#//Function/subElements"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionalArchitectureModel">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="rootElements" upperBound="-1"
+        eType="#//FunctionalElement" containment="true"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="Function" eSuperTypes="#//FunctionalElement">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="subElements" upperBound="-1"
+        eType="#//FunctionalElement" containment="true" eOpposite="#//FunctionalElement/parent"/>
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="type" lowerBound="1" eType="#//FunctionType"
+        changeable="false" volatile="true" transient="true" derived="true">
+      <eAnnotations source="org.eclipse.viatra.query.querybasedfeature">
+        <details key="patternFQN" value="hu.bme.mit.inf.dslreasoner.domains.transima.fam.type"/>
+      </eAnnotations>
+    </eStructuralFeatures>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FAMTerminator">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="data" eType="#//FunctionalData"
+        eOpposite="#//FunctionalData/terminator"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="InformationLink">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="from" eType="#//FunctionalOutput"
+        eOpposite="#//FunctionalOutput/outgoingLinks"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="to" lowerBound="1" eType="#//FunctionalInput"
+        eOpposite="#//FunctionalInput/IncomingLinks"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionalInterface">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="data" upperBound="-1" eType="#//FunctionalData"
+        containment="true" eOpposite="#//FunctionalData/interface"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="element" eType="#//FunctionalElement"
+        eOpposite="#//FunctionalElement/interface"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionalInput" eSuperTypes="#//FunctionalData">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="IncomingLinks" upperBound="-1"
+        eType="#//InformationLink" eOpposite="#//InformationLink/to"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionalOutput" eSuperTypes="#//FunctionalData">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="outgoingLinks" upperBound="-1"
+        eType="#//InformationLink" containment="true" eOpposite="#//InformationLink/from"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FunctionalData" abstract="true">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="terminator" eType="#//FAMTerminator"
+        containment="true" eOpposite="#//FAMTerminator/data"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="interface" eType="#//FunctionalInterface"
+        eOpposite="#//FunctionalInterface/data"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EEnum" name="FunctionType">
+    <eLiterals name="Root"/>
+    <eLiterals name="Intermediate" value="1"/>
+    <eLiterals name="Leaf" value="2"/>
+  </eClassifiers>
+</ecore:EPackage>
diff --git a/Domains/Examples/ModelGenExampleFAM_plugin/plugin.xml b/Domains/Examples/ModelGenExampleFAM_plugin/plugin.xml
index 3dce57aa..213ec0ed 100644
--- a/Domains/Examples/ModelGenExampleFAM_plugin/plugin.xml
+++ b/Domains/Examples/ModelGenExampleFAM_plugin/plugin.xml
@@ -1,24 +1,24 @@
-<?xml version="1.0" encoding="UTF-8"?><plugin>

-  <extension id="extension.derived.hu.bme.mit.inf.dslreasoner.domains.transima.fam.model" point="org.eclipse.viatra.query.runtime.base.wellbehaving.derived.features">

-    <wellbehaving-derived-feature classifier-name="FunctionalElement" feature-name="model" package-nsUri="http://www.inf.mit.bme.hu/viatrasolver/example/fam"/>

-  </extension>

-  <extension id="extension.derived.hu.bme.mit.inf.dslreasoner.domains.transima.fam.type" point="org.eclipse.viatra.query.runtime.base.wellbehaving.derived.features">

-    <wellbehaving-derived-feature classifier-name="Function" feature-name="type" package-nsUri="http://www.inf.mit.bme.hu/viatrasolver/example/fam"/>

-  </extension>

-  <extension point="org.eclipse.emf.ecore.generated_package">

-    <!-- @generated FamMetamodel -->

-    <package class="functionalarchitecture.FunctionalarchitecturePackage" genModel="model/FamMetamodel.genmodel" uri="http://www.inf.mit.bme.hu/viatrasolver/example/fam"/>

-  </extension>

-  <extension id="hu.bme.mit.inf.dslreasoner.domains.transima.fam.FamPatterns" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.domains.transima.fam.FamPatterns" id="hu.bme.mit.inf.dslreasoner.domains.transima.fam.FamPatterns">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.terminatorAndInformation"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.type"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.rootElements"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.parent"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.model"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.hasRoot"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.hasInt"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.hasLeaf"/>

-    </group>

-  </extension>

-</plugin>

+<?xml version="1.0" encoding="UTF-8"?><plugin>
+  <extension id="extension.derived.hu.bme.mit.inf.dslreasoner.domains.transima.fam.model" point="org.eclipse.viatra.query.runtime.base.wellbehaving.derived.features">
+    <wellbehaving-derived-feature classifier-name="FunctionalElement" feature-name="model" package-nsUri="http://www.inf.mit.bme.hu/viatrasolver/example/fam"/>
+  </extension>
+  <extension id="extension.derived.hu.bme.mit.inf.dslreasoner.domains.transima.fam.type" point="org.eclipse.viatra.query.runtime.base.wellbehaving.derived.features">
+    <wellbehaving-derived-feature classifier-name="Function" feature-name="type" package-nsUri="http://www.inf.mit.bme.hu/viatrasolver/example/fam"/>
+  </extension>
+  <extension point="org.eclipse.emf.ecore.generated_package">
+    <!-- @generated FamMetamodel -->
+    <package class="functionalarchitecture.FunctionalarchitecturePackage" genModel="model/FamMetamodel.genmodel" uri="http://www.inf.mit.bme.hu/viatrasolver/example/fam"/>
+  </extension>
+  <extension id="hu.bme.mit.inf.dslreasoner.domains.transima.fam.FamPatterns" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.domains.transima.fam.FamPatterns" id="hu.bme.mit.inf.dslreasoner.domains.transima.fam.FamPatterns">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.terminatorAndInformation"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.type"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.rootElements"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.parent"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.model"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.hasRoot"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.hasInt"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.transima.fam.hasLeaf"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/META-INF/MANIFEST.MF b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/META-INF/MANIFEST.MF
index 41726ae6..5fb85170 100644
--- a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/META-INF/MANIFEST.MF
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/META-INF/MANIFEST.MF
@@ -6,19 +6,19 @@ Bundle-Version: 1.0.0.qualifier
 Bundle-ClassPath: .
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-Export-Package: hu.bme.mit.inf.dslreasoner.domains.alloyexamples,

- hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem,

- hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.impl,

- hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.util,

+Export-Package: hu.bme.mit.inf.dslreasoner.domains.alloyexamples,
+ hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem,
+ hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.impl,
+ hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.util,
  hu.bme.mit.inf.dslreasoner.domains.alloyexamples.util
-Require-Bundle: org.eclipse.viatra.addon.querybasedfeatures.runtime,

- org.eclipse.viatra.query.runtime,

- org.eclipse.core.runtime,

- org.eclipse.emf.ecore;visibility:=reexport,

- org.eclipse.emf.emfstore.common,

- com.google.guava,

- org.eclipse.xtext.xbase.lib,

- org.eclipse.xtend.lib,

+Require-Bundle: org.eclipse.viatra.addon.querybasedfeatures.runtime,
+ org.eclipse.viatra.query.runtime,
+ org.eclipse.core.runtime,
+ org.eclipse.emf.ecore;visibility:=reexport,
+ org.eclipse.emf.emfstore.common,
+ com.google.guava,
+ org.eclipse.xtext.xbase.lib,
+ org.eclipse.xtend.lib,
  org.eclipse.xtend.lib.macro
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-ActivationPolicy: lazy
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/model/FileSytem.ecore b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/model/FileSytem.ecore
index c928d2b0..87ba7135 100644
--- a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/model/FileSytem.ecore
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/model/FileSytem.ecore
@@ -1,32 +1,32 @@
-<?xml version="1.0" encoding="UTF-8"?>

-<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

-    xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="Filesystem" nsURI="FS" nsPrefix="FS">

-  <eAnnotations source="http://www.eclipse.org/emf/2002/Ecore">

-    <details key="settingDelegates" value="org.eclipse.viatra.query.querybasedfeature"/>

-  </eAnnotations>

-  <eClassifiers xsi:type="ecore:EClass" name="FileSystem">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="root" lowerBound="1" eType="#//Dir"

-        containment="true"/>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="live" upperBound="-1" eType="#//FSObject"

-        changeable="false" volatile="true" transient="true" derived="true">

-      <eAnnotations source="org.eclipse.viatra.query.querybasedfeature">

-        <details key="patternFQN" value="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live"/>

-      </eAnnotations>

-    </eStructuralFeatures>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="FSObject" abstract="true">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="parent" eType="#//Dir"

-        eOpposite="#//Dir/contents"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="Dir" eSuperTypes="#//FSObject">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="contents" upperBound="-1"

-        eType="#//FSObject" containment="true" eOpposite="#//FSObject/parent"/>

-  </eClassifiers>

-  <eClassifiers xsi:type="ecore:EClass" name="File" eSuperTypes="#//FSObject"/>

-  <eClassifiers xsi:type="ecore:EClass" name="Model">

-    <eStructuralFeatures xsi:type="ecore:EReference" name="filesystems" lowerBound="1"

-        eType="#//FileSystem" containment="true"/>

-    <eStructuralFeatures xsi:type="ecore:EReference" name="otherFSObjects" upperBound="-1"

-        eType="#//FSObject" containment="true"/>

-  </eClassifiers>

-</ecore:EPackage>

+<?xml version="1.0" encoding="UTF-8"?>
+<ecore:EPackage xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" name="Filesystem" nsURI="FS" nsPrefix="FS">
+  <eAnnotations source="http://www.eclipse.org/emf/2002/Ecore">
+    <details key="settingDelegates" value="org.eclipse.viatra.query.querybasedfeature"/>
+  </eAnnotations>
+  <eClassifiers xsi:type="ecore:EClass" name="FileSystem">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="root" lowerBound="1" eType="#//Dir"
+        containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="live" upperBound="-1" eType="#//FSObject"
+        changeable="false" volatile="true" transient="true" derived="true">
+      <eAnnotations source="org.eclipse.viatra.query.querybasedfeature">
+        <details key="patternFQN" value="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live"/>
+      </eAnnotations>
+    </eStructuralFeatures>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="FSObject" abstract="true">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="parent" eType="#//Dir"
+        eOpposite="#//Dir/contents"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="Dir" eSuperTypes="#//FSObject">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="contents" upperBound="-1"
+        eType="#//FSObject" containment="true" eOpposite="#//FSObject/parent"/>
+  </eClassifiers>
+  <eClassifiers xsi:type="ecore:EClass" name="File" eSuperTypes="#//FSObject"/>
+  <eClassifiers xsi:type="ecore:EClass" name="Model">
+    <eStructuralFeatures xsi:type="ecore:EReference" name="filesystems" lowerBound="1"
+        eType="#//FileSystem" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="otherFSObjects" upperBound="-1"
+        eType="#//FSObject" containment="true"/>
+  </eClassifiers>
+</ecore:EPackage>
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/plugin.xml b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/plugin.xml
index 576aa06e..d7fd112a 100644
--- a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/plugin.xml
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/plugin.xml
@@ -1,26 +1,26 @@
 <?xml version="1.0" encoding="UTF-8"?><?eclipse version="3.0"?><!--
---><plugin>

-  <extension point="org.eclipse.emf.ecore.generated_package">

-    <!-- @generated FileSytem -->

-    <package class="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FilesystemPackage" genModel="model/FileSytem.genmodel" uri="FS"/>

-  </extension>

-  <extension id="extension.derived.hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live" point="org.eclipse.viatra.query.runtime.base.wellbehaving.derived.features">

-    <wellbehaving-derived-feature classifier-name="FileSystem" feature-name="live" package-nsUri="FS"/>

-  </extension>

-  <extension id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Ecore" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Ecore" id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Ecore">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.directSupertype"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.loopInInheritence"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.opposite"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.oppositeDifferentClass"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.nonSymmetricOpposite"/>

-    </group>

-  </extension>

-  <extension id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.FileSystem" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.domains.alloyexamples.FileSystem" id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.FileSystem">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.patternContent"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.contentInNotLive"/>

-    </group>

-  </extension>

-</plugin>

+--><plugin>
+  <extension point="org.eclipse.emf.ecore.generated_package">
+    <!-- @generated FileSytem -->
+    <package class="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FilesystemPackage" genModel="model/FileSytem.genmodel" uri="FS"/>
+  </extension>
+  <extension id="extension.derived.hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live" point="org.eclipse.viatra.query.runtime.base.wellbehaving.derived.features">
+    <wellbehaving-derived-feature classifier-name="FileSystem" feature-name="live" package-nsUri="FS"/>
+  </extension>
+  <extension id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Ecore" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Ecore" id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Ecore">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.directSupertype"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.loopInInheritence"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.opposite"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.oppositeDifferentClass"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.nonSymmetricOpposite"/>
+    </group>
+  </extension>
+  <extension id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.FileSystem" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.domains.alloyexamples.FileSystem" id="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.FileSystem">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.patternContent"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.domains.alloyexamples.contentInNotLive"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/.gitignore b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/.gitignore
index 9d608403..52338993 100644
--- a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/.gitignore
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/.gitignore
@@ -34,3 +34,11 @@
 /OppositeMatcher.java
 /PatternContentMatch.java
 /PatternContentMatcher.java
+/.ContentInNotLive.java._trace
+/.DirectSupertype.java._trace
+/.Live.java._trace
+/.LoopInInheritence.java._trace
+/.NonSymmetricOpposite.java._trace
+/.Opposite.java._trace
+/.OppositeDifferentClass.java._trace
+/.PatternContent.java._trace
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/ContentInNotLive.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/ContentInNotLive.java
new file mode 100644
index 00000000..ef0aaaf3
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/ContentInNotLive.java
@@ -0,0 +1,752 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/FileSystem.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.Dir;
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject;
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Live;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(key={child}, severity="error", message="error")
+ *         pattern contentInNotLive(parent : Dir, child: FSObject) {
+ *              Dir.contents(parent,child);
+ *              neg find live(_,parent);
+ *         } or {
+ *              Dir.contents(parent,child);
+ *              neg find live(_,child);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ContentInNotLive extends BaseGeneratedEMFQuerySpecification<ContentInNotLive.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.contentInNotLive pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Dir fParent;
+    
+    private FSObject fChild;
+    
+    private static List<String> parameterNames = makeImmutableList("parent", "child");
+    
+    private Match(final Dir pParent, final FSObject pChild) {
+      this.fParent = pParent;
+      this.fChild = pChild;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "parent": return this.fParent;
+          case "child": return this.fChild;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fParent;
+          case 1: return this.fChild;
+          default: return null;
+      }
+    }
+    
+    public Dir getParent() {
+      return this.fParent;
+    }
+    
+    public FSObject getChild() {
+      return this.fChild;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("parent".equals(parameterName) ) {
+          this.fParent = (Dir) newValue;
+          return true;
+      }
+      if ("child".equals(parameterName) ) {
+          this.fChild = (FSObject) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setParent(final Dir pParent) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fParent = pParent;
+    }
+    
+    public void setChild(final FSObject pChild) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fChild = pChild;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.contentInNotLive";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ContentInNotLive.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fParent, fChild};
+    }
+    
+    @Override
+    public ContentInNotLive.Match toImmutable() {
+      return isMutable() ? newMatch(fParent, fChild) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"parent\"=" + prettyPrintValue(fParent) + ", ");
+      result.append("\"child\"=" + prettyPrintValue(fChild));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fParent, fChild);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ContentInNotLive.Match)) {
+          ContentInNotLive.Match other = (ContentInNotLive.Match) obj;
+          return Objects.equals(fParent, other.fParent) && Objects.equals(fChild, other.fChild);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ContentInNotLive specification() {
+      return ContentInNotLive.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ContentInNotLive.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ContentInNotLive.Match newMutableMatch(final Dir pParent, final FSObject pChild) {
+      return new Mutable(pParent, pChild);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ContentInNotLive.Match newMatch(final Dir pParent, final FSObject pChild) {
+      return new Immutable(pParent, pChild);
+    }
+    
+    private static final class Mutable extends ContentInNotLive.Match {
+      Mutable(final Dir pParent, final FSObject pChild) {
+        super(pParent, pChild);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ContentInNotLive.Match {
+      Immutable(final Dir pParent, final FSObject pChild) {
+        super(pParent, pChild);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.contentInNotLive pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(key={child}, severity="error", message="error")
+   * pattern contentInNotLive(parent : Dir, child: FSObject) {
+   *    Dir.contents(parent,child);
+   *    neg find live(_,parent);
+   * } or {
+   *    Dir.contents(parent,child);
+   *    neg find live(_,child);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ContentInNotLive
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ContentInNotLive.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ContentInNotLive.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ContentInNotLive.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_PARENT = 0;
+    
+    private static final int POSITION_CHILD = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ContentInNotLive.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ContentInNotLive.Match> getAllMatches(final Dir pParent, final FSObject pChild) {
+      return rawStreamAllMatches(new Object[]{pParent, pChild}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ContentInNotLive.Match> streamAllMatches(final Dir pParent, final FSObject pChild) {
+      return rawStreamAllMatches(new Object[]{pParent, pChild});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ContentInNotLive.Match> getOneArbitraryMatch(final Dir pParent, final FSObject pChild) {
+      return rawGetOneArbitraryMatch(new Object[]{pParent, pChild});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Dir pParent, final FSObject pChild) {
+      return rawHasMatch(new Object[]{pParent, pChild});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Dir pParent, final FSObject pChild) {
+      return rawCountMatches(new Object[]{pParent, pChild});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Dir pParent, final FSObject pChild, final Consumer<? super ContentInNotLive.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pParent, pChild}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pParent the fixed value of pattern parameter parent, or null if not bound.
+     * @param pChild the fixed value of pattern parameter child, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ContentInNotLive.Match newMatch(final Dir pParent, final FSObject pChild) {
+      return ContentInNotLive.Match.newMatch(pParent, pChild);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Dir> rawStreamAllValuesOfparent(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_PARENT, parameters).map(Dir.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Dir> getAllValuesOfparent() {
+      return rawStreamAllValuesOfparent(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Dir> streamAllValuesOfparent() {
+      return rawStreamAllValuesOfparent(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Dir> streamAllValuesOfparent(final ContentInNotLive.Match partialMatch) {
+      return rawStreamAllValuesOfparent(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Dir> streamAllValuesOfparent(final FSObject pChild) {
+      return rawStreamAllValuesOfparent(new Object[]{null, pChild});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Dir> getAllValuesOfparent(final ContentInNotLive.Match partialMatch) {
+      return rawStreamAllValuesOfparent(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for parent.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Dir> getAllValuesOfparent(final FSObject pChild) {
+      return rawStreamAllValuesOfparent(new Object[]{null, pChild}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<FSObject> rawStreamAllValuesOfchild(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_CHILD, parameters).map(FSObject.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfchild() {
+      return rawStreamAllValuesOfchild(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfchild() {
+      return rawStreamAllValuesOfchild(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfchild(final ContentInNotLive.Match partialMatch) {
+      return rawStreamAllValuesOfchild(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfchild(final Dir pParent) {
+      return rawStreamAllValuesOfchild(new Object[]{pParent, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfchild(final ContentInNotLive.Match partialMatch) {
+      return rawStreamAllValuesOfchild(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for child.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfchild(final Dir pParent) {
+      return rawStreamAllValuesOfchild(new Object[]{pParent, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ContentInNotLive.Match tupleToMatch(final Tuple t) {
+      try {
+          return ContentInNotLive.Match.newMatch((Dir) t.get(POSITION_PARENT), (FSObject) t.get(POSITION_CHILD));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ContentInNotLive.Match arrayToMatch(final Object[] match) {
+      try {
+          return ContentInNotLive.Match.newMatch((Dir) match[POSITION_PARENT], (FSObject) match[POSITION_CHILD]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ContentInNotLive.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ContentInNotLive.Match.newMutableMatch((Dir) match[POSITION_PARENT], (FSObject) match[POSITION_CHILD]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ContentInNotLive.Matcher> querySpecification() {
+      return ContentInNotLive.instance();
+    }
+  }
+  
+  private ContentInNotLive() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ContentInNotLive instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ContentInNotLive.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ContentInNotLive.Matcher.on(engine);
+  }
+  
+  @Override
+  public ContentInNotLive.Matcher instantiate() {
+    return ContentInNotLive.Matcher.create();
+  }
+  
+  @Override
+  public ContentInNotLive.Match newEmptyMatch() {
+    return ContentInNotLive.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ContentInNotLive.Match newMatch(final Object... parameters) {
+    return ContentInNotLive.Match.newMatch((hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.Dir) parameters[0], (hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ContentInNotLive} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ContentInNotLive#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ContentInNotLive INSTANCE = new ContentInNotLive();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ContentInNotLive.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_parent = new PParameter("parent", "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.Dir", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("FS", "Dir")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_child = new PParameter("child", "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("FS", "FSObject")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_parent, parameter_child);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.contentInNotLive";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("parent","child");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_parent = body.getOrCreateVariableByName("parent");
+          PVariable var_child = body.getOrCreateVariableByName("child");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_parent), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_child), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_parent, parameter_parent),
+             new ExportedParameter(body, var_child, parameter_child)
+          ));
+          //    Dir.contents(parent,child)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_parent), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_parent, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("FS", "Dir", "contents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          new Equality(body, var__virtual_0_, var_child);
+          //    neg find live(_,parent)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var___0_, var_parent), Live.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PBody body = new PBody(this);
+          PVariable var_parent = body.getOrCreateVariableByName("parent");
+          PVariable var_child = body.getOrCreateVariableByName("child");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_parent), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_child), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_parent, parameter_parent),
+             new ExportedParameter(body, var_child, parameter_child)
+          ));
+          //    Dir.contents(parent,child)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_parent), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_parent, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("FS", "Dir", "contents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          new Equality(body, var__virtual_0_, var_child);
+          //    neg find live(_,child)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var___0_, var_child), Live.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("child")
+                              }));
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("message", "error");
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/DirectSupertype.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/DirectSupertype.java
new file mode 100644
index 00000000..72c31e34
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/DirectSupertype.java
@@ -0,0 +1,703 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Ecore.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern directSupertype(a: EClass, b:EClass) {
+ *              EClass.eSuperTypes(a,b);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class DirectSupertype extends BaseGeneratedEMFQuerySpecification<DirectSupertype.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.directSupertype pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private EClass fA;
+    
+    private EClass fB;
+    
+    private static List<String> parameterNames = makeImmutableList("a", "b");
+    
+    private Match(final EClass pA, final EClass pB) {
+      this.fA = pA;
+      this.fB = pB;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "a": return this.fA;
+          case "b": return this.fB;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fA;
+          case 1: return this.fB;
+          default: return null;
+      }
+    }
+    
+    public EClass getA() {
+      return this.fA;
+    }
+    
+    public EClass getB() {
+      return this.fB;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("a".equals(parameterName) ) {
+          this.fA = (EClass) newValue;
+          return true;
+      }
+      if ("b".equals(parameterName) ) {
+          this.fB = (EClass) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setA(final EClass pA) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fA = pA;
+    }
+    
+    public void setB(final EClass pB) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fB = pB;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.directSupertype";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return DirectSupertype.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fA, fB};
+    }
+    
+    @Override
+    public DirectSupertype.Match toImmutable() {
+      return isMutable() ? newMatch(fA, fB) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"a\"=" + prettyPrintValue(fA) + ", ");
+      result.append("\"b\"=" + prettyPrintValue(fB));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fA, fB);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof DirectSupertype.Match)) {
+          DirectSupertype.Match other = (DirectSupertype.Match) obj;
+          return Objects.equals(fA, other.fA) && Objects.equals(fB, other.fB);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public DirectSupertype specification() {
+      return DirectSupertype.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static DirectSupertype.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static DirectSupertype.Match newMutableMatch(final EClass pA, final EClass pB) {
+      return new Mutable(pA, pB);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static DirectSupertype.Match newMatch(final EClass pA, final EClass pB) {
+      return new Immutable(pA, pB);
+    }
+    
+    private static final class Mutable extends DirectSupertype.Match {
+      Mutable(final EClass pA, final EClass pB) {
+        super(pA, pB);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends DirectSupertype.Match {
+      Immutable(final EClass pA, final EClass pB) {
+        super(pA, pB);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.directSupertype pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern directSupertype(a: EClass, b:EClass) {
+   *    EClass.eSuperTypes(a,b);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see DirectSupertype
+   * 
+   */
+  public static class Matcher extends BaseMatcher<DirectSupertype.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static DirectSupertype.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static DirectSupertype.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_A = 0;
+    
+    private static final int POSITION_B = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(DirectSupertype.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<DirectSupertype.Match> getAllMatches(final EClass pA, final EClass pB) {
+      return rawStreamAllMatches(new Object[]{pA, pB}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<DirectSupertype.Match> streamAllMatches(final EClass pA, final EClass pB) {
+      return rawStreamAllMatches(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<DirectSupertype.Match> getOneArbitraryMatch(final EClass pA, final EClass pB) {
+      return rawGetOneArbitraryMatch(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final EClass pA, final EClass pB) {
+      return rawHasMatch(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final EClass pA, final EClass pB) {
+      return rawCountMatches(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final EClass pA, final EClass pB, final Consumer<? super DirectSupertype.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pA, pB}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public DirectSupertype.Match newMatch(final EClass pA, final EClass pB) {
+      return DirectSupertype.Match.newMatch(pA, pB);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EClass> rawStreamAllValuesOfa(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_A, parameters).map(EClass.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfa(final DirectSupertype.Match partialMatch) {
+      return rawStreamAllValuesOfa(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfa(final EClass pB) {
+      return rawStreamAllValuesOfa(new Object[]{null, pB});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfa(final DirectSupertype.Match partialMatch) {
+      return rawStreamAllValuesOfa(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfa(final EClass pB) {
+      return rawStreamAllValuesOfa(new Object[]{null, pB}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EClass> rawStreamAllValuesOfb(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_B, parameters).map(EClass.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfb() {
+      return rawStreamAllValuesOfb(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfb() {
+      return rawStreamAllValuesOfb(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfb(final DirectSupertype.Match partialMatch) {
+      return rawStreamAllValuesOfb(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfb(final EClass pA) {
+      return rawStreamAllValuesOfb(new Object[]{pA, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfb(final DirectSupertype.Match partialMatch) {
+      return rawStreamAllValuesOfb(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfb(final EClass pA) {
+      return rawStreamAllValuesOfb(new Object[]{pA, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected DirectSupertype.Match tupleToMatch(final Tuple t) {
+      try {
+          return DirectSupertype.Match.newMatch((EClass) t.get(POSITION_A), (EClass) t.get(POSITION_B));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected DirectSupertype.Match arrayToMatch(final Object[] match) {
+      try {
+          return DirectSupertype.Match.newMatch((EClass) match[POSITION_A], (EClass) match[POSITION_B]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected DirectSupertype.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return DirectSupertype.Match.newMutableMatch((EClass) match[POSITION_A], (EClass) match[POSITION_B]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<DirectSupertype.Matcher> querySpecification() {
+      return DirectSupertype.instance();
+    }
+  }
+  
+  private DirectSupertype() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static DirectSupertype instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected DirectSupertype.Matcher instantiate(final ViatraQueryEngine engine) {
+    return DirectSupertype.Matcher.on(engine);
+  }
+  
+  @Override
+  public DirectSupertype.Matcher instantiate() {
+    return DirectSupertype.Matcher.create();
+  }
+  
+  @Override
+  public DirectSupertype.Match newEmptyMatch() {
+    return DirectSupertype.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public DirectSupertype.Match newMatch(final Object... parameters) {
+    return DirectSupertype.Match.newMatch((org.eclipse.emf.ecore.EClass) parameters[0], (org.eclipse.emf.ecore.EClass) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link DirectSupertype} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link DirectSupertype#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final DirectSupertype INSTANCE = new DirectSupertype();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final DirectSupertype.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_a = new PParameter("a", "org.eclipse.emf.ecore.EClass", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EClass")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_b = new PParameter("b", "org.eclipse.emf.ecore.EClass", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EClass")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_a, parameter_b);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.directSupertype";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("a","b");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_a = body.getOrCreateVariableByName("a");
+          PVariable var_b = body.getOrCreateVariableByName("b");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_b), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_a, parameter_a),
+             new ExportedParameter(body, var_b, parameter_b)
+          ));
+          //    EClass.eSuperTypes(a,b)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass", "eSuperTypes")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass")));
+          new Equality(body, var__virtual_0_, var_b);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Live.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Live.java
new file mode 100644
index 00000000..3f2448aa
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Live.java
@@ -0,0 +1,741 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/FileSystem.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject;
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FileSystem;
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.PatternContent;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.BinaryTransitiveClosure;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}QueryBasedFeature
+ *         pattern live(this: FileSystem, l: FSObject) {
+ *              FileSystem.root(this,l);
+ *         } or {
+ *              FileSystem.root(this,root);
+ *              find patternContent+(root,l);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Live extends BaseGeneratedEMFQuerySpecification<Live.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private FileSystem fThis;
+    
+    private FSObject fL;
+    
+    private static List<String> parameterNames = makeImmutableList("this", "l");
+    
+    private Match(final FileSystem pThis, final FSObject pL) {
+      this.fThis = pThis;
+      this.fL = pL;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "this": return this.fThis;
+          case "l": return this.fL;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fThis;
+          case 1: return this.fL;
+          default: return null;
+      }
+    }
+    
+    public FileSystem getThis() {
+      return this.fThis;
+    }
+    
+    public FSObject getL() {
+      return this.fL;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("this".equals(parameterName) ) {
+          this.fThis = (FileSystem) newValue;
+          return true;
+      }
+      if ("l".equals(parameterName) ) {
+          this.fL = (FSObject) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setThis(final FileSystem pThis) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fThis = pThis;
+    }
+    
+    public void setL(final FSObject pL) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fL = pL;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Live.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fThis, fL};
+    }
+    
+    @Override
+    public Live.Match toImmutable() {
+      return isMutable() ? newMatch(fThis, fL) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"this\"=" + prettyPrintValue(fThis) + ", ");
+      result.append("\"l\"=" + prettyPrintValue(fL));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fThis, fL);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Live.Match)) {
+          Live.Match other = (Live.Match) obj;
+          return Objects.equals(fThis, other.fThis) && Objects.equals(fL, other.fL);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Live specification() {
+      return Live.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Live.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Live.Match newMutableMatch(final FileSystem pThis, final FSObject pL) {
+      return new Mutable(pThis, pL);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Live.Match newMatch(final FileSystem pThis, final FSObject pL) {
+      return new Immutable(pThis, pL);
+    }
+    
+    private static final class Mutable extends Live.Match {
+      Mutable(final FileSystem pThis, final FSObject pL) {
+        super(pThis, pL);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Live.Match {
+      Immutable(final FileSystem pThis, final FSObject pL) {
+        super(pThis, pL);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}QueryBasedFeature
+   * pattern live(this: FileSystem, l: FSObject) {
+   *    FileSystem.root(this,l);
+   * } or {
+   *    FileSystem.root(this,root);
+   *    find patternContent+(root,l);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Live
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Live.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Live.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Live.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_THIS = 0;
+    
+    private static final int POSITION_L = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Live.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Live.Match> getAllMatches(final FileSystem pThis, final FSObject pL) {
+      return rawStreamAllMatches(new Object[]{pThis, pL}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Live.Match> streamAllMatches(final FileSystem pThis, final FSObject pL) {
+      return rawStreamAllMatches(new Object[]{pThis, pL});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Live.Match> getOneArbitraryMatch(final FileSystem pThis, final FSObject pL) {
+      return rawGetOneArbitraryMatch(new Object[]{pThis, pL});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final FileSystem pThis, final FSObject pL) {
+      return rawHasMatch(new Object[]{pThis, pL});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final FileSystem pThis, final FSObject pL) {
+      return rawCountMatches(new Object[]{pThis, pL});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final FileSystem pThis, final FSObject pL, final Consumer<? super Live.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pThis, pL}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pThis the fixed value of pattern parameter this, or null if not bound.
+     * @param pL the fixed value of pattern parameter l, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Live.Match newMatch(final FileSystem pThis, final FSObject pL) {
+      return Live.Match.newMatch(pThis, pL);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<FileSystem> rawStreamAllValuesOfthis(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_THIS, parameters).map(FileSystem.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FileSystem> getAllValuesOfthis() {
+      return rawStreamAllValuesOfthis(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FileSystem> streamAllValuesOfthis() {
+      return rawStreamAllValuesOfthis(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FileSystem> streamAllValuesOfthis(final Live.Match partialMatch) {
+      return rawStreamAllValuesOfthis(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FileSystem> streamAllValuesOfthis(final FSObject pL) {
+      return rawStreamAllValuesOfthis(new Object[]{null, pL});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FileSystem> getAllValuesOfthis(final Live.Match partialMatch) {
+      return rawStreamAllValuesOfthis(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for this.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FileSystem> getAllValuesOfthis(final FSObject pL) {
+      return rawStreamAllValuesOfthis(new Object[]{null, pL}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<FSObject> rawStreamAllValuesOfl(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_L, parameters).map(FSObject.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfl() {
+      return rawStreamAllValuesOfl(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfl() {
+      return rawStreamAllValuesOfl(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfl(final Live.Match partialMatch) {
+      return rawStreamAllValuesOfl(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfl(final FileSystem pThis) {
+      return rawStreamAllValuesOfl(new Object[]{pThis, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfl(final Live.Match partialMatch) {
+      return rawStreamAllValuesOfl(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for l.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfl(final FileSystem pThis) {
+      return rawStreamAllValuesOfl(new Object[]{pThis, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected Live.Match tupleToMatch(final Tuple t) {
+      try {
+          return Live.Match.newMatch((FileSystem) t.get(POSITION_THIS), (FSObject) t.get(POSITION_L));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Live.Match arrayToMatch(final Object[] match) {
+      try {
+          return Live.Match.newMatch((FileSystem) match[POSITION_THIS], (FSObject) match[POSITION_L]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Live.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Live.Match.newMutableMatch((FileSystem) match[POSITION_THIS], (FSObject) match[POSITION_L]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Live.Matcher> querySpecification() {
+      return Live.instance();
+    }
+  }
+  
+  private Live() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Live instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Live.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Live.Matcher.on(engine);
+  }
+  
+  @Override
+  public Live.Matcher instantiate() {
+    return Live.Matcher.create();
+  }
+  
+  @Override
+  public Live.Match newEmptyMatch() {
+    return Live.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Live.Match newMatch(final Object... parameters) {
+    return Live.Match.newMatch((hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FileSystem) parameters[0], (hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Live} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Live#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Live INSTANCE = new Live();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Live.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_this = new PParameter("this", "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FileSystem", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("FS", "FileSystem")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_l = new PParameter("l", "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("FS", "FSObject")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_this, parameter_l);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.live";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("this","l");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_this = body.getOrCreateVariableByName("this");
+          PVariable var_l = body.getOrCreateVariableByName("l");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_this), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FileSystem")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_l), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_this, parameter_this),
+             new ExportedParameter(body, var_l, parameter_l)
+          ));
+          //    FileSystem.root(this,l)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_this), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FileSystem")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_this, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("FS", "FileSystem", "root")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          new Equality(body, var__virtual_0_, var_l);
+          bodies.add(body);
+      }
+      {
+          PBody body = new PBody(this);
+          PVariable var_this = body.getOrCreateVariableByName("this");
+          PVariable var_l = body.getOrCreateVariableByName("l");
+          PVariable var_root = body.getOrCreateVariableByName("root");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_this), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FileSystem")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_l), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_this, parameter_this),
+             new ExportedParameter(body, var_l, parameter_l)
+          ));
+          //    FileSystem.root(this,root)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_this), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FileSystem")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_this, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("FS", "FileSystem", "root")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          new Equality(body, var__virtual_0_, var_root);
+          //    find patternContent+(root,l)
+          new BinaryTransitiveClosure(body, Tuples.flatTupleOf(var_root, var_l), PatternContent.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("QueryBasedFeature");
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/LoopInInheritence.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/LoopInInheritence.java
new file mode 100644
index 00000000..f81b989c
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/LoopInInheritence.java
@@ -0,0 +1,558 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Ecore.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.DirectSupertype;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.BinaryTransitiveClosure;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(key={a}, severity="error", message="error")
+ *         pattern loopInInheritence(a: EClass) {
+ *              find directSupertype+(a,a);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class LoopInInheritence extends BaseGeneratedEMFQuerySpecification<LoopInInheritence.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.loopInInheritence pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private EClass fA;
+    
+    private static List<String> parameterNames = makeImmutableList("a");
+    
+    private Match(final EClass pA) {
+      this.fA = pA;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "a": return this.fA;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fA;
+          default: return null;
+      }
+    }
+    
+    public EClass getA() {
+      return this.fA;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("a".equals(parameterName) ) {
+          this.fA = (EClass) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setA(final EClass pA) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fA = pA;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.loopInInheritence";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return LoopInInheritence.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fA};
+    }
+    
+    @Override
+    public LoopInInheritence.Match toImmutable() {
+      return isMutable() ? newMatch(fA) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"a\"=" + prettyPrintValue(fA));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fA);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof LoopInInheritence.Match)) {
+          LoopInInheritence.Match other = (LoopInInheritence.Match) obj;
+          return Objects.equals(fA, other.fA);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public LoopInInheritence specification() {
+      return LoopInInheritence.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static LoopInInheritence.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static LoopInInheritence.Match newMutableMatch(final EClass pA) {
+      return new Mutable(pA);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static LoopInInheritence.Match newMatch(final EClass pA) {
+      return new Immutable(pA);
+    }
+    
+    private static final class Mutable extends LoopInInheritence.Match {
+      Mutable(final EClass pA) {
+        super(pA);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends LoopInInheritence.Match {
+      Immutable(final EClass pA) {
+        super(pA);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.loopInInheritence pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(key={a}, severity="error", message="error")
+   * pattern loopInInheritence(a: EClass) {
+   *    find directSupertype+(a,a);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see LoopInInheritence
+   * 
+   */
+  public static class Matcher extends BaseMatcher<LoopInInheritence.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static LoopInInheritence.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static LoopInInheritence.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_A = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(LoopInInheritence.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<LoopInInheritence.Match> getAllMatches(final EClass pA) {
+      return rawStreamAllMatches(new Object[]{pA}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<LoopInInheritence.Match> streamAllMatches(final EClass pA) {
+      return rawStreamAllMatches(new Object[]{pA});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<LoopInInheritence.Match> getOneArbitraryMatch(final EClass pA) {
+      return rawGetOneArbitraryMatch(new Object[]{pA});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final EClass pA) {
+      return rawHasMatch(new Object[]{pA});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final EClass pA) {
+      return rawCountMatches(new Object[]{pA});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final EClass pA, final Consumer<? super LoopInInheritence.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pA}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public LoopInInheritence.Match newMatch(final EClass pA) {
+      return LoopInInheritence.Match.newMatch(pA);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EClass> rawStreamAllValuesOfa(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_A, parameters).map(EClass.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EClass> getAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EClass> streamAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray());
+    }
+    
+    @Override
+    protected LoopInInheritence.Match tupleToMatch(final Tuple t) {
+      try {
+          return LoopInInheritence.Match.newMatch((EClass) t.get(POSITION_A));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected LoopInInheritence.Match arrayToMatch(final Object[] match) {
+      try {
+          return LoopInInheritence.Match.newMatch((EClass) match[POSITION_A]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected LoopInInheritence.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return LoopInInheritence.Match.newMutableMatch((EClass) match[POSITION_A]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<LoopInInheritence.Matcher> querySpecification() {
+      return LoopInInheritence.instance();
+    }
+  }
+  
+  private LoopInInheritence() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static LoopInInheritence instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected LoopInInheritence.Matcher instantiate(final ViatraQueryEngine engine) {
+    return LoopInInheritence.Matcher.on(engine);
+  }
+  
+  @Override
+  public LoopInInheritence.Matcher instantiate() {
+    return LoopInInheritence.Matcher.create();
+  }
+  
+  @Override
+  public LoopInInheritence.Match newEmptyMatch() {
+    return LoopInInheritence.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public LoopInInheritence.Match newMatch(final Object... parameters) {
+    return LoopInInheritence.Match.newMatch((org.eclipse.emf.ecore.EClass) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link LoopInInheritence} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link LoopInInheritence#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final LoopInInheritence INSTANCE = new LoopInInheritence();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final LoopInInheritence.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_a = new PParameter("a", "org.eclipse.emf.ecore.EClass", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EClass")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_a);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.loopInInheritence";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("a");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_a = body.getOrCreateVariableByName("a");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_a, parameter_a)
+          ));
+          //    find directSupertype+(a,a)
+          new BinaryTransitiveClosure(body, Tuples.flatTupleOf(var_a, var_a), DirectSupertype.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("a")
+                              }));
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("message", "error");
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/NonSymmetricOpposite.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/NonSymmetricOpposite.java
new file mode 100644
index 00000000..53725305
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/NonSymmetricOpposite.java
@@ -0,0 +1,718 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Ecore.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Opposite;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(key={a}, severity="error", message="error")
+ *         pattern nonSymmetricOpposite(a:EReference, b:EReference) {
+ *              find opposite(a,b);
+ *              neg find opposite(b,a);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class NonSymmetricOpposite extends BaseGeneratedEMFQuerySpecification<NonSymmetricOpposite.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.nonSymmetricOpposite pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private EReference fA;
+    
+    private EReference fB;
+    
+    private static List<String> parameterNames = makeImmutableList("a", "b");
+    
+    private Match(final EReference pA, final EReference pB) {
+      this.fA = pA;
+      this.fB = pB;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "a": return this.fA;
+          case "b": return this.fB;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fA;
+          case 1: return this.fB;
+          default: return null;
+      }
+    }
+    
+    public EReference getA() {
+      return this.fA;
+    }
+    
+    public EReference getB() {
+      return this.fB;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("a".equals(parameterName) ) {
+          this.fA = (EReference) newValue;
+          return true;
+      }
+      if ("b".equals(parameterName) ) {
+          this.fB = (EReference) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setA(final EReference pA) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fA = pA;
+    }
+    
+    public void setB(final EReference pB) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fB = pB;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.nonSymmetricOpposite";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return NonSymmetricOpposite.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fA, fB};
+    }
+    
+    @Override
+    public NonSymmetricOpposite.Match toImmutable() {
+      return isMutable() ? newMatch(fA, fB) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"a\"=" + prettyPrintValue(fA) + ", ");
+      result.append("\"b\"=" + prettyPrintValue(fB));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fA, fB);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof NonSymmetricOpposite.Match)) {
+          NonSymmetricOpposite.Match other = (NonSymmetricOpposite.Match) obj;
+          return Objects.equals(fA, other.fA) && Objects.equals(fB, other.fB);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public NonSymmetricOpposite specification() {
+      return NonSymmetricOpposite.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static NonSymmetricOpposite.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static NonSymmetricOpposite.Match newMutableMatch(final EReference pA, final EReference pB) {
+      return new Mutable(pA, pB);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static NonSymmetricOpposite.Match newMatch(final EReference pA, final EReference pB) {
+      return new Immutable(pA, pB);
+    }
+    
+    private static final class Mutable extends NonSymmetricOpposite.Match {
+      Mutable(final EReference pA, final EReference pB) {
+        super(pA, pB);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends NonSymmetricOpposite.Match {
+      Immutable(final EReference pA, final EReference pB) {
+        super(pA, pB);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.nonSymmetricOpposite pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(key={a}, severity="error", message="error")
+   * pattern nonSymmetricOpposite(a:EReference, b:EReference) {
+   *    find opposite(a,b);
+   *    neg find opposite(b,a);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see NonSymmetricOpposite
+   * 
+   */
+  public static class Matcher extends BaseMatcher<NonSymmetricOpposite.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static NonSymmetricOpposite.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static NonSymmetricOpposite.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_A = 0;
+    
+    private static final int POSITION_B = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(NonSymmetricOpposite.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<NonSymmetricOpposite.Match> getAllMatches(final EReference pA, final EReference pB) {
+      return rawStreamAllMatches(new Object[]{pA, pB}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<NonSymmetricOpposite.Match> streamAllMatches(final EReference pA, final EReference pB) {
+      return rawStreamAllMatches(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<NonSymmetricOpposite.Match> getOneArbitraryMatch(final EReference pA, final EReference pB) {
+      return rawGetOneArbitraryMatch(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final EReference pA, final EReference pB) {
+      return rawHasMatch(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final EReference pA, final EReference pB) {
+      return rawCountMatches(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final EReference pA, final EReference pB, final Consumer<? super NonSymmetricOpposite.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pA, pB}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public NonSymmetricOpposite.Match newMatch(final EReference pA, final EReference pB) {
+      return NonSymmetricOpposite.Match.newMatch(pA, pB);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EReference> rawStreamAllValuesOfa(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_A, parameters).map(EReference.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa(final NonSymmetricOpposite.Match partialMatch) {
+      return rawStreamAllValuesOfa(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa(final EReference pB) {
+      return rawStreamAllValuesOfa(new Object[]{null, pB});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa(final NonSymmetricOpposite.Match partialMatch) {
+      return rawStreamAllValuesOfa(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa(final EReference pB) {
+      return rawStreamAllValuesOfa(new Object[]{null, pB}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EReference> rawStreamAllValuesOfb(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_B, parameters).map(EReference.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfb() {
+      return rawStreamAllValuesOfb(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfb() {
+      return rawStreamAllValuesOfb(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfb(final NonSymmetricOpposite.Match partialMatch) {
+      return rawStreamAllValuesOfb(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfb(final EReference pA) {
+      return rawStreamAllValuesOfb(new Object[]{pA, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfb(final NonSymmetricOpposite.Match partialMatch) {
+      return rawStreamAllValuesOfb(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfb(final EReference pA) {
+      return rawStreamAllValuesOfb(new Object[]{pA, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected NonSymmetricOpposite.Match tupleToMatch(final Tuple t) {
+      try {
+          return NonSymmetricOpposite.Match.newMatch((EReference) t.get(POSITION_A), (EReference) t.get(POSITION_B));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected NonSymmetricOpposite.Match arrayToMatch(final Object[] match) {
+      try {
+          return NonSymmetricOpposite.Match.newMatch((EReference) match[POSITION_A], (EReference) match[POSITION_B]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected NonSymmetricOpposite.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return NonSymmetricOpposite.Match.newMutableMatch((EReference) match[POSITION_A], (EReference) match[POSITION_B]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<NonSymmetricOpposite.Matcher> querySpecification() {
+      return NonSymmetricOpposite.instance();
+    }
+  }
+  
+  private NonSymmetricOpposite() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static NonSymmetricOpposite instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected NonSymmetricOpposite.Matcher instantiate(final ViatraQueryEngine engine) {
+    return NonSymmetricOpposite.Matcher.on(engine);
+  }
+  
+  @Override
+  public NonSymmetricOpposite.Matcher instantiate() {
+    return NonSymmetricOpposite.Matcher.create();
+  }
+  
+  @Override
+  public NonSymmetricOpposite.Match newEmptyMatch() {
+    return NonSymmetricOpposite.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public NonSymmetricOpposite.Match newMatch(final Object... parameters) {
+    return NonSymmetricOpposite.Match.newMatch((org.eclipse.emf.ecore.EReference) parameters[0], (org.eclipse.emf.ecore.EReference) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link NonSymmetricOpposite} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link NonSymmetricOpposite#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final NonSymmetricOpposite INSTANCE = new NonSymmetricOpposite();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final NonSymmetricOpposite.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_a = new PParameter("a", "org.eclipse.emf.ecore.EReference", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EReference")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_b = new PParameter("b", "org.eclipse.emf.ecore.EReference", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EReference")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_a, parameter_b);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.nonSymmetricOpposite";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("a","b");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_a = body.getOrCreateVariableByName("a");
+          PVariable var_b = body.getOrCreateVariableByName("b");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_b), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_a, parameter_a),
+             new ExportedParameter(body, var_b, parameter_b)
+          ));
+          //    find opposite(a,b)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_a, var_b), Opposite.instance().getInternalQueryRepresentation());
+          //    neg find opposite(b,a)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_b, var_a), Opposite.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("a")
+                              }));
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("message", "error");
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Opposite.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Opposite.java
new file mode 100644
index 00000000..7689d070
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Opposite.java
@@ -0,0 +1,704 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Ecore.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern opposite(a:EReference, b: EReference) {
+ *              EReference.eOpposite(a,b);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Opposite extends BaseGeneratedEMFQuerySpecification<Opposite.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.opposite pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private EReference fA;
+    
+    private EReference fB;
+    
+    private static List<String> parameterNames = makeImmutableList("a", "b");
+    
+    private Match(final EReference pA, final EReference pB) {
+      this.fA = pA;
+      this.fB = pB;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "a": return this.fA;
+          case "b": return this.fB;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fA;
+          case 1: return this.fB;
+          default: return null;
+      }
+    }
+    
+    public EReference getA() {
+      return this.fA;
+    }
+    
+    public EReference getB() {
+      return this.fB;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("a".equals(parameterName) ) {
+          this.fA = (EReference) newValue;
+          return true;
+      }
+      if ("b".equals(parameterName) ) {
+          this.fB = (EReference) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setA(final EReference pA) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fA = pA;
+    }
+    
+    public void setB(final EReference pB) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fB = pB;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.opposite";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Opposite.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fA, fB};
+    }
+    
+    @Override
+    public Opposite.Match toImmutable() {
+      return isMutable() ? newMatch(fA, fB) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"a\"=" + prettyPrintValue(fA) + ", ");
+      result.append("\"b\"=" + prettyPrintValue(fB));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fA, fB);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Opposite.Match)) {
+          Opposite.Match other = (Opposite.Match) obj;
+          return Objects.equals(fA, other.fA) && Objects.equals(fB, other.fB);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Opposite specification() {
+      return Opposite.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Opposite.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Opposite.Match newMutableMatch(final EReference pA, final EReference pB) {
+      return new Mutable(pA, pB);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Opposite.Match newMatch(final EReference pA, final EReference pB) {
+      return new Immutable(pA, pB);
+    }
+    
+    private static final class Mutable extends Opposite.Match {
+      Mutable(final EReference pA, final EReference pB) {
+        super(pA, pB);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Opposite.Match {
+      Immutable(final EReference pA, final EReference pB) {
+        super(pA, pB);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.opposite pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern opposite(a:EReference, b: EReference) {
+   *    EReference.eOpposite(a,b);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Opposite
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Opposite.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Opposite.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Opposite.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_A = 0;
+    
+    private static final int POSITION_B = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Opposite.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Opposite.Match> getAllMatches(final EReference pA, final EReference pB) {
+      return rawStreamAllMatches(new Object[]{pA, pB}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Opposite.Match> streamAllMatches(final EReference pA, final EReference pB) {
+      return rawStreamAllMatches(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Opposite.Match> getOneArbitraryMatch(final EReference pA, final EReference pB) {
+      return rawGetOneArbitraryMatch(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final EReference pA, final EReference pB) {
+      return rawHasMatch(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final EReference pA, final EReference pB) {
+      return rawCountMatches(new Object[]{pA, pB});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final EReference pA, final EReference pB, final Consumer<? super Opposite.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pA, pB}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param pB the fixed value of pattern parameter b, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Opposite.Match newMatch(final EReference pA, final EReference pB) {
+      return Opposite.Match.newMatch(pA, pB);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EReference> rawStreamAllValuesOfa(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_A, parameters).map(EReference.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa(final Opposite.Match partialMatch) {
+      return rawStreamAllValuesOfa(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa(final EReference pB) {
+      return rawStreamAllValuesOfa(new Object[]{null, pB});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa(final Opposite.Match partialMatch) {
+      return rawStreamAllValuesOfa(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa(final EReference pB) {
+      return rawStreamAllValuesOfa(new Object[]{null, pB}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EReference> rawStreamAllValuesOfb(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_B, parameters).map(EReference.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfb() {
+      return rawStreamAllValuesOfb(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfb() {
+      return rawStreamAllValuesOfb(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfb(final Opposite.Match partialMatch) {
+      return rawStreamAllValuesOfb(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfb(final EReference pA) {
+      return rawStreamAllValuesOfb(new Object[]{pA, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfb(final Opposite.Match partialMatch) {
+      return rawStreamAllValuesOfb(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for b.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfb(final EReference pA) {
+      return rawStreamAllValuesOfb(new Object[]{pA, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected Opposite.Match tupleToMatch(final Tuple t) {
+      try {
+          return Opposite.Match.newMatch((EReference) t.get(POSITION_A), (EReference) t.get(POSITION_B));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Opposite.Match arrayToMatch(final Object[] match) {
+      try {
+          return Opposite.Match.newMatch((EReference) match[POSITION_A], (EReference) match[POSITION_B]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Opposite.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Opposite.Match.newMutableMatch((EReference) match[POSITION_A], (EReference) match[POSITION_B]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Opposite.Matcher> querySpecification() {
+      return Opposite.instance();
+    }
+  }
+  
+  private Opposite() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Opposite instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Opposite.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Opposite.Matcher.on(engine);
+  }
+  
+  @Override
+  public Opposite.Matcher instantiate() {
+    return Opposite.Matcher.create();
+  }
+  
+  @Override
+  public Opposite.Match newEmptyMatch() {
+    return Opposite.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Opposite.Match newMatch(final Object... parameters) {
+    return Opposite.Match.newMatch((org.eclipse.emf.ecore.EReference) parameters[0], (org.eclipse.emf.ecore.EReference) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Opposite} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Opposite#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Opposite INSTANCE = new Opposite();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Opposite.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_a = new PParameter("a", "org.eclipse.emf.ecore.EReference", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EReference")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_b = new PParameter("b", "org.eclipse.emf.ecore.EReference", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EReference")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_a, parameter_b);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.opposite";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("a","b");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_a = body.getOrCreateVariableByName("a");
+          PVariable var_b = body.getOrCreateVariableByName("b");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_b), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_a, parameter_a),
+             new ExportedParameter(body, var_b, parameter_b)
+          ));
+          //    EReference.eOpposite(a,b)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference", "eOpposite")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          new Equality(body, var__virtual_0_, var_b);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/OppositeDifferentClass.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/OppositeDifferentClass.java
new file mode 100644
index 00000000..aca12eca
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/OppositeDifferentClass.java
@@ -0,0 +1,587 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/Ecore.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(key={a}, severity="error", message="error")
+ *         pattern oppositeDifferentClass(a:EReference) {
+ *              EReference.eOpposite(a,b);
+ *              EReference.eContainingClass(a,aContaining);
+ *              EReference.eType(b,bTarget);
+ *              aContaining != bTarget;
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class OppositeDifferentClass extends BaseGeneratedEMFQuerySpecification<OppositeDifferentClass.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.oppositeDifferentClass pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private EReference fA;
+    
+    private static List<String> parameterNames = makeImmutableList("a");
+    
+    private Match(final EReference pA) {
+      this.fA = pA;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "a": return this.fA;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fA;
+          default: return null;
+      }
+    }
+    
+    public EReference getA() {
+      return this.fA;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("a".equals(parameterName) ) {
+          this.fA = (EReference) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setA(final EReference pA) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fA = pA;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.oppositeDifferentClass";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return OppositeDifferentClass.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fA};
+    }
+    
+    @Override
+    public OppositeDifferentClass.Match toImmutable() {
+      return isMutable() ? newMatch(fA) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"a\"=" + prettyPrintValue(fA));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fA);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof OppositeDifferentClass.Match)) {
+          OppositeDifferentClass.Match other = (OppositeDifferentClass.Match) obj;
+          return Objects.equals(fA, other.fA);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public OppositeDifferentClass specification() {
+      return OppositeDifferentClass.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static OppositeDifferentClass.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static OppositeDifferentClass.Match newMutableMatch(final EReference pA) {
+      return new Mutable(pA);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static OppositeDifferentClass.Match newMatch(final EReference pA) {
+      return new Immutable(pA);
+    }
+    
+    private static final class Mutable extends OppositeDifferentClass.Match {
+      Mutable(final EReference pA) {
+        super(pA);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends OppositeDifferentClass.Match {
+      Immutable(final EReference pA) {
+        super(pA);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.oppositeDifferentClass pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(key={a}, severity="error", message="error")
+   * pattern oppositeDifferentClass(a:EReference) {
+   *    EReference.eOpposite(a,b);
+   *    EReference.eContainingClass(a,aContaining);
+   *    EReference.eType(b,bTarget);
+   *    aContaining != bTarget;
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see OppositeDifferentClass
+   * 
+   */
+  public static class Matcher extends BaseMatcher<OppositeDifferentClass.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static OppositeDifferentClass.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static OppositeDifferentClass.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_A = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(OppositeDifferentClass.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<OppositeDifferentClass.Match> getAllMatches(final EReference pA) {
+      return rawStreamAllMatches(new Object[]{pA}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<OppositeDifferentClass.Match> streamAllMatches(final EReference pA) {
+      return rawStreamAllMatches(new Object[]{pA});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<OppositeDifferentClass.Match> getOneArbitraryMatch(final EReference pA) {
+      return rawGetOneArbitraryMatch(new Object[]{pA});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final EReference pA) {
+      return rawHasMatch(new Object[]{pA});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final EReference pA) {
+      return rawCountMatches(new Object[]{pA});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final EReference pA, final Consumer<? super OppositeDifferentClass.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pA}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pA the fixed value of pattern parameter a, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public OppositeDifferentClass.Match newMatch(final EReference pA) {
+      return OppositeDifferentClass.Match.newMatch(pA);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<EReference> rawStreamAllValuesOfa(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_A, parameters).map(EReference.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<EReference> getAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for a.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<EReference> streamAllValuesOfa() {
+      return rawStreamAllValuesOfa(emptyArray());
+    }
+    
+    @Override
+    protected OppositeDifferentClass.Match tupleToMatch(final Tuple t) {
+      try {
+          return OppositeDifferentClass.Match.newMatch((EReference) t.get(POSITION_A));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected OppositeDifferentClass.Match arrayToMatch(final Object[] match) {
+      try {
+          return OppositeDifferentClass.Match.newMatch((EReference) match[POSITION_A]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected OppositeDifferentClass.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return OppositeDifferentClass.Match.newMutableMatch((EReference) match[POSITION_A]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<OppositeDifferentClass.Matcher> querySpecification() {
+      return OppositeDifferentClass.instance();
+    }
+  }
+  
+  private OppositeDifferentClass() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static OppositeDifferentClass instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected OppositeDifferentClass.Matcher instantiate(final ViatraQueryEngine engine) {
+    return OppositeDifferentClass.Matcher.on(engine);
+  }
+  
+  @Override
+  public OppositeDifferentClass.Matcher instantiate() {
+    return OppositeDifferentClass.Matcher.create();
+  }
+  
+  @Override
+  public OppositeDifferentClass.Match newEmptyMatch() {
+    return OppositeDifferentClass.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public OppositeDifferentClass.Match newMatch(final Object... parameters) {
+    return OppositeDifferentClass.Match.newMatch((org.eclipse.emf.ecore.EReference) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link OppositeDifferentClass} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link OppositeDifferentClass#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final OppositeDifferentClass INSTANCE = new OppositeDifferentClass();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final OppositeDifferentClass.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_a = new PParameter("a", "org.eclipse.emf.ecore.EReference", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.eclipse.org/emf/2002/Ecore", "EReference")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_a);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.oppositeDifferentClass";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("a");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_a = body.getOrCreateVariableByName("a");
+          PVariable var_b = body.getOrCreateVariableByName("b");
+          PVariable var_aContaining = body.getOrCreateVariableByName("aContaining");
+          PVariable var_bTarget = body.getOrCreateVariableByName("bTarget");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_a, parameter_a)
+          ));
+          //    EReference.eOpposite(a,b)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference", "eOpposite")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          new Equality(body, var__virtual_0_, var_b);
+          //    EReference.eContainingClass(a,aContaining)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_a, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.eclipse.org/emf/2002/Ecore", "EStructuralFeature", "eContainingClass")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClass")));
+          new Equality(body, var__virtual_1_, var_aContaining);
+          //    EReference.eType(b,bTarget)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_b), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EReference")));
+          PVariable var__virtual_2_ = body.getOrCreateVariableByName(".virtual{2}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_b, var__virtual_2_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.eclipse.org/emf/2002/Ecore", "ETypedElement", "eType")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_2_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EClassifier")));
+          new Equality(body, var__virtual_2_, var_bTarget);
+          //    aContaining != bTarget
+          new Inequality(body, var_aContaining, var_bTarget);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("a")
+                              }));
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("message", "error");
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/PatternContent.java b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/PatternContent.java
new file mode 100644
index 00000000..7c48b978
--- /dev/null
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/src-gen/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/PatternContent.java
@@ -0,0 +1,704 @@
+/**
+ * Generated from platform:/resource/hu.bme.mit.inf.dslreasoner.domains.alloyexamples/patterns/hu/bme/mit/inf/dslreasoner/domains/alloyexamples/FileSystem.vql
+ */
+package hu.bme.mit.inf.dslreasoner.domains.alloyexamples;
+
+import hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern patternContent(o1: FSObject, o2: FSObject) {
+ *              Dir.contents(o1,o2);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class PatternContent extends BaseGeneratedEMFQuerySpecification<PatternContent.Matcher> {
+  /**
+   * Pattern-specific match representation of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.patternContent pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private FSObject fO1;
+    
+    private FSObject fO2;
+    
+    private static List<String> parameterNames = makeImmutableList("o1", "o2");
+    
+    private Match(final FSObject pO1, final FSObject pO2) {
+      this.fO1 = pO1;
+      this.fO2 = pO2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "o1": return this.fO1;
+          case "o2": return this.fO2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fO1;
+          case 1: return this.fO2;
+          default: return null;
+      }
+    }
+    
+    public FSObject getO1() {
+      return this.fO1;
+    }
+    
+    public FSObject getO2() {
+      return this.fO2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("o1".equals(parameterName) ) {
+          this.fO1 = (FSObject) newValue;
+          return true;
+      }
+      if ("o2".equals(parameterName) ) {
+          this.fO2 = (FSObject) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setO1(final FSObject pO1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fO1 = pO1;
+    }
+    
+    public void setO2(final FSObject pO2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fO2 = pO2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.patternContent";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return PatternContent.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fO1, fO2};
+    }
+    
+    @Override
+    public PatternContent.Match toImmutable() {
+      return isMutable() ? newMatch(fO1, fO2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"o1\"=" + prettyPrintValue(fO1) + ", ");
+      result.append("\"o2\"=" + prettyPrintValue(fO2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fO1, fO2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof PatternContent.Match)) {
+          PatternContent.Match other = (PatternContent.Match) obj;
+          return Objects.equals(fO1, other.fO1) && Objects.equals(fO2, other.fO2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public PatternContent specification() {
+      return PatternContent.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static PatternContent.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static PatternContent.Match newMutableMatch(final FSObject pO1, final FSObject pO2) {
+      return new Mutable(pO1, pO2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static PatternContent.Match newMatch(final FSObject pO1, final FSObject pO2) {
+      return new Immutable(pO1, pO2);
+    }
+    
+    private static final class Mutable extends PatternContent.Match {
+      Mutable(final FSObject pO1, final FSObject pO2) {
+        super(pO1, pO2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends PatternContent.Match {
+      Immutable(final FSObject pO1, final FSObject pO2) {
+        super(pO1, pO2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the hu.bme.mit.inf.dslreasoner.domains.alloyexamples.patternContent pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern patternContent(o1: FSObject, o2: FSObject) {
+   *    Dir.contents(o1,o2);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see PatternContent
+   * 
+   */
+  public static class Matcher extends BaseMatcher<PatternContent.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static PatternContent.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static PatternContent.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_O1 = 0;
+    
+    private static final int POSITION_O2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(PatternContent.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<PatternContent.Match> getAllMatches(final FSObject pO1, final FSObject pO2) {
+      return rawStreamAllMatches(new Object[]{pO1, pO2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<PatternContent.Match> streamAllMatches(final FSObject pO1, final FSObject pO2) {
+      return rawStreamAllMatches(new Object[]{pO1, pO2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<PatternContent.Match> getOneArbitraryMatch(final FSObject pO1, final FSObject pO2) {
+      return rawGetOneArbitraryMatch(new Object[]{pO1, pO2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final FSObject pO1, final FSObject pO2) {
+      return rawHasMatch(new Object[]{pO1, pO2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final FSObject pO1, final FSObject pO2) {
+      return rawCountMatches(new Object[]{pO1, pO2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final FSObject pO1, final FSObject pO2, final Consumer<? super PatternContent.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pO1, pO2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pO1 the fixed value of pattern parameter o1, or null if not bound.
+     * @param pO2 the fixed value of pattern parameter o2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public PatternContent.Match newMatch(final FSObject pO1, final FSObject pO2) {
+      return PatternContent.Match.newMatch(pO1, pO2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<FSObject> rawStreamAllValuesOfo1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_O1, parameters).map(FSObject.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfo1() {
+      return rawStreamAllValuesOfo1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfo1() {
+      return rawStreamAllValuesOfo1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfo1(final PatternContent.Match partialMatch) {
+      return rawStreamAllValuesOfo1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfo1(final FSObject pO2) {
+      return rawStreamAllValuesOfo1(new Object[]{null, pO2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfo1(final PatternContent.Match partialMatch) {
+      return rawStreamAllValuesOfo1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfo1(final FSObject pO2) {
+      return rawStreamAllValuesOfo1(new Object[]{null, pO2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<FSObject> rawStreamAllValuesOfo2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_O2, parameters).map(FSObject.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfo2() {
+      return rawStreamAllValuesOfo2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfo2() {
+      return rawStreamAllValuesOfo2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfo2(final PatternContent.Match partialMatch) {
+      return rawStreamAllValuesOfo2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<FSObject> streamAllValuesOfo2(final FSObject pO1) {
+      return rawStreamAllValuesOfo2(new Object[]{pO1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfo2(final PatternContent.Match partialMatch) {
+      return rawStreamAllValuesOfo2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for o2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<FSObject> getAllValuesOfo2(final FSObject pO1) {
+      return rawStreamAllValuesOfo2(new Object[]{pO1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected PatternContent.Match tupleToMatch(final Tuple t) {
+      try {
+          return PatternContent.Match.newMatch((FSObject) t.get(POSITION_O1), (FSObject) t.get(POSITION_O2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected PatternContent.Match arrayToMatch(final Object[] match) {
+      try {
+          return PatternContent.Match.newMatch((FSObject) match[POSITION_O1], (FSObject) match[POSITION_O2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected PatternContent.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return PatternContent.Match.newMutableMatch((FSObject) match[POSITION_O1], (FSObject) match[POSITION_O2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<PatternContent.Matcher> querySpecification() {
+      return PatternContent.instance();
+    }
+  }
+  
+  private PatternContent() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static PatternContent instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected PatternContent.Matcher instantiate(final ViatraQueryEngine engine) {
+    return PatternContent.Matcher.on(engine);
+  }
+  
+  @Override
+  public PatternContent.Matcher instantiate() {
+    return PatternContent.Matcher.create();
+  }
+  
+  @Override
+  public PatternContent.Match newEmptyMatch() {
+    return PatternContent.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public PatternContent.Match newMatch(final Object... parameters) {
+    return PatternContent.Match.newMatch((hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject) parameters[0], (hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link PatternContent} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link PatternContent#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final PatternContent INSTANCE = new PatternContent();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final PatternContent.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_o1 = new PParameter("o1", "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("FS", "FSObject")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_o2 = new PParameter("o2", "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.Filesystem.FSObject", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("FS", "FSObject")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_o1, parameter_o2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "hu.bme.mit.inf.dslreasoner.domains.alloyexamples.patternContent";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("o1","o2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_o1 = body.getOrCreateVariableByName("o1");
+          PVariable var_o2 = body.getOrCreateVariableByName("o2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_o1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_o2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_o1, parameter_o1),
+             new ExportedParameter(body, var_o2, parameter_o2)
+          ));
+          //    Dir.contents(o1,o2)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_o1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "Dir")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_o1, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("FS", "Dir", "contents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("FS", "FSObject")));
+          new Equality(body, var__virtual_0_, var_o2);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/META-INF/MANIFEST.MF b/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/META-INF/MANIFEST.MF
index f15381b2..73ebb2c7 100644
--- a/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/META-INF/MANIFEST.MF
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/META-INF/MANIFEST.MF
@@ -6,16 +6,16 @@ Bundle-Version: 1.0.0.qualifier
 Bundle-ClassPath: .
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-Export-Package: hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm,

- hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm.impl,

- hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm.util,

- hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu,

- hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated,

- hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.util,

+Export-Package: hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm,
+ hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm.impl,
+ hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm.util,
+ hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu,
+ hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated,
+ hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.util,
  hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.util
-Require-Bundle: org.eclipse.viatra.query.runtime,

- org.eclipse.core.runtime,

- org.eclipse.emf.ecore;visibility:=reexport,

+Require-Bundle: org.eclipse.viatra.query.runtime,
+ org.eclipse.core.runtime,
+ org.eclipse.emf.ecore;visibility:=reexport,
  com.google.guava;bundle-version="15.0.0"
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-ActivationPolicy: lazy
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/plugin.xml b/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/plugin.xml
index 8069f168..993ec75d 100644
--- a/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/plugin.xml
+++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph/plugin.xml
@@ -1,103 +1,103 @@
-<?xml version="1.0" encoding="UTF-8"?><plugin>

-  <extension point="org.eclipse.emf.ecore.generated_package">

-    <!-- @generated yakindu_simplified -->

-    <package class="hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm.YakindummPackage" genModel="model/yakindu_simplified.genmodel" uri="hu.bme.mit.inf.yakindumm"/>

-  </extension>

-  <extension id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.Patterns" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.Patterns" id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.Patterns">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.entryInRegion"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.noEntryInRegion"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.multipleEntryInRegion"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.transition"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.incomingToEntry"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.noOutgoingTransitionFromEntry"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.multipleTransitionFromEntry"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.outgoingFromExit"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.outgoingFromFinal"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.noStateInRegion"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.StateInRegion"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.choiceHasNoOutgoing"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.choiceHasNoIncoming"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.synchHasNoOutgoing"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.synchHasNoIncoming"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.SynchronizedIncomingInSameRegion"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.notSynchronizingStates"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.hasMultipleOutgoingTrainsition"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.hasMultipleIncomingTrainsition"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.SynchronizedRegionsAreNotSiblings"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.child"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.SynchronizedRegionDoesNotHaveMultipleRegions"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.hasMultipleRegions"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.synchThree"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.twoSynch"/>

-    </group>

-  </extension>

-  <extension id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.Mutated" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.Mutated" id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.Mutated">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.entryInRegion_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.entryInRegion_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.entryInRegion_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M5"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M5"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_5"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M5"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromExit_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromExit_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromExit_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromFinal_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromFinal_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromFinal_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.StateInRegion_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.StateInRegion_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.StateInRegion_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M5"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M6"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M0"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M1"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M2"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M3"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M4"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M5"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M6"/>

-    </group>

-  </extension>

-</plugin>

+<?xml version="1.0" encoding="UTF-8"?><plugin>
+  <extension point="org.eclipse.emf.ecore.generated_package">
+    <!-- @generated yakindu_simplified -->
+    <package class="hu.bme.mit.inf.dslreasoner.domains.yakindu.sgraph.yakindumm.YakindummPackage" genModel="model/yakindu_simplified.genmodel" uri="hu.bme.mit.inf.yakindumm"/>
+  </extension>
+  <extension id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.Patterns" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.Patterns" id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.Patterns">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.entryInRegion"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.noEntryInRegion"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.multipleEntryInRegion"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.transition"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.incomingToEntry"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.noOutgoingTransitionFromEntry"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.multipleTransitionFromEntry"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.outgoingFromExit"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.outgoingFromFinal"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.noStateInRegion"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.StateInRegion"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.choiceHasNoOutgoing"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.choiceHasNoIncoming"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.synchHasNoOutgoing"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.synchHasNoIncoming"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.SynchronizedIncomingInSameRegion"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.notSynchronizingStates"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.hasMultipleOutgoingTrainsition"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.hasMultipleIncomingTrainsition"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.SynchronizedRegionsAreNotSiblings"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.child"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.SynchronizedRegionDoesNotHaveMultipleRegions"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.hasMultipleRegions"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.synchThree"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.twoSynch"/>
+    </group>
+  </extension>
+  <extension id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.Mutated" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.Mutated" id="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.Mutated">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.entryInRegion_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.entryInRegion_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.entryInRegion_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noEntryInRegion_M5"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleEntryInRegion_M5"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.transition_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.incomingToEntry_5"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noOutgoingTransitionFromEntry_M5"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.multipleTransitionFromEntry_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromExit_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromExit_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromExit_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromFinal_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromFinal_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.outgoingFromFinal_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.noStateInRegion_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.StateInRegion_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.StateInRegion_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.StateInRegion_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M5"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoOutgoing_M6"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M0"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M1"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M2"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M3"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M4"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M5"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.partialsnapshot_mavo.yakindu.mutated.choiceHasNoIncoming_M6"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Framework/hu.bme.mit.inf.dslreasoner.logic.model/plugin.xml b/Framework/hu.bme.mit.inf.dslreasoner.logic.model/plugin.xml
index 413002e2..bad09614 100644
--- a/Framework/hu.bme.mit.inf.dslreasoner.logic.model/plugin.xml
+++ b/Framework/hu.bme.mit.inf.dslreasoner.logic.model/plugin.xml
@@ -1,27 +1,27 @@
 <?xml version="1.0" encoding="UTF-8"?><?eclipse version="3.0"?><!--
---><plugin>

-  <extension point="org.eclipse.emf.ecore.generated_package">

-    <!-- @generated logiclanguage -->

-    <package class="hu.bme.mit.inf.dslreasoner.logic.model.logiclanguage.LogiclanguagePackage" genModel="model/logiclanguage.genmodel" uri="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language"/>

-  </extension>

-  <extension point="org.eclipse.emf.ecore.generated_package">

-    <!-- @generated logiclanguage -->

-    <package class="hu.bme.mit.inf.dslreasoner.logic.model.logicproblem.LogicproblemPackage" genModel="model/logiclanguage.genmodel" uri="http://www.bme.hu/mit/inf/dslreasoner/logic/model/problem"/>

-  </extension>

-  <extension point="org.eclipse.emf.ecore.generated_package">

-    <!-- @generated logiclanguage -->

-    <package class="hu.bme.mit.inf.dslreasoner.logic.model.logicresult.LogicresultPackage" genModel="model/logiclanguage.genmodel" uri="http://www.bme.hu/mit/inf/dslreasoner/logic/model/result"/>

-  </extension>

-  <extension id="hu.bme.mit.inf.dslreasoner.logic.model.patterns.TypeUtil" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.logic.model.patterns.TypeUtil" id="hu.bme.mit.inf.dslreasoner.logic.model.patterns.TypeUtil">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.supertypeStar"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.typeDirectElements"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.possibleDynamicType"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.mustTypeElement"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.typeSystemIsInconsistent"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.elementNotDefinedInSupertype"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.elementWithNoPossibleDynamicType"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.cyclicTypeHierarchy"/>

-    </group>

-  </extension>

-</plugin>

+--><plugin>
+  <extension point="org.eclipse.emf.ecore.generated_package">
+    <!-- @generated logiclanguage -->
+    <package class="hu.bme.mit.inf.dslreasoner.logic.model.logiclanguage.LogiclanguagePackage" genModel="model/logiclanguage.genmodel" uri="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language"/>
+  </extension>
+  <extension point="org.eclipse.emf.ecore.generated_package">
+    <!-- @generated logiclanguage -->
+    <package class="hu.bme.mit.inf.dslreasoner.logic.model.logicproblem.LogicproblemPackage" genModel="model/logiclanguage.genmodel" uri="http://www.bme.hu/mit/inf/dslreasoner/logic/model/problem"/>
+  </extension>
+  <extension point="org.eclipse.emf.ecore.generated_package">
+    <!-- @generated logiclanguage -->
+    <package class="hu.bme.mit.inf.dslreasoner.logic.model.logicresult.LogicresultPackage" genModel="model/logiclanguage.genmodel" uri="http://www.bme.hu/mit/inf/dslreasoner/logic/model/result"/>
+  </extension>
+  <extension id="hu.bme.mit.inf.dslreasoner.logic.model.patterns.TypeUtil" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.logic.model.patterns.TypeUtil" id="hu.bme.mit.inf.dslreasoner.logic.model.patterns.TypeUtil">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.supertypeStar"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.typeDirectElements"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.possibleDynamicType"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.mustTypeElement"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.typeSystemIsInconsistent"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.elementNotDefinedInSupertype"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.elementWithNoPossibleDynamicType"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.logic.model.patterns.cyclicTypeHierarchy"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.classpath b/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.classpath
index a2655410..849e2a7b 100644
--- a/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.classpath
+++ b/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.classpath
@@ -1,10 +1,14 @@
-<?xml version="1.0" encoding="UTF-8"?>

-<classpath>

-        <classpathentry kind="src" path="ecore-gen"/>

-        <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>

-        <classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>

-        <classpathentry kind="src" path="src"/>

-        <classpathentry kind="src" path="xtend-gen"/>

-        <classpathentry kind="lib" path="lib/com.microsoft.z3.jar"/>

-        <classpathentry kind="output" path="bin"/>

-</classpath>

+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+        <classpathentry kind="src" path="ecore-gen"/>
+        <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+        <classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+        <classpathentry kind="src" path="src"/>
+        <classpathentry kind="src" path="xtend-gen"/>
+        <classpathentry kind="lib" path="lib/com.microsoft.z3.jar">
+                <attributes>
+                        <attribute name="org.eclipse.jdt.launching.CLASSPATH_ATTR_LIBRARY_PATH_ENTRY" value="hu.bme.mit.inf.dslreasoner.viatra2logic/lib"/>
+                </attributes>
+        </classpathentry>
+        <classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.gitignore b/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.gitignore
index 8ae4e44d..40206e28 100644
--- a/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.gitignore
+++ b/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/.gitignore
@@ -2,3 +2,4 @@
 /src-gen/
 /vql-gen/
 /xtend-gen/
+/lib/*
diff --git a/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/lib/.gitignore b/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/lib/.gitignore
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/Framework/hu.bme.mit.inf.dslreasoner.viatra2logic/lib/.gitignore
diff --git a/Solvers/Alloy-Solver/hu.bme.mit.inf.dlsreasoner.alloy.reasoner/plugin.xml b/Solvers/Alloy-Solver/hu.bme.mit.inf.dlsreasoner.alloy.reasoner/plugin.xml
index 5457d70c..e57b595a 100644
--- a/Solvers/Alloy-Solver/hu.bme.mit.inf.dlsreasoner.alloy.reasoner/plugin.xml
+++ b/Solvers/Alloy-Solver/hu.bme.mit.inf.dlsreasoner.alloy.reasoner/plugin.xml
@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?><?eclipse version="3.0"?><!--
---><plugin>

-  <extension id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.SignatureQueries" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.SignatureQueries" id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.SignatureQueries">

-      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.directSubset"/>

-      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.subset"/>

-    </group>

-  </extension>

-  <extension id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.TypeQueries" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.TypeQueries" id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.TypeQueries">

-      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.supertype"/>

-      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.topmostCommonSubtypes"/>

-      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.lowermostCommonSupertype"/>

-      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.lowestCommonSupertypeOfAllOccuranceOfElement"/>

-    </group>

-  </extension>

-</plugin>

+--><plugin>
+  <extension id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.SignatureQueries" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.SignatureQueries" id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.SignatureQueries">
+      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.directSubset"/>
+      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.subset"/>
+    </group>
+  </extension>
+  <extension id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.TypeQueries" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.TypeQueries" id="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.TypeQueries">
+      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.supertype"/>
+      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.topmostCommonSubtypes"/>
+      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.lowermostCommonSupertype"/>
+      <query-specification fqn="hu.bme.mit.inf.dlsreasoner.alloy.reasoner.queries.lowestCommonSupertypeOfAllOccuranceOfElement"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/plugin.xml b/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/plugin.xml
index 05e00983..6e4d96ca 100644
--- a/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/plugin.xml
+++ b/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/plugin.xml
@@ -1,14 +1,14 @@
-<?xml version="1.0" encoding="UTF-8"?><plugin>

-  <extension id="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.TypeAnalysis" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.TypeAnalysis" id="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.TypeAnalysis">

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.hasDefinedSupertype"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.dontHaveDefinedSupertype"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementTypeConstructor"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementTypeRefinementTarget"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.incompatibleSuperType"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.incompatibleTopType"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementTypeRefinementNegativeConstraint"/>

-      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementMayTypeNegativeConstraint"/>

-    </group>

-  </extension>

-</plugin>

+<?xml version="1.0" encoding="UTF-8"?><plugin>
+  <extension id="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.TypeAnalysis" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.TypeAnalysis" id="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.TypeAnalysis">
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.hasDefinedSupertype"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.dontHaveDefinedSupertype"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementTypeConstructor"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementTypeRefinementTarget"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.incompatibleSuperType"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.incompatibleTopType"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementTypeRefinementNegativeConstraint"/>
+      <query-specification fqn="hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.queries.newElementMayTypeNegativeConstraint"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/.gitignore b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/.gitignore
deleted file mode 100644
index 3d70f0da..00000000
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/queries/
-/run/
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.FamilyTreeConstraints.java._trace b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.FamilyTreeConstraints.java._trace
index 12849bfe..ab0f3a9a 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.FamilyTreeConstraints.java._trace
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.FamilyTreeConstraints.java._trace
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.MemberIsItsOwnParent.java._trace b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.MemberIsItsOwnParent.java._trace
index 1b0dca98..aaf4d0c2 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.MemberIsItsOwnParent.java._trace
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.MemberIsItsOwnParent.java._trace
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.gitignore b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.gitignore
new file mode 100644
index 00000000..3be531f5
--- /dev/null
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/bin/queries/.gitignore
@@ -0,0 +1,8 @@
+/.FamilyTreeConstraints.java._trace
+/.MemberIsItsOwnParent.java._trace
+/FamilyTreeConstraints.java
+/MemberIsItsOwnParent.java
+/.ParentTooYoung.java._trace
+/.MemberHasNoParent.java._trace
+/.MemberHasParent.java._trace
+/.TwoMembersHaveNoParent.java._trace
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/errors.txt b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/errors.txt
index b7eed629..637be9c5 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/errors.txt
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/errors.txt
@@ -1,16 +1,16 @@
-Error occured (NullPointerException): 

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PConstraintTransformer.hasValueExpression(PConstraintTransformer.java:487)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PConstraintTransformer._transformConstraint(PConstraintTransformer.java:614)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PConstraintTransformer.transformConstraint(PConstraintTransformer.java:689)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.RelationDefinitionIndexer.transformPattern(RelationDefinitionIndexer.java:169)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.RelationDefinitionIndexer.generateRelationDefinitions(RelationDefinitionIndexer.java:51)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PatternGenerator.transformBaseProperties(PatternGenerator.java:747)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PatternProvider.generateQueries(PatternProvider.java:59)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.ModelGenerationMethodProvider.createModelGenerationMethod(ModelGenerationMethodProvider.java:57)

-    hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasoner.solve(ViatraReasoner.java:96)

-    hu.bme.mit.inf.dslreasoner.application.execution.GenerationTaskExecutor.executeGenerationTask(GenerationTaskExecutor.java:316)

-    hu.bme.mit.inf.dslreasoner.application.execution.ScriptExecutor._execute(ScriptExecutor.java:129)

-    hu.bme.mit.inf.dslreasoner.application.execution.ScriptExecutor.execute(ScriptExecutor.java:338)

-    hu.bme.mit.inf.dslreasoner.application.execution.ScriptExecutor.executeScript(ScriptExecutor.java:110)

-    hu.bme.mit.inf.dslreasoner.application.execution.StandaloneScriptExecutor.executeScript(StandaloneScriptExecutor.java:149)

-    run.FamilyTreeGen.main(FamilyTreeGen.java:7)

+Error occured (NullPointerException): 
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PConstraintTransformer.hasValueExpression(PConstraintTransformer.java:487)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PConstraintTransformer._transformConstraint(PConstraintTransformer.java:614)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PConstraintTransformer.transformConstraint(PConstraintTransformer.java:689)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.RelationDefinitionIndexer.transformPattern(RelationDefinitionIndexer.java:169)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.RelationDefinitionIndexer.generateRelationDefinitions(RelationDefinitionIndexer.java:51)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PatternGenerator.transformBaseProperties(PatternGenerator.java:747)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PatternProvider.generateQueries(PatternProvider.java:59)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.ModelGenerationMethodProvider.createModelGenerationMethod(ModelGenerationMethodProvider.java:57)
+    hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasoner.solve(ViatraReasoner.java:96)
+    hu.bme.mit.inf.dslreasoner.application.execution.GenerationTaskExecutor.executeGenerationTask(GenerationTaskExecutor.java:316)
+    hu.bme.mit.inf.dslreasoner.application.execution.ScriptExecutor._execute(ScriptExecutor.java:129)
+    hu.bme.mit.inf.dslreasoner.application.execution.ScriptExecutor.execute(ScriptExecutor.java:338)
+    hu.bme.mit.inf.dslreasoner.application.execution.ScriptExecutor.executeScript(ScriptExecutor.java:110)
+    hu.bme.mit.inf.dslreasoner.application.execution.StandaloneScriptExecutor.executeScript(StandaloneScriptExecutor.java:149)
+    run.FamilyTreeGen.main(FamilyTreeGen.java:7)
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/generation.logicproblem b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/generation.logicproblem
index 327ce8b0..d15360ce 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/generation.logicproblem
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/generation.logicproblem
@@ -1,340 +1,340 @@
-<?xml version="1.0" encoding="ASCII"?>

-<language:LogicProblem xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ecore2logicannotations="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language/ecore2logicannotation" xmlns:language="http://www.bme.hu/mit/inf/dslreasoner/logic/model/problem" xmlns:language_1="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language" xmlns:viatra2logicannotations="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language/viatra2logicannotation">

-  <types xsi:type="language_1:TypeDeclaration" name="FamilyTree class"/>

-  <types xsi:type="language_1:TypeDeclaration" name="Member class"/>

-  <assertions name="upperMultiplicity parents Member" annotations="//@annotations.0">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="src">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 1">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 2">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 3">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Impl">

-        <leftOperand xsi:type="language_1:And">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.1"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.2"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.3"/>

-          </operands>

-        </leftOperand>

-        <rightOperand xsi:type="language_1:Not">

-          <operand xsi:type="language_1:Distinct">

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.1"/>

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.2"/>

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.3"/>

-          </operand>

-        </rightOperand>

-      </expression>

-    </value>

-  </assertions>

-  <assertions name="oppositeReference children Member" annotations="//@annotations.1">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="src">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Iff">

-        <leftOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.1">

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.0"/>

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.1"/>

-        </leftOperand>

-        <rightOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.1"/>

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.0"/>

-        </rightOperand>

-      </expression>

-    </value>

-  </assertions>

-  <assertions name="upperMultiplicity name Member" annotations="//@annotations.2">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="src">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 1">

-        <range xsi:type="language_1:StringTypeReference"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 2">

-        <range xsi:type="language_1:StringTypeReference"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Impl">

-        <leftOperand xsi:type="language_1:And">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.3">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.1"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.3">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.2"/>

-          </operands>

-        </leftOperand>

-        <rightOperand xsi:type="language_1:Not">

-          <operand xsi:type="language_1:Distinct">

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.1"/>

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.2"/>

-          </operand>

-        </rightOperand>

-      </expression>

-    </value>

-  </assertions>

-  <assertions name="upperMultiplicity age Member" annotations="//@annotations.3">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="src">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 1">

-        <range xsi:type="language_1:IntTypeReference"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="trg 2">

-        <range xsi:type="language_1:IntTypeReference"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Impl">

-        <leftOperand xsi:type="language_1:And">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.1"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.2"/>

-          </operands>

-        </leftOperand>

-        <rightOperand xsi:type="language_1:Not">

-          <operand xsi:type="language_1:Distinct">

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.1"/>

-            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.2"/>

-          </operand>

-        </rightOperand>

-      </expression>

-    </value>

-  </assertions>

-  <assertions name="errorpattern queries memberIsItsOwnParent" annotations="//@annotations.8">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="p0">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Not">

-        <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5">

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.4/@value/@quantifiedVariables.0"/>

-        </operand>

-      </expression>

-    </value>

-  </assertions>

-  <assertions name="errorpattern queries twoMembersHaveNoParent" annotations="//@annotations.9">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="p0">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="p1">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Not">

-        <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6">

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.5/@value/@quantifiedVariables.0"/>

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.5/@value/@quantifiedVariables.1"/>

-        </operand>

-      </expression>

-    </value>

-  </assertions>

-  <assertions name="errorpattern queries parentTooYoung" annotations="//@annotations.10">

-    <value xsi:type="language_1:Forall">

-      <quantifiedVariables name="p0">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <quantifiedVariables name="p1">

-        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-      </quantifiedVariables>

-      <expression xsi:type="language_1:Not">

-        <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8">

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.6/@value/@quantifiedVariables.0"/>

-          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.6/@value/@quantifiedVariables.1"/>

-        </operand>

-      </expression>

-    </value>

-  </assertions>

-  <relations xsi:type="language_1:RelationDeclaration" name="members reference FamilyTree">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.0"/>

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-  </relations>

-  <relations xsi:type="language_1:RelationDeclaration" name="children reference Member">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-  </relations>

-  <relations xsi:type="language_1:RelationDeclaration" name="parents reference Member">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-  </relations>

-  <relations xsi:type="language_1:RelationDeclaration" name="name attribute Member">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <parameters xsi:type="language_1:StringTypeReference"/>

-  </relations>

-  <relations xsi:type="language_1:RelationDeclaration" name="age attribute Member">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <parameters xsi:type="language_1:IntTypeReference"/>

-  </relations>

-  <relations xsi:type="language_1:RelationDefinition" name="pattern queries memberIsItsOwnParent" annotations="//@annotations.4">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <variables name="parameter m">

-      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    </variables>

-    <value xsi:type="language_1:Or">

-      <operands xsi:type="language_1:Exists">

-        <quantifiedVariables name="variable 0">

-          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.0"/>

-        </quantifiedVariables>

-        <expression xsi:type="language_1:And">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.0">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@value/@operands.0/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@variables.0"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@variables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@variables.0"/>

-          </operands>

-        </expression>

-      </operands>

-    </value>

-  </relations>

-  <relations xsi:type="language_1:RelationDefinition" name="pattern queries twoMembersHaveNoParent" annotations="//@annotations.5">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <variables name="parameter m1">

-      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    </variables>

-    <variables name="parameter m2">

-      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    </variables>

-    <value xsi:type="language_1:Or">

-      <operands xsi:type="language_1:And">

-        <operands xsi:type="language_1:InstanceOf">

-          <value xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.0"/>

-          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-        </operands>

-        <operands xsi:type="language_1:InstanceOf">

-          <value xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.1"/>

-          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-        </operands>

-        <operands xsi:type="language_1:Not">

-          <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.0"/>

-          </operand>

-        </operands>

-        <operands xsi:type="language_1:Not">

-          <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.1"/>

-          </operand>

-        </operands>

-        <operands xsi:type="language_1:Distinct">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.0"/>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.1"/>

-        </operands>

-      </operands>

-    </value>

-  </relations>

-  <relations xsi:type="language_1:RelationDefinition" name="pattern queries memberHasParent" annotations="//@annotations.6">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <variables name="parameter m">

-      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    </variables>

-    <value xsi:type="language_1:Or">

-      <operands xsi:type="language_1:Exists">

-        <quantifiedVariables name="variable 0">

-          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-        </quantifiedVariables>

-        <expression xsi:type="language_1:And">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7/@variables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7/@value/@operands.0/@quantifiedVariables.0"/>

-          </operands>

-          <operands xsi:type="language_1:InstanceOf">

-            <value xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7/@value/@operands.0/@quantifiedVariables.0"/>

-            <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-          </operands>

-        </expression>

-      </operands>

-    </value>

-  </relations>

-  <relations xsi:type="language_1:RelationDefinition" name="pattern queries parentTooYoung" annotations="//@annotations.7">

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    <variables name="parameter m">

-      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    </variables>

-    <variables name="parameter p">

-      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>

-    </variables>

-    <value xsi:type="language_1:Or">

-      <operands xsi:type="language_1:Exists">

-        <quantifiedVariables name="variable 0">

-          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.0"/>

-        </quantifiedVariables>

-        <quantifiedVariables name="variable mAge">

-          <range xsi:type="language_1:IntTypeReference"/>

-        </quantifiedVariables>

-        <quantifiedVariables name="variable pAge">

-          <range xsi:type="language_1:IntTypeReference"/>

-        </quantifiedVariables>

-        <expression xsi:type="language_1:And">

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.0">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.0"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.1"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.0"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.1"/>

-          </operands>

-          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.1"/>

-            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.2"/>

-          </operands>

-          <operands xsi:type="language_1:LessOrEqualThan">

-            <leftOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.1"/>

-            <rightOperand xsi:type="language_1:Plus">

-              <leftOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.2"/>

-              <rightOperand xsi:type="language_1:IntLiteral" value="12"/>

-            </rightOperand>

-          </operands>

-        </expression>

-      </operands>

-    </value>

-  </relations>

-  <containmentHierarchies typesOrderedInHierarchy="//@types.1 //@types.0" containmentRelations="//@relations.0"/>

-  <annotations xsi:type="ecore2logicannotations:UpperMultiplicityAssertion" target="//@assertions.0" relation="//@relations.2" upper="2"/>

-  <annotations xsi:type="ecore2logicannotations:InverseRelationAssertion" target="//@assertions.1" inverseA="//@relations.1" inverseB="//@relations.2"/>

-  <annotations xsi:type="ecore2logicannotations:UpperMultiplicityAssertion" target="//@assertions.2" relation="//@relations.3" upper="1"/>

-  <annotations xsi:type="ecore2logicannotations:UpperMultiplicityAssertion" target="//@assertions.3" relation="//@relations.4" upper="1"/>

-  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.5" patternFullyQualifiedName="queries.memberIsItsOwnParent">

-    <variableTrace targetLogicVariable="//@relations.5/@value/@operands.0/@quantifiedVariables.0"/>

-  </annotations>

-  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.6" patternFullyQualifiedName="queries.twoMembersHaveNoParent"/>

-  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.7" patternFullyQualifiedName="queries.memberHasParent">

-    <variableTrace targetLogicVariable="//@relations.7/@value/@operands.0/@quantifiedVariables.0"/>

-  </annotations>

-  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.8" patternFullyQualifiedName="queries.parentTooYoung">

-    <variableTrace targetLogicVariable="//@relations.8/@value/@operands.0/@quantifiedVariables.0"/>

-    <variableTrace targetLogicVariable="//@relations.8/@value/@operands.0/@quantifiedVariables.1"/>

-    <variableTrace targetLogicVariable="//@relations.8/@value/@operands.0/@quantifiedVariables.2"/>

-  </annotations>

-  <annotations xsi:type="viatra2logicannotations:TransformedViatraWellformednessConstraint" target="//@assertions.4" query="//@annotations.4"/>

-  <annotations xsi:type="viatra2logicannotations:TransformedViatraWellformednessConstraint" target="//@assertions.5" query="//@annotations.5"/>

-  <annotations xsi:type="viatra2logicannotations:TransformedViatraWellformednessConstraint" target="//@assertions.6" query="//@annotations.7"/>

-</language:LogicProblem>

+<?xml version="1.0" encoding="ASCII"?>
+<language:LogicProblem xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ecore2logicannotations="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language/ecore2logicannotation" xmlns:language="http://www.bme.hu/mit/inf/dslreasoner/logic/model/problem" xmlns:language_1="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language" xmlns:viatra2logicannotations="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language/viatra2logicannotation">
+  <types xsi:type="language_1:TypeDeclaration" name="FamilyTree class"/>
+  <types xsi:type="language_1:TypeDeclaration" name="Member class"/>
+  <assertions name="upperMultiplicity parents Member" annotations="//@annotations.0">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="src">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 1">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 2">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 3">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Impl">
+        <leftOperand xsi:type="language_1:And">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.1"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.2"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.3"/>
+          </operands>
+        </leftOperand>
+        <rightOperand xsi:type="language_1:Not">
+          <operand xsi:type="language_1:Distinct">
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.1"/>
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.2"/>
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.0/@value/@quantifiedVariables.3"/>
+          </operand>
+        </rightOperand>
+      </expression>
+    </value>
+  </assertions>
+  <assertions name="oppositeReference children Member" annotations="//@annotations.1">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="src">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Iff">
+        <leftOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.1">
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.0"/>
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.1"/>
+        </leftOperand>
+        <rightOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.1"/>
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.1/@value/@quantifiedVariables.0"/>
+        </rightOperand>
+      </expression>
+    </value>
+  </assertions>
+  <assertions name="upperMultiplicity name Member" annotations="//@annotations.2">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="src">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 1">
+        <range xsi:type="language_1:StringTypeReference"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 2">
+        <range xsi:type="language_1:StringTypeReference"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Impl">
+        <leftOperand xsi:type="language_1:And">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.3">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.1"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.3">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.2"/>
+          </operands>
+        </leftOperand>
+        <rightOperand xsi:type="language_1:Not">
+          <operand xsi:type="language_1:Distinct">
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.1"/>
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.2/@value/@quantifiedVariables.2"/>
+          </operand>
+        </rightOperand>
+      </expression>
+    </value>
+  </assertions>
+  <assertions name="upperMultiplicity age Member" annotations="//@annotations.3">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="src">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 1">
+        <range xsi:type="language_1:IntTypeReference"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="trg 2">
+        <range xsi:type="language_1:IntTypeReference"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Impl">
+        <leftOperand xsi:type="language_1:And">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.1"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.2"/>
+          </operands>
+        </leftOperand>
+        <rightOperand xsi:type="language_1:Not">
+          <operand xsi:type="language_1:Distinct">
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.1"/>
+            <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.3/@value/@quantifiedVariables.2"/>
+          </operand>
+        </rightOperand>
+      </expression>
+    </value>
+  </assertions>
+  <assertions name="errorpattern queries memberIsItsOwnParent" annotations="//@annotations.8">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="p0">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Not">
+        <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5">
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.4/@value/@quantifiedVariables.0"/>
+        </operand>
+      </expression>
+    </value>
+  </assertions>
+  <assertions name="errorpattern queries twoMembersHaveNoParent" annotations="//@annotations.9">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="p0">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="p1">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Not">
+        <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6">
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.5/@value/@quantifiedVariables.0"/>
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.5/@value/@quantifiedVariables.1"/>
+        </operand>
+      </expression>
+    </value>
+  </assertions>
+  <assertions name="errorpattern queries parentTooYoung" annotations="//@annotations.10">
+    <value xsi:type="language_1:Forall">
+      <quantifiedVariables name="p0">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <quantifiedVariables name="p1">
+        <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+      </quantifiedVariables>
+      <expression xsi:type="language_1:Not">
+        <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8">
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.6/@value/@quantifiedVariables.0"/>
+          <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@assertions.6/@value/@quantifiedVariables.1"/>
+        </operand>
+      </expression>
+    </value>
+  </assertions>
+  <relations xsi:type="language_1:RelationDeclaration" name="members reference FamilyTree">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.0"/>
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+  </relations>
+  <relations xsi:type="language_1:RelationDeclaration" name="children reference Member">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+  </relations>
+  <relations xsi:type="language_1:RelationDeclaration" name="parents reference Member">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+  </relations>
+  <relations xsi:type="language_1:RelationDeclaration" name="name attribute Member">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <parameters xsi:type="language_1:StringTypeReference"/>
+  </relations>
+  <relations xsi:type="language_1:RelationDeclaration" name="age attribute Member">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <parameters xsi:type="language_1:IntTypeReference"/>
+  </relations>
+  <relations xsi:type="language_1:RelationDefinition" name="pattern queries memberIsItsOwnParent" annotations="//@annotations.4">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <variables name="parameter m">
+      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    </variables>
+    <value xsi:type="language_1:Or">
+      <operands xsi:type="language_1:Exists">
+        <quantifiedVariables name="variable 0">
+          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.0"/>
+        </quantifiedVariables>
+        <expression xsi:type="language_1:And">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.0">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@value/@operands.0/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@variables.0"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@variables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.5/@variables.0"/>
+          </operands>
+        </expression>
+      </operands>
+    </value>
+  </relations>
+  <relations xsi:type="language_1:RelationDefinition" name="pattern queries twoMembersHaveNoParent" annotations="//@annotations.5">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <variables name="parameter m1">
+      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    </variables>
+    <variables name="parameter m2">
+      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    </variables>
+    <value xsi:type="language_1:Or">
+      <operands xsi:type="language_1:And">
+        <operands xsi:type="language_1:InstanceOf">
+          <value xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.0"/>
+          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+        </operands>
+        <operands xsi:type="language_1:InstanceOf">
+          <value xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.1"/>
+          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+        </operands>
+        <operands xsi:type="language_1:Not">
+          <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.0"/>
+          </operand>
+        </operands>
+        <operands xsi:type="language_1:Not">
+          <operand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.1"/>
+          </operand>
+        </operands>
+        <operands xsi:type="language_1:Distinct">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.0"/>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.6/@variables.1"/>
+        </operands>
+      </operands>
+    </value>
+  </relations>
+  <relations xsi:type="language_1:RelationDefinition" name="pattern queries memberHasParent" annotations="//@annotations.6">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <variables name="parameter m">
+      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    </variables>
+    <value xsi:type="language_1:Or">
+      <operands xsi:type="language_1:Exists">
+        <quantifiedVariables name="variable 0">
+          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+        </quantifiedVariables>
+        <expression xsi:type="language_1:And">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7/@variables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7/@value/@operands.0/@quantifiedVariables.0"/>
+          </operands>
+          <operands xsi:type="language_1:InstanceOf">
+            <value xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.7/@value/@operands.0/@quantifiedVariables.0"/>
+            <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+          </operands>
+        </expression>
+      </operands>
+    </value>
+  </relations>
+  <relations xsi:type="language_1:RelationDefinition" name="pattern queries parentTooYoung" annotations="//@annotations.7">
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <parameters xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    <variables name="parameter m">
+      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    </variables>
+    <variables name="parameter p">
+      <range xsi:type="language_1:ComplexTypeReference" referred="//@types.1"/>
+    </variables>
+    <value xsi:type="language_1:Or">
+      <operands xsi:type="language_1:Exists">
+        <quantifiedVariables name="variable 0">
+          <range xsi:type="language_1:ComplexTypeReference" referred="//@types.0"/>
+        </quantifiedVariables>
+        <quantifiedVariables name="variable mAge">
+          <range xsi:type="language_1:IntTypeReference"/>
+        </quantifiedVariables>
+        <quantifiedVariables name="variable pAge">
+          <range xsi:type="language_1:IntTypeReference"/>
+        </quantifiedVariables>
+        <expression xsi:type="language_1:And">
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.0">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.0"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.2">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.1"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.0"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.1"/>
+          </operands>
+          <operands xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.4">
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@variables.1"/>
+            <parameterSubstitutions xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.2"/>
+          </operands>
+          <operands xsi:type="language_1:LessOrEqualThan">
+            <leftOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.1"/>
+            <rightOperand xsi:type="language_1:Plus">
+              <leftOperand xsi:type="language_1:SymbolicValue" symbolicReference="//@relations.8/@value/@operands.0/@quantifiedVariables.2"/>
+              <rightOperand xsi:type="language_1:IntLiteral" value="12"/>
+            </rightOperand>
+          </operands>
+        </expression>
+      </operands>
+    </value>
+  </relations>
+  <containmentHierarchies typesOrderedInHierarchy="//@types.0 //@types.1" containmentRelations="//@relations.0"/>
+  <annotations xsi:type="ecore2logicannotations:UpperMultiplicityAssertion" target="//@assertions.0" relation="//@relations.2" upper="2"/>
+  <annotations xsi:type="ecore2logicannotations:InverseRelationAssertion" target="//@assertions.1" inverseA="//@relations.1" inverseB="//@relations.2"/>
+  <annotations xsi:type="ecore2logicannotations:UpperMultiplicityAssertion" target="//@assertions.2" relation="//@relations.3" upper="1"/>
+  <annotations xsi:type="ecore2logicannotations:UpperMultiplicityAssertion" target="//@assertions.3" relation="//@relations.4" upper="1"/>
+  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.5" patternFullyQualifiedName="queries.memberIsItsOwnParent">
+    <variableTrace targetLogicVariable="//@relations.5/@value/@operands.0/@quantifiedVariables.0"/>
+  </annotations>
+  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.6" patternFullyQualifiedName="queries.twoMembersHaveNoParent"/>
+  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.7" patternFullyQualifiedName="queries.memberHasParent">
+    <variableTrace targetLogicVariable="//@relations.7/@value/@operands.0/@quantifiedVariables.0"/>
+  </annotations>
+  <annotations xsi:type="viatra2logicannotations:TransfomedViatraQuery" target="//@relations.8" patternFullyQualifiedName="queries.parentTooYoung">
+    <variableTrace targetLogicVariable="//@relations.8/@value/@operands.0/@quantifiedVariables.0"/>
+    <variableTrace targetLogicVariable="//@relations.8/@value/@operands.0/@quantifiedVariables.1"/>
+    <variableTrace targetLogicVariable="//@relations.8/@value/@operands.0/@quantifiedVariables.2"/>
+  </annotations>
+  <annotations xsi:type="viatra2logicannotations:TransformedViatraWellformednessConstraint" target="//@assertions.4" query="//@annotations.4"/>
+  <annotations xsi:type="viatra2logicannotations:TransformedViatraWellformednessConstraint" target="//@assertions.5" query="//@annotations.5"/>
+  <annotations xsi:type="viatra2logicannotations:TransformedViatraWellformednessConstraint" target="//@assertions.6" query="//@annotations.7"/>
+</language:LogicProblem>
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/init.partialmodel b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/init.partialmodel
index 949d6b64..df908518 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/init.partialmodel
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/debug/init.partialmodel
@@ -1,51 +1,51 @@
-<?xml version="1.0" encoding="ASCII"?>

-<partialinterpretation:PartialInterpretation xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:language="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language" xmlns:partialinterpretation="http://www.bme.hu/mit/inf/dslreasoner/viatrasolver/partialinterpretationlanguage" minNewElements="6" maxNewElements="6">

-  <problem href="outputs/debug/generation.logicproblem#/"/>

-  <partialrelationinterpretation>

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.0"/>

-    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.0/@parameters.0"/>

-    <param2 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.0/@parameters.1"/>

-  </partialrelationinterpretation>

-  <partialrelationinterpretation>

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.1"/>

-    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.1/@parameters.0"/>

-    <param2 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.1/@parameters.1"/>

-  </partialrelationinterpretation>

-  <partialrelationinterpretation>

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.2"/>

-    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.2/@parameters.0"/>

-    <param2 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.2/@parameters.1"/>

-  </partialrelationinterpretation>

-  <partialrelationinterpretation>

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.3"/>

-    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.3/@parameters.0"/>

-    <param2 xsi:type="language:StringTypeReference" href="outputs/debug/generation.logicproblem#//@relations.3/@parameters.1"/>

-  </partialrelationinterpretation>

-  <partialrelationinterpretation>

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.4"/>

-    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.4/@parameters.0"/>

-    <param2 xsi:type="language:IntTypeReference" href="outputs/debug/generation.logicproblem#//@relations.4/@parameters.1"/>

-  </partialrelationinterpretation>

-  <newElements xsi:type="partialinterpretation:BooleanElement" name="true" valueSet="true" value="true"/>

-  <newElements xsi:type="partialinterpretation:BooleanElement" name="false" valueSet="true"/>

-  <newElements xsi:type="partialinterpretation:IntegerElement" name="1" valueSet="true" value="1"/>

-  <newElements xsi:type="partialinterpretation:IntegerElement" name="2" valueSet="true" value="2"/>

-  <newElements xsi:type="partialinterpretation:IntegerElement" name="3" valueSet="true" value="3"/>

-  <newElements xsi:type="partialinterpretation:IntegerElement" name="4" valueSet="true" value="4"/>

-  <newElements xsi:type="partialinterpretation:IntegerElement" name="5" valueSet="true" value="5"/>

-  <partialtypeinterpratation xsi:type="partialinterpretation:PartialBooleanInterpretation" elements="//@newElements.0 //@newElements.1"/>

-  <partialtypeinterpratation xsi:type="partialinterpretation:PartialIntegerInterpretation" elements="//@newElements.2 //@newElements.3 //@newElements.4 //@newElements.5 //@newElements.6"/>

-  <partialtypeinterpratation xsi:type="partialinterpretation:PartialRealInterpretation" elements="//@openWorldElements.0"/>

-  <partialtypeinterpratation xsi:type="partialinterpretation:PartialStringInterpretation" elements="//@openWorldElements.1"/>

-  <partialtypeinterpratation xsi:type="partialinterpretation:PartialComplexTypeInterpretation" scopes="//@scopes.0">

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@types.0"/>

-  </partialtypeinterpratation>

-  <partialtypeinterpratation xsi:type="partialinterpretation:PartialComplexTypeInterpretation" scopes="//@scopes.1">

-    <interpretationOf href="outputs/debug/generation.logicproblem#//@types.1"/>

-  </partialtypeinterpratation>

-  <openWorldElements xsi:type="partialinterpretation:RealElement" name="New Reals"/>

-  <openWorldElements xsi:type="partialinterpretation:StringElement" name="New Strings"/>

-  <openWorldElements name="New Objects"/>

-  <scopes targetTypeInterpretation="//@partialtypeinterpratation.4"/>

-  <scopes targetTypeInterpretation="//@partialtypeinterpratation.5"/>

-</partialinterpretation:PartialInterpretation>

+<?xml version="1.0" encoding="ASCII"?>
+<partialinterpretation:PartialInterpretation xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:language="http://www.bme.hu/mit/inf/dslreasoner/logic/model/language" xmlns:partialinterpretation="http://www.bme.hu/mit/inf/dslreasoner/viatrasolver/partialinterpretationlanguage" minNewElements="6" maxNewElements="6">
+  <problem href="outputs/debug/generation.logicproblem#/"/>
+  <partialrelationinterpretation>
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.0"/>
+    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.0/@parameters.0"/>
+    <param2 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.0/@parameters.1"/>
+  </partialrelationinterpretation>
+  <partialrelationinterpretation>
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.1"/>
+    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.1/@parameters.0"/>
+    <param2 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.1/@parameters.1"/>
+  </partialrelationinterpretation>
+  <partialrelationinterpretation>
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.2"/>
+    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.2/@parameters.0"/>
+    <param2 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.2/@parameters.1"/>
+  </partialrelationinterpretation>
+  <partialrelationinterpretation>
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.3"/>
+    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.3/@parameters.0"/>
+    <param2 xsi:type="language:StringTypeReference" href="outputs/debug/generation.logicproblem#//@relations.3/@parameters.1"/>
+  </partialrelationinterpretation>
+  <partialrelationinterpretation>
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@relations.4"/>
+    <param1 xsi:type="language:ComplexTypeReference" href="outputs/debug/generation.logicproblem#//@relations.4/@parameters.0"/>
+    <param2 xsi:type="language:IntTypeReference" href="outputs/debug/generation.logicproblem#//@relations.4/@parameters.1"/>
+  </partialrelationinterpretation>
+  <newElements xsi:type="partialinterpretation:BooleanElement" name="true" valueSet="true" value="true"/>
+  <newElements xsi:type="partialinterpretation:BooleanElement" name="false" valueSet="true"/>
+  <newElements xsi:type="partialinterpretation:IntegerElement" name="1" valueSet="true" value="1"/>
+  <newElements xsi:type="partialinterpretation:IntegerElement" name="2" valueSet="true" value="2"/>
+  <newElements xsi:type="partialinterpretation:IntegerElement" name="3" valueSet="true" value="3"/>
+  <newElements xsi:type="partialinterpretation:IntegerElement" name="4" valueSet="true" value="4"/>
+  <newElements xsi:type="partialinterpretation:IntegerElement" name="5" valueSet="true" value="5"/>
+  <partialtypeinterpratation xsi:type="partialinterpretation:PartialBooleanInterpretation" elements="//@newElements.0 //@newElements.1"/>
+  <partialtypeinterpratation xsi:type="partialinterpretation:PartialIntegerInterpretation" elements="//@newElements.2 //@newElements.3 //@newElements.4 //@newElements.5 //@newElements.6"/>
+  <partialtypeinterpratation xsi:type="partialinterpretation:PartialRealInterpretation" elements="//@openWorldElements.0"/>
+  <partialtypeinterpratation xsi:type="partialinterpretation:PartialStringInterpretation" elements="//@openWorldElements.1"/>
+  <partialtypeinterpratation xsi:type="partialinterpretation:PartialComplexTypeInterpretation" scopes="//@scopes.0">
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@types.0"/>
+  </partialtypeinterpratation>
+  <partialtypeinterpratation xsi:type="partialinterpretation:PartialComplexTypeInterpretation" scopes="//@scopes.1">
+    <interpretationOf href="outputs/debug/generation.logicproblem#//@types.1"/>
+  </partialtypeinterpratation>
+  <openWorldElements xsi:type="partialinterpretation:RealElement" name="New Reals"/>
+  <openWorldElements xsi:type="partialinterpretation:StringElement" name="New Strings"/>
+  <openWorldElements name="New Objects"/>
+  <scopes targetTypeInterpretation="//@partialtypeinterpratation.4"/>
+  <scopes targetTypeInterpretation="//@partialtypeinterpratation.5"/>
+</partialinterpretation:PartialInterpretation>
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/log.txt b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/log.txt
index 43befb00..1d3c9f62 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/log.txt
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/outputs/log.txt
@@ -1 +1 @@
-Model generation started

+Model generation started
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/plugin.xml b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/plugin.xml
index 9364ebb2..941ef4d7 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/plugin.xml
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/plugin.xml
@@ -1,10 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?><plugin>

-  <extension id="queries.FamilyTreeConstraints" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:queries.FamilyTreeConstraints" id="queries.FamilyTreeConstraints">

-      <query-specification fqn="queries.memberIsItsOwnParent"/>

-      <query-specification fqn="queries.twoMembersHaveNoParent"/>

-      <query-specification fqn="queries.memberHasParent"/>

-      <query-specification fqn="queries.parentTooYoung"/>

-    </group>

-  </extension>

-</plugin>

+<?xml version="1.0" encoding="UTF-8"?><plugin>
+  <extension id="queries.FamilyTreeConstraints" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:queries.FamilyTreeConstraints" id="queries.FamilyTreeConstraints">
+      <query-specification fqn="queries.memberIsItsOwnParent"/>
+      <query-specification fqn="queries.twoMembersHaveNoParent"/>
+      <query-specification fqn="queries.memberHasParent"/>
+      <query-specification fqn="queries.parentTooYoung"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.FamilyTreeConstraints.java._trace b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.FamilyTreeConstraints.java._trace
index 12849bfe..ab0f3a9a 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.FamilyTreeConstraints.java._trace
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.FamilyTreeConstraints.java._trace
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.MemberIsItsOwnParent.java._trace b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.MemberIsItsOwnParent.java._trace
index 1b0dca98..aaf4d0c2 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.MemberIsItsOwnParent.java._trace
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/.MemberIsItsOwnParent.java._trace
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/FamilyTreeConstraints.java b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/FamilyTreeConstraints.java
index 738b41c0..97148b5e 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/FamilyTreeConstraints.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/FamilyTreeConstraints.java
@@ -1,86 +1,86 @@
-/**

- * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql

- */

-package queries;

-

-import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedPatternGroup;

-import queries.MemberHasParent;

-import queries.MemberIsItsOwnParent;

-import queries.ParentTooYoung;

-import queries.TwoMembersHaveNoParent;

-

-/**

- * A pattern group formed of all public patterns defined in familyTreeConstraints.vql.

- * 

- * <p>Use the static instance as any {@link interface org.eclipse.viatra.query.runtime.api.IQueryGroup}, to conveniently prepare

- * a VIATRA Query engine for matching all patterns originally defined in file familyTreeConstraints.vql,

- * in order to achieve better performance than one-by-one on-demand matcher initialization.

- * 

- * <p> From package queries, the group contains the definition of the following patterns: <ul>

- * <li>memberIsItsOwnParent</li>

- * <li>twoMembersHaveNoParent</li>

- * <li>memberHasParent</li>

- * <li>parentTooYoung</li>

- * </ul>

- * 

- * @see IQueryGroup

- * 

- */

-@SuppressWarnings("all")

-public final class FamilyTreeConstraints extends BaseGeneratedPatternGroup {

-  /**

-   * Access the pattern group.

-   * 

-   * @return the singleton instance of the group

-   * @throws ViatraQueryRuntimeException if there was an error loading the generated code of pattern specifications

-   * 

-   */

-  public static FamilyTreeConstraints instance() {

-    if (INSTANCE == null) {

-        INSTANCE = new FamilyTreeConstraints();

-    }

-    return INSTANCE;

-  }

-  

-  private static FamilyTreeConstraints INSTANCE;

-  

-  private FamilyTreeConstraints() {

-    querySpecifications.add(MemberIsItsOwnParent.instance());

-    querySpecifications.add(TwoMembersHaveNoParent.instance());

-    querySpecifications.add(MemberHasParent.instance());

-    querySpecifications.add(ParentTooYoung.instance());

-  }

-  

-  public MemberIsItsOwnParent getMemberIsItsOwnParent() {

-    return MemberIsItsOwnParent.instance();

-  }

-  

-  public MemberIsItsOwnParent.Matcher getMemberIsItsOwnParent(final ViatraQueryEngine engine) {

-    return MemberIsItsOwnParent.Matcher.on(engine);

-  }

-  

-  public TwoMembersHaveNoParent getTwoMembersHaveNoParent() {

-    return TwoMembersHaveNoParent.instance();

-  }

-  

-  public TwoMembersHaveNoParent.Matcher getTwoMembersHaveNoParent(final ViatraQueryEngine engine) {

-    return TwoMembersHaveNoParent.Matcher.on(engine);

-  }

-  

-  public MemberHasParent getMemberHasParent() {

-    return MemberHasParent.instance();

-  }

-  

-  public MemberHasParent.Matcher getMemberHasParent(final ViatraQueryEngine engine) {

-    return MemberHasParent.Matcher.on(engine);

-  }

-  

-  public ParentTooYoung getParentTooYoung() {

-    return ParentTooYoung.instance();

-  }

-  

-  public ParentTooYoung.Matcher getParentTooYoung(final ViatraQueryEngine engine) {

-    return ParentTooYoung.Matcher.on(engine);

-  }

-}

+/**
+ * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql
+ */
+package queries;
+
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedPatternGroup;
+import queries.MemberHasParent;
+import queries.MemberIsItsOwnParent;
+import queries.ParentTooYoung;
+import queries.TwoMembersHaveNoParent;
+
+/**
+ * A pattern group formed of all public patterns defined in familyTreeConstraints.vql.
+ * 
+ * <p>Use the static instance as any {@link interface org.eclipse.viatra.query.runtime.api.IQueryGroup}, to conveniently prepare
+ * a VIATRA Query engine for matching all patterns originally defined in file familyTreeConstraints.vql,
+ * in order to achieve better performance than one-by-one on-demand matcher initialization.
+ * 
+ * <p> From package queries, the group contains the definition of the following patterns: <ul>
+ * <li>memberIsItsOwnParent</li>
+ * <li>twoMembersHaveNoParent</li>
+ * <li>memberHasParent</li>
+ * <li>parentTooYoung</li>
+ * </ul>
+ * 
+ * @see IQueryGroup
+ * 
+ */
+@SuppressWarnings("all")
+public final class FamilyTreeConstraints extends BaseGeneratedPatternGroup {
+  /**
+   * Access the pattern group.
+   * 
+   * @return the singleton instance of the group
+   * @throws ViatraQueryRuntimeException if there was an error loading the generated code of pattern specifications
+   * 
+   */
+  public static FamilyTreeConstraints instance() {
+    if (INSTANCE == null) {
+        INSTANCE = new FamilyTreeConstraints();
+    }
+    return INSTANCE;
+  }
+  
+  private static FamilyTreeConstraints INSTANCE;
+  
+  private FamilyTreeConstraints() {
+    querySpecifications.add(MemberIsItsOwnParent.instance());
+    querySpecifications.add(TwoMembersHaveNoParent.instance());
+    querySpecifications.add(MemberHasParent.instance());
+    querySpecifications.add(ParentTooYoung.instance());
+  }
+  
+  public MemberIsItsOwnParent getMemberIsItsOwnParent() {
+    return MemberIsItsOwnParent.instance();
+  }
+  
+  public MemberIsItsOwnParent.Matcher getMemberIsItsOwnParent(final ViatraQueryEngine engine) {
+    return MemberIsItsOwnParent.Matcher.on(engine);
+  }
+  
+  public TwoMembersHaveNoParent getTwoMembersHaveNoParent() {
+    return TwoMembersHaveNoParent.instance();
+  }
+  
+  public TwoMembersHaveNoParent.Matcher getTwoMembersHaveNoParent(final ViatraQueryEngine engine) {
+    return TwoMembersHaveNoParent.Matcher.on(engine);
+  }
+  
+  public MemberHasParent getMemberHasParent() {
+    return MemberHasParent.instance();
+  }
+  
+  public MemberHasParent.Matcher getMemberHasParent(final ViatraQueryEngine engine) {
+    return MemberHasParent.Matcher.on(engine);
+  }
+  
+  public ParentTooYoung getParentTooYoung() {
+    return ParentTooYoung.instance();
+  }
+  
+  public ParentTooYoung.Matcher getParentTooYoung(final ViatraQueryEngine engine) {
+    return ParentTooYoung.Matcher.on(engine);
+  }
+}
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberHasParent.java b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberHasParent.java
index 82b83d0c..83bb4aac 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberHasParent.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberHasParent.java
@@ -1,551 +1,551 @@
-/**

- * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql

- */

-package queries;

-

-import familytree.Member;

-import java.util.Arrays;

-import java.util.Collection;

-import java.util.LinkedHashSet;

-import java.util.List;

-import java.util.Objects;

-import java.util.Optional;

-import java.util.Set;

-import java.util.function.Consumer;

-import java.util.stream.Collectors;

-import java.util.stream.Stream;

-import org.apache.log4j.Logger;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.viatra.query.runtime.api.IPatternMatch;

-import org.eclipse.viatra.query.runtime.api.IQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;

-import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;

-import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;

-import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;

-import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;

-import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;

-

-/**

- * A pattern-specific query specification that can instantiate Matcher in a type-safe way.

- * 

- * <p>Original source:

- *         <code><pre>

- *         pattern memberHasParent(m: Member) = {

- *              Member.parents(m, _);

- *         }

- * </pre></code>

- * 

- * @see Matcher

- * @see Match

- * 

- */

-@SuppressWarnings("all")

-public final class MemberHasParent extends BaseGeneratedEMFQuerySpecification<MemberHasParent.Matcher> {

-  /**

-   * Pattern-specific match representation of the queries.memberHasParent pattern,

-   * to be used in conjunction with {@link Matcher}.

-   * 

-   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.

-   * Each instance is a (possibly partial) substitution of pattern parameters,

-   * usable to represent a match of the pattern in the result of a query,

-   * or to specify the bound (fixed) input parameters when issuing a query.

-   * 

-   * @see Matcher

-   * 

-   */

-  public static abstract class Match extends BasePatternMatch {

-    private Member fM;

-    

-    private static List<String> parameterNames = makeImmutableList("m");

-    

-    private Match(final Member pM) {

-      this.fM = pM;

-    }

-    

-    @Override

-    public Object get(final String parameterName) {

-      switch(parameterName) {

-          case "m": return this.fM;

-          default: return null;

-      }

-    }

-    

-    @Override

-    public Object get(final int index) {

-      switch(index) {

-          case 0: return this.fM;

-          default: return null;

-      }

-    }

-    

-    public Member getM() {

-      return this.fM;

-    }

-    

-    @Override

-    public boolean set(final String parameterName, final Object newValue) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      if ("m".equals(parameterName) ) {

-          this.fM = (Member) newValue;

-          return true;

-      }

-      return false;

-    }

-    

-    public void setM(final Member pM) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fM = pM;

-    }

-    

-    @Override

-    public String patternName() {

-      return "queries.memberHasParent";

-    }

-    

-    @Override

-    public List<String> parameterNames() {

-      return MemberHasParent.Match.parameterNames;

-    }

-    

-    @Override

-    public Object[] toArray() {

-      return new Object[]{fM};

-    }

-    

-    @Override

-    public MemberHasParent.Match toImmutable() {

-      return isMutable() ? newMatch(fM) : this;

-    }

-    

-    @Override

-    public String prettyPrint() {

-      StringBuilder result = new StringBuilder();

-      result.append("\"m\"=" + prettyPrintValue(fM));

-      return result.toString();

-    }

-    

-    @Override

-    public int hashCode() {

-      return Objects.hash(fM);

-    }

-    

-    @Override

-    public boolean equals(final Object obj) {

-      if (this == obj)

-          return true;

-      if (obj == null) {

-          return false;

-      }

-      if ((obj instanceof MemberHasParent.Match)) {

-          MemberHasParent.Match other = (MemberHasParent.Match) obj;

-          return Objects.equals(fM, other.fM);

-      } else {

-          // this should be infrequent

-          if (!(obj instanceof IPatternMatch)) {

-              return false;

-          }

-          IPatternMatch otherSig  = (IPatternMatch) obj;

-          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());

-      }

-    }

-    

-    @Override

-    public MemberHasParent specification() {

-      return MemberHasParent.instance();

-    }

-    

-    /**

-     * Returns an empty, mutable match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @return the empty match.

-     * 

-     */

-    public static MemberHasParent.Match newEmptyMatch() {

-      return new Mutable(null);

-    }

-    

-    /**

-     * Returns a mutable (partial) match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the new, mutable (partial) match object.

-     * 

-     */

-    public static MemberHasParent.Match newMutableMatch(final Member pM) {

-      return new Mutable(pM);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public static MemberHasParent.Match newMatch(final Member pM) {

-      return new Immutable(pM);

-    }

-    

-    private static final class Mutable extends MemberHasParent.Match {

-      Mutable(final Member pM) {

-        super(pM);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return true;

-      }

-    }

-    

-    private static final class Immutable extends MemberHasParent.Match {

-      Immutable(final Member pM) {

-        super(pM);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return false;

-      }

-    }

-  }

-  

-  /**

-   * Generated pattern matcher API of the queries.memberHasParent pattern,

-   * providing pattern-specific query methods.

-   * 

-   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},

-   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.

-   * 

-   * <p>Matches of the pattern will be represented as {@link Match}.

-   * 

-   * <p>Original source:

-   * <code><pre>

-   * pattern memberHasParent(m: Member) = {

-   *    Member.parents(m, _);

-   * }

-   * </pre></code>

-   * 

-   * @see Match

-   * @see MemberHasParent

-   * 

-   */

-  public static class Matcher extends BaseMatcher<MemberHasParent.Match> {

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    public static MemberHasParent.Matcher on(final ViatraQueryEngine engine) {

-      // check if matcher already exists

-      Matcher matcher = engine.getExistingMatcher(querySpecification());

-      if (matcher == null) {

-          matcher = (Matcher)engine.getMatcher(querySpecification());

-      }

-      return matcher;

-    }

-    

-    /**

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * @return an initialized matcher

-     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.

-     * 

-     */

-    public static MemberHasParent.Matcher create() {

-      return new Matcher();

-    }

-    

-    private static final int POSITION_M = 0;

-    

-    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(MemberHasParent.Matcher.class);

-    

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    private Matcher() {

-      super(querySpecification());

-    }

-    

-    /**

-     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return matches represented as a Match object.

-     * 

-     */

-    public Collection<MemberHasParent.Match> getAllMatches(final Member pM) {

-      return rawStreamAllMatches(new Object[]{pM}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return a stream of matches represented as a Match object.

-     * 

-     */

-    public Stream<MemberHasParent.Match> streamAllMatches(final Member pM) {

-      return rawStreamAllMatches(new Object[]{pM});

-    }

-    

-    /**

-     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return a match represented as a Match object, or null if no match is found.

-     * 

-     */

-    public Optional<MemberHasParent.Match> getOneArbitraryMatch(final Member pM) {

-      return rawGetOneArbitraryMatch(new Object[]{pM});

-    }

-    

-    /**

-     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,

-     * under any possible substitution of the unspecified parameters (if any).

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return true if the input is a valid (partial) match of the pattern.

-     * 

-     */

-    public boolean hasMatch(final Member pM) {

-      return rawHasMatch(new Object[]{pM});

-    }

-    

-    /**

-     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the number of pattern matches found.

-     * 

-     */

-    public int countMatches(final Member pM) {

-      return rawCountMatches(new Object[]{pM});

-    }

-    

-    /**

-     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param processor the action that will process the selected match.

-     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked

-     * 

-     */

-    public boolean forOneArbitraryMatch(final Member pM, final Consumer<? super MemberHasParent.Match> processor) {

-      return rawForOneArbitraryMatch(new Object[]{pM}, processor);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public MemberHasParent.Match newMatch(final Member pM) {

-      return MemberHasParent.Match.newMatch(pM);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray());

-    }

-    

-    @Override

-    protected MemberHasParent.Match tupleToMatch(final Tuple t) {

-      try {

-          return MemberHasParent.Match.newMatch((Member) t.get(POSITION_M));

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in tuple not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected MemberHasParent.Match arrayToMatch(final Object[] match) {

-      try {

-          return MemberHasParent.Match.newMatch((Member) match[POSITION_M]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected MemberHasParent.Match arrayToMatchMutable(final Object[] match) {

-      try {

-          return MemberHasParent.Match.newMutableMatch((Member) match[POSITION_M]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    /**

-     * @return the singleton instance of the query specification of this pattern

-     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-     * 

-     */

-    public static IQuerySpecification<MemberHasParent.Matcher> querySpecification() {

-      return MemberHasParent.instance();

-    }

-  }

-  

-  private MemberHasParent() {

-    super(GeneratedPQuery.INSTANCE);

-  }

-  

-  /**

-   * @return the singleton instance of the query specification

-   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-   * 

-   */

-  public static MemberHasParent instance() {

-    try{

-        return LazyHolder.INSTANCE;

-    } catch (ExceptionInInitializerError err) {

-        throw processInitializerError(err);

-    }

-  }

-  

-  @Override

-  protected MemberHasParent.Matcher instantiate(final ViatraQueryEngine engine) {

-    return MemberHasParent.Matcher.on(engine);

-  }

-  

-  @Override

-  public MemberHasParent.Matcher instantiate() {

-    return MemberHasParent.Matcher.create();

-  }

-  

-  @Override

-  public MemberHasParent.Match newEmptyMatch() {

-    return MemberHasParent.Match.newEmptyMatch();

-  }

-  

-  @Override

-  public MemberHasParent.Match newMatch(final Object... parameters) {

-    return MemberHasParent.Match.newMatch((familytree.Member) parameters[0]);

-  }

-  

-  /**

-   * Inner class allowing the singleton instance of {@link MemberHasParent} to be created 

-   *     <b>not</b> at the class load time of the outer class, 

-   *     but rather at the first call to {@link MemberHasParent#instance()}.

-   * 

-   * <p> This workaround is required e.g. to support recursion.

-   * 

-   */

-  private static class LazyHolder {

-    private static final MemberHasParent INSTANCE = new MemberHasParent();

-    

-    /**

-     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.

-     * This initialization order is required to support indirect recursion.

-     * 

-     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.

-     * 

-     */

-    private static final Object STATIC_INITIALIZER = ensureInitialized();

-    

-    public static Object ensureInitialized() {

-      INSTANCE.ensureInitializedInternal();

-      return null;

-    }

-  }

-  

-  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {

-    private static final MemberHasParent.GeneratedPQuery INSTANCE = new GeneratedPQuery();

-    

-    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final List<PParameter> parameters = Arrays.asList(parameter_m);

-    

-    private GeneratedPQuery() {

-      super(PVisibility.PUBLIC);

-    }

-    

-    @Override

-    public String getFullyQualifiedName() {

-      return "queries.memberHasParent";

-    }

-    

-    @Override

-    public List<String> getParameterNames() {

-      return Arrays.asList("m");

-    }

-    

-    @Override

-    public List<PParameter> getParameters() {

-      return parameters;

-    }

-    

-    @Override

-    public Set<PBody> doGetContainedBodies() {

-      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));

-      Set<PBody> bodies = new LinkedHashSet<>();

-      {

-          PBody body = new PBody(this);

-          PVariable var_m = body.getOrCreateVariableByName("m");

-          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(

-             new ExportedParameter(body, var_m, parameter_m)

-          ));

-          //    Member.parents(m, _)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_0_, var___0_);

-          bodies.add(body);

-      }

-      return bodies;

-    }

-  }

-}

+/**
+ * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql
+ */
+package queries;
+
+import familytree.Member;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern memberHasParent(m: Member) = {
+ *              Member.parents(m, _);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class MemberHasParent extends BaseGeneratedEMFQuerySpecification<MemberHasParent.Matcher> {
+  /**
+   * Pattern-specific match representation of the queries.memberHasParent pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Member fM;
+    
+    private static List<String> parameterNames = makeImmutableList("m");
+    
+    private Match(final Member pM) {
+      this.fM = pM;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "m": return this.fM;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fM;
+          default: return null;
+      }
+    }
+    
+    public Member getM() {
+      return this.fM;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("m".equals(parameterName) ) {
+          this.fM = (Member) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setM(final Member pM) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fM = pM;
+    }
+    
+    @Override
+    public String patternName() {
+      return "queries.memberHasParent";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return MemberHasParent.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fM};
+    }
+    
+    @Override
+    public MemberHasParent.Match toImmutable() {
+      return isMutable() ? newMatch(fM) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"m\"=" + prettyPrintValue(fM));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fM);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof MemberHasParent.Match)) {
+          MemberHasParent.Match other = (MemberHasParent.Match) obj;
+          return Objects.equals(fM, other.fM);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public MemberHasParent specification() {
+      return MemberHasParent.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static MemberHasParent.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static MemberHasParent.Match newMutableMatch(final Member pM) {
+      return new Mutable(pM);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static MemberHasParent.Match newMatch(final Member pM) {
+      return new Immutable(pM);
+    }
+    
+    private static final class Mutable extends MemberHasParent.Match {
+      Mutable(final Member pM) {
+        super(pM);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends MemberHasParent.Match {
+      Immutable(final Member pM) {
+        super(pM);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the queries.memberHasParent pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern memberHasParent(m: Member) = {
+   *    Member.parents(m, _);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see MemberHasParent
+   * 
+   */
+  public static class Matcher extends BaseMatcher<MemberHasParent.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static MemberHasParent.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static MemberHasParent.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_M = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(MemberHasParent.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<MemberHasParent.Match> getAllMatches(final Member pM) {
+      return rawStreamAllMatches(new Object[]{pM}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<MemberHasParent.Match> streamAllMatches(final Member pM) {
+      return rawStreamAllMatches(new Object[]{pM});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<MemberHasParent.Match> getOneArbitraryMatch(final Member pM) {
+      return rawGetOneArbitraryMatch(new Object[]{pM});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Member pM) {
+      return rawHasMatch(new Object[]{pM});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Member pM) {
+      return rawCountMatches(new Object[]{pM});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Member pM, final Consumer<? super MemberHasParent.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pM}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public MemberHasParent.Match newMatch(final Member pM) {
+      return MemberHasParent.Match.newMatch(pM);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray());
+    }
+    
+    @Override
+    protected MemberHasParent.Match tupleToMatch(final Tuple t) {
+      try {
+          return MemberHasParent.Match.newMatch((Member) t.get(POSITION_M));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected MemberHasParent.Match arrayToMatch(final Object[] match) {
+      try {
+          return MemberHasParent.Match.newMatch((Member) match[POSITION_M]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected MemberHasParent.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return MemberHasParent.Match.newMutableMatch((Member) match[POSITION_M]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<MemberHasParent.Matcher> querySpecification() {
+      return MemberHasParent.instance();
+    }
+  }
+  
+  private MemberHasParent() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static MemberHasParent instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected MemberHasParent.Matcher instantiate(final ViatraQueryEngine engine) {
+    return MemberHasParent.Matcher.on(engine);
+  }
+  
+  @Override
+  public MemberHasParent.Matcher instantiate() {
+    return MemberHasParent.Matcher.create();
+  }
+  
+  @Override
+  public MemberHasParent.Match newEmptyMatch() {
+    return MemberHasParent.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public MemberHasParent.Match newMatch(final Object... parameters) {
+    return MemberHasParent.Match.newMatch((familytree.Member) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link MemberHasParent} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link MemberHasParent#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final MemberHasParent INSTANCE = new MemberHasParent();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final MemberHasParent.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_m);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "queries.memberHasParent";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("m");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_m = body.getOrCreateVariableByName("m");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_m, parameter_m)
+          ));
+          //    Member.parents(m, _)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_0_, var___0_);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberIsItsOwnParent.java b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberIsItsOwnParent.java
index 67cdafb5..63cb882d 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberIsItsOwnParent.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/MemberIsItsOwnParent.java
@@ -1,577 +1,577 @@
-/**

- * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql

- */

-package queries;

-

-import familytree.Member;

-import java.util.Arrays;

-import java.util.Collection;

-import java.util.LinkedHashSet;

-import java.util.List;

-import java.util.Objects;

-import java.util.Optional;

-import java.util.Set;

-import java.util.function.Consumer;

-import java.util.stream.Collectors;

-import java.util.stream.Stream;

-import org.apache.log4j.Logger;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.viatra.query.runtime.api.IPatternMatch;

-import org.eclipse.viatra.query.runtime.api.IQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;

-import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;

-import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;

-import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;

-import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;

-import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;

-

-/**

- * A pattern-specific query specification that can instantiate Matcher in a type-safe way.

- * 

- * <p>Original source:

- *         <code><pre>

- *         {@literal @}Constraint(message="memberIsItsOwnParent", severity="error", key={m})

- *         pattern memberIsItsOwnParent(m: Member) = {

- *              FamilyTree.members(_, m);

- *              Member.parents(m, p);

- *              m == p;

- *         }

- * </pre></code>

- * 

- * @see Matcher

- * @see Match

- * 

- */

-@SuppressWarnings("all")

-public final class MemberIsItsOwnParent extends BaseGeneratedEMFQuerySpecification<MemberIsItsOwnParent.Matcher> {

-  /**

-   * Pattern-specific match representation of the queries.memberIsItsOwnParent pattern,

-   * to be used in conjunction with {@link Matcher}.

-   * 

-   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.

-   * Each instance is a (possibly partial) substitution of pattern parameters,

-   * usable to represent a match of the pattern in the result of a query,

-   * or to specify the bound (fixed) input parameters when issuing a query.

-   * 

-   * @see Matcher

-   * 

-   */

-  public static abstract class Match extends BasePatternMatch {

-    private Member fM;

-    

-    private static List<String> parameterNames = makeImmutableList("m");

-    

-    private Match(final Member pM) {

-      this.fM = pM;

-    }

-    

-    @Override

-    public Object get(final String parameterName) {

-      switch(parameterName) {

-          case "m": return this.fM;

-          default: return null;

-      }

-    }

-    

-    @Override

-    public Object get(final int index) {

-      switch(index) {

-          case 0: return this.fM;

-          default: return null;

-      }

-    }

-    

-    public Member getM() {

-      return this.fM;

-    }

-    

-    @Override

-    public boolean set(final String parameterName, final Object newValue) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      if ("m".equals(parameterName) ) {

-          this.fM = (Member) newValue;

-          return true;

-      }

-      return false;

-    }

-    

-    public void setM(final Member pM) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fM = pM;

-    }

-    

-    @Override

-    public String patternName() {

-      return "queries.memberIsItsOwnParent";

-    }

-    

-    @Override

-    public List<String> parameterNames() {

-      return MemberIsItsOwnParent.Match.parameterNames;

-    }

-    

-    @Override

-    public Object[] toArray() {

-      return new Object[]{fM};

-    }

-    

-    @Override

-    public MemberIsItsOwnParent.Match toImmutable() {

-      return isMutable() ? newMatch(fM) : this;

-    }

-    

-    @Override

-    public String prettyPrint() {

-      StringBuilder result = new StringBuilder();

-      result.append("\"m\"=" + prettyPrintValue(fM));

-      return result.toString();

-    }

-    

-    @Override

-    public int hashCode() {

-      return Objects.hash(fM);

-    }

-    

-    @Override

-    public boolean equals(final Object obj) {

-      if (this == obj)

-          return true;

-      if (obj == null) {

-          return false;

-      }

-      if ((obj instanceof MemberIsItsOwnParent.Match)) {

-          MemberIsItsOwnParent.Match other = (MemberIsItsOwnParent.Match) obj;

-          return Objects.equals(fM, other.fM);

-      } else {

-          // this should be infrequent

-          if (!(obj instanceof IPatternMatch)) {

-              return false;

-          }

-          IPatternMatch otherSig  = (IPatternMatch) obj;

-          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());

-      }

-    }

-    

-    @Override

-    public MemberIsItsOwnParent specification() {

-      return MemberIsItsOwnParent.instance();

-    }

-    

-    /**

-     * Returns an empty, mutable match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @return the empty match.

-     * 

-     */

-    public static MemberIsItsOwnParent.Match newEmptyMatch() {

-      return new Mutable(null);

-    }

-    

-    /**

-     * Returns a mutable (partial) match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the new, mutable (partial) match object.

-     * 

-     */

-    public static MemberIsItsOwnParent.Match newMutableMatch(final Member pM) {

-      return new Mutable(pM);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public static MemberIsItsOwnParent.Match newMatch(final Member pM) {

-      return new Immutable(pM);

-    }

-    

-    private static final class Mutable extends MemberIsItsOwnParent.Match {

-      Mutable(final Member pM) {

-        super(pM);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return true;

-      }

-    }

-    

-    private static final class Immutable extends MemberIsItsOwnParent.Match {

-      Immutable(final Member pM) {

-        super(pM);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return false;

-      }

-    }

-  }

-  

-  /**

-   * Generated pattern matcher API of the queries.memberIsItsOwnParent pattern,

-   * providing pattern-specific query methods.

-   * 

-   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},

-   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.

-   * 

-   * <p>Matches of the pattern will be represented as {@link Match}.

-   * 

-   * <p>Original source:

-   * <code><pre>

-   * {@literal @}Constraint(message="memberIsItsOwnParent", severity="error", key={m})

-   * pattern memberIsItsOwnParent(m: Member) = {

-   *    FamilyTree.members(_, m);

-   *    Member.parents(m, p);

-   *    m == p;

-   * }

-   * </pre></code>

-   * 

-   * @see Match

-   * @see MemberIsItsOwnParent

-   * 

-   */

-  public static class Matcher extends BaseMatcher<MemberIsItsOwnParent.Match> {

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    public static MemberIsItsOwnParent.Matcher on(final ViatraQueryEngine engine) {

-      // check if matcher already exists

-      Matcher matcher = engine.getExistingMatcher(querySpecification());

-      if (matcher == null) {

-          matcher = (Matcher)engine.getMatcher(querySpecification());

-      }

-      return matcher;

-    }

-    

-    /**

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * @return an initialized matcher

-     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.

-     * 

-     */

-    public static MemberIsItsOwnParent.Matcher create() {

-      return new Matcher();

-    }

-    

-    private static final int POSITION_M = 0;

-    

-    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(MemberIsItsOwnParent.Matcher.class);

-    

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    private Matcher() {

-      super(querySpecification());

-    }

-    

-    /**

-     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return matches represented as a Match object.

-     * 

-     */

-    public Collection<MemberIsItsOwnParent.Match> getAllMatches(final Member pM) {

-      return rawStreamAllMatches(new Object[]{pM}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return a stream of matches represented as a Match object.

-     * 

-     */

-    public Stream<MemberIsItsOwnParent.Match> streamAllMatches(final Member pM) {

-      return rawStreamAllMatches(new Object[]{pM});

-    }

-    

-    /**

-     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return a match represented as a Match object, or null if no match is found.

-     * 

-     */

-    public Optional<MemberIsItsOwnParent.Match> getOneArbitraryMatch(final Member pM) {

-      return rawGetOneArbitraryMatch(new Object[]{pM});

-    }

-    

-    /**

-     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,

-     * under any possible substitution of the unspecified parameters (if any).

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return true if the input is a valid (partial) match of the pattern.

-     * 

-     */

-    public boolean hasMatch(final Member pM) {

-      return rawHasMatch(new Object[]{pM});

-    }

-    

-    /**

-     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the number of pattern matches found.

-     * 

-     */

-    public int countMatches(final Member pM) {

-      return rawCountMatches(new Object[]{pM});

-    }

-    

-    /**

-     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param processor the action that will process the selected match.

-     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked

-     * 

-     */

-    public boolean forOneArbitraryMatch(final Member pM, final Consumer<? super MemberIsItsOwnParent.Match> processor) {

-      return rawForOneArbitraryMatch(new Object[]{pM}, processor);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public MemberIsItsOwnParent.Match newMatch(final Member pM) {

-      return MemberIsItsOwnParent.Match.newMatch(pM);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray());

-    }

-    

-    @Override

-    protected MemberIsItsOwnParent.Match tupleToMatch(final Tuple t) {

-      try {

-          return MemberIsItsOwnParent.Match.newMatch((Member) t.get(POSITION_M));

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in tuple not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected MemberIsItsOwnParent.Match arrayToMatch(final Object[] match) {

-      try {

-          return MemberIsItsOwnParent.Match.newMatch((Member) match[POSITION_M]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected MemberIsItsOwnParent.Match arrayToMatchMutable(final Object[] match) {

-      try {

-          return MemberIsItsOwnParent.Match.newMutableMatch((Member) match[POSITION_M]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    /**

-     * @return the singleton instance of the query specification of this pattern

-     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-     * 

-     */

-    public static IQuerySpecification<MemberIsItsOwnParent.Matcher> querySpecification() {

-      return MemberIsItsOwnParent.instance();

-    }

-  }

-  

-  private MemberIsItsOwnParent() {

-    super(GeneratedPQuery.INSTANCE);

-  }

-  

-  /**

-   * @return the singleton instance of the query specification

-   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-   * 

-   */

-  public static MemberIsItsOwnParent instance() {

-    try{

-        return LazyHolder.INSTANCE;

-    } catch (ExceptionInInitializerError err) {

-        throw processInitializerError(err);

-    }

-  }

-  

-  @Override

-  protected MemberIsItsOwnParent.Matcher instantiate(final ViatraQueryEngine engine) {

-    return MemberIsItsOwnParent.Matcher.on(engine);

-  }

-  

-  @Override

-  public MemberIsItsOwnParent.Matcher instantiate() {

-    return MemberIsItsOwnParent.Matcher.create();

-  }

-  

-  @Override

-  public MemberIsItsOwnParent.Match newEmptyMatch() {

-    return MemberIsItsOwnParent.Match.newEmptyMatch();

-  }

-  

-  @Override

-  public MemberIsItsOwnParent.Match newMatch(final Object... parameters) {

-    return MemberIsItsOwnParent.Match.newMatch((familytree.Member) parameters[0]);

-  }

-  

-  /**

-   * Inner class allowing the singleton instance of {@link MemberIsItsOwnParent} to be created 

-   *     <b>not</b> at the class load time of the outer class, 

-   *     but rather at the first call to {@link MemberIsItsOwnParent#instance()}.

-   * 

-   * <p> This workaround is required e.g. to support recursion.

-   * 

-   */

-  private static class LazyHolder {

-    private static final MemberIsItsOwnParent INSTANCE = new MemberIsItsOwnParent();

-    

-    /**

-     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.

-     * This initialization order is required to support indirect recursion.

-     * 

-     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.

-     * 

-     */

-    private static final Object STATIC_INITIALIZER = ensureInitialized();

-    

-    public static Object ensureInitialized() {

-      INSTANCE.ensureInitializedInternal();

-      return null;

-    }

-  }

-  

-  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {

-    private static final MemberIsItsOwnParent.GeneratedPQuery INSTANCE = new GeneratedPQuery();

-    

-    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final List<PParameter> parameters = Arrays.asList(parameter_m);

-    

-    private GeneratedPQuery() {

-      super(PVisibility.PUBLIC);

-    }

-    

-    @Override

-    public String getFullyQualifiedName() {

-      return "queries.memberIsItsOwnParent";

-    }

-    

-    @Override

-    public List<String> getParameterNames() {

-      return Arrays.asList("m");

-    }

-    

-    @Override

-    public List<PParameter> getParameters() {

-      return parameters;

-    }

-    

-    @Override

-    public Set<PBody> doGetContainedBodies() {

-      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));

-      Set<PBody> bodies = new LinkedHashSet<>();

-      {

-          PBody body = new PBody(this);

-          PVariable var_m = body.getOrCreateVariableByName("m");

-          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");

-          PVariable var_p = body.getOrCreateVariableByName("p");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(

-             new ExportedParameter(body, var_m, parameter_m)

-          ));

-          //    FamilyTree.members(_, m)

-          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "FamilyTree")));

-          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "FamilyTree", "members")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_0_, var_m);

-          //    Member.parents(m, p)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_1_, var_p);

-          //    m == p

-          new Equality(body, var_m, var_p);

-          bodies.add(body);

-      }

-      {

-          PAnnotation annotation = new PAnnotation("Constraint");

-          annotation.addAttribute("message", "memberIsItsOwnParent");

-          annotation.addAttribute("severity", "error");

-          annotation.addAttribute("key", Arrays.asList(new Object[] {

-                              new ParameterReference("m")

-                              }));

-          addAnnotation(annotation);

-      }

-      return bodies;

-    }

-  }

-}

+/**
+ * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql
+ */
+package queries;
+
+import familytree.Member;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message="memberIsItsOwnParent", severity="error", key={m})
+ *         pattern memberIsItsOwnParent(m: Member) = {
+ *              FamilyTree.members(_, m);
+ *              Member.parents(m, p);
+ *              m == p;
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class MemberIsItsOwnParent extends BaseGeneratedEMFQuerySpecification<MemberIsItsOwnParent.Matcher> {
+  /**
+   * Pattern-specific match representation of the queries.memberIsItsOwnParent pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Member fM;
+    
+    private static List<String> parameterNames = makeImmutableList("m");
+    
+    private Match(final Member pM) {
+      this.fM = pM;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "m": return this.fM;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fM;
+          default: return null;
+      }
+    }
+    
+    public Member getM() {
+      return this.fM;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("m".equals(parameterName) ) {
+          this.fM = (Member) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setM(final Member pM) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fM = pM;
+    }
+    
+    @Override
+    public String patternName() {
+      return "queries.memberIsItsOwnParent";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return MemberIsItsOwnParent.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fM};
+    }
+    
+    @Override
+    public MemberIsItsOwnParent.Match toImmutable() {
+      return isMutable() ? newMatch(fM) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"m\"=" + prettyPrintValue(fM));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fM);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof MemberIsItsOwnParent.Match)) {
+          MemberIsItsOwnParent.Match other = (MemberIsItsOwnParent.Match) obj;
+          return Objects.equals(fM, other.fM);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public MemberIsItsOwnParent specification() {
+      return MemberIsItsOwnParent.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static MemberIsItsOwnParent.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static MemberIsItsOwnParent.Match newMutableMatch(final Member pM) {
+      return new Mutable(pM);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static MemberIsItsOwnParent.Match newMatch(final Member pM) {
+      return new Immutable(pM);
+    }
+    
+    private static final class Mutable extends MemberIsItsOwnParent.Match {
+      Mutable(final Member pM) {
+        super(pM);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends MemberIsItsOwnParent.Match {
+      Immutable(final Member pM) {
+        super(pM);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the queries.memberIsItsOwnParent pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message="memberIsItsOwnParent", severity="error", key={m})
+   * pattern memberIsItsOwnParent(m: Member) = {
+   *    FamilyTree.members(_, m);
+   *    Member.parents(m, p);
+   *    m == p;
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see MemberIsItsOwnParent
+   * 
+   */
+  public static class Matcher extends BaseMatcher<MemberIsItsOwnParent.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static MemberIsItsOwnParent.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static MemberIsItsOwnParent.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_M = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(MemberIsItsOwnParent.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<MemberIsItsOwnParent.Match> getAllMatches(final Member pM) {
+      return rawStreamAllMatches(new Object[]{pM}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<MemberIsItsOwnParent.Match> streamAllMatches(final Member pM) {
+      return rawStreamAllMatches(new Object[]{pM});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<MemberIsItsOwnParent.Match> getOneArbitraryMatch(final Member pM) {
+      return rawGetOneArbitraryMatch(new Object[]{pM});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Member pM) {
+      return rawHasMatch(new Object[]{pM});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Member pM) {
+      return rawCountMatches(new Object[]{pM});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Member pM, final Consumer<? super MemberIsItsOwnParent.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pM}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public MemberIsItsOwnParent.Match newMatch(final Member pM) {
+      return MemberIsItsOwnParent.Match.newMatch(pM);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray());
+    }
+    
+    @Override
+    protected MemberIsItsOwnParent.Match tupleToMatch(final Tuple t) {
+      try {
+          return MemberIsItsOwnParent.Match.newMatch((Member) t.get(POSITION_M));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected MemberIsItsOwnParent.Match arrayToMatch(final Object[] match) {
+      try {
+          return MemberIsItsOwnParent.Match.newMatch((Member) match[POSITION_M]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected MemberIsItsOwnParent.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return MemberIsItsOwnParent.Match.newMutableMatch((Member) match[POSITION_M]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<MemberIsItsOwnParent.Matcher> querySpecification() {
+      return MemberIsItsOwnParent.instance();
+    }
+  }
+  
+  private MemberIsItsOwnParent() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static MemberIsItsOwnParent instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected MemberIsItsOwnParent.Matcher instantiate(final ViatraQueryEngine engine) {
+    return MemberIsItsOwnParent.Matcher.on(engine);
+  }
+  
+  @Override
+  public MemberIsItsOwnParent.Matcher instantiate() {
+    return MemberIsItsOwnParent.Matcher.create();
+  }
+  
+  @Override
+  public MemberIsItsOwnParent.Match newEmptyMatch() {
+    return MemberIsItsOwnParent.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public MemberIsItsOwnParent.Match newMatch(final Object... parameters) {
+    return MemberIsItsOwnParent.Match.newMatch((familytree.Member) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link MemberIsItsOwnParent} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link MemberIsItsOwnParent#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final MemberIsItsOwnParent INSTANCE = new MemberIsItsOwnParent();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final MemberIsItsOwnParent.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_m);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "queries.memberIsItsOwnParent";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("m");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_m = body.getOrCreateVariableByName("m");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          PVariable var_p = body.getOrCreateVariableByName("p");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_m, parameter_m)
+          ));
+          //    FamilyTree.members(_, m)
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "FamilyTree")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "FamilyTree", "members")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_0_, var_m);
+          //    Member.parents(m, p)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_1_, var_p);
+          //    m == p
+          new Equality(body, var_m, var_p);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "memberIsItsOwnParent");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("m")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java
index e90186e2..726ab7e4 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java
@@ -1,775 +1,775 @@
-/**

- * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql

- */

-package queries;

-

-import familytree.Member;

-import java.util.Arrays;

-import java.util.Collection;

-import java.util.LinkedHashSet;

-import java.util.List;

-import java.util.Objects;

-import java.util.Optional;

-import java.util.Set;

-import java.util.function.Consumer;

-import java.util.stream.Collectors;

-import java.util.stream.Stream;

-import org.apache.log4j.Logger;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.emf.ecore.EDataType;

-import org.eclipse.viatra.query.runtime.api.IPatternMatch;

-import org.eclipse.viatra.query.runtime.api.IQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;

-import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;

-import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;

-import org.eclipse.viatra.query.runtime.emf.types.EDataTypeInSlotsKey;

-import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;

-import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.IExpressionEvaluator;

-import org.eclipse.viatra.query.runtime.matchers.psystem.IValueProvider;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExpressionEvaluation;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;

-import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;

-

-/**

- * A pattern-specific query specification that can instantiate Matcher in a type-safe way.

- * 

- * <p>Original source:

- *         <code><pre>

- *         {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})

- *         pattern parentTooYoung(m: Member, p: Member) = {

- *              FamilyTree.members(_, m);

- *              Member.parents(m, p);

- *              Member.age(m, mAge);

- *              Member.age(p, pAge);

- *              check (mAge {@literal <}= (pAge + 12));

- *         }

- * </pre></code>

- * 

- * @see Matcher

- * @see Match

- * 

- */

-@SuppressWarnings("all")

-public final class ParentTooYoung extends BaseGeneratedEMFQuerySpecification<ParentTooYoung.Matcher> {

-  /**

-   * Pattern-specific match representation of the queries.parentTooYoung pattern,

-   * to be used in conjunction with {@link Matcher}.

-   * 

-   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.

-   * Each instance is a (possibly partial) substitution of pattern parameters,

-   * usable to represent a match of the pattern in the result of a query,

-   * or to specify the bound (fixed) input parameters when issuing a query.

-   * 

-   * @see Matcher

-   * 

-   */

-  public static abstract class Match extends BasePatternMatch {

-    private Member fM;

-    

-    private Member fP;

-    

-    private static List<String> parameterNames = makeImmutableList("m", "p");

-    

-    private Match(final Member pM, final Member pP) {

-      this.fM = pM;

-      this.fP = pP;

-    }

-    

-    @Override

-    public Object get(final String parameterName) {

-      switch(parameterName) {

-          case "m": return this.fM;

-          case "p": return this.fP;

-          default: return null;

-      }

-    }

-    

-    @Override

-    public Object get(final int index) {

-      switch(index) {

-          case 0: return this.fM;

-          case 1: return this.fP;

-          default: return null;

-      }

-    }

-    

-    public Member getM() {

-      return this.fM;

-    }

-    

-    public Member getP() {

-      return this.fP;

-    }

-    

-    @Override

-    public boolean set(final String parameterName, final Object newValue) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      if ("m".equals(parameterName) ) {

-          this.fM = (Member) newValue;

-          return true;

-      }

-      if ("p".equals(parameterName) ) {

-          this.fP = (Member) newValue;

-          return true;

-      }

-      return false;

-    }

-    

-    public void setM(final Member pM) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fM = pM;

-    }

-    

-    public void setP(final Member pP) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fP = pP;

-    }

-    

-    @Override

-    public String patternName() {

-      return "queries.parentTooYoung";

-    }

-    

-    @Override

-    public List<String> parameterNames() {

-      return ParentTooYoung.Match.parameterNames;

-    }

-    

-    @Override

-    public Object[] toArray() {

-      return new Object[]{fM, fP};

-    }

-    

-    @Override

-    public ParentTooYoung.Match toImmutable() {

-      return isMutable() ? newMatch(fM, fP) : this;

-    }

-    

-    @Override

-    public String prettyPrint() {

-      StringBuilder result = new StringBuilder();

-      result.append("\"m\"=" + prettyPrintValue(fM) + ", ");

-      result.append("\"p\"=" + prettyPrintValue(fP));

-      return result.toString();

-    }

-    

-    @Override

-    public int hashCode() {

-      return Objects.hash(fM, fP);

-    }

-    

-    @Override

-    public boolean equals(final Object obj) {

-      if (this == obj)

-          return true;

-      if (obj == null) {

-          return false;

-      }

-      if ((obj instanceof ParentTooYoung.Match)) {

-          ParentTooYoung.Match other = (ParentTooYoung.Match) obj;

-          return Objects.equals(fM, other.fM) && Objects.equals(fP, other.fP);

-      } else {

-          // this should be infrequent

-          if (!(obj instanceof IPatternMatch)) {

-              return false;

-          }

-          IPatternMatch otherSig  = (IPatternMatch) obj;

-          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());

-      }

-    }

-    

-    @Override

-    public ParentTooYoung specification() {

-      return ParentTooYoung.instance();

-    }

-    

-    /**

-     * Returns an empty, mutable match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @return the empty match.

-     * 

-     */

-    public static ParentTooYoung.Match newEmptyMatch() {

-      return new Mutable(null, null);

-    }

-    

-    /**

-     * Returns a mutable (partial) match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the new, mutable (partial) match object.

-     * 

-     */

-    public static ParentTooYoung.Match newMutableMatch(final Member pM, final Member pP) {

-      return new Mutable(pM, pP);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public static ParentTooYoung.Match newMatch(final Member pM, final Member pP) {

-      return new Immutable(pM, pP);

-    }

-    

-    private static final class Mutable extends ParentTooYoung.Match {

-      Mutable(final Member pM, final Member pP) {

-        super(pM, pP);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return true;

-      }

-    }

-    

-    private static final class Immutable extends ParentTooYoung.Match {

-      Immutable(final Member pM, final Member pP) {

-        super(pM, pP);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return false;

-      }

-    }

-  }

-  

-  /**

-   * Generated pattern matcher API of the queries.parentTooYoung pattern,

-   * providing pattern-specific query methods.

-   * 

-   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},

-   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.

-   * 

-   * <p>Matches of the pattern will be represented as {@link Match}.

-   * 

-   * <p>Original source:

-   * <code><pre>

-   * {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})

-   * pattern parentTooYoung(m: Member, p: Member) = {

-   *    FamilyTree.members(_, m);

-   *    Member.parents(m, p);

-   *    Member.age(m, mAge);

-   *    Member.age(p, pAge);

-   *    check (mAge {@literal <}= (pAge + 12));

-   * }

-   * </pre></code>

-   * 

-   * @see Match

-   * @see ParentTooYoung

-   * 

-   */

-  public static class Matcher extends BaseMatcher<ParentTooYoung.Match> {

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    public static ParentTooYoung.Matcher on(final ViatraQueryEngine engine) {

-      // check if matcher already exists

-      Matcher matcher = engine.getExistingMatcher(querySpecification());

-      if (matcher == null) {

-          matcher = (Matcher)engine.getMatcher(querySpecification());

-      }

-      return matcher;

-    }

-    

-    /**

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * @return an initialized matcher

-     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.

-     * 

-     */

-    public static ParentTooYoung.Matcher create() {

-      return new Matcher();

-    }

-    

-    private static final int POSITION_M = 0;

-    

-    private static final int POSITION_P = 1;

-    

-    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ParentTooYoung.Matcher.class);

-    

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    private Matcher() {

-      super(querySpecification());

-    }

-    

-    /**

-     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return matches represented as a Match object.

-     * 

-     */

-    public Collection<ParentTooYoung.Match> getAllMatches(final Member pM, final Member pP) {

-      return rawStreamAllMatches(new Object[]{pM, pP}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return a stream of matches represented as a Match object.

-     * 

-     */

-    public Stream<ParentTooYoung.Match> streamAllMatches(final Member pM, final Member pP) {

-      return rawStreamAllMatches(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return a match represented as a Match object, or null if no match is found.

-     * 

-     */

-    public Optional<ParentTooYoung.Match> getOneArbitraryMatch(final Member pM, final Member pP) {

-      return rawGetOneArbitraryMatch(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,

-     * under any possible substitution of the unspecified parameters (if any).

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return true if the input is a valid (partial) match of the pattern.

-     * 

-     */

-    public boolean hasMatch(final Member pM, final Member pP) {

-      return rawHasMatch(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the number of pattern matches found.

-     * 

-     */

-    public int countMatches(final Member pM, final Member pP) {

-      return rawCountMatches(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @param processor the action that will process the selected match.

-     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked

-     * 

-     */

-    public boolean forOneArbitraryMatch(final Member pM, final Member pP, final Consumer<? super ParentTooYoung.Match> processor) {

-      return rawForOneArbitraryMatch(new Object[]{pM, pP}, processor);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public ParentTooYoung.Match newMatch(final Member pM, final Member pP) {

-      return ParentTooYoung.Match.newMatch(pM, pP);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfm(partialMatch.toArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm(final Member pP) {

-      return rawStreamAllValuesOfm(new Object[]{null, pP});

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfm(partialMatch.toArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm(final Member pP) {

-      return rawStreamAllValuesOfm(new Object[]{null, pP}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfp(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_P, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfp() {

-      return rawStreamAllValuesOfp(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfp() {

-      return rawStreamAllValuesOfp(emptyArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfp(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfp(partialMatch.toArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfp(final Member pM) {

-      return rawStreamAllValuesOfp(new Object[]{pM, null});

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfp(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfp(partialMatch.toArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfp(final Member pM) {

-      return rawStreamAllValuesOfp(new Object[]{pM, null}).collect(Collectors.toSet());

-    }

-    

-    @Override

-    protected ParentTooYoung.Match tupleToMatch(final Tuple t) {

-      try {

-          return ParentTooYoung.Match.newMatch((Member) t.get(POSITION_M), (Member) t.get(POSITION_P));

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in tuple not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected ParentTooYoung.Match arrayToMatch(final Object[] match) {

-      try {

-          return ParentTooYoung.Match.newMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected ParentTooYoung.Match arrayToMatchMutable(final Object[] match) {

-      try {

-          return ParentTooYoung.Match.newMutableMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    /**

-     * @return the singleton instance of the query specification of this pattern

-     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-     * 

-     */

-    public static IQuerySpecification<ParentTooYoung.Matcher> querySpecification() {

-      return ParentTooYoung.instance();

-    }

-  }

-  

-  private ParentTooYoung() {

-    super(GeneratedPQuery.INSTANCE);

-  }

-  

-  /**

-   * @return the singleton instance of the query specification

-   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-   * 

-   */

-  public static ParentTooYoung instance() {

-    try{

-        return LazyHolder.INSTANCE;

-    } catch (ExceptionInInitializerError err) {

-        throw processInitializerError(err);

-    }

-  }

-  

-  @Override

-  protected ParentTooYoung.Matcher instantiate(final ViatraQueryEngine engine) {

-    return ParentTooYoung.Matcher.on(engine);

-  }

-  

-  @Override

-  public ParentTooYoung.Matcher instantiate() {

-    return ParentTooYoung.Matcher.create();

-  }

-  

-  @Override

-  public ParentTooYoung.Match newEmptyMatch() {

-    return ParentTooYoung.Match.newEmptyMatch();

-  }

-  

-  @Override

-  public ParentTooYoung.Match newMatch(final Object... parameters) {

-    return ParentTooYoung.Match.newMatch((familytree.Member) parameters[0], (familytree.Member) parameters[1]);

-  }

-  

-  /**

-   * Inner class allowing the singleton instance of {@link ParentTooYoung} to be created 

-   *     <b>not</b> at the class load time of the outer class, 

-   *     but rather at the first call to {@link ParentTooYoung#instance()}.

-   * 

-   * <p> This workaround is required e.g. to support recursion.

-   * 

-   */

-  private static class LazyHolder {

-    private static final ParentTooYoung INSTANCE = new ParentTooYoung();

-    

-    /**

-     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.

-     * This initialization order is required to support indirect recursion.

-     * 

-     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.

-     * 

-     */

-    private static final Object STATIC_INITIALIZER = ensureInitialized();

-    

-    public static Object ensureInitialized() {

-      INSTANCE.ensureInitializedInternal();

-      return null;

-    }

-  }

-  

-  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {

-    private static final ParentTooYoung.GeneratedPQuery INSTANCE = new GeneratedPQuery();

-    

-    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final PParameter parameter_p = new PParameter("p", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final List<PParameter> parameters = Arrays.asList(parameter_m, parameter_p);

-    

-    private GeneratedPQuery() {

-      super(PVisibility.PUBLIC);

-    }

-    

-    @Override

-    public String getFullyQualifiedName() {

-      return "queries.parentTooYoung";

-    }

-    

-    @Override

-    public List<String> getParameterNames() {

-      return Arrays.asList("m","p");

-    }

-    

-    @Override

-    public List<PParameter> getParameters() {

-      return parameters;

-    }

-    

-    @Override

-    public Set<PBody> doGetContainedBodies() {

-      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));

-      Set<PBody> bodies = new LinkedHashSet<>();

-      {

-          PBody body = new PBody(this);

-          PVariable var_m = body.getOrCreateVariableByName("m");

-          PVariable var_p = body.getOrCreateVariableByName("p");

-          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");

-          PVariable var_mAge = body.getOrCreateVariableByName("mAge");

-          PVariable var_pAge = body.getOrCreateVariableByName("pAge");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(

-             new ExportedParameter(body, var_m, parameter_m),

-             new ExportedParameter(body, var_p, parameter_p)

-          ));

-          //    FamilyTree.members(_, m)

-          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "FamilyTree")));

-          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "FamilyTree", "members")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_0_, var_m);

-          //    Member.parents(m, p)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_1_, var_p);

-          //    Member.age(m, mAge)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_2_ = body.getOrCreateVariableByName(".virtual{2}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_2_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_2_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));

-          new Equality(body, var__virtual_2_, var_mAge);

-          //    Member.age(p, pAge)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_3_ = body.getOrCreateVariableByName(".virtual{3}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_p, var__virtual_3_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_3_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));

-          new Equality(body, var__virtual_3_, var_pAge);

-          //    check (mAge <= (pAge + 12))

-          new ExpressionEvaluation(body, new IExpressionEvaluator() {

-          

-              @Override

-              public String getShortDescription() {

-                  return "Expression evaluation from pattern parentTooYoung";

-              }

-              

-              @Override

-              public Iterable<String> getInputParameterNames() {

-                  return Arrays.asList("mAge", "pAge");}

-          

-              @Override

-              public Object evaluateExpression(IValueProvider provider) throws Exception {

-                  Integer mAge = (Integer) provider.getValue("mAge");

-                  Integer pAge = (Integer) provider.getValue("pAge");

-                  return evaluateExpression_1_1(mAge, pAge);

-              }

-          },  null); 

-          bodies.add(body);

-      }

-      {

-          PAnnotation annotation = new PAnnotation("Constraint");

-          annotation.addAttribute("message", "parentTooYoung");

-          annotation.addAttribute("severity", "error");

-          annotation.addAttribute("key", Arrays.asList(new Object[] {

-                              new ParameterReference("m"), 

-                              new ParameterReference("p")

-                              }));

-          addAnnotation(annotation);

-      }

-      return bodies;

-    }

-  }

-  

-  private static boolean evaluateExpression_1_1(final Integer mAge, final Integer pAge) {

-    return ((mAge).intValue() <= ((pAge).intValue() + 12));

-  }

-}

+/**
+ * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql
+ */
+package queries;
+
+import familytree.Member;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EDataType;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EDataTypeInSlotsKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.IExpressionEvaluator;
+import org.eclipse.viatra.query.runtime.matchers.psystem.IValueProvider;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExpressionEvaluation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})
+ *         pattern parentTooYoung(m: Member, p: Member) = {
+ *              FamilyTree.members(_, m);
+ *              Member.parents(m, p);
+ *              Member.age(m, mAge);
+ *              Member.age(p, pAge);
+ *              check (mAge {@literal <}= (pAge + 12));
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ParentTooYoung extends BaseGeneratedEMFQuerySpecification<ParentTooYoung.Matcher> {
+  /**
+   * Pattern-specific match representation of the queries.parentTooYoung pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Member fM;
+    
+    private Member fP;
+    
+    private static List<String> parameterNames = makeImmutableList("m", "p");
+    
+    private Match(final Member pM, final Member pP) {
+      this.fM = pM;
+      this.fP = pP;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "m": return this.fM;
+          case "p": return this.fP;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fM;
+          case 1: return this.fP;
+          default: return null;
+      }
+    }
+    
+    public Member getM() {
+      return this.fM;
+    }
+    
+    public Member getP() {
+      return this.fP;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("m".equals(parameterName) ) {
+          this.fM = (Member) newValue;
+          return true;
+      }
+      if ("p".equals(parameterName) ) {
+          this.fP = (Member) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setM(final Member pM) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fM = pM;
+    }
+    
+    public void setP(final Member pP) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fP = pP;
+    }
+    
+    @Override
+    public String patternName() {
+      return "queries.parentTooYoung";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ParentTooYoung.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fM, fP};
+    }
+    
+    @Override
+    public ParentTooYoung.Match toImmutable() {
+      return isMutable() ? newMatch(fM, fP) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"m\"=" + prettyPrintValue(fM) + ", ");
+      result.append("\"p\"=" + prettyPrintValue(fP));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fM, fP);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ParentTooYoung.Match)) {
+          ParentTooYoung.Match other = (ParentTooYoung.Match) obj;
+          return Objects.equals(fM, other.fM) && Objects.equals(fP, other.fP);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ParentTooYoung specification() {
+      return ParentTooYoung.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ParentTooYoung.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ParentTooYoung.Match newMutableMatch(final Member pM, final Member pP) {
+      return new Mutable(pM, pP);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ParentTooYoung.Match newMatch(final Member pM, final Member pP) {
+      return new Immutable(pM, pP);
+    }
+    
+    private static final class Mutable extends ParentTooYoung.Match {
+      Mutable(final Member pM, final Member pP) {
+        super(pM, pP);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ParentTooYoung.Match {
+      Immutable(final Member pM, final Member pP) {
+        super(pM, pP);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the queries.parentTooYoung pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})
+   * pattern parentTooYoung(m: Member, p: Member) = {
+   *    FamilyTree.members(_, m);
+   *    Member.parents(m, p);
+   *    Member.age(m, mAge);
+   *    Member.age(p, pAge);
+   *    check (mAge {@literal <}= (pAge + 12));
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ParentTooYoung
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ParentTooYoung.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ParentTooYoung.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ParentTooYoung.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_M = 0;
+    
+    private static final int POSITION_P = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ParentTooYoung.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ParentTooYoung.Match> getAllMatches(final Member pM, final Member pP) {
+      return rawStreamAllMatches(new Object[]{pM, pP}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ParentTooYoung.Match> streamAllMatches(final Member pM, final Member pP) {
+      return rawStreamAllMatches(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ParentTooYoung.Match> getOneArbitraryMatch(final Member pM, final Member pP) {
+      return rawGetOneArbitraryMatch(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Member pM, final Member pP) {
+      return rawHasMatch(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Member pM, final Member pP) {
+      return rawCountMatches(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Member pM, final Member pP, final Consumer<? super ParentTooYoung.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pM, pP}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ParentTooYoung.Match newMatch(final Member pM, final Member pP) {
+      return ParentTooYoung.Match.newMatch(pM, pP);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfm(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm(final Member pP) {
+      return rawStreamAllValuesOfm(new Object[]{null, pP});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfm(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm(final Member pP) {
+      return rawStreamAllValuesOfm(new Object[]{null, pP}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfp(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_P, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfp() {
+      return rawStreamAllValuesOfp(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfp() {
+      return rawStreamAllValuesOfp(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfp(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfp(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfp(final Member pM) {
+      return rawStreamAllValuesOfp(new Object[]{pM, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfp(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfp(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfp(final Member pM) {
+      return rawStreamAllValuesOfp(new Object[]{pM, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ParentTooYoung.Match tupleToMatch(final Tuple t) {
+      try {
+          return ParentTooYoung.Match.newMatch((Member) t.get(POSITION_M), (Member) t.get(POSITION_P));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ParentTooYoung.Match arrayToMatch(final Object[] match) {
+      try {
+          return ParentTooYoung.Match.newMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ParentTooYoung.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ParentTooYoung.Match.newMutableMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ParentTooYoung.Matcher> querySpecification() {
+      return ParentTooYoung.instance();
+    }
+  }
+  
+  private ParentTooYoung() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ParentTooYoung instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ParentTooYoung.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ParentTooYoung.Matcher.on(engine);
+  }
+  
+  @Override
+  public ParentTooYoung.Matcher instantiate() {
+    return ParentTooYoung.Matcher.create();
+  }
+  
+  @Override
+  public ParentTooYoung.Match newEmptyMatch() {
+    return ParentTooYoung.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ParentTooYoung.Match newMatch(final Object... parameters) {
+    return ParentTooYoung.Match.newMatch((familytree.Member) parameters[0], (familytree.Member) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ParentTooYoung} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ParentTooYoung#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ParentTooYoung INSTANCE = new ParentTooYoung();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ParentTooYoung.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_p = new PParameter("p", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_m, parameter_p);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "queries.parentTooYoung";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("m","p");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_m = body.getOrCreateVariableByName("m");
+          PVariable var_p = body.getOrCreateVariableByName("p");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          PVariable var_mAge = body.getOrCreateVariableByName("mAge");
+          PVariable var_pAge = body.getOrCreateVariableByName("pAge");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_m, parameter_m),
+             new ExportedParameter(body, var_p, parameter_p)
+          ));
+          //    FamilyTree.members(_, m)
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "FamilyTree")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "FamilyTree", "members")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_0_, var_m);
+          //    Member.parents(m, p)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_1_, var_p);
+          //    Member.age(m, mAge)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_2_ = body.getOrCreateVariableByName(".virtual{2}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_2_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_2_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));
+          new Equality(body, var__virtual_2_, var_mAge);
+          //    Member.age(p, pAge)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_3_ = body.getOrCreateVariableByName(".virtual{3}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_p, var__virtual_3_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_3_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));
+          new Equality(body, var__virtual_3_, var_pAge);
+          //    check (mAge <= (pAge + 12))
+          new ExpressionEvaluation(body, new IExpressionEvaluator() {
+          
+              @Override
+              public String getShortDescription() {
+                  return "Expression evaluation from pattern parentTooYoung";
+              }
+              
+              @Override
+              public Iterable<String> getInputParameterNames() {
+                  return Arrays.asList("mAge", "pAge");}
+          
+              @Override
+              public Object evaluateExpression(IValueProvider provider) throws Exception {
+                  Integer mAge = (Integer) provider.getValue("mAge");
+                  Integer pAge = (Integer) provider.getValue("pAge");
+                  return evaluateExpression_1_1(mAge, pAge);
+              }
+          },  null); 
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "parentTooYoung");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("m"), 
+                              new ParameterReference("p")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+  
+  private static boolean evaluateExpression_1_1(final Integer mAge, final Integer pAge) {
+    return ((mAge).intValue() <= ((pAge).intValue() + 12));
+  }
+}
diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/TwoMembersHaveNoParent.java b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/TwoMembersHaveNoParent.java
index 58ad57a6..365939dd 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/TwoMembersHaveNoParent.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/TwoMembersHaveNoParent.java
@@ -1,723 +1,723 @@
-/**

- * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql

- */

-package queries;

-

-import familytree.Member;

-import java.util.Arrays;

-import java.util.Collection;

-import java.util.LinkedHashSet;

-import java.util.List;

-import java.util.Objects;

-import java.util.Optional;

-import java.util.Set;

-import java.util.function.Consumer;

-import java.util.stream.Collectors;

-import java.util.stream.Stream;

-import org.apache.log4j.Logger;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.viatra.query.runtime.api.IPatternMatch;

-import org.eclipse.viatra.query.runtime.api.IQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;

-import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;

-import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;

-import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;

-import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;

-import queries.MemberHasParent;

-

-/**

- * A pattern-specific query specification that can instantiate Matcher in a type-safe way.

- * 

- * <p>Original source:

- *         <code><pre>

- *         {@literal @}Constraint(message="twoMembersHaveNoParent", severity="error", key={m1, m2})

- *         pattern twoMembersHaveNoParent(m1:Member, m2:Member) = {

- *              neg find memberHasParent(m1);

- *              neg find memberHasParent(m2);

- *              m1 != m2;

- *         }

- * </pre></code>

- * 

- * @see Matcher

- * @see Match

- * 

- */

-@SuppressWarnings("all")

-public final class TwoMembersHaveNoParent extends BaseGeneratedEMFQuerySpecification<TwoMembersHaveNoParent.Matcher> {

-  /**

-   * Pattern-specific match representation of the queries.twoMembersHaveNoParent pattern,

-   * to be used in conjunction with {@link Matcher}.

-   * 

-   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.

-   * Each instance is a (possibly partial) substitution of pattern parameters,

-   * usable to represent a match of the pattern in the result of a query,

-   * or to specify the bound (fixed) input parameters when issuing a query.

-   * 

-   * @see Matcher

-   * 

-   */

-  public static abstract class Match extends BasePatternMatch {

-    private Member fM1;

-    

-    private Member fM2;

-    

-    private static List<String> parameterNames = makeImmutableList("m1", "m2");

-    

-    private Match(final Member pM1, final Member pM2) {

-      this.fM1 = pM1;

-      this.fM2 = pM2;

-    }

-    

-    @Override

-    public Object get(final String parameterName) {

-      switch(parameterName) {

-          case "m1": return this.fM1;

-          case "m2": return this.fM2;

-          default: return null;

-      }

-    }

-    

-    @Override

-    public Object get(final int index) {

-      switch(index) {

-          case 0: return this.fM1;

-          case 1: return this.fM2;

-          default: return null;

-      }

-    }

-    

-    public Member getM1() {

-      return this.fM1;

-    }

-    

-    public Member getM2() {

-      return this.fM2;

-    }

-    

-    @Override

-    public boolean set(final String parameterName, final Object newValue) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      if ("m1".equals(parameterName) ) {

-          this.fM1 = (Member) newValue;

-          return true;

-      }

-      if ("m2".equals(parameterName) ) {

-          this.fM2 = (Member) newValue;

-          return true;

-      }

-      return false;

-    }

-    

-    public void setM1(final Member pM1) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fM1 = pM1;

-    }

-    

-    public void setM2(final Member pM2) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fM2 = pM2;

-    }

-    

-    @Override

-    public String patternName() {

-      return "queries.twoMembersHaveNoParent";

-    }

-    

-    @Override

-    public List<String> parameterNames() {

-      return TwoMembersHaveNoParent.Match.parameterNames;

-    }

-    

-    @Override

-    public Object[] toArray() {

-      return new Object[]{fM1, fM2};

-    }

-    

-    @Override

-    public TwoMembersHaveNoParent.Match toImmutable() {

-      return isMutable() ? newMatch(fM1, fM2) : this;

-    }

-    

-    @Override

-    public String prettyPrint() {

-      StringBuilder result = new StringBuilder();

-      result.append("\"m1\"=" + prettyPrintValue(fM1) + ", ");

-      result.append("\"m2\"=" + prettyPrintValue(fM2));

-      return result.toString();

-    }

-    

-    @Override

-    public int hashCode() {

-      return Objects.hash(fM1, fM2);

-    }

-    

-    @Override

-    public boolean equals(final Object obj) {

-      if (this == obj)

-          return true;

-      if (obj == null) {

-          return false;

-      }

-      if ((obj instanceof TwoMembersHaveNoParent.Match)) {

-          TwoMembersHaveNoParent.Match other = (TwoMembersHaveNoParent.Match) obj;

-          return Objects.equals(fM1, other.fM1) && Objects.equals(fM2, other.fM2);

-      } else {

-          // this should be infrequent

-          if (!(obj instanceof IPatternMatch)) {

-              return false;

-          }

-          IPatternMatch otherSig  = (IPatternMatch) obj;

-          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());

-      }

-    }

-    

-    @Override

-    public TwoMembersHaveNoParent specification() {

-      return TwoMembersHaveNoParent.instance();

-    }

-    

-    /**

-     * Returns an empty, mutable match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @return the empty match.

-     * 

-     */

-    public static TwoMembersHaveNoParent.Match newEmptyMatch() {

-      return new Mutable(null, null);

-    }

-    

-    /**

-     * Returns a mutable (partial) match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return the new, mutable (partial) match object.

-     * 

-     */

-    public static TwoMembersHaveNoParent.Match newMutableMatch(final Member pM1, final Member pM2) {

-      return new Mutable(pM1, pM2);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public static TwoMembersHaveNoParent.Match newMatch(final Member pM1, final Member pM2) {

-      return new Immutable(pM1, pM2);

-    }

-    

-    private static final class Mutable extends TwoMembersHaveNoParent.Match {

-      Mutable(final Member pM1, final Member pM2) {

-        super(pM1, pM2);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return true;

-      }

-    }

-    

-    private static final class Immutable extends TwoMembersHaveNoParent.Match {

-      Immutable(final Member pM1, final Member pM2) {

-        super(pM1, pM2);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return false;

-      }

-    }

-  }

-  

-  /**

-   * Generated pattern matcher API of the queries.twoMembersHaveNoParent pattern,

-   * providing pattern-specific query methods.

-   * 

-   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},

-   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.

-   * 

-   * <p>Matches of the pattern will be represented as {@link Match}.

-   * 

-   * <p>Original source:

-   * <code><pre>

-   * {@literal @}Constraint(message="twoMembersHaveNoParent", severity="error", key={m1, m2})

-   * pattern twoMembersHaveNoParent(m1:Member, m2:Member) = {

-   *    neg find memberHasParent(m1);

-   *    neg find memberHasParent(m2);

-   *    m1 != m2;

-   * }

-   * </pre></code>

-   * 

-   * @see Match

-   * @see TwoMembersHaveNoParent

-   * 

-   */

-  public static class Matcher extends BaseMatcher<TwoMembersHaveNoParent.Match> {

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    public static TwoMembersHaveNoParent.Matcher on(final ViatraQueryEngine engine) {

-      // check if matcher already exists

-      Matcher matcher = engine.getExistingMatcher(querySpecification());

-      if (matcher == null) {

-          matcher = (Matcher)engine.getMatcher(querySpecification());

-      }

-      return matcher;

-    }

-    

-    /**

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * @return an initialized matcher

-     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.

-     * 

-     */

-    public static TwoMembersHaveNoParent.Matcher create() {

-      return new Matcher();

-    }

-    

-    private static final int POSITION_M1 = 0;

-    

-    private static final int POSITION_M2 = 1;

-    

-    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TwoMembersHaveNoParent.Matcher.class);

-    

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    private Matcher() {

-      super(querySpecification());

-    }

-    

-    /**

-     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return matches represented as a Match object.

-     * 

-     */

-    public Collection<TwoMembersHaveNoParent.Match> getAllMatches(final Member pM1, final Member pM2) {

-      return rawStreamAllMatches(new Object[]{pM1, pM2}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return a stream of matches represented as a Match object.

-     * 

-     */

-    public Stream<TwoMembersHaveNoParent.Match> streamAllMatches(final Member pM1, final Member pM2) {

-      return rawStreamAllMatches(new Object[]{pM1, pM2});

-    }

-    

-    /**

-     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return a match represented as a Match object, or null if no match is found.

-     * 

-     */

-    public Optional<TwoMembersHaveNoParent.Match> getOneArbitraryMatch(final Member pM1, final Member pM2) {

-      return rawGetOneArbitraryMatch(new Object[]{pM1, pM2});

-    }

-    

-    /**

-     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,

-     * under any possible substitution of the unspecified parameters (if any).

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return true if the input is a valid (partial) match of the pattern.

-     * 

-     */

-    public boolean hasMatch(final Member pM1, final Member pM2) {

-      return rawHasMatch(new Object[]{pM1, pM2});

-    }

-    

-    /**

-     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return the number of pattern matches found.

-     * 

-     */

-    public int countMatches(final Member pM1, final Member pM2) {

-      return rawCountMatches(new Object[]{pM1, pM2});

-    }

-    

-    /**

-     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @param processor the action that will process the selected match.

-     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked

-     * 

-     */

-    public boolean forOneArbitraryMatch(final Member pM1, final Member pM2, final Consumer<? super TwoMembersHaveNoParent.Match> processor) {

-      return rawForOneArbitraryMatch(new Object[]{pM1, pM2}, processor);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.

-     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public TwoMembersHaveNoParent.Match newMatch(final Member pM1, final Member pM2) {

-      return TwoMembersHaveNoParent.Match.newMatch(pM1, pM2);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfm1(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_M1, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm1() {

-      return rawStreamAllValuesOfm1(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm1() {

-      return rawStreamAllValuesOfm1(emptyArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm1(final TwoMembersHaveNoParent.Match partialMatch) {

-      return rawStreamAllValuesOfm1(partialMatch.toArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm1(final Member pM2) {

-      return rawStreamAllValuesOfm1(new Object[]{null, pM2});

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm1(final TwoMembersHaveNoParent.Match partialMatch) {

-      return rawStreamAllValuesOfm1(partialMatch.toArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m1.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm1(final Member pM2) {

-      return rawStreamAllValuesOfm1(new Object[]{null, pM2}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfm2(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_M2, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm2() {

-      return rawStreamAllValuesOfm2(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm2() {

-      return rawStreamAllValuesOfm2(emptyArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm2(final TwoMembersHaveNoParent.Match partialMatch) {

-      return rawStreamAllValuesOfm2(partialMatch.toArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm2(final Member pM1) {

-      return rawStreamAllValuesOfm2(new Object[]{pM1, null});

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm2(final TwoMembersHaveNoParent.Match partialMatch) {

-      return rawStreamAllValuesOfm2(partialMatch.toArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m2.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm2(final Member pM1) {

-      return rawStreamAllValuesOfm2(new Object[]{pM1, null}).collect(Collectors.toSet());

-    }

-    

-    @Override

-    protected TwoMembersHaveNoParent.Match tupleToMatch(final Tuple t) {

-      try {

-          return TwoMembersHaveNoParent.Match.newMatch((Member) t.get(POSITION_M1), (Member) t.get(POSITION_M2));

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in tuple not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected TwoMembersHaveNoParent.Match arrayToMatch(final Object[] match) {

-      try {

-          return TwoMembersHaveNoParent.Match.newMatch((Member) match[POSITION_M1], (Member) match[POSITION_M2]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected TwoMembersHaveNoParent.Match arrayToMatchMutable(final Object[] match) {

-      try {

-          return TwoMembersHaveNoParent.Match.newMutableMatch((Member) match[POSITION_M1], (Member) match[POSITION_M2]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    /**

-     * @return the singleton instance of the query specification of this pattern

-     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-     * 

-     */

-    public static IQuerySpecification<TwoMembersHaveNoParent.Matcher> querySpecification() {

-      return TwoMembersHaveNoParent.instance();

-    }

-  }

-  

-  private TwoMembersHaveNoParent() {

-    super(GeneratedPQuery.INSTANCE);

-  }

-  

-  /**

-   * @return the singleton instance of the query specification

-   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-   * 

-   */

-  public static TwoMembersHaveNoParent instance() {

-    try{

-        return LazyHolder.INSTANCE;

-    } catch (ExceptionInInitializerError err) {

-        throw processInitializerError(err);

-    }

-  }

-  

-  @Override

-  protected TwoMembersHaveNoParent.Matcher instantiate(final ViatraQueryEngine engine) {

-    return TwoMembersHaveNoParent.Matcher.on(engine);

-  }

-  

-  @Override

-  public TwoMembersHaveNoParent.Matcher instantiate() {

-    return TwoMembersHaveNoParent.Matcher.create();

-  }

-  

-  @Override

-  public TwoMembersHaveNoParent.Match newEmptyMatch() {

-    return TwoMembersHaveNoParent.Match.newEmptyMatch();

-  }

-  

-  @Override

-  public TwoMembersHaveNoParent.Match newMatch(final Object... parameters) {

-    return TwoMembersHaveNoParent.Match.newMatch((familytree.Member) parameters[0], (familytree.Member) parameters[1]);

-  }

-  

-  /**

-   * Inner class allowing the singleton instance of {@link TwoMembersHaveNoParent} to be created 

-   *     <b>not</b> at the class load time of the outer class, 

-   *     but rather at the first call to {@link TwoMembersHaveNoParent#instance()}.

-   * 

-   * <p> This workaround is required e.g. to support recursion.

-   * 

-   */

-  private static class LazyHolder {

-    private static final TwoMembersHaveNoParent INSTANCE = new TwoMembersHaveNoParent();

-    

-    /**

-     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.

-     * This initialization order is required to support indirect recursion.

-     * 

-     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.

-     * 

-     */

-    private static final Object STATIC_INITIALIZER = ensureInitialized();

-    

-    public static Object ensureInitialized() {

-      INSTANCE.ensureInitializedInternal();

-      return null;

-    }

-  }

-  

-  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {

-    private static final TwoMembersHaveNoParent.GeneratedPQuery INSTANCE = new GeneratedPQuery();

-    

-    private final PParameter parameter_m1 = new PParameter("m1", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final PParameter parameter_m2 = new PParameter("m2", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final List<PParameter> parameters = Arrays.asList(parameter_m1, parameter_m2);

-    

-    private GeneratedPQuery() {

-      super(PVisibility.PUBLIC);

-    }

-    

-    @Override

-    public String getFullyQualifiedName() {

-      return "queries.twoMembersHaveNoParent";

-    }

-    

-    @Override

-    public List<String> getParameterNames() {

-      return Arrays.asList("m1","m2");

-    }

-    

-    @Override

-    public List<PParameter> getParameters() {

-      return parameters;

-    }

-    

-    @Override

-    public Set<PBody> doGetContainedBodies() {

-      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));

-      Set<PBody> bodies = new LinkedHashSet<>();

-      {

-          PBody body = new PBody(this);

-          PVariable var_m1 = body.getOrCreateVariableByName("m1");

-          PVariable var_m2 = body.getOrCreateVariableByName("m2");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(

-             new ExportedParameter(body, var_m1, parameter_m1),

-             new ExportedParameter(body, var_m2, parameter_m2)

-          ));

-          //    neg find memberHasParent(m1)

-          new NegativePatternCall(body, Tuples.flatTupleOf(var_m1), MemberHasParent.instance().getInternalQueryRepresentation());

-          //    neg find memberHasParent(m2)

-          new NegativePatternCall(body, Tuples.flatTupleOf(var_m2), MemberHasParent.instance().getInternalQueryRepresentation());

-          //    m1 != m2

-          new Inequality(body, var_m1, var_m2);

-          bodies.add(body);

-      }

-      {

-          PAnnotation annotation = new PAnnotation("Constraint");

-          annotation.addAttribute("message", "twoMembersHaveNoParent");

-          annotation.addAttribute("severity", "error");

-          annotation.addAttribute("key", Arrays.asList(new Object[] {

-                              new ParameterReference("m1"), 

-                              new ParameterReference("m2")

-                              }));

-          addAnnotation(annotation);

-      }

-      return bodies;

-    }

-  }

-}

+/**
+ * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql
+ */
+package queries;
+
+import familytree.Member;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+import queries.MemberHasParent;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message="twoMembersHaveNoParent", severity="error", key={m1, m2})
+ *         pattern twoMembersHaveNoParent(m1:Member, m2:Member) = {
+ *              neg find memberHasParent(m1);
+ *              neg find memberHasParent(m2);
+ *              m1 != m2;
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TwoMembersHaveNoParent extends BaseGeneratedEMFQuerySpecification<TwoMembersHaveNoParent.Matcher> {
+  /**
+   * Pattern-specific match representation of the queries.twoMembersHaveNoParent pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Member fM1;
+    
+    private Member fM2;
+    
+    private static List<String> parameterNames = makeImmutableList("m1", "m2");
+    
+    private Match(final Member pM1, final Member pM2) {
+      this.fM1 = pM1;
+      this.fM2 = pM2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "m1": return this.fM1;
+          case "m2": return this.fM2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fM1;
+          case 1: return this.fM2;
+          default: return null;
+      }
+    }
+    
+    public Member getM1() {
+      return this.fM1;
+    }
+    
+    public Member getM2() {
+      return this.fM2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("m1".equals(parameterName) ) {
+          this.fM1 = (Member) newValue;
+          return true;
+      }
+      if ("m2".equals(parameterName) ) {
+          this.fM2 = (Member) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setM1(final Member pM1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fM1 = pM1;
+    }
+    
+    public void setM2(final Member pM2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fM2 = pM2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "queries.twoMembersHaveNoParent";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TwoMembersHaveNoParent.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fM1, fM2};
+    }
+    
+    @Override
+    public TwoMembersHaveNoParent.Match toImmutable() {
+      return isMutable() ? newMatch(fM1, fM2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"m1\"=" + prettyPrintValue(fM1) + ", ");
+      result.append("\"m2\"=" + prettyPrintValue(fM2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fM1, fM2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TwoMembersHaveNoParent.Match)) {
+          TwoMembersHaveNoParent.Match other = (TwoMembersHaveNoParent.Match) obj;
+          return Objects.equals(fM1, other.fM1) && Objects.equals(fM2, other.fM2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TwoMembersHaveNoParent specification() {
+      return TwoMembersHaveNoParent.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TwoMembersHaveNoParent.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TwoMembersHaveNoParent.Match newMutableMatch(final Member pM1, final Member pM2) {
+      return new Mutable(pM1, pM2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TwoMembersHaveNoParent.Match newMatch(final Member pM1, final Member pM2) {
+      return new Immutable(pM1, pM2);
+    }
+    
+    private static final class Mutable extends TwoMembersHaveNoParent.Match {
+      Mutable(final Member pM1, final Member pM2) {
+        super(pM1, pM2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TwoMembersHaveNoParent.Match {
+      Immutable(final Member pM1, final Member pM2) {
+        super(pM1, pM2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the queries.twoMembersHaveNoParent pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message="twoMembersHaveNoParent", severity="error", key={m1, m2})
+   * pattern twoMembersHaveNoParent(m1:Member, m2:Member) = {
+   *    neg find memberHasParent(m1);
+   *    neg find memberHasParent(m2);
+   *    m1 != m2;
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TwoMembersHaveNoParent
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TwoMembersHaveNoParent.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TwoMembersHaveNoParent.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TwoMembersHaveNoParent.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_M1 = 0;
+    
+    private static final int POSITION_M2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TwoMembersHaveNoParent.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TwoMembersHaveNoParent.Match> getAllMatches(final Member pM1, final Member pM2) {
+      return rawStreamAllMatches(new Object[]{pM1, pM2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TwoMembersHaveNoParent.Match> streamAllMatches(final Member pM1, final Member pM2) {
+      return rawStreamAllMatches(new Object[]{pM1, pM2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TwoMembersHaveNoParent.Match> getOneArbitraryMatch(final Member pM1, final Member pM2) {
+      return rawGetOneArbitraryMatch(new Object[]{pM1, pM2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Member pM1, final Member pM2) {
+      return rawHasMatch(new Object[]{pM1, pM2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Member pM1, final Member pM2) {
+      return rawCountMatches(new Object[]{pM1, pM2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Member pM1, final Member pM2, final Consumer<? super TwoMembersHaveNoParent.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pM1, pM2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM1 the fixed value of pattern parameter m1, or null if not bound.
+     * @param pM2 the fixed value of pattern parameter m2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TwoMembersHaveNoParent.Match newMatch(final Member pM1, final Member pM2) {
+      return TwoMembersHaveNoParent.Match.newMatch(pM1, pM2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfm1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_M1, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm1() {
+      return rawStreamAllValuesOfm1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm1() {
+      return rawStreamAllValuesOfm1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm1(final TwoMembersHaveNoParent.Match partialMatch) {
+      return rawStreamAllValuesOfm1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm1(final Member pM2) {
+      return rawStreamAllValuesOfm1(new Object[]{null, pM2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm1(final TwoMembersHaveNoParent.Match partialMatch) {
+      return rawStreamAllValuesOfm1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm1(final Member pM2) {
+      return rawStreamAllValuesOfm1(new Object[]{null, pM2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfm2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_M2, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm2() {
+      return rawStreamAllValuesOfm2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm2() {
+      return rawStreamAllValuesOfm2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm2(final TwoMembersHaveNoParent.Match partialMatch) {
+      return rawStreamAllValuesOfm2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm2(final Member pM1) {
+      return rawStreamAllValuesOfm2(new Object[]{pM1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm2(final TwoMembersHaveNoParent.Match partialMatch) {
+      return rawStreamAllValuesOfm2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm2(final Member pM1) {
+      return rawStreamAllValuesOfm2(new Object[]{pM1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected TwoMembersHaveNoParent.Match tupleToMatch(final Tuple t) {
+      try {
+          return TwoMembersHaveNoParent.Match.newMatch((Member) t.get(POSITION_M1), (Member) t.get(POSITION_M2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TwoMembersHaveNoParent.Match arrayToMatch(final Object[] match) {
+      try {
+          return TwoMembersHaveNoParent.Match.newMatch((Member) match[POSITION_M1], (Member) match[POSITION_M2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TwoMembersHaveNoParent.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TwoMembersHaveNoParent.Match.newMutableMatch((Member) match[POSITION_M1], (Member) match[POSITION_M2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TwoMembersHaveNoParent.Matcher> querySpecification() {
+      return TwoMembersHaveNoParent.instance();
+    }
+  }
+  
+  private TwoMembersHaveNoParent() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TwoMembersHaveNoParent instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TwoMembersHaveNoParent.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TwoMembersHaveNoParent.Matcher.on(engine);
+  }
+  
+  @Override
+  public TwoMembersHaveNoParent.Matcher instantiate() {
+    return TwoMembersHaveNoParent.Matcher.create();
+  }
+  
+  @Override
+  public TwoMembersHaveNoParent.Match newEmptyMatch() {
+    return TwoMembersHaveNoParent.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TwoMembersHaveNoParent.Match newMatch(final Object... parameters) {
+    return TwoMembersHaveNoParent.Match.newMatch((familytree.Member) parameters[0], (familytree.Member) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TwoMembersHaveNoParent} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TwoMembersHaveNoParent#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TwoMembersHaveNoParent INSTANCE = new TwoMembersHaveNoParent();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TwoMembersHaveNoParent.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_m1 = new PParameter("m1", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_m2 = new PParameter("m2", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_m1, parameter_m2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "queries.twoMembersHaveNoParent";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("m1","m2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_m1 = body.getOrCreateVariableByName("m1");
+          PVariable var_m2 = body.getOrCreateVariableByName("m2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_m1, parameter_m1),
+             new ExportedParameter(body, var_m2, parameter_m2)
+          ));
+          //    neg find memberHasParent(m1)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_m1), MemberHasParent.instance().getInternalQueryRepresentation());
+          //    neg find memberHasParent(m2)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_m2), MemberHasParent.instance().getInternalQueryRepresentation());
+          //    m1 != m2
+          new Inequality(body, var_m1, var_m2);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "twoMembersHaveNoParent");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("m1"), 
+                              new ParameterReference("m2")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Tests/MODELS2020-CaseStudies/case.study.pledge.run/plugin.xml b/Tests/MODELS2020-CaseStudies/case.study.pledge.run/plugin.xml
index 63aa0b02..8b036ff2 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.pledge.run/plugin.xml
+++ b/Tests/MODELS2020-CaseStudies/case.study.pledge.run/plugin.xml
@@ -1,42 +1,42 @@
-<?xml version="1.0" encoding="UTF-8"?><plugin>

-  <extension id="queries.Case_study_A" point="org.eclipse.viatra.query.runtime.queryspecification">

-    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:queries.Case_study_A" id="queries.Case_study_A">

-      <query-specification fqn="queries.inv03"/>

-      <query-specification fqn="queries.x_inv03_eligAll"/>

-      <query-specification fqn="queries.x_inv03_hasAll"/>

-      <query-specification fqn="queries.inv05"/>

-      <query-specification fqn="queries.x_inv05_inRange"/>

-      <query-specification fqn="queries.inv06"/>

-      <query-specification fqn="queries.inv07"/>

-      <query-specification fqn="queries.inv08"/>

-      <query-specification fqn="queries.x_inv08_notEI"/>

-      <query-specification fqn="queries.x_inv08_noType"/>

-      <query-specification fqn="queries.x_inv08_inRange"/>

-      <query-specification fqn="queries.inv10"/>

-      <query-specification fqn="queries.inv11"/>

-      <query-specification fqn="queries.x_inv11_incOver100"/>

-      <query-specification fqn="queries.x_inv11_incNotOver100"/>

-      <query-specification fqn="queries.inv12"/>

-      <query-specification fqn="queries.x_inv12_notNonRes"/>

-      <query-specification fqn="queries.x_inv12_notZZ"/>

-      <query-specification fqn="queries.inv13"/>

-      <query-specification fqn="queries.x_inv13"/>

-      <query-specification fqn="queries.inv15"/>

-      <query-specification fqn="queries.x_inv15"/>

-      <query-specification fqn="queries.inv17"/>

-      <query-specification fqn="queries.inv20"/>

-      <query-specification fqn="queries.inv33"/>

-      <query-specification fqn="queries.inv34"/>

-      <query-specification fqn="queries.inv35"/>

-      <query-specification fqn="queries.inv47"/>

-      <query-specification fqn="queries.x_inv47"/>

-      <query-specification fqn="queries.inv48"/>

-      <query-specification fqn="queries.x_inv48_notDis"/>

-      <query-specification fqn="queries.x_inv48_Dis"/>

-      <query-specification fqn="queries.x_inv48_3"/>

-      <query-specification fqn="queries.inv49"/>

-      <query-specification fqn="queries.x_inv49_1"/>

-      <query-specification fqn="queries.x_inv49_2"/>

-    </group>

-  </extension>

-</plugin>

+<?xml version="1.0" encoding="UTF-8"?><plugin>
+  <extension id="queries.Case_study_A" point="org.eclipse.viatra.query.runtime.queryspecification">
+    <group group="org.eclipse.viatra.query.runtime.extensibility.SingletonExtensionFactory:queries.Case_study_A" id="queries.Case_study_A">
+      <query-specification fqn="queries.inv03"/>
+      <query-specification fqn="queries.x_inv03_eligAll"/>
+      <query-specification fqn="queries.x_inv03_hasAll"/>
+      <query-specification fqn="queries.inv05"/>
+      <query-specification fqn="queries.x_inv05_inRange"/>
+      <query-specification fqn="queries.inv06"/>
+      <query-specification fqn="queries.inv07"/>
+      <query-specification fqn="queries.inv08"/>
+      <query-specification fqn="queries.x_inv08_notEI"/>
+      <query-specification fqn="queries.x_inv08_noType"/>
+      <query-specification fqn="queries.x_inv08_inRange"/>
+      <query-specification fqn="queries.inv10"/>
+      <query-specification fqn="queries.inv11"/>
+      <query-specification fqn="queries.x_inv11_incOver100"/>
+      <query-specification fqn="queries.x_inv11_incNotOver100"/>
+      <query-specification fqn="queries.inv12"/>
+      <query-specification fqn="queries.x_inv12_notNonRes"/>
+      <query-specification fqn="queries.x_inv12_notZZ"/>
+      <query-specification fqn="queries.inv13"/>
+      <query-specification fqn="queries.x_inv13"/>
+      <query-specification fqn="queries.inv15"/>
+      <query-specification fqn="queries.x_inv15"/>
+      <query-specification fqn="queries.inv17"/>
+      <query-specification fqn="queries.inv20"/>
+      <query-specification fqn="queries.inv33"/>
+      <query-specification fqn="queries.inv34"/>
+      <query-specification fqn="queries.inv35"/>
+      <query-specification fqn="queries.inv47"/>
+      <query-specification fqn="queries.x_inv47"/>
+      <query-specification fqn="queries.inv48"/>
+      <query-specification fqn="queries.x_inv48_notDis"/>
+      <query-specification fqn="queries.x_inv48_Dis"/>
+      <query-specification fqn="queries.x_inv48_3"/>
+      <query-specification fqn="queries.inv49"/>
+      <query-specification fqn="queries.x_inv49_1"/>
+      <query-specification fqn="queries.x_inv49_2"/>
+    </group>
+  </extension>
+</plugin>
diff --git a/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/.GeneratePledgeModels.xtendbin b/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/.GeneratePledgeModels.xtendbin
index 3430ce88..163f84a1 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/.GeneratePledgeModels.xtendbin
+++ b/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/.GeneratePledgeModels.xtendbin
diff --git a/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/GeneratePledgeModels.java b/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/GeneratePledgeModels.java
index 35ddb32f..2809679d 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/GeneratePledgeModels.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.pledge.run/xtend-gen/run/GeneratePledgeModels.java
@@ -1,314 +1,314 @@
-package run;

-

-import Taxation.TaxationPackage;

-import com.google.common.base.Objects;

-import com.google.common.collect.Iterables;

-import com.google.inject.Injector;

-import hu.bme.mit.inf.dslreasoner.ecore2logic.Ecore2Logic;

-import hu.bme.mit.inf.dslreasoner.ecore2logic.Ecore2LogicConfiguration;

-import hu.bme.mit.inf.dslreasoner.ecore2logic.Ecore2Logic_Trace;

-import hu.bme.mit.inf.dslreasoner.ecore2logic.EcoreMetamodelDescriptor;

-import hu.bme.mit.inf.dslreasoner.logic.model.builder.DocumentationLevel;

-import hu.bme.mit.inf.dslreasoner.logic.model.builder.LogicModelInterpretation;

-import hu.bme.mit.inf.dslreasoner.logic.model.builder.TracedOutput;

-import hu.bme.mit.inf.dslreasoner.logic.model.logiclanguage.Type;

-import hu.bme.mit.inf.dslreasoner.logic.model.logicproblem.LogicProblem;

-import hu.bme.mit.inf.dslreasoner.logic.model.logicresult.LogicResult;

-import hu.bme.mit.inf.dslreasoner.logic.model.logicresult.ModelResult;

-import hu.bme.mit.inf.dslreasoner.logic.model.logicresult.Statistics;

-import hu.bme.mit.inf.dslreasoner.logic2ecore.Logic2Ecore;

-import hu.bme.mit.inf.dslreasoner.viatra2logic.Viatra2Logic;

-import hu.bme.mit.inf.dslreasoner.viatra2logic.ViatraQuerySetDescriptor;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretation2logic.InstanceModel2Logic;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.PartialInterpretation;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.visualisation.PartialInterpretation2Gml;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.visualisation.PartialInterpretationVisualisation;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.DebugConfiguration;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasoner;

-import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasonerConfiguration;

-import hu.bme.mit.inf.dslreasoner.visualisation.pi2graphviz.GraphvizVisualiser;

-import hu.bme.mit.inf.dslreasoner.workspace.FileSystemWorkspace;

-import hu.bme.mit.inf.dslreasoner.workspace.ReasonerWorkspace;

-import java.math.BigDecimal;

-import java.text.SimpleDateFormat;

-import java.util.Collections;

-import java.util.Date;

-import java.util.HashMap;

-import java.util.List;

-import java.util.Map;

-import java.util.Set;

-import java.util.TreeSet;

-import org.eclipse.emf.common.util.EList;

-import org.eclipse.emf.ecore.EAttribute;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.emf.ecore.EEnum;

-import org.eclipse.emf.ecore.EEnumLiteral;

-import org.eclipse.emf.ecore.EObject;

-import org.eclipse.emf.ecore.EPackage;

-import org.eclipse.emf.ecore.EReference;

-import org.eclipse.emf.ecore.EStructuralFeature;

-import org.eclipse.emf.ecore.resource.Resource;

-import org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl;

-import org.eclipse.viatra.query.patternlanguage.emf.EMFPatternLanguageStandaloneSetup;

-import org.eclipse.viatra.query.runtime.api.IQueryGroup;

-import org.eclipse.viatra.query.runtime.api.IQuerySpecification;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;

-import org.eclipse.viatra.query.runtime.rete.matcher.ReteEngine;

-import org.eclipse.xtend2.lib.StringConcatenation;

-import org.eclipse.xtext.xbase.lib.CollectionExtensions;

-import org.eclipse.xtext.xbase.lib.CollectionLiterals;

-import org.eclipse.xtext.xbase.lib.Exceptions;

-import org.eclipse.xtext.xbase.lib.ExclusiveRange;

-import org.eclipse.xtext.xbase.lib.Functions.Function1;

-import org.eclipse.xtext.xbase.lib.InputOutput;

-import org.eclipse.xtext.xbase.lib.IterableExtensions;

-import org.eclipse.xtext.xbase.lib.ListExtensions;

-import org.eclipse.xtext.xbase.lib.ObjectExtensions;

-import org.eclipse.xtext.xbase.lib.Procedures.Procedure1;

-

-@SuppressWarnings("all")

-public class GeneratePledgeModels {

-  public static void main(final String[] args) {

-    try {

-      final Injector x = new EMFPatternLanguageStandaloneSetup().createInjectorAndDoEMFRegistration();

-      Map<String, Object> _extensionToFactoryMap = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();

-      XMIResourceFactoryImpl _xMIResourceFactoryImpl = new XMIResourceFactoryImpl();

-      _extensionToFactoryMap.put("xmi", _xMIResourceFactoryImpl);

-      Map<String, Object> _extensionToFactoryMap_1 = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();

-      XMIResourceFactoryImpl _xMIResourceFactoryImpl_1 = new XMIResourceFactoryImpl();

-      _extensionToFactoryMap_1.put("logicproblem", _xMIResourceFactoryImpl_1);

-      Map<String, Object> _extensionToFactoryMap_2 = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();

-      XMIResourceFactoryImpl _xMIResourceFactoryImpl_2 = new XMIResourceFactoryImpl();

-      _extensionToFactoryMap_2.put("partialmodel", _xMIResourceFactoryImpl_2);

-      ReteEngine.class.getClass();

-      final Ecore2Logic ecore2Logic = new Ecore2Logic();

-      final Logic2Ecore logic2Ecore = new Logic2Ecore(ecore2Logic);

-      final Viatra2Logic viatra2Logic = new Viatra2Logic(ecore2Logic);

-      final InstanceModel2Logic instanceModel2Logic = new InstanceModel2Logic();

-      long _currentTimeMillis = System.currentTimeMillis();

-      final Date date = new Date(_currentTimeMillis);

-      final SimpleDateFormat format = new SimpleDateFormat("dd-HHmm");

-      final String formattedDate = format.format(date);

-      StringConcatenation _builder = new StringConcatenation();

-      _builder.append("inputs/");

-      final FileSystemWorkspace inputs = new FileSystemWorkspace(_builder.toString(), "");

-      StringConcatenation _builder_1 = new StringConcatenation();

-      _builder_1.append("output/");

-      String _plus = (_builder_1.toString() + formattedDate);

-      StringConcatenation _builder_2 = new StringConcatenation();

-      _builder_2.append("/");

-      String _plus_1 = (_plus + _builder_2);

-      final FileSystemWorkspace workspace = new FileSystemWorkspace(_plus_1, "");

-      StringConcatenation _builder_3 = new StringConcatenation();

-      _builder_3.append("output/");

-      String _plus_2 = (_builder_3.toString() + formattedDate);

-      StringConcatenation _builder_4 = new StringConcatenation();

-      _builder_4.append("/debug/");

-      String _plus_3 = (_plus_2 + _builder_4);

-      final FileSystemWorkspace debug = new FileSystemWorkspace(_plus_3, "");

-      workspace.initAndClear();

-      InputOutput.<String>println("Input and output workspaces are created");

-      final EcoreMetamodelDescriptor metamodel = GeneratePledgeModels.loadMetamodel(TaxationPackage.eINSTANCE);

-      final EList<EObject> partialModel = GeneratePledgeModels.loadPartialModel(inputs, "Household.xmi");

-      InputOutput.<String>println("DSL loaded");

-      final int SIZE = 2;

-      int REPS = 1;

-      final int RUNTIME = 600;

-      Ecore2LogicConfiguration _ecore2LogicConfiguration = new Ecore2LogicConfiguration();

-      final TracedOutput<LogicProblem, Ecore2Logic_Trace> modelGenerationProblem = ecore2Logic.transformMetamodel(metamodel, _ecore2LogicConfiguration);

-      LogicProblem problem = modelGenerationProblem.getOutput();

-      debug.writeModel(problem, "problem.logicproblem");

-      InputOutput.<String>println("Problem created");

-      for (int i = 0; (i < REPS); i++) {

-        {

-          ViatraReasoner reasoner = new ViatraReasoner();

-          final TreeSet<Integer> knownIntegers = new TreeSet<Integer>();

-          CollectionExtensions.<Integer>addAll(knownIntegers, Integer.valueOf(0));

-          final TreeSet<BigDecimal> knownReals = new TreeSet<BigDecimal>();

-          BigDecimal _bigDecimal = new BigDecimal("0.0");

-          CollectionExtensions.<BigDecimal>addAll(knownReals, _bigDecimal);

-          final TreeSet<String> knownStrings = new TreeSet<String>();

-          CollectionExtensions.<String>addAll(knownStrings, "r0", "r1", "r2");

-          ViatraReasonerConfiguration _viatraReasonerConfiguration = new ViatraReasonerConfiguration();

-          final Procedure1<ViatraReasonerConfiguration> _function = (ViatraReasonerConfiguration it) -> {

-            it.documentationLevel = DocumentationLevel.FULL;

-            DebugConfiguration _debugConfiguration = new DebugConfiguration();

-            final Procedure1<DebugConfiguration> _function_1 = (DebugConfiguration it_1) -> {

-              it_1.logging = true;

-            };

-            DebugConfiguration _doubleArrow = ObjectExtensions.<DebugConfiguration>operator_doubleArrow(_debugConfiguration, _function_1);

-            it.debugCongiguration = _doubleArrow;

-            it.runtimeLimit = RUNTIME;

-            boolean _isEmpty = knownIntegers.isEmpty();

-            boolean _not = (!_isEmpty);

-            if (_not) {

-              it.typeScopes.knownIntegers = knownIntegers;

-            }

-            boolean _isEmpty_1 = knownReals.isEmpty();

-            boolean _not_1 = (!_isEmpty_1);

-            if (_not_1) {

-              it.typeScopes.knownReals = knownReals;

-            }

-          };

-          final ViatraReasonerConfiguration solverConfig = ObjectExtensions.<ViatraReasonerConfiguration>operator_doubleArrow(_viatraReasonerConfiguration, _function);

-          InputOutput.<String>println((("Run #" + Integer.valueOf(i)) + ":"));

-          final long startTime = System.currentTimeMillis();

-          LogicResult solution = reasoner.solve(problem, solverConfig, debug);

-          long _currentTimeMillis_1 = System.currentTimeMillis();

-          final long totalTime = (_currentTimeMillis_1 - startTime);

-          InputOutput.<String>println("  Problem Solved");

-          GeneratePledgeModels.writeStats(solution, totalTime, solverConfig);

-          if ((solution instanceof ModelResult)) {

-            GeneratePledgeModels.writeRepresentation(solution, workspace, i);

-            GeneratePledgeModels.writeInterpretation(solution, logic2Ecore, workspace, i, reasoner, modelGenerationProblem);

-            InputOutput.<String>println("  Solution saved and visualised");

-          } else {

-            String _string = solution.getClass().getSimpleName().toString();

-            String _plus_4 = ("  Returned: " + _string);

-            InputOutput.<String>println(_plus_4);

-          }

-          final Runtime r = Runtime.getRuntime();

-          r.gc();

-          r.gc();

-          r.gc();

-          Thread.sleep(3000);

-        }

-      }

-      InputOutput.<String>println("---End---");

-    } catch (Throwable _e) {

-      throw Exceptions.sneakyThrow(_e);

-    }

-  }

-  

-  public static Map<Type, Integer> getTypeMap(final Map<Class, Integer> classMap, final EcoreMetamodelDescriptor metamodel, final Ecore2Logic e2l, final Ecore2Logic_Trace trace) {

-    final HashMap<Type, Integer> typeMap = new HashMap<Type, Integer>();

-    final Function1<EClass, String> _function = (EClass s) -> {

-      return s.getName();

-    };

-    final Map<String, EClass> listMap = IterableExtensions.<String, EClass>toMap(metamodel.getClasses(), _function);

-    Set<Class> _keySet = classMap.keySet();

-    for (final Class elem : _keySet) {

-      typeMap.put(

-        e2l.TypeofEClass(trace, 

-          listMap.get(elem.getSimpleName())), classMap.get(elem));

-    }

-    return typeMap;

-  }

-  

-  public static EcoreMetamodelDescriptor loadMetamodel(final EPackage pckg) {

-    final List<EClass> classes = IterableExtensions.<EClass>toList(Iterables.<EClass>filter(pckg.getEClassifiers(), EClass.class));

-    final List<EEnum> enums = IterableExtensions.<EEnum>toList(Iterables.<EEnum>filter(pckg.getEClassifiers(), EEnum.class));

-    final Function1<EEnum, EList<EEnumLiteral>> _function = (EEnum it) -> {

-      return it.getELiterals();

-    };

-    final List<EEnumLiteral> literals = IterableExtensions.<EEnumLiteral>toList(Iterables.<EEnumLiteral>concat(ListExtensions.<EEnum, EList<EEnumLiteral>>map(enums, _function)));

-    final Function1<EClass, EList<EReference>> _function_1 = (EClass it) -> {

-      return it.getEReferences();

-    };

-    final List<EReference> references = IterableExtensions.<EReference>toList(Iterables.<EReference>concat(ListExtensions.<EClass, EList<EReference>>map(classes, _function_1)));

-    final Function1<EClass, EList<EAttribute>> _function_2 = (EClass it) -> {

-      return it.getEAttributes();

-    };

-    final List<EAttribute> attributes = IterableExtensions.<EAttribute>toList(Iterables.<EAttribute>concat(ListExtensions.<EClass, EList<EAttribute>>map(classes, _function_2)));

-    return new EcoreMetamodelDescriptor(classes, Collections.<EClass>unmodifiableSet(CollectionLiterals.<EClass>newHashSet()), false, enums, literals, references, attributes);

-  }

-  

-  public static EList<EObject> loadPartialModel(final ReasonerWorkspace inputs, final String path) {

-    EList<EObject> _xblockexpression = null;

-    {

-      Map<String, Object> _extensionToFactoryMap = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();

-      XMIResourceFactoryImpl _xMIResourceFactoryImpl = new XMIResourceFactoryImpl();

-      _extensionToFactoryMap.put("*", _xMIResourceFactoryImpl);

-      _xblockexpression = inputs.<EObject>readModel(EObject.class, path).eResource().getContents();

-    }

-    return _xblockexpression;

-  }

-  

-  public static ViatraQuerySetDescriptor loadQueries(final EcoreMetamodelDescriptor metamodel, final IQueryGroup i) {

-    final List<IQuerySpecification<?>> patterns = IterableExtensions.<IQuerySpecification<?>>toList(i.getSpecifications());

-    final Function1<IQuerySpecification<?>, Boolean> _function = (IQuerySpecification<?> it) -> {

-      final Function1<PAnnotation, Boolean> _function_1 = (PAnnotation it_1) -> {

-        String _name = it_1.getName();

-        return Boolean.valueOf(Objects.equal(_name, "Constraint"));

-      };

-      return Boolean.valueOf(IterableExtensions.<PAnnotation>exists(it.getAllAnnotations(), _function_1));

-    };

-    final Set<IQuerySpecification<?>> wfPatterns = IterableExtensions.<IQuerySpecification<?>>toSet(IterableExtensions.<IQuerySpecification<?>>filter(patterns, _function));

-    final Map<IQuerySpecification<?>, EStructuralFeature> derivedFeatures = CollectionLiterals.<IQuerySpecification<?>, EStructuralFeature>emptyMap();

-    final ViatraQuerySetDescriptor res = new ViatraQuerySetDescriptor(patterns, wfPatterns, derivedFeatures);

-    return res;

-  }

-  

-  public static void writeInterpretation(final LogicResult solution, final Logic2Ecore logic2Ecore, final ReasonerWorkspace workspace, final int i, final ViatraReasoner reasoner, final TracedOutput<LogicProblem, Ecore2Logic_Trace> mgProb) {

-    final List<? extends LogicModelInterpretation> interpretations = reasoner.getInterpretations(((ModelResult) solution));

-    int _size = interpretations.size();

-    ExclusiveRange _doubleDotLessThan = new ExclusiveRange(0, _size, true);

-    for (final Integer interpIndex : _doubleDotLessThan) {

-      {

-        final LogicModelInterpretation interpretation = interpretations.get((interpIndex).intValue());

-        final EObject model = logic2Ecore.transformInterpretation(interpretation, mgProb.getTrace());

-        StringConcatenation _builder = new StringConcatenation();

-        _builder.append("solution");

-        _builder.append(i);

-        _builder.append("_");

-        _builder.append(interpIndex);

-        _builder.append(".xmi");

-        workspace.writeModel(model, _builder.toString());

-      }

-    }

-  }

-  

-  public static void writeRepresentation(final LogicResult solution, final ReasonerWorkspace workspace, final int i) {

-    final EList<Object> representations = solution.getRepresentation();

-    int _size = representations.size();

-    ExclusiveRange _doubleDotLessThan = new ExclusiveRange(0, _size, true);

-    for (final Integer representationIndex : _doubleDotLessThan) {

-      {

-        final Object representation = representations.get((representationIndex).intValue());

-        if ((representation instanceof PartialInterpretation)) {

-          final String gml = new PartialInterpretation2Gml().transform(((PartialInterpretation)representation));

-          StringConcatenation _builder = new StringConcatenation();

-          _builder.append("solution");

-          _builder.append(i);

-          _builder.append("_");

-          _builder.append(representationIndex);

-          _builder.append(".gml");

-          workspace.writeText(_builder.toString(), gml);

-          final PartialInterpretationVisualisation png = new GraphvizVisualiser().visualiseConcretization(((PartialInterpretation)representation));

-          StringConcatenation _builder_1 = new StringConcatenation();

-          _builder_1.append("solution");

-          _builder_1.append(i);

-          _builder_1.append("_");

-          _builder_1.append(representationIndex);

-          _builder_1.append(".png");

-          png.writeToFile(workspace, _builder_1.toString());

-        } else {

-          StringConcatenation _builder_2 = new StringConcatenation();

-          _builder_2.append("solution");

-          _builder_2.append(representationIndex);

-          _builder_2.append(".txt");

-          workspace.writeText(_builder_2.toString(), representation.toString());

-        }

-      }

-    }

-  }

-  

-  public static String writeStats(final LogicResult solution, final long time, final ViatraReasonerConfiguration config) {

-    String _xblockexpression = null;

-    {

-      final Statistics stats = solution.getStatistics();

-      InputOutput.<String>println("  Statistics:");

-      Object _xifexpression = null;

-      if ((config.typeScopes.maxNewElements == 2147483647)) {

-        _xifexpression = "*";

-      } else {

-        _xifexpression = Integer.valueOf(config.typeScopes.maxNewElements);

-      }

-      String _plus = ((("    #new nodes    : [" + Integer.valueOf(config.typeScopes.minNewElements)) + "..") + _xifexpression);

-      String _plus_1 = (_plus + "]");

-      InputOutput.<String>println(_plus_1);

-      _xblockexpression = InputOutput.<String>println((("    \"solve\" time: " + Double.valueOf((((double) time) / 1000))) + " s"));

-    }

-    return _xblockexpression;

-  }

-}

+package run;
+
+import Taxation.TaxationPackage;
+import com.google.common.base.Objects;
+import com.google.common.collect.Iterables;
+import com.google.inject.Injector;
+import hu.bme.mit.inf.dslreasoner.ecore2logic.Ecore2Logic;
+import hu.bme.mit.inf.dslreasoner.ecore2logic.Ecore2LogicConfiguration;
+import hu.bme.mit.inf.dslreasoner.ecore2logic.Ecore2Logic_Trace;
+import hu.bme.mit.inf.dslreasoner.ecore2logic.EcoreMetamodelDescriptor;
+import hu.bme.mit.inf.dslreasoner.logic.model.builder.DocumentationLevel;
+import hu.bme.mit.inf.dslreasoner.logic.model.builder.LogicModelInterpretation;
+import hu.bme.mit.inf.dslreasoner.logic.model.builder.TracedOutput;
+import hu.bme.mit.inf.dslreasoner.logic.model.logiclanguage.Type;
+import hu.bme.mit.inf.dslreasoner.logic.model.logicproblem.LogicProblem;
+import hu.bme.mit.inf.dslreasoner.logic.model.logicresult.LogicResult;
+import hu.bme.mit.inf.dslreasoner.logic.model.logicresult.ModelResult;
+import hu.bme.mit.inf.dslreasoner.logic.model.logicresult.Statistics;
+import hu.bme.mit.inf.dslreasoner.logic2ecore.Logic2Ecore;
+import hu.bme.mit.inf.dslreasoner.viatra2logic.Viatra2Logic;
+import hu.bme.mit.inf.dslreasoner.viatra2logic.ViatraQuerySetDescriptor;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretation2logic.InstanceModel2Logic;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.PartialInterpretation;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.visualisation.PartialInterpretation2Gml;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.visualisation.PartialInterpretationVisualisation;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.DebugConfiguration;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasoner;
+import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasonerConfiguration;
+import hu.bme.mit.inf.dslreasoner.visualisation.pi2graphviz.GraphvizVisualiser;
+import hu.bme.mit.inf.dslreasoner.workspace.FileSystemWorkspace;
+import hu.bme.mit.inf.dslreasoner.workspace.ReasonerWorkspace;
+import java.math.BigDecimal;
+import java.text.SimpleDateFormat;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EAttribute;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EEnum;
+import org.eclipse.emf.ecore.EEnumLiteral;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EPackage;
+import org.eclipse.emf.ecore.EReference;
+import org.eclipse.emf.ecore.EStructuralFeature;
+import org.eclipse.emf.ecore.resource.Resource;
+import org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl;
+import org.eclipse.viatra.query.patternlanguage.emf.EMFPatternLanguageStandaloneSetup;
+import org.eclipse.viatra.query.runtime.api.IQueryGroup;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.rete.matcher.ReteEngine;
+import org.eclipse.xtend2.lib.StringConcatenation;
+import org.eclipse.xtext.xbase.lib.CollectionExtensions;
+import org.eclipse.xtext.xbase.lib.CollectionLiterals;
+import org.eclipse.xtext.xbase.lib.Exceptions;
+import org.eclipse.xtext.xbase.lib.ExclusiveRange;
+import org.eclipse.xtext.xbase.lib.Functions.Function1;
+import org.eclipse.xtext.xbase.lib.InputOutput;
+import org.eclipse.xtext.xbase.lib.IterableExtensions;
+import org.eclipse.xtext.xbase.lib.ListExtensions;
+import org.eclipse.xtext.xbase.lib.ObjectExtensions;
+import org.eclipse.xtext.xbase.lib.Procedures.Procedure1;
+
+@SuppressWarnings("all")
+public class GeneratePledgeModels {
+  public static void main(final String[] args) {
+    try {
+      final Injector x = new EMFPatternLanguageStandaloneSetup().createInjectorAndDoEMFRegistration();
+      Map<String, Object> _extensionToFactoryMap = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();
+      XMIResourceFactoryImpl _xMIResourceFactoryImpl = new XMIResourceFactoryImpl();
+      _extensionToFactoryMap.put("xmi", _xMIResourceFactoryImpl);
+      Map<String, Object> _extensionToFactoryMap_1 = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();
+      XMIResourceFactoryImpl _xMIResourceFactoryImpl_1 = new XMIResourceFactoryImpl();
+      _extensionToFactoryMap_1.put("logicproblem", _xMIResourceFactoryImpl_1);
+      Map<String, Object> _extensionToFactoryMap_2 = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();
+      XMIResourceFactoryImpl _xMIResourceFactoryImpl_2 = new XMIResourceFactoryImpl();
+      _extensionToFactoryMap_2.put("partialmodel", _xMIResourceFactoryImpl_2);
+      ReteEngine.class.getClass();
+      final Ecore2Logic ecore2Logic = new Ecore2Logic();
+      final Logic2Ecore logic2Ecore = new Logic2Ecore(ecore2Logic);
+      final Viatra2Logic viatra2Logic = new Viatra2Logic(ecore2Logic);
+      final InstanceModel2Logic instanceModel2Logic = new InstanceModel2Logic();
+      long _currentTimeMillis = System.currentTimeMillis();
+      final Date date = new Date(_currentTimeMillis);
+      final SimpleDateFormat format = new SimpleDateFormat("dd-HHmm");
+      final String formattedDate = format.format(date);
+      StringConcatenation _builder = new StringConcatenation();
+      _builder.append("inputs/");
+      final FileSystemWorkspace inputs = new FileSystemWorkspace(_builder.toString(), "");
+      StringConcatenation _builder_1 = new StringConcatenation();
+      _builder_1.append("output/");
+      String _plus = (_builder_1.toString() + formattedDate);
+      StringConcatenation _builder_2 = new StringConcatenation();
+      _builder_2.append("/");
+      String _plus_1 = (_plus + _builder_2);
+      final FileSystemWorkspace workspace = new FileSystemWorkspace(_plus_1, "");
+      StringConcatenation _builder_3 = new StringConcatenation();
+      _builder_3.append("output/");
+      String _plus_2 = (_builder_3.toString() + formattedDate);
+      StringConcatenation _builder_4 = new StringConcatenation();
+      _builder_4.append("/debug/");
+      String _plus_3 = (_plus_2 + _builder_4);
+      final FileSystemWorkspace debug = new FileSystemWorkspace(_plus_3, "");
+      workspace.initAndClear();
+      InputOutput.<String>println("Input and output workspaces are created");
+      final EcoreMetamodelDescriptor metamodel = GeneratePledgeModels.loadMetamodel(TaxationPackage.eINSTANCE);
+      final EList<EObject> partialModel = GeneratePledgeModels.loadPartialModel(inputs, "Household.xmi");
+      InputOutput.<String>println("DSL loaded");
+      final int SIZE = 2;
+      int REPS = 1;
+      final int RUNTIME = 600;
+      Ecore2LogicConfiguration _ecore2LogicConfiguration = new Ecore2LogicConfiguration();
+      final TracedOutput<LogicProblem, Ecore2Logic_Trace> modelGenerationProblem = ecore2Logic.transformMetamodel(metamodel, _ecore2LogicConfiguration);
+      LogicProblem problem = modelGenerationProblem.getOutput();
+      debug.writeModel(problem, "problem.logicproblem");
+      InputOutput.<String>println("Problem created");
+      for (int i = 0; (i < REPS); i++) {
+        {
+          ViatraReasoner reasoner = new ViatraReasoner();
+          final TreeSet<Integer> knownIntegers = new TreeSet<Integer>();
+          CollectionExtensions.<Integer>addAll(knownIntegers, Integer.valueOf(0));
+          final TreeSet<BigDecimal> knownReals = new TreeSet<BigDecimal>();
+          BigDecimal _bigDecimal = new BigDecimal("0.0");
+          CollectionExtensions.<BigDecimal>addAll(knownReals, _bigDecimal);
+          final TreeSet<String> knownStrings = new TreeSet<String>();
+          CollectionExtensions.<String>addAll(knownStrings, "r0", "r1", "r2");
+          ViatraReasonerConfiguration _viatraReasonerConfiguration = new ViatraReasonerConfiguration();
+          final Procedure1<ViatraReasonerConfiguration> _function = (ViatraReasonerConfiguration it) -> {
+            it.documentationLevel = DocumentationLevel.FULL;
+            DebugConfiguration _debugConfiguration = new DebugConfiguration();
+            final Procedure1<DebugConfiguration> _function_1 = (DebugConfiguration it_1) -> {
+              it_1.logging = true;
+            };
+            DebugConfiguration _doubleArrow = ObjectExtensions.<DebugConfiguration>operator_doubleArrow(_debugConfiguration, _function_1);
+            it.debugCongiguration = _doubleArrow;
+            it.runtimeLimit = RUNTIME;
+            boolean _isEmpty = knownIntegers.isEmpty();
+            boolean _not = (!_isEmpty);
+            if (_not) {
+              it.typeScopes.knownIntegers = knownIntegers;
+            }
+            boolean _isEmpty_1 = knownReals.isEmpty();
+            boolean _not_1 = (!_isEmpty_1);
+            if (_not_1) {
+              it.typeScopes.knownReals = knownReals;
+            }
+          };
+          final ViatraReasonerConfiguration solverConfig = ObjectExtensions.<ViatraReasonerConfiguration>operator_doubleArrow(_viatraReasonerConfiguration, _function);
+          InputOutput.<String>println((("Run #" + Integer.valueOf(i)) + ":"));
+          final long startTime = System.currentTimeMillis();
+          LogicResult solution = reasoner.solve(problem, solverConfig, debug);
+          long _currentTimeMillis_1 = System.currentTimeMillis();
+          final long totalTime = (_currentTimeMillis_1 - startTime);
+          InputOutput.<String>println("  Problem Solved");
+          GeneratePledgeModels.writeStats(solution, totalTime, solverConfig);
+          if ((solution instanceof ModelResult)) {
+            GeneratePledgeModels.writeRepresentation(solution, workspace, i);
+            GeneratePledgeModels.writeInterpretation(solution, logic2Ecore, workspace, i, reasoner, modelGenerationProblem);
+            InputOutput.<String>println("  Solution saved and visualised");
+          } else {
+            String _string = solution.getClass().getSimpleName().toString();
+            String _plus_4 = ("  Returned: " + _string);
+            InputOutput.<String>println(_plus_4);
+          }
+          final Runtime r = Runtime.getRuntime();
+          r.gc();
+          r.gc();
+          r.gc();
+          Thread.sleep(3000);
+        }
+      }
+      InputOutput.<String>println("---End---");
+    } catch (Throwable _e) {
+      throw Exceptions.sneakyThrow(_e);
+    }
+  }
+  
+  public static Map<Type, Integer> getTypeMap(final Map<Class, Integer> classMap, final EcoreMetamodelDescriptor metamodel, final Ecore2Logic e2l, final Ecore2Logic_Trace trace) {
+    final HashMap<Type, Integer> typeMap = new HashMap<Type, Integer>();
+    final Function1<EClass, String> _function = (EClass s) -> {
+      return s.getName();
+    };
+    final Map<String, EClass> listMap = IterableExtensions.<String, EClass>toMap(metamodel.getClasses(), _function);
+    Set<Class> _keySet = classMap.keySet();
+    for (final Class elem : _keySet) {
+      typeMap.put(
+        e2l.TypeofEClass(trace, 
+          listMap.get(elem.getSimpleName())), classMap.get(elem));
+    }
+    return typeMap;
+  }
+  
+  public static EcoreMetamodelDescriptor loadMetamodel(final EPackage pckg) {
+    final List<EClass> classes = IterableExtensions.<EClass>toList(Iterables.<EClass>filter(pckg.getEClassifiers(), EClass.class));
+    final List<EEnum> enums = IterableExtensions.<EEnum>toList(Iterables.<EEnum>filter(pckg.getEClassifiers(), EEnum.class));
+    final Function1<EEnum, EList<EEnumLiteral>> _function = (EEnum it) -> {
+      return it.getELiterals();
+    };
+    final List<EEnumLiteral> literals = IterableExtensions.<EEnumLiteral>toList(Iterables.<EEnumLiteral>concat(ListExtensions.<EEnum, EList<EEnumLiteral>>map(enums, _function)));
+    final Function1<EClass, EList<EReference>> _function_1 = (EClass it) -> {
+      return it.getEReferences();
+    };
+    final List<EReference> references = IterableExtensions.<EReference>toList(Iterables.<EReference>concat(ListExtensions.<EClass, EList<EReference>>map(classes, _function_1)));
+    final Function1<EClass, EList<EAttribute>> _function_2 = (EClass it) -> {
+      return it.getEAttributes();
+    };
+    final List<EAttribute> attributes = IterableExtensions.<EAttribute>toList(Iterables.<EAttribute>concat(ListExtensions.<EClass, EList<EAttribute>>map(classes, _function_2)));
+    return new EcoreMetamodelDescriptor(classes, Collections.<EClass>unmodifiableSet(CollectionLiterals.<EClass>newHashSet()), false, enums, literals, references, attributes);
+  }
+  
+  public static EList<EObject> loadPartialModel(final ReasonerWorkspace inputs, final String path) {
+    EList<EObject> _xblockexpression = null;
+    {
+      Map<String, Object> _extensionToFactoryMap = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap();
+      XMIResourceFactoryImpl _xMIResourceFactoryImpl = new XMIResourceFactoryImpl();
+      _extensionToFactoryMap.put("*", _xMIResourceFactoryImpl);
+      _xblockexpression = inputs.<EObject>readModel(EObject.class, path).eResource().getContents();
+    }
+    return _xblockexpression;
+  }
+  
+  public static ViatraQuerySetDescriptor loadQueries(final EcoreMetamodelDescriptor metamodel, final IQueryGroup i) {
+    final List<IQuerySpecification<?>> patterns = IterableExtensions.<IQuerySpecification<?>>toList(i.getSpecifications());
+    final Function1<IQuerySpecification<?>, Boolean> _function = (IQuerySpecification<?> it) -> {
+      final Function1<PAnnotation, Boolean> _function_1 = (PAnnotation it_1) -> {
+        String _name = it_1.getName();
+        return Boolean.valueOf(Objects.equal(_name, "Constraint"));
+      };
+      return Boolean.valueOf(IterableExtensions.<PAnnotation>exists(it.getAllAnnotations(), _function_1));
+    };
+    final Set<IQuerySpecification<?>> wfPatterns = IterableExtensions.<IQuerySpecification<?>>toSet(IterableExtensions.<IQuerySpecification<?>>filter(patterns, _function));
+    final Map<IQuerySpecification<?>, EStructuralFeature> derivedFeatures = CollectionLiterals.<IQuerySpecification<?>, EStructuralFeature>emptyMap();
+    final ViatraQuerySetDescriptor res = new ViatraQuerySetDescriptor(patterns, wfPatterns, derivedFeatures);
+    return res;
+  }
+  
+  public static void writeInterpretation(final LogicResult solution, final Logic2Ecore logic2Ecore, final ReasonerWorkspace workspace, final int i, final ViatraReasoner reasoner, final TracedOutput<LogicProblem, Ecore2Logic_Trace> mgProb) {
+    final List<? extends LogicModelInterpretation> interpretations = reasoner.getInterpretations(((ModelResult) solution));
+    int _size = interpretations.size();
+    ExclusiveRange _doubleDotLessThan = new ExclusiveRange(0, _size, true);
+    for (final Integer interpIndex : _doubleDotLessThan) {
+      {
+        final LogicModelInterpretation interpretation = interpretations.get((interpIndex).intValue());
+        final EObject model = logic2Ecore.transformInterpretation(interpretation, mgProb.getTrace());
+        StringConcatenation _builder = new StringConcatenation();
+        _builder.append("solution");
+        _builder.append(i);
+        _builder.append("_");
+        _builder.append(interpIndex);
+        _builder.append(".xmi");
+        workspace.writeModel(model, _builder.toString());
+      }
+    }
+  }
+  
+  public static void writeRepresentation(final LogicResult solution, final ReasonerWorkspace workspace, final int i) {
+    final EList<Object> representations = solution.getRepresentation();
+    int _size = representations.size();
+    ExclusiveRange _doubleDotLessThan = new ExclusiveRange(0, _size, true);
+    for (final Integer representationIndex : _doubleDotLessThan) {
+      {
+        final Object representation = representations.get((representationIndex).intValue());
+        if ((representation instanceof PartialInterpretation)) {
+          final String gml = new PartialInterpretation2Gml().transform(((PartialInterpretation)representation));
+          StringConcatenation _builder = new StringConcatenation();
+          _builder.append("solution");
+          _builder.append(i);
+          _builder.append("_");
+          _builder.append(representationIndex);
+          _builder.append(".gml");
+          workspace.writeText(_builder.toString(), gml);
+          final PartialInterpretationVisualisation png = new GraphvizVisualiser().visualiseConcretization(((PartialInterpretation)representation));
+          StringConcatenation _builder_1 = new StringConcatenation();
+          _builder_1.append("solution");
+          _builder_1.append(i);
+          _builder_1.append("_");
+          _builder_1.append(representationIndex);
+          _builder_1.append(".png");
+          png.writeToFile(workspace, _builder_1.toString());
+        } else {
+          StringConcatenation _builder_2 = new StringConcatenation();
+          _builder_2.append("solution");
+          _builder_2.append(representationIndex);
+          _builder_2.append(".txt");
+          workspace.writeText(_builder_2.toString(), representation.toString());
+        }
+      }
+    }
+  }
+  
+  public static String writeStats(final LogicResult solution, final long time, final ViatraReasonerConfiguration config) {
+    String _xblockexpression = null;
+    {
+      final Statistics stats = solution.getStatistics();
+      InputOutput.<String>println("  Statistics:");
+      Object _xifexpression = null;
+      if ((config.typeScopes.maxNewElements == 2147483647)) {
+        _xifexpression = "*";
+      } else {
+        _xifexpression = Integer.valueOf(config.typeScopes.maxNewElements);
+      }
+      String _plus = ((("    #new nodes    : [" + Integer.valueOf(config.typeScopes.minNewElements)) + "..") + _xifexpression);
+      String _plus_1 = (_plus + "]");
+      InputOutput.<String>println(_plus_1);
+      _xblockexpression = InputOutput.<String>println((("    \"solve\" time: " + Double.valueOf((((double) time) / 1000))) + " s"));
+    }
+    return _xblockexpression;
+  }
+}
diff --git a/Tests/hu.bme.mit.inf.dslreasoner.application.FAMTest/plugin.xml b/Tests/hu.bme.mit.inf.dslreasoner.application.FAMTest/plugin.xml
index 2f4febdb..c760d4ef 100644
--- a/Tests/hu.bme.mit.inf.dslreasoner.application.FAMTest/plugin.xml
+++ b/Tests/hu.bme.mit.inf.dslreasoner.application.FAMTest/plugin.xml
@@ -1 +1 @@
-<?xml version="1.0" encoding="UTF-8"?><plugin/>

+<?xml version="1.0" encoding="UTF-8"?><plugin/>