164 files changed, 11682 insertions, 28 deletions

diff --git a/org.eclipse.viatra.solver.language.parent/.project b/.project
index 21b452ad..21b452ad 100644
--- a/org.eclipse.viatra.solver.language.parent/.project
+++ b/.project
diff --git a/org.eclipse.viatra.solver.language.parent/.settings/org.eclipse.core.resources.prefs b/.settings/org.eclipse.core.resources.prefs
index 99f26c02..99f26c02 100644
--- a/org.eclipse.viatra.solver.language.parent/.settings/org.eclipse.core.resources.prefs
+++ b/.settings/org.eclipse.core.resources.prefs
diff --git a/org.eclipse.viatra.solver.language.parent/build.gradle b/build.gradle
index 69c33a9d..de4df91e 100644
--- a/org.eclipse.viatra.solver.language.parent/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ subprojects {
         apply from: "${rootDir}/gradle/source-layout.gradle"
         apply plugin: 'eclipse'
         
-        group = 'org.eclipse.viatra.solver.language'
+        group = 'org.eclipse.viatra.solver'
         version = '1.0.0-SNAPSHOT'
         
         sourceCompatibility = '11'
diff --git a/org.eclipse.viatra.solver.language.parent/gradle/source-layout.gradle b/gradle/source-layout.gradle
index d347fb13..5febbee3 100644
--- a/org.eclipse.viatra.solver.language.parent/gradle/source-layout.gradle
+++ b/gradle/source-layout.gradle
@@ -26,3 +26,15 @@ jar {
 plugins.withId('war') {
         webAppDirName = "src/main/webapp"
 }
+
+eclipse {
+        classpath {
+                file.whenMerged {
+                        for (entry in entries) {
+                                if (entry.path.endsWith('-gen')) {
+                                        entry.entryAttributes['ignore_optional_problems'] = true
+                                }
+                        }
+                }
+        }
+}
\ No newline at end of file
diff --git a/org.eclipse.viatra.solver.language.parent/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 5c2d1cf0..5c2d1cf0 100644
--- a/org.eclipse.viatra.solver.language.parent/gradle/wrapper/gradle-wrapper.jar
+++ b/gradle/wrapper/gradle-wrapper.jar
diff --git a/org.eclipse.viatra.solver.language.parent/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index f04d6a20..5028f28f 100644
--- a/org.eclipse.viatra.solver.language.parent/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/org.eclipse.viatra.solver.language.parent/gradlew b/gradlew
index 83f2acfd..83f2acfd 100755
--- a/org.eclipse.viatra.solver.language.parent/gradlew
+++ b/gradlew
diff --git a/org.eclipse.viatra.solver.language.parent/gradlew.bat b/gradlew.bat
index 24467a14..24467a14 100644
--- a/org.eclipse.viatra.solver.language.parent/gradlew.bat
+++ b/gradlew.bat
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.classpath b/language-ide/.classpath
index b0c652b5..c2583eb8 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.classpath
+++ b/language-ide/.classpath
@@ -10,12 +10,14 @@
                 <attributes>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/xtend-gen">
                 <attributes>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/resources">
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.gitignore b/language-ide/.gitignore
index 84c048a7..84c048a7 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.gitignore
+++ b/language-ide/.gitignore
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.project b/language-ide/.project
index bbe16f36..55c47a3f 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.project
+++ b/language-ide/.project
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <projectDescription>
-        <name>org.eclipse.viatra.solver.language</name>
+        <name>language-ide</name>
         <comment></comment>
         <projects>
         </projects>
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.settings/org.eclipse.core.resources.prefs b/language-ide/.settings/org.eclipse.core.resources.prefs
index 99f26c02..99f26c02 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.settings/org.eclipse.core.resources.prefs
+++ b/language-ide/.settings/org.eclipse.core.resources.prefs
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/build.gradle b/language-ide/build.gradle
index 1b060b13..9cc8cf52 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/build.gradle
+++ b/language-ide/build.gradle
@@ -3,7 +3,7 @@ plugins {
 }
 
 dependencies {
-        compile project(':org.eclipse.viatra.solver.language')
+        compile project(':language')
         compile "org.eclipse.xtext:org.eclipse.xtext.ide:${xtextVersion}"
         compile "org.eclipse.xtext:org.eclipse.xtext.xbase.ide:${xtextVersion}"
 }
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeModule.java b/language-ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeModule.java
index c6e41049..c6e41049 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeModule.java
+++ b/language-ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeModule.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeSetup.java b/language-ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeSetup.java
index ca1fec30..ca1fec30 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeSetup.java
+++ b/language-ide/src/main/java/org/eclipse/viatra/solver/language/ide/ProblemIdeSetup.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/java/org/eclipse/viatra/solver/language/ide/syntaxcoloring/ProblemSemanticHighlightingCalculator.java b/language-ide/src/main/java/org/eclipse/viatra/solver/language/ide/syntaxcoloring/ProblemSemanticHighlightingCalculator.java
index eee5070b..eee5070b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/java/org/eclipse/viatra/solver/language/ide/syntaxcoloring/ProblemSemanticHighlightingCalculator.java
+++ b/language-ide/src/main/java/org/eclipse/viatra/solver/language/ide/syntaxcoloring/ProblemSemanticHighlightingCalculator.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/META-INF/services/org.eclipse.xtext.ISetup b/language-ide/src/main/xtext-gen/META-INF/services/org.eclipse.xtext.ISetup
index 8e9ec892..8e9ec892 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/META-INF/services/org.eclipse.xtext.ISetup
+++ b/language-ide/src/main/xtext-gen/META-INF/services/org.eclipse.xtext.ISetup
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/AbstractProblemIdeModule.java b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/AbstractProblemIdeModule.java
index a44461f9..a44461f9 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/AbstractProblemIdeModule.java
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/AbstractProblemIdeModule.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/PartialProblemContentAssistParser.java b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/PartialProblemContentAssistParser.java
index 890ab643..890ab643 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/PartialProblemContentAssistParser.java
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/PartialProblemContentAssistParser.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/ProblemParser.java b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/ProblemParser.java
index e4142d9f..e4142d9f 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/ProblemParser.java
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/ProblemParser.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.g b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.g
index 0a7c03ba..0a7c03ba 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.g
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.g
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.tokens b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.tokens
index c0cdd3c6..c0cdd3c6 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.tokens
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblem.tokens
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemLexer.java b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemLexer.java
index e8f6f12d..e8f6f12d 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemLexer.java
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemLexer.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemParser.java b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemParser.java
index 0f70a158..0f70a158 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemParser.java
+++ b/language-ide/src/main/xtext-gen/org/eclipse/viatra/solver/language/ide/contentassist/antlr/internal/InternalProblemParser.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/.classpath b/language-model/.classpath
index 68ef59f4..2e8747d8 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/.classpath
+++ b/language-model/.classpath
@@ -4,6 +4,7 @@
                 <attributes>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/resources">
@@ -14,6 +15,5 @@
         </classpathentry>
         <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/"/>
         <classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
-        <classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
         <classpathentry kind="output" path="bin/default"/>
 </classpath>
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/.gitignore b/language-model/.gitignore
index 4a95481e..4a95481e 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/.gitignore
+++ b/language-model/.gitignore
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/.project b/language-model/.project
index 45632ed8..246372ea 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/.project
+++ b/language-model/.project
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <projectDescription>
-        <name>org.eclipse.viatra.solver.language.model</name>
+        <name>language-model</name>
         <comment></comment>
         <projects>
         </projects>
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/META-INF/MANIFEST.MF b/language-model/META-INF/MANIFEST.MF
index e1ec0cd4..66bc6985 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/META-INF/MANIFEST.MF
+++ b/language-model/META-INF/MANIFEST.MF
@@ -1,8 +1,8 @@
 Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
-Bundle-SymbolicName: org.eclipse.viatra.solver.language.model;singleton:=true
-Automatic-Module-Name: org.eclipse.viatra.solver.language.model
+Bundle-SymbolicName: language-model;singleton:=true
+Automatic-Module-Name: language-model
 Bundle-Version: 0.1.0.qualifier
 Bundle-ClassPath: .
 Bundle-Vendor: %providerName
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/build.gradle b/language-model/build.gradle
index 2f9e3257..2f9e3257 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/build.gradle
+++ b/language-model/build.gradle
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/build.properties b/language-model/build.properties
index 97e1d1b5..97e1d1b5 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/build.properties
+++ b/language-model/build.properties
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/plugin.properties b/language-model/plugin.properties
index 9050bf16..9050bf16 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/plugin.properties
+++ b/language-model/plugin.properties
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/plugin.xml b/language-model/plugin.xml
index af07e296..af07e296 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/plugin.xml
+++ b/language-model/plugin.xml
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/problem.aird b/language-model/problem.aird
index 047b72a2..047b72a2 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/problem.aird
+++ b/language-model/problem.aird
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Argument.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Argument.java
index 4857b38a..4857b38a 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Argument.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Argument.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Assertion.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Assertion.java
index 758212fb..758212fb 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Assertion.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Assertion.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Atom.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Atom.java
index d1b4d3fe..d1b4d3fe 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Atom.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Atom.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ClassDeclaration.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ClassDeclaration.java
index d0f471be..d0f471be 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ClassDeclaration.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ClassDeclaration.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Conjunction.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Conjunction.java
index df8e0cef..df8e0cef 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Conjunction.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Conjunction.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/EnumDeclaration.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/EnumDeclaration.java
index 81f2967d..81f2967d 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/EnumDeclaration.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/EnumDeclaration.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExactMultiplicity.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExactMultiplicity.java
index 413c2ad1..413c2ad1 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExactMultiplicity.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExactMultiplicity.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExistentialQuantifier.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExistentialQuantifier.java
index 1a1d5f8a..1a1d5f8a 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExistentialQuantifier.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ExistentialQuantifier.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ImplicitVariable.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ImplicitVariable.java
index 6d1793c6..6d1793c6 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ImplicitVariable.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ImplicitVariable.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Literal.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Literal.java
index acccf79b..acccf79b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Literal.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Literal.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/LogicValue.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/LogicValue.java
index 2efbd25a..2efbd25a 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/LogicValue.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/LogicValue.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Multiplicity.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Multiplicity.java
index d3d573fa..d3d573fa 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Multiplicity.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Multiplicity.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NamedElement.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NamedElement.java
index 3302b041..3302b041 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NamedElement.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NamedElement.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NegativeLiteral.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NegativeLiteral.java
index ac3aa2b9..ac3aa2b9 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NegativeLiteral.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/NegativeLiteral.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Node.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Node.java
index 3da08af3..3da08af3 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Node.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Node.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Parameter.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Parameter.java
index 7bedca1b..7bedca1b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Parameter.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Parameter.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/PredicateDefinition.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/PredicateDefinition.java
index 175d5fff..175d5fff 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/PredicateDefinition.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/PredicateDefinition.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Problem.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Problem.java
index 7e19bd22..7e19bd22 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Problem.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Problem.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemFactory.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemFactory.java
index e4332d19..e4332d19 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemFactory.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemFactory.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemPackage.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemPackage.java
index ec96501d..ec96501d 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemPackage.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ProblemPackage.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/RangeMultiplicity.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/RangeMultiplicity.java
index 65bcc440..65bcc440 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/RangeMultiplicity.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/RangeMultiplicity.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ReferenceDeclaration.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ReferenceDeclaration.java
index 38650d66..38650d66 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ReferenceDeclaration.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ReferenceDeclaration.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Relation.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Relation.java
index 2754e9d0..2754e9d0 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Relation.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Relation.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ScopeDeclaration.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ScopeDeclaration.java
index f728589d..f728589d 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ScopeDeclaration.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/ScopeDeclaration.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Statement.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Statement.java
index 90303639..90303639 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Statement.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Statement.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/TypeScope.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/TypeScope.java
index 76a95dd5..76a95dd5 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/TypeScope.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/TypeScope.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/UnboundedMultiplicity.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/UnboundedMultiplicity.java
index 725311a4..725311a4 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/UnboundedMultiplicity.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/UnboundedMultiplicity.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Variable.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Variable.java
index cba5740c..cba5740c 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Variable.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/Variable.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/VariableOrNode.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/VariableOrNode.java
index 65c315e2..65c315e2 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/VariableOrNode.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/VariableOrNode.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ArgumentImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ArgumentImpl.java
index f7d045ca..f7d045ca 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ArgumentImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ArgumentImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AssertionImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AssertionImpl.java
index 5856a276..5856a276 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AssertionImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AssertionImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AtomImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AtomImpl.java
index d70fe90b..d70fe90b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AtomImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/AtomImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ClassDeclarationImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ClassDeclarationImpl.java
index 774a6e33..774a6e33 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ClassDeclarationImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ClassDeclarationImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ConjunctionImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ConjunctionImpl.java
index 72258cc1..72258cc1 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ConjunctionImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ConjunctionImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/EnumDeclarationImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/EnumDeclarationImpl.java
index aac00423..aac00423 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/EnumDeclarationImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/EnumDeclarationImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ExactMultiplicityImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ExactMultiplicityImpl.java
index b3896ac2..b3896ac2 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ExactMultiplicityImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ExactMultiplicityImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ImplicitVariableImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ImplicitVariableImpl.java
index 03a31a16..03a31a16 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ImplicitVariableImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ImplicitVariableImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/LiteralImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/LiteralImpl.java
index c48bdb0b..c48bdb0b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/LiteralImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/LiteralImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/MultiplicityImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/MultiplicityImpl.java
index 8d769eb0..8d769eb0 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/MultiplicityImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/MultiplicityImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NamedElementImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NamedElementImpl.java
index b414013b..b414013b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NamedElementImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NamedElementImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NegativeLiteralImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NegativeLiteralImpl.java
index 857a779d..857a779d 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NegativeLiteralImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NegativeLiteralImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NodeImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NodeImpl.java
index 0c08bb1b..0c08bb1b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NodeImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/NodeImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ParameterImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ParameterImpl.java
index 06eea3f3..06eea3f3 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ParameterImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ParameterImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/PredicateDefinitionImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/PredicateDefinitionImpl.java
index 968b6de1..968b6de1 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/PredicateDefinitionImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/PredicateDefinitionImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemFactoryImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemFactoryImpl.java
index 2f4144b9..2f4144b9 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemFactoryImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemFactoryImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemImpl.java
index 191021c4..191021c4 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemPackageImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemPackageImpl.java
index d10ff2f0..d10ff2f0 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemPackageImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ProblemPackageImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RangeMultiplicityImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RangeMultiplicityImpl.java
index 1122b5be..1122b5be 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RangeMultiplicityImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RangeMultiplicityImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ReferenceDeclarationImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ReferenceDeclarationImpl.java
index 8df2715f..8df2715f 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ReferenceDeclarationImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ReferenceDeclarationImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RelationImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RelationImpl.java
index 20d43043..20d43043 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RelationImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/RelationImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ScopeDeclarationImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ScopeDeclarationImpl.java
index f178d9e0..f178d9e0 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ScopeDeclarationImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/ScopeDeclarationImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/TypeScopeImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/TypeScopeImpl.java
index 608cc015..608cc015 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/TypeScopeImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/TypeScopeImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/UnboundedMultiplicityImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/UnboundedMultiplicityImpl.java
index 34283189..34283189 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/UnboundedMultiplicityImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/UnboundedMultiplicityImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableImpl.java
index 645ac39c..645ac39c 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableOrNodeImpl.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableOrNodeImpl.java
index 4964a019..4964a019 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableOrNodeImpl.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/impl/VariableOrNodeImpl.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemAdapterFactory.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemAdapterFactory.java
index 3fc3ca75..3fc3ca75 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemAdapterFactory.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemAdapterFactory.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemSwitch.java b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemSwitch.java
index b74718b5..b74718b5 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemSwitch.java
+++ b/language-model/src/main/emf-gen/org/eclipse/viatra/solver/language/model/problem/util/ProblemSwitch.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/resources/model/problem.ecore b/language-model/src/main/resources/model/problem.ecore
index 99404f61..99404f61 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/resources/model/problem.ecore
+++ b/language-model/src/main/resources/model/problem.ecore
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/resources/model/problem.genmodel b/language-model/src/main/resources/model/problem.genmodel
index 2eb9a988..8a881ff7 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.model/src/main/resources/model/problem.genmodel
+++ b/language-model/src/main/resources/model/problem.genmodel
@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <genmodel:GenModel 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" xmlns:genmodel="http://www.eclipse.org/emf/2002/GenModel"
-    modelDirectory="/org.eclipse.viatra.solver.language.model/src/main/emf-gen"
-    creationIcons="false" editDirectory="/org.eclipse.viatra.solver.language.model.edit/src-gen"
-    editorDirectory="/org.eclipse.viatra.solver.language.model.editor/src-gen" modelPluginID="org.eclipse.viatra.solver.language.model"
-    modelName="Problem" rootExtendsClass="org.eclipse.emf.ecore.impl.MinimalEObjectImpl$Container"
+    modelDirectory="/language-model/src/main/emf-gen" creationIcons="false"
+    editDirectory="/language-edit/src/main/emf-gen" editorDirectory="/org.eclipse.viatra.solver.language.model.editor/src-gen"
+    modelPluginID="language-model" modelName="Problem" rootExtendsClass="org.eclipse.emf.ecore.impl.MinimalEObjectImpl$Container"
     codeFormatting="true" importerID="org.eclipse.emf.importer.ecore" complianceLevel="5.0"
     copyrightFields="false" operationReflection="true" importOrganizing="true">
   <foreignModel>problem.ecore</foreignModel>
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.classpath b/language-web/.classpath
index 82e9aceb..402c9caf 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.classpath
+++ b/language-web/.classpath
@@ -10,12 +10,14 @@
                 <attributes>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/xtend-gen">
                 <attributes>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/resources">
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.gitignore b/language-web/.gitignore
index 84c048a7..84c048a7 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.gitignore
+++ b/language-web/.gitignore
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.project b/language-web/.project
index 9b5a8e63..028fb4b9 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.project
+++ b/language-web/.project
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <projectDescription>
-        <name>org.eclipse.viatra.solver.language.web</name>
+        <name>language-web</name>
         <comment></comment>
         <projects>
         </projects>
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.settings/org.eclipse.core.resources.prefs b/language-web/.settings/org.eclipse.core.resources.prefs
index 99f26c02..99f26c02 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/.settings/org.eclipse.core.resources.prefs
+++ b/language-web/.settings/org.eclipse.core.resources.prefs
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/build.gradle b/language-web/build.gradle
index 495b1339..3e0008da 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/build.gradle
+++ b/language-web/build.gradle
@@ -3,8 +3,8 @@ plugins {
 }
 
 dependencies {
-        compile project(':org.eclipse.viatra.solver.language')
-        compile project(':org.eclipse.viatra.solver.language.ide')
+        compile project(':language')
+        compile project(':language-ide')
         compile "org.eclipse.xtext:org.eclipse.xtext.xbase.web:${xtextVersion}"
         compile "org.eclipse.xtext:org.eclipse.xtext.web.servlet:${xtextVersion}"
         compile "org.eclipse.xtend:org.eclipse.xtend.lib:${xtextVersion}"
@@ -34,4 +34,4 @@ eclipse {
                         natures.remove('org.eclipse.wst.common.modulecore.ModuleCoreNature')
                 }
         }
-}
\ No newline at end of file
+}
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemServlet.java b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemServlet.java
index 5de708f0..5de708f0 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemServlet.java
+++ b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemServlet.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebModule.java b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebModule.java
index 0eea7f1e..0eea7f1e 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebModule.java
+++ b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebModule.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebSetup.java b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebSetup.java
index 8d5778af..8d5778af 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebSetup.java
+++ b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ProblemWebSetup.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ServerLauncher.java b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ServerLauncher.java
index d25f4ae9..d25f4ae9 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/java/org/eclipse/viatra/solver/language/web/ServerLauncher.java
+++ b/language-web/src/main/java/org/eclipse/viatra/solver/language/web/ServerLauncher.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/index.html b/language-web/src/main/webapp/index.html
index 3fb66d62..3fb66d62 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/index.html
+++ b/language-web/src/main/webapp/index.html
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/script.js b/language-web/src/main/webapp/script.js
index dced7eca..dced7eca 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/script.js
+++ b/language-web/src/main/webapp/script.js
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/style.css b/language-web/src/main/webapp/style.css
index 9a89dd81..9a89dd81 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/style.css
+++ b/language-web/src/main/webapp/style.css
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/xtext-resources/generated/mode-problem.js b/language-web/src/main/webapp/xtext-resources/generated/mode-problem.js
index 84515ad6..89373b1c 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/webapp/xtext-resources/generated/mode-problem.js
+++ b/language-web/src/main/webapp/xtext-resources/generated/mode-problem.js
@@ -5,7 +5,6 @@ define(["codemirror", "codemirror/addon/mode/simple"], function(CodeMirror, Simp
                         {token: "comment", regex: "\\/\\/.*$"},
                         {token: "comment", regex: "\\/\\*", next : "comment"},
                         {token: "string", regex: '["](?:(?:\\\\.)|(?:[^"\\\\]))*?["]'},
-                        {token: "string", regex: "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"},
                         {token: "constant.numeric", regex: "[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"},
                         {token: "lparen", regex: "[\\[({]"},
                         {token: "rparen", regex: "[\\])}]"},
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/xtext-gen/org/eclipse/viatra/solver/language/web/AbstractProblemWebModule.java b/language-web/src/main/xtext-gen/org/eclipse/viatra/solver/language/web/AbstractProblemWebModule.java
index fefb7da3..fefb7da3 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.web/src/main/xtext-gen/org/eclipse/viatra/solver/language/web/AbstractProblemWebModule.java
+++ b/language-web/src/main/xtext-gen/org/eclipse/viatra/solver/language/web/AbstractProblemWebModule.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java
index 642b465b..642b465b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin b/language-web/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin
index cabf6537..cabf6537 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java
index 0366f9cd..0366f9cd 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java
index b7ecf3f6..b7ecf3f6 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java
index 3af86cab..3af86cab 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g
index 64db0417..64db0417 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens
index e968ac14..e968ac14 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java
index 1fd1e166..1fd1e166 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java
index 28b54551..28b54551 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java
index 5b024d47..5b024d47 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java
index cb44c31f..cb44c31f 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java
index 3f0a3f05..3f0a3f05 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java
index 4368036b..4368036b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java
index 9cd73e1e..9cd73e1e 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java b/language-web/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java
index f5a0d87d..f5a0d87d 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java
+++ b/language-web/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.classpath b/language/.classpath
index 032f6f94..058cfd22 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.classpath
+++ b/language/.classpath
@@ -8,15 +8,16 @@
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/xtext-gen">
                 <attributes>
-                        <attribute name="ignore_optional_problems" value="true"/>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/xtend-gen">
                 <attributes>
                         <attribute name="gradle_scope" value="main"/>
                         <attribute name="gradle_used_by_scope" value="main,test"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/main" path="src/main/resources">
@@ -37,6 +38,7 @@
                         <attribute name="gradle_scope" value="test"/>
                         <attribute name="gradle_used_by_scope" value="test"/>
                         <attribute name="test" value="true"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/test" path="src/test/xtend-gen">
@@ -44,6 +46,7 @@
                         <attribute name="gradle_scope" value="test"/>
                         <attribute name="gradle_used_by_scope" value="test"/>
                         <attribute name="test" value="true"/>
+                        <attribute name="ignore_optional_problems" value="true"/>
                 </attributes>
         </classpathentry>
         <classpathentry kind="src" output="bin/test" path="src/test/resources">
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.gitignore b/language/.gitignore
index 84c048a7..84c048a7 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.gitignore
+++ b/language/.gitignore
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.launch/Generate Problem (problem) Language Infrastructure.launch b/language/.launch/Generate Problem (problem) Language Infrastructure.launch
index 042ecc17..042ecc17 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.launch/Generate Problem (problem) Language Infrastructure.launch
+++ b/language/.launch/Generate Problem (problem) Language Infrastructure.launch
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.project b/language/.project
index a931f0bf..c2d3df18 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language.ide/.project
+++ b/language/.project
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <projectDescription>
-        <name>org.eclipse.viatra.solver.language.ide</name>
+        <name>language</name>
         <comment></comment>
         <projects>
         </projects>
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.settings/org.eclipse.core.resources.prefs b/language/.settings/org.eclipse.core.resources.prefs
index 99f26c02..99f26c02 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/.settings/org.eclipse.core.resources.prefs
+++ b/language/.settings/org.eclipse.core.resources.prefs
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/build.gradle b/language/build.gradle
index 558f08bb..f32a60e1 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/build.gradle
+++ b/language/build.gradle
@@ -6,7 +6,7 @@ dependencies {
         compile "org.eclipse.xtext:org.eclipse.xtext:${xtextVersion}"
         compile "org.eclipse.xtext:org.eclipse.xtext.xbase:${xtextVersion}"
         compile 'org.eclipse.emf:org.eclipse.emf.ecore'
-        compile project(':org.eclipse.viatra.solver.language.model')
+        compile project(':language-model')
 }
 
 configurations {
@@ -39,4 +39,5 @@ test {
 
 generateXtext.dependsOn(generateXtextLanguage)
 clean.dependsOn(cleanGenerateXtextLanguage)
+
 eclipse.classpath.plusConfigurations += [configurations.mwe2]
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/GenerateProblem.mwe2 b/language/src/main/java/org/eclipse/viatra/solver/language/GenerateProblem.mwe2
index 46812355..76563e2c 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/GenerateProblem.mwe2
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/GenerateProblem.mwe2
@@ -9,13 +9,17 @@ Workflow {
         component = XtextGenerator {
                 configuration = {
                         project = StandardProjectConfig {
-                                baseName = "org.eclipse.viatra.solver.language"
+                                baseName = "language"
                                 rootPath = rootPath
                                 runtimeTest = {
                                         enabled = true
                                 }
+                genericIde = {
+                    name = "language-ide"
+                }
                                 web = {
                                         enabled = true
+                    name = "language-web"
                                 }
                                 mavenLayout = true
                         }
@@ -30,7 +34,7 @@ Workflow {
                 language = StandardLanguage {
                         name = "org.eclipse.viatra.solver.language.Problem"
                         fileExtensions = "problem"
-                        referencedResource = "platform:/resource/org.eclipse.viatra.solver.language.model/model/problem.genmodel"
+                        referencedResource = "platform:/resource/language-model/model/problem.genmodel"
 
                         serializer = {
                                 generateStub = false
@@ -48,6 +52,7 @@ Workflow {
                         }
                         webSupport = {
                                 framework = "CodeMirror"
+                                suppressPattern = "string_singleQuote"
                         }
                 }
         }
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/Problem.xtext b/language/src/main/java/org/eclipse/viatra/solver/language/Problem.xtext
index 5f8b35f3..5f8b35f3 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/Problem.xtext
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/Problem.xtext
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/ProblemRuntimeModule.java b/language/src/main/java/org/eclipse/viatra/solver/language/ProblemRuntimeModule.java
index eb9ddd77..eb9ddd77 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/ProblemRuntimeModule.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/ProblemRuntimeModule.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/ProblemStandaloneSetup.java b/language/src/main/java/org/eclipse/viatra/solver/language/ProblemStandaloneSetup.java
index 5652f859..5652f859 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/ProblemStandaloneSetup.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/ProblemStandaloneSetup.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/ProblemUtil.java b/language/src/main/java/org/eclipse/viatra/solver/language/ProblemUtil.java
index 09f062f5..09f062f5 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/ProblemUtil.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/ProblemUtil.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/conversion/ProblemValueConverterService.java b/language/src/main/java/org/eclipse/viatra/solver/language/conversion/ProblemValueConverterService.java
index 4f5fd069..4f5fd069 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/conversion/ProblemValueConverterService.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/conversion/ProblemValueConverterService.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/conversion/UpperBoundValueConverter.java b/language/src/main/java/org/eclipse/viatra/solver/language/conversion/UpperBoundValueConverter.java
index 3111b69b..3111b69b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/conversion/UpperBoundValueConverter.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/conversion/UpperBoundValueConverter.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/generator/ProblemGenerator.xtend b/language/src/main/java/org/eclipse/viatra/solver/language/generator/ProblemGenerator.xtend
index 0930f244..0930f244 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/generator/ProblemGenerator.xtend
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/generator/ProblemGenerator.xtend
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/naming/ProblemQualifiedNameConverter.java b/language/src/main/java/org/eclipse/viatra/solver/language/naming/ProblemQualifiedNameConverter.java
index 3cee31f3..3cee31f3 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/naming/ProblemQualifiedNameConverter.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/naming/ProblemQualifiedNameConverter.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemDerivedStateComputer.java b/language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemDerivedStateComputer.java
index b885ce0e..b885ce0e 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemDerivedStateComputer.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemDerivedStateComputer.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemLocationInFileProvider.java b/language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemLocationInFileProvider.java
index 94dbdfee..94dbdfee 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemLocationInFileProvider.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemLocationInFileProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemResourceDescriptionStrategy.java b/language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemResourceDescriptionStrategy.java
index edb25a1c..edb25a1c 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemResourceDescriptionStrategy.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/resource/ProblemResourceDescriptionStrategy.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemGlobalScopeProvider.java b/language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemGlobalScopeProvider.java
index 05da277a..05da277a 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemGlobalScopeProvider.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemGlobalScopeProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemLocalScopeProvider.java b/language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemLocalScopeProvider.java
index e832bb09..e832bb09 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemLocalScopeProvider.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemLocalScopeProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemScopeProvider.java b/language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemScopeProvider.java
index fc4034ae..fc4034ae 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemScopeProvider.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/scoping/ProblemScopeProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/validation/ProblemValidator.java b/language/src/main/java/org/eclipse/viatra/solver/language/validation/ProblemValidator.java
index 2b17e222..2b17e222 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/java/org/eclipse/viatra/solver/language/validation/ProblemValidator.java
+++ b/language/src/main/java/org/eclipse/viatra/solver/language/validation/ProblemValidator.java
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/resources/org/eclipse/viatra/solver/language/builtin.problem b/language/src/main/resources/org/eclipse/viatra/solver/language/builtin.problem
index 49b67d5a..13398ce8 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/main/resources/org/eclipse/viatra/solver/language/builtin.problem
+++ b/language/src/main/resources/org/eclipse/viatra/solver/language/builtin.problem
@@ -14,4 +14,4 @@ class double.
 
 class int extends double.
 
-class string.
\ No newline at end of file
+class string.
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java
new file mode 100644
index 00000000..642b465b
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/AbstractProblemRuntimeModule.java
@@ -0,0 +1,201 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language;
+
+import com.google.inject.Binder;
+import com.google.inject.Provider;
+import com.google.inject.name.Names;
+import java.util.Properties;
+import org.eclipse.viatra.solver.language.generator.ProblemGenerator;
+import org.eclipse.viatra.solver.language.parser.antlr.ProblemAntlrTokenFileProvider;
+import org.eclipse.viatra.solver.language.parser.antlr.ProblemParser;
+import org.eclipse.viatra.solver.language.parser.antlr.internal.InternalProblemLexer;
+import org.eclipse.viatra.solver.language.scoping.ProblemScopeProvider;
+import org.eclipse.viatra.solver.language.serializer.ProblemSemanticSequencer;
+import org.eclipse.viatra.solver.language.serializer.ProblemSyntacticSequencer;
+import org.eclipse.viatra.solver.language.services.ProblemGrammarAccess;
+import org.eclipse.viatra.solver.language.validation.ProblemConfigurableIssueCodesProvider;
+import org.eclipse.viatra.solver.language.validation.ProblemValidator;
+import org.eclipse.xtext.Constants;
+import org.eclipse.xtext.IGrammarAccess;
+import org.eclipse.xtext.generator.IGenerator2;
+import org.eclipse.xtext.naming.DefaultDeclarativeQualifiedNameProvider;
+import org.eclipse.xtext.naming.IQualifiedNameProvider;
+import org.eclipse.xtext.parser.IParser;
+import org.eclipse.xtext.parser.ITokenToStringConverter;
+import org.eclipse.xtext.parser.antlr.AntlrTokenDefProvider;
+import org.eclipse.xtext.parser.antlr.AntlrTokenToStringConverter;
+import org.eclipse.xtext.parser.antlr.IAntlrTokenFileProvider;
+import org.eclipse.xtext.parser.antlr.ITokenDefProvider;
+import org.eclipse.xtext.parser.antlr.Lexer;
+import org.eclipse.xtext.parser.antlr.LexerBindings;
+import org.eclipse.xtext.parser.antlr.LexerProvider;
+import org.eclipse.xtext.resource.IContainer;
+import org.eclipse.xtext.resource.IResourceDescriptions;
+import org.eclipse.xtext.resource.containers.IAllContainersState;
+import org.eclipse.xtext.resource.containers.ResourceSetBasedAllContainersStateProvider;
+import org.eclipse.xtext.resource.containers.StateBasedContainerManager;
+import org.eclipse.xtext.resource.impl.ResourceDescriptionsProvider;
+import org.eclipse.xtext.resource.impl.ResourceSetBasedResourceDescriptions;
+import org.eclipse.xtext.scoping.IGlobalScopeProvider;
+import org.eclipse.xtext.scoping.IScopeProvider;
+import org.eclipse.xtext.scoping.IgnoreCaseLinking;
+import org.eclipse.xtext.scoping.impl.AbstractDeclarativeScopeProvider;
+import org.eclipse.xtext.scoping.impl.DefaultGlobalScopeProvider;
+import org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider;
+import org.eclipse.xtext.serializer.ISerializer;
+import org.eclipse.xtext.serializer.impl.Serializer;
+import org.eclipse.xtext.serializer.sequencer.ISemanticSequencer;
+import org.eclipse.xtext.serializer.sequencer.ISyntacticSequencer;
+import org.eclipse.xtext.service.DefaultRuntimeModule;
+import org.eclipse.xtext.service.SingletonBinding;
+import org.eclipse.xtext.validation.ConfigurableIssueCodesProvider;
+
+/**
+ * Manual modifications go to {@link ProblemRuntimeModule}.
+ */
+@SuppressWarnings("all")
+public abstract class AbstractProblemRuntimeModule extends DefaultRuntimeModule {
+
+        protected Properties properties = null;
+
+        @Override
+        public void configure(Binder binder) {
+                properties = tryBindProperties(binder, "org/eclipse/viatra/solver/language/Problem.properties");
+                super.configure(binder);
+        }
+        
+        public void configureLanguageName(Binder binder) {
+                binder.bind(String.class).annotatedWith(Names.named(Constants.LANGUAGE_NAME)).toInstance("org.eclipse.viatra.solver.language.Problem");
+        }
+        
+        public void configureFileExtensions(Binder binder) {
+                if (properties == null || properties.getProperty(Constants.FILE_EXTENSIONS) == null)
+                        binder.bind(String.class).annotatedWith(Names.named(Constants.FILE_EXTENSIONS)).toInstance("problem");
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.grammarAccess.GrammarAccessFragment2
+        public ClassLoader bindClassLoaderToInstance() {
+                return getClass().getClassLoader();
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.grammarAccess.GrammarAccessFragment2
+        public Class<? extends IGrammarAccess> bindIGrammarAccess() {
+                return ProblemGrammarAccess.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2
+        public Class<? extends ISemanticSequencer> bindISemanticSequencer() {
+                return ProblemSemanticSequencer.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2
+        public Class<? extends ISyntacticSequencer> bindISyntacticSequencer() {
+                return ProblemSyntacticSequencer.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2
+        public Class<? extends ISerializer> bindISerializer() {
+                return Serializer.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public Class<? extends IParser> bindIParser() {
+                return ProblemParser.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public Class<? extends ITokenToStringConverter> bindITokenToStringConverter() {
+                return AntlrTokenToStringConverter.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public Class<? extends IAntlrTokenFileProvider> bindIAntlrTokenFileProvider() {
+                return ProblemAntlrTokenFileProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public Class<? extends Lexer> bindLexer() {
+                return InternalProblemLexer.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public Class<? extends ITokenDefProvider> bindITokenDefProvider() {
+                return AntlrTokenDefProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public Provider<? extends InternalProblemLexer> provideInternalProblemLexer() {
+                return LexerProvider.create(InternalProblemLexer.class);
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment2
+        public void configureRuntimeLexer(Binder binder) {
+                binder.bind(Lexer.class)
+                        .annotatedWith(Names.named(LexerBindings.RUNTIME))
+                        .to(InternalProblemLexer.class);
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.validation.ValidatorFragment2
+        @SingletonBinding(eager=true)
+        public Class<? extends ProblemValidator> bindProblemValidator() {
+                return ProblemValidator.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.validation.ValidatorFragment2
+        public Class<? extends ConfigurableIssueCodesProvider> bindConfigurableIssueCodesProvider() {
+                return ProblemConfigurableIssueCodesProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.scoping.ImportNamespacesScopingFragment2
+        public Class<? extends IScopeProvider> bindIScopeProvider() {
+                return ProblemScopeProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.scoping.ImportNamespacesScopingFragment2
+        public void configureIScopeProviderDelegate(Binder binder) {
+                binder.bind(IScopeProvider.class).annotatedWith(Names.named(AbstractDeclarativeScopeProvider.NAMED_DELEGATE)).to(ImportedNamespaceAwareLocalScopeProvider.class);
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.scoping.ImportNamespacesScopingFragment2
+        public Class<? extends IGlobalScopeProvider> bindIGlobalScopeProvider() {
+                return DefaultGlobalScopeProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.scoping.ImportNamespacesScopingFragment2
+        public void configureIgnoreCaseLinking(Binder binder) {
+                binder.bindConstant().annotatedWith(IgnoreCaseLinking.class).to(false);
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.exporting.QualifiedNamesFragment2
+        public Class<? extends IQualifiedNameProvider> bindIQualifiedNameProvider() {
+                return DefaultDeclarativeQualifiedNameProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.builder.BuilderIntegrationFragment2
+        public Class<? extends IContainer.Manager> bindIContainer$Manager() {
+                return StateBasedContainerManager.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.builder.BuilderIntegrationFragment2
+        public Class<? extends IAllContainersState.Provider> bindIAllContainersState$Provider() {
+                return ResourceSetBasedAllContainersStateProvider.class;
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.builder.BuilderIntegrationFragment2
+        public void configureIResourceDescriptions(Binder binder) {
+                binder.bind(IResourceDescriptions.class).to(ResourceSetBasedResourceDescriptions.class);
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.builder.BuilderIntegrationFragment2
+        public void configureIResourceDescriptionsPersisted(Binder binder) {
+                binder.bind(IResourceDescriptions.class).annotatedWith(Names.named(ResourceDescriptionsProvider.PERSISTED_DESCRIPTIONS)).to(ResourceSetBasedResourceDescriptions.class);
+        }
+        
+        // contributed by org.eclipse.xtext.xtext.generator.generator.GeneratorFragment2
+        public Class<? extends IGenerator2> bindIGenerator2() {
+                return ProblemGenerator.class;
+        }
+        
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin
new file mode 100644
index 00000000..cabf6537
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/Problem.xtextbin
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java
new file mode 100644
index 00000000..0366f9cd
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/ProblemStandaloneSetupGenerated.java
@@ -0,0 +1,37 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language;
+
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import org.eclipse.emf.ecore.resource.Resource;
+import org.eclipse.xtext.ISetup;
+import org.eclipse.xtext.common.TerminalsStandaloneSetup;
+import org.eclipse.xtext.resource.IResourceFactory;
+import org.eclipse.xtext.resource.IResourceServiceProvider;
+
+@SuppressWarnings("all")
+public class ProblemStandaloneSetupGenerated implements ISetup {
+
+        @Override
+        public Injector createInjectorAndDoEMFRegistration() {
+                TerminalsStandaloneSetup.doSetup();
+
+                Injector injector = createInjector();
+                register(injector);
+                return injector;
+        }
+        
+        public Injector createInjector() {
+                return Guice.createInjector(new ProblemRuntimeModule());
+        }
+        
+        public void register(Injector injector) {
+                IResourceFactory resourceFactory = injector.getInstance(IResourceFactory.class);
+                IResourceServiceProvider serviceProvider = injector.getInstance(IResourceServiceProvider.class);
+                
+                Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put("problem", resourceFactory);
+                IResourceServiceProvider.Registry.INSTANCE.getExtensionToFactoryMap().put("problem", serviceProvider);
+        }
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java
new file mode 100644
index 00000000..b7ecf3f6
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemAntlrTokenFileProvider.java
@@ -0,0 +1,16 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.parser.antlr;
+
+import java.io.InputStream;
+import org.eclipse.xtext.parser.antlr.IAntlrTokenFileProvider;
+
+public class ProblemAntlrTokenFileProvider implements IAntlrTokenFileProvider {
+
+        @Override
+        public InputStream getAntlrTokenFile() {
+                ClassLoader classLoader = getClass().getClassLoader();
+                return classLoader.getResourceAsStream("org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens");
+        }
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java
new file mode 100644
index 00000000..3af86cab
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/ProblemParser.java
@@ -0,0 +1,40 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.parser.antlr;
+
+import com.google.inject.Inject;
+import org.eclipse.viatra.solver.language.parser.antlr.internal.InternalProblemParser;
+import org.eclipse.viatra.solver.language.services.ProblemGrammarAccess;
+import org.eclipse.xtext.parser.antlr.AbstractAntlrParser;
+import org.eclipse.xtext.parser.antlr.XtextTokenStream;
+
+public class ProblemParser extends AbstractAntlrParser {
+
+        @Inject
+        private ProblemGrammarAccess grammarAccess;
+
+        @Override
+        protected void setInitialHiddenTokens(XtextTokenStream tokenStream) {
+                tokenStream.setInitialHiddenTokens("RULE_WS", "RULE_ML_COMMENT", "RULE_SL_COMMENT");
+        }
+        
+
+        @Override
+        protected InternalProblemParser createParser(XtextTokenStream stream) {
+                return new InternalProblemParser(stream, getGrammarAccess());
+        }
+
+        @Override 
+        protected String getDefaultRuleName() {
+                return "Problem";
+        }
+
+        public ProblemGrammarAccess getGrammarAccess() {
+                return this.grammarAccess;
+        }
+
+        public void setGrammarAccess(ProblemGrammarAccess grammarAccess) {
+                this.grammarAccess = grammarAccess;
+        }
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g
new file mode 100644
index 00000000..64db0417
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.g
@@ -0,0 +1,1909 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+grammar InternalProblem;
+
+options {
+        superClass=AbstractInternalAntlrParser;
+}
+
+@lexer::header {
+package org.eclipse.viatra.solver.language.parser.antlr.internal;
+
+// Hack: Use our own Lexer superclass by means of import. 
+// Currently there is no other way to specify the superclass for the lexer.
+import org.eclipse.xtext.parser.antlr.Lexer;
+}
+
+@parser::header {
+package org.eclipse.viatra.solver.language.parser.antlr.internal;
+
+import org.eclipse.xtext.*;
+import org.eclipse.xtext.parser.*;
+import org.eclipse.xtext.parser.impl.*;
+import org.eclipse.emf.ecore.util.EcoreUtil;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.common.util.Enumerator;
+import org.eclipse.xtext.parser.antlr.AbstractInternalAntlrParser;
+import org.eclipse.xtext.parser.antlr.XtextTokenStream;
+import org.eclipse.xtext.parser.antlr.XtextTokenStream.HiddenTokens;
+import org.eclipse.xtext.parser.antlr.AntlrDatatypeRuleToken;
+import org.eclipse.viatra.solver.language.services.ProblemGrammarAccess;
+
+}
+
+@parser::members {
+
+        private ProblemGrammarAccess grammarAccess;
+
+    public InternalProblemParser(TokenStream input, ProblemGrammarAccess grammarAccess) {
+        this(input);
+        this.grammarAccess = grammarAccess;
+        registerRules(grammarAccess.getGrammar());
+    }
+
+    @Override
+    protected String getFirstRuleName() {
+        return "Problem";
+        }
+
+        @Override
+        protected ProblemGrammarAccess getGrammarAccess() {
+                return grammarAccess;
+        }
+
+}
+
+@rulecatch {
+    catch (RecognitionException re) {
+        recover(input,re);
+        appendSkippedTokens();
+    }
+}
+
+// Entry rule entryRuleProblem
+entryRuleProblem returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getProblemRule()); }
+        iv_ruleProblem=ruleProblem
+        { $current=$iv_ruleProblem.current; }
+        EOF;
+
+// Rule Problem
+ruleProblem returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        otherlv_0='problem'
+                        {
+                                newLeafNode(otherlv_0, grammarAccess.getProblemAccess().getProblemKeyword_0_0());
+                        }
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getProblemAccess().getNameIdentifierParserRuleCall_0_1_0());
+                                        }
+                                        lv_name_1_0=ruleIdentifier
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getProblemRule());
+                                                }
+                                                set(
+                                                        $current,
+                                                        "name",
+                                                        lv_name_1_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                        otherlv_2='.'
+                        {
+                                newLeafNode(otherlv_2, grammarAccess.getProblemAccess().getFullStopKeyword_0_2());
+                        }
+                )?
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getProblemAccess().getStatementsStatementParserRuleCall_1_0());
+                                }
+                                lv_statements_3_0=ruleStatement
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getProblemRule());
+                                        }
+                                        add(
+                                                $current,
+                                                "statements",
+                                                lv_statements_3_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Statement");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )*
+        )
+;
+
+// Entry rule entryRuleStatement
+entryRuleStatement returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getStatementRule()); }
+        iv_ruleStatement=ruleStatement
+        { $current=$iv_ruleStatement.current; }
+        EOF;
+
+// Rule Statement
+ruleStatement returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                {
+                        newCompositeNode(grammarAccess.getStatementAccess().getClassDeclarationParserRuleCall_0());
+                }
+                this_ClassDeclaration_0=ruleClassDeclaration
+                {
+                        $current = $this_ClassDeclaration_0.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getStatementAccess().getEnumDeclarationParserRuleCall_1());
+                }
+                this_EnumDeclaration_1=ruleEnumDeclaration
+                {
+                        $current = $this_EnumDeclaration_1.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getStatementAccess().getPredicateDefinitionParserRuleCall_2());
+                }
+                this_PredicateDefinition_2=rulePredicateDefinition
+                {
+                        $current = $this_PredicateDefinition_2.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getStatementAccess().getAssertionParserRuleCall_3());
+                }
+                this_Assertion_3=ruleAssertion
+                {
+                        $current = $this_Assertion_3.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getStatementAccess().getScopeDeclarationParserRuleCall_4());
+                }
+                this_ScopeDeclaration_4=ruleScopeDeclaration
+                {
+                        $current = $this_ScopeDeclaration_4.current;
+                        afterParserOrEnumRuleCall();
+                }
+        )
+;
+
+// Entry rule entryRuleClassDeclaration
+entryRuleClassDeclaration returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getClassDeclarationRule()); }
+        iv_ruleClassDeclaration=ruleClassDeclaration
+        { $current=$iv_ruleClassDeclaration.current; }
+        EOF;
+
+// Rule ClassDeclaration
+ruleClassDeclaration returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                lv_abstract_0_0='abstract'
+                                {
+                                        newLeafNode(lv_abstract_0_0, grammarAccess.getClassDeclarationAccess().getAbstractAbstractKeyword_0_0());
+                                }
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getClassDeclarationRule());
+                                        }
+                                        setWithLastConsumed($current, "abstract", lv_abstract_0_0 != null, "abstract");
+                                }
+                        )
+                )?
+                otherlv_1='class'
+                {
+                        newLeafNode(otherlv_1, grammarAccess.getClassDeclarationAccess().getClassKeyword_1());
+                }
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getClassDeclarationAccess().getNameIdentifierParserRuleCall_2_0());
+                                }
+                                lv_name_2_0=ruleIdentifier
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getClassDeclarationRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "name",
+                                                lv_name_2_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        otherlv_3='extends'
+                        {
+                                newLeafNode(otherlv_3, grammarAccess.getClassDeclarationAccess().getExtendsKeyword_3_0());
+                        }
+                        (
+                                (
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElement(grammarAccess.getClassDeclarationRule());
+                                                }
+                                        }
+                                        {
+                                                newCompositeNode(grammarAccess.getClassDeclarationAccess().getSuperTypesRelationCrossReference_3_1_0());
+                                        }
+                                        ruleQualifiedName
+                                        {
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                        (
+                                otherlv_5=','
+                                {
+                                        newLeafNode(otherlv_5, grammarAccess.getClassDeclarationAccess().getCommaKeyword_3_2_0());
+                                }
+                                (
+                                        (
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElement(grammarAccess.getClassDeclarationRule());
+                                                        }
+                                                }
+                                                {
+                                                        newCompositeNode(grammarAccess.getClassDeclarationAccess().getSuperTypesRelationCrossReference_3_2_1_0());
+                                                }
+                                                ruleQualifiedName
+                                                {
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                        )*
+                )?
+                (
+                        (
+                                otherlv_7='{'
+                                {
+                                        newLeafNode(otherlv_7, grammarAccess.getClassDeclarationAccess().getLeftCurlyBracketKeyword_4_0_0());
+                                }
+                                (
+                                        (
+                                                (
+                                                        {
+                                                                newCompositeNode(grammarAccess.getClassDeclarationAccess().getReferenceDeclarationsReferenceDeclarationParserRuleCall_4_0_1_0_0());
+                                                        }
+                                                        lv_referenceDeclarations_8_0=ruleReferenceDeclaration
+                                                        {
+                                                                if ($current==null) {
+                                                                        $current = createModelElementForParent(grammarAccess.getClassDeclarationRule());
+                                                                }
+                                                                add(
+                                                                        $current,
+                                                                        "referenceDeclarations",
+                                                                        lv_referenceDeclarations_8_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.ReferenceDeclaration");
+                                                                afterParserOrEnumRuleCall();
+                                                        }
+                                                )
+                                        )
+                                        (
+                                                otherlv_9=';'
+                                                {
+                                                        newLeafNode(otherlv_9, grammarAccess.getClassDeclarationAccess().getSemicolonKeyword_4_0_1_1());
+                                                }
+                                        )?
+                                )*
+                                otherlv_10='}'
+                                {
+                                        newLeafNode(otherlv_10, grammarAccess.getClassDeclarationAccess().getRightCurlyBracketKeyword_4_0_2());
+                                }
+                        )
+                            |
+                        otherlv_11='.'
+                        {
+                                newLeafNode(otherlv_11, grammarAccess.getClassDeclarationAccess().getFullStopKeyword_4_1());
+                        }
+                )
+        )
+;
+
+// Entry rule entryRuleEnumDeclaration
+entryRuleEnumDeclaration returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getEnumDeclarationRule()); }
+        iv_ruleEnumDeclaration=ruleEnumDeclaration
+        { $current=$iv_ruleEnumDeclaration.current; }
+        EOF;
+
+// Rule EnumDeclaration
+ruleEnumDeclaration returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                otherlv_0='enum'
+                {
+                        newLeafNode(otherlv_0, grammarAccess.getEnumDeclarationAccess().getEnumKeyword_0());
+                }
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getEnumDeclarationAccess().getNameIdentifierParserRuleCall_1_0());
+                                }
+                                lv_name_1_0=ruleIdentifier
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getEnumDeclarationRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "name",
+                                                lv_name_1_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        (
+                                otherlv_2='{'
+                                {
+                                        newLeafNode(otherlv_2, grammarAccess.getEnumDeclarationAccess().getLeftCurlyBracketKeyword_2_0_0());
+                                }
+                                (
+                                        (
+                                                (
+                                                        {
+                                                                newCompositeNode(grammarAccess.getEnumDeclarationAccess().getLiteralsEnumLiteralParserRuleCall_2_0_1_0_0());
+                                                        }
+                                                        lv_literals_3_0=ruleEnumLiteral
+                                                        {
+                                                                if ($current==null) {
+                                                                        $current = createModelElementForParent(grammarAccess.getEnumDeclarationRule());
+                                                                }
+                                                                add(
+                                                                        $current,
+                                                                        "literals",
+                                                                        lv_literals_3_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.EnumLiteral");
+                                                                afterParserOrEnumRuleCall();
+                                                        }
+                                                )
+                                        )
+                                        (
+                                                otherlv_4=','
+                                                {
+                                                        newLeafNode(otherlv_4, grammarAccess.getEnumDeclarationAccess().getCommaKeyword_2_0_1_1_0());
+                                                }
+                                                (
+                                                        (
+                                                                {
+                                                                        newCompositeNode(grammarAccess.getEnumDeclarationAccess().getLiteralsEnumLiteralParserRuleCall_2_0_1_1_1_0());
+                                                                }
+                                                                lv_literals_5_0=ruleEnumLiteral
+                                                                {
+                                                                        if ($current==null) {
+                                                                                $current = createModelElementForParent(grammarAccess.getEnumDeclarationRule());
+                                                                        }
+                                                                        add(
+                                                                                $current,
+                                                                                "literals",
+                                                                                lv_literals_5_0,
+                                                                                "org.eclipse.viatra.solver.language.Problem.EnumLiteral");
+                                                                        afterParserOrEnumRuleCall();
+                                                                }
+                                                        )
+                                                )
+                                        )*
+                                        (
+                                                otherlv_6=','
+                                                {
+                                                        newLeafNode(otherlv_6, grammarAccess.getEnumDeclarationAccess().getCommaKeyword_2_0_1_2_0());
+                                                }
+                                                    |
+                                                otherlv_7=';'
+                                                {
+                                                        newLeafNode(otherlv_7, grammarAccess.getEnumDeclarationAccess().getSemicolonKeyword_2_0_1_2_1());
+                                                }
+                                        )?
+                                )?
+                                otherlv_8='}'
+                                {
+                                        newLeafNode(otherlv_8, grammarAccess.getEnumDeclarationAccess().getRightCurlyBracketKeyword_2_0_2());
+                                }
+                        )
+                            |
+                        otherlv_9='.'
+                        {
+                                newLeafNode(otherlv_9, grammarAccess.getEnumDeclarationAccess().getFullStopKeyword_2_1());
+                        }
+                )
+        )
+;
+
+// Entry rule entryRuleEnumLiteral
+entryRuleEnumLiteral returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getEnumLiteralRule()); }
+        iv_ruleEnumLiteral=ruleEnumLiteral
+        { $current=$iv_ruleEnumLiteral.current; }
+        EOF;
+
+// Rule EnumLiteral
+ruleEnumLiteral returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        {
+                                newCompositeNode(grammarAccess.getEnumLiteralAccess().getNameQuotedOrUnquotedIdParserRuleCall_0());
+                        }
+                        lv_name_0_0=ruleQuotedOrUnquotedId
+                        {
+                                if ($current==null) {
+                                        $current = createModelElementForParent(grammarAccess.getEnumLiteralRule());
+                                }
+                                set(
+                                        $current,
+                                        "name",
+                                        lv_name_0_0,
+                                        "org.eclipse.viatra.solver.language.Problem.QuotedOrUnquotedId");
+                                afterParserOrEnumRuleCall();
+                        }
+                )
+        )
+;
+
+// Entry rule entryRuleReferenceDeclaration
+entryRuleReferenceDeclaration returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getReferenceDeclarationRule()); }
+        iv_ruleReferenceDeclaration=ruleReferenceDeclaration
+        { $current=$iv_ruleReferenceDeclaration.current; }
+        EOF;
+
+// Rule ReferenceDeclaration
+ruleReferenceDeclaration returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                (
+                                        lv_containment_0_0='contains'
+                                        {
+                                                newLeafNode(lv_containment_0_0, grammarAccess.getReferenceDeclarationAccess().getContainmentContainsKeyword_0_0_0());
+                                        }
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElement(grammarAccess.getReferenceDeclarationRule());
+                                                }
+                                                setWithLastConsumed($current, "containment", lv_containment_0_0 != null, "contains");
+                                        }
+                                )
+                        )
+                            |
+                        otherlv_1='refers'
+                        {
+                                newLeafNode(otherlv_1, grammarAccess.getReferenceDeclarationAccess().getRefersKeyword_0_1());
+                        }
+                )?
+                (
+                        (
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getReferenceDeclarationRule());
+                                        }
+                                }
+                                {
+                                        newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getReferenceTypeRelationCrossReference_1_0());
+                                }
+                                ruleQualifiedName
+                                {
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        otherlv_3='['
+                        {
+                                newLeafNode(otherlv_3, grammarAccess.getReferenceDeclarationAccess().getLeftSquareBracketKeyword_2_0());
+                        }
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getMultiplicityMultiplicityParserRuleCall_2_1_0());
+                                        }
+                                        lv_multiplicity_4_0=ruleMultiplicity
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getReferenceDeclarationRule());
+                                                }
+                                                set(
+                                                        $current,
+                                                        "multiplicity",
+                                                        lv_multiplicity_4_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Multiplicity");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                        otherlv_5=']'
+                        {
+                                newLeafNode(otherlv_5, grammarAccess.getReferenceDeclarationAccess().getRightSquareBracketKeyword_2_2());
+                        }
+                )?
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getNameIdentifierParserRuleCall_3_0());
+                                }
+                                lv_name_6_0=ruleIdentifier
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getReferenceDeclarationRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "name",
+                                                lv_name_6_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        otherlv_7='opposite'
+                        {
+                                newLeafNode(otherlv_7, grammarAccess.getReferenceDeclarationAccess().getOppositeKeyword_4_0());
+                        }
+                        (
+                                (
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElement(grammarAccess.getReferenceDeclarationRule());
+                                                }
+                                        }
+                                        {
+                                                newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getOppositeReferenceDeclarationCrossReference_4_1_0());
+                                        }
+                                        ruleQualifiedName
+                                        {
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                )?
+        )
+;
+
+// Entry rule entryRulePredicateDefinition
+entryRulePredicateDefinition returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getPredicateDefinitionRule()); }
+        iv_rulePredicateDefinition=rulePredicateDefinition
+        { $current=$iv_rulePredicateDefinition.current; }
+        EOF;
+
+// Rule PredicateDefinition
+rulePredicateDefinition returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                (
+                                        (
+                                                lv_error_0_0='error'
+                                                {
+                                                        newLeafNode(lv_error_0_0, grammarAccess.getPredicateDefinitionAccess().getErrorErrorKeyword_0_0_0_0());
+                                                }
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElement(grammarAccess.getPredicateDefinitionRule());
+                                                        }
+                                                        setWithLastConsumed($current, "error", lv_error_0_0 != null, "error");
+                                                }
+                                        )
+                                )
+                                (
+                                        otherlv_1='pred'
+                                        {
+                                                newLeafNode(otherlv_1, grammarAccess.getPredicateDefinitionAccess().getPredKeyword_0_0_1());
+                                        }
+                                )?
+                        )
+                            |
+                        otherlv_2='pred'
+                        {
+                                newLeafNode(otherlv_2, grammarAccess.getPredicateDefinitionAccess().getPredKeyword_0_1());
+                        }
+                )
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getNameIdentifierParserRuleCall_1_0());
+                                }
+                                lv_name_3_0=ruleIdentifier
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "name",
+                                                lv_name_3_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                otherlv_4='('
+                {
+                        newLeafNode(otherlv_4, grammarAccess.getPredicateDefinitionAccess().getLeftParenthesisKeyword_2());
+                }
+                (
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getParametersParameterParserRuleCall_3_0_0());
+                                        }
+                                        lv_parameters_5_0=ruleParameter
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                }
+                                                add(
+                                                        $current,
+                                                        "parameters",
+                                                        lv_parameters_5_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Parameter");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                        (
+                                otherlv_6=','
+                                {
+                                        newLeafNode(otherlv_6, grammarAccess.getPredicateDefinitionAccess().getCommaKeyword_3_1_0());
+                                }
+                                (
+                                        (
+                                                {
+                                                        newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getParametersParameterParserRuleCall_3_1_1_0());
+                                                }
+                                                lv_parameters_7_0=ruleParameter
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                        }
+                                                        add(
+                                                                $current,
+                                                                "parameters",
+                                                                lv_parameters_7_0,
+                                                                "org.eclipse.viatra.solver.language.Problem.Parameter");
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                        )*
+                )?
+                otherlv_8=')'
+                {
+                        newLeafNode(otherlv_8, grammarAccess.getPredicateDefinitionAccess().getRightParenthesisKeyword_4());
+                }
+                (
+                        otherlv_9=':-'
+                        {
+                                newLeafNode(otherlv_9, grammarAccess.getPredicateDefinitionAccess().getColonHyphenMinusKeyword_5_0());
+                        }
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getBodiesConjunctionParserRuleCall_5_1_0());
+                                        }
+                                        lv_bodies_10_0=ruleConjunction
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                }
+                                                add(
+                                                        $current,
+                                                        "bodies",
+                                                        lv_bodies_10_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Conjunction");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                        (
+                                otherlv_11=';'
+                                {
+                                        newLeafNode(otherlv_11, grammarAccess.getPredicateDefinitionAccess().getSemicolonKeyword_5_2_0());
+                                }
+                                (
+                                        (
+                                                {
+                                                        newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getBodiesConjunctionParserRuleCall_5_2_1_0());
+                                                }
+                                                lv_bodies_12_0=ruleConjunction
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                        }
+                                                        add(
+                                                                $current,
+                                                                "bodies",
+                                                                lv_bodies_12_0,
+                                                                "org.eclipse.viatra.solver.language.Problem.Conjunction");
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                        )*
+                )?
+                otherlv_13='.'
+                {
+                        newLeafNode(otherlv_13, grammarAccess.getPredicateDefinitionAccess().getFullStopKeyword_6());
+                }
+        )
+;
+
+// Entry rule entryRuleParameter
+entryRuleParameter returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getParameterRule()); }
+        iv_ruleParameter=ruleParameter
+        { $current=$iv_ruleParameter.current; }
+        EOF;
+
+// Rule Parameter
+ruleParameter returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getParameterRule());
+                                        }
+                                }
+                                {
+                                        newCompositeNode(grammarAccess.getParameterAccess().getParameterTypeRelationCrossReference_0_0());
+                                }
+                                ruleQualifiedName
+                                {
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )?
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getParameterAccess().getNameIdentifierParserRuleCall_1_0());
+                                }
+                                lv_name_1_0=ruleIdentifier
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getParameterRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "name",
+                                                lv_name_1_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+        )
+;
+
+// Entry rule entryRuleConjunction
+entryRuleConjunction returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getConjunctionRule()); }
+        iv_ruleConjunction=ruleConjunction
+        { $current=$iv_ruleConjunction.current; }
+        EOF;
+
+// Rule Conjunction
+ruleConjunction returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getConjunctionAccess().getLiteralsLiteralParserRuleCall_0_0());
+                                }
+                                lv_literals_0_0=ruleLiteral
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getConjunctionRule());
+                                        }
+                                        add(
+                                                $current,
+                                                "literals",
+                                                lv_literals_0_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Literal");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        otherlv_1=','
+                        {
+                                newLeafNode(otherlv_1, grammarAccess.getConjunctionAccess().getCommaKeyword_1_0());
+                        }
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getConjunctionAccess().getLiteralsLiteralParserRuleCall_1_1_0());
+                                        }
+                                        lv_literals_2_0=ruleLiteral
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getConjunctionRule());
+                                                }
+                                                add(
+                                                        $current,
+                                                        "literals",
+                                                        lv_literals_2_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Literal");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                )*
+        )
+;
+
+// Entry rule entryRuleLiteral
+entryRuleLiteral returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getLiteralRule()); }
+        iv_ruleLiteral=ruleLiteral
+        { $current=$iv_ruleLiteral.current; }
+        EOF;
+
+// Rule Literal
+ruleLiteral returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                {
+                        newCompositeNode(grammarAccess.getLiteralAccess().getAtomParserRuleCall_0());
+                }
+                this_Atom_0=ruleAtom
+                {
+                        $current = $this_Atom_0.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getLiteralAccess().getNegativeLiteralParserRuleCall_1());
+                }
+                this_NegativeLiteral_1=ruleNegativeLiteral
+                {
+                        $current = $this_NegativeLiteral_1.current;
+                        afterParserOrEnumRuleCall();
+                }
+        )
+;
+
+// Entry rule entryRuleNegativeLiteral
+entryRuleNegativeLiteral returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getNegativeLiteralRule()); }
+        iv_ruleNegativeLiteral=ruleNegativeLiteral
+        { $current=$iv_ruleNegativeLiteral.current; }
+        EOF;
+
+// Rule NegativeLiteral
+ruleNegativeLiteral returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                otherlv_0='!'
+                {
+                        newLeafNode(otherlv_0, grammarAccess.getNegativeLiteralAccess().getExclamationMarkKeyword_0());
+                }
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getNegativeLiteralAccess().getAtomAtomParserRuleCall_1_0());
+                                }
+                                lv_atom_1_0=ruleAtom
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getNegativeLiteralRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "atom",
+                                                lv_atom_1_0,
+                                                "org.eclipse.viatra.solver.language.Problem.Atom");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+        )
+;
+
+// Entry rule entryRuleAtom
+entryRuleAtom returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getAtomRule()); }
+        iv_ruleAtom=ruleAtom
+        { $current=$iv_ruleAtom.current; }
+        EOF;
+
+// Rule Atom
+ruleAtom returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getAtomRule());
+                                        }
+                                }
+                                {
+                                        newCompositeNode(grammarAccess.getAtomAccess().getRelationRelationCrossReference_0_0());
+                                }
+                                ruleQualifiedName
+                                {
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        (
+                                lv_transitiveClosure_1_0='+'
+                                {
+                                        newLeafNode(lv_transitiveClosure_1_0, grammarAccess.getAtomAccess().getTransitiveClosurePlusSignKeyword_1_0());
+                                }
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getAtomRule());
+                                        }
+                                        setWithLastConsumed($current, "transitiveClosure", lv_transitiveClosure_1_0 != null, "+");
+                                }
+                        )
+                )?
+                otherlv_2='('
+                {
+                        newLeafNode(otherlv_2, grammarAccess.getAtomAccess().getLeftParenthesisKeyword_2());
+                }
+                (
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getAtomAccess().getArgumentsArgumentParserRuleCall_3_0_0());
+                                        }
+                                        lv_arguments_3_0=ruleArgument
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getAtomRule());
+                                                }
+                                                add(
+                                                        $current,
+                                                        "arguments",
+                                                        lv_arguments_3_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Argument");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                        (
+                                otherlv_4=','
+                                {
+                                        newLeafNode(otherlv_4, grammarAccess.getAtomAccess().getCommaKeyword_3_1_0());
+                                }
+                                (
+                                        (
+                                                {
+                                                        newCompositeNode(grammarAccess.getAtomAccess().getArgumentsArgumentParserRuleCall_3_1_1_0());
+                                                }
+                                                lv_arguments_5_0=ruleArgument
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElementForParent(grammarAccess.getAtomRule());
+                                                        }
+                                                        add(
+                                                                $current,
+                                                                "arguments",
+                                                                lv_arguments_5_0,
+                                                                "org.eclipse.viatra.solver.language.Problem.Argument");
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                        )*
+                )?
+                otherlv_6=')'
+                {
+                        newLeafNode(otherlv_6, grammarAccess.getAtomAccess().getRightParenthesisKeyword_4());
+                }
+        )
+;
+
+// Entry rule entryRuleArgument
+entryRuleArgument returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getArgumentRule()); }
+        iv_ruleArgument=ruleArgument
+        { $current=$iv_ruleArgument.current; }
+        EOF;
+
+// Rule Argument
+ruleArgument returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        {
+                                if ($current==null) {
+                                        $current = createModelElement(grammarAccess.getArgumentRule());
+                                }
+                        }
+                        {
+                                newCompositeNode(grammarAccess.getArgumentAccess().getVariableOrNodeVariableOrNodeCrossReference_0());
+                        }
+                        ruleQualifiedName
+                        {
+                                afterParserOrEnumRuleCall();
+                        }
+                )
+        )
+;
+
+// Entry rule entryRuleAssertion
+entryRuleAssertion returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getAssertionRule()); }
+        iv_ruleAssertion=ruleAssertion
+        { $current=$iv_ruleAssertion.current; }
+        EOF;
+
+// Rule Assertion
+ruleAssertion returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                (
+                                        (
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElement(grammarAccess.getAssertionRule());
+                                                        }
+                                                }
+                                                {
+                                                        newCompositeNode(grammarAccess.getAssertionAccess().getRelationRelationCrossReference_0_0_0_0());
+                                                }
+                                                ruleQualifiedName
+                                                {
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                                otherlv_1='('
+                                {
+                                        newLeafNode(otherlv_1, grammarAccess.getAssertionAccess().getLeftParenthesisKeyword_0_0_1());
+                                }
+                                (
+                                        (
+                                                (
+                                                        {
+                                                                if ($current==null) {
+                                                                        $current = createModelElement(grammarAccess.getAssertionRule());
+                                                                }
+                                                        }
+                                                        {
+                                                                newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_0_2_0_0());
+                                                        }
+                                                        ruleQualifiedName
+                                                        {
+                                                                afterParserOrEnumRuleCall();
+                                                        }
+                                                )
+                                        )
+                                        (
+                                                otherlv_3=','
+                                                {
+                                                        newLeafNode(otherlv_3, grammarAccess.getAssertionAccess().getCommaKeyword_0_0_2_1_0());
+                                                }
+                                                (
+                                                        (
+                                                                {
+                                                                        if ($current==null) {
+                                                                                $current = createModelElement(grammarAccess.getAssertionRule());
+                                                                        }
+                                                                }
+                                                                {
+                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_0_2_1_1_0());
+                                                                }
+                                                                ruleQualifiedName
+                                                                {
+                                                                        afterParserOrEnumRuleCall();
+                                                                }
+                                                        )
+                                                )
+                                        )*
+                                )?
+                                otherlv_5=')'
+                                {
+                                        newLeafNode(otherlv_5, grammarAccess.getAssertionAccess().getRightParenthesisKeyword_0_0_3());
+                                }
+                                otherlv_6=':'
+                                {
+                                        newLeafNode(otherlv_6, grammarAccess.getAssertionAccess().getColonKeyword_0_0_4());
+                                }
+                                (
+                                        (
+                                                {
+                                                        newCompositeNode(grammarAccess.getAssertionAccess().getValueLogicValueEnumRuleCall_0_0_5_0());
+                                                }
+                                                lv_value_7_0=ruleLogicValue
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElementForParent(grammarAccess.getAssertionRule());
+                                                        }
+                                                        set(
+                                                                $current,
+                                                                "value",
+                                                                lv_value_7_0,
+                                                                "org.eclipse.viatra.solver.language.Problem.LogicValue");
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                        )
+                            |
+                        (
+                                (
+                                        (
+                                                {
+                                                        newCompositeNode(grammarAccess.getAssertionAccess().getValueShortLogicValueEnumRuleCall_0_1_0_0());
+                                                }
+                                                lv_value_8_0=ruleShortLogicValue
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElementForParent(grammarAccess.getAssertionRule());
+                                                        }
+                                                        set(
+                                                                $current,
+                                                                "value",
+                                                                lv_value_8_0,
+                                                                "org.eclipse.viatra.solver.language.Problem.ShortLogicValue");
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )?
+                                (
+                                        (
+                                                {
+                                                        if ($current==null) {
+                                                                $current = createModelElement(grammarAccess.getAssertionRule());
+                                                        }
+                                                }
+                                                {
+                                                        newCompositeNode(grammarAccess.getAssertionAccess().getRelationRelationCrossReference_0_1_1_0());
+                                                }
+                                                ruleQualifiedName
+                                                {
+                                                        afterParserOrEnumRuleCall();
+                                                }
+                                        )
+                                )
+                                otherlv_10='('
+                                {
+                                        newLeafNode(otherlv_10, grammarAccess.getAssertionAccess().getLeftParenthesisKeyword_0_1_2());
+                                }
+                                (
+                                        (
+                                                (
+                                                        {
+                                                                if ($current==null) {
+                                                                        $current = createModelElement(grammarAccess.getAssertionRule());
+                                                                }
+                                                        }
+                                                        {
+                                                                newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_1_3_0_0());
+                                                        }
+                                                        ruleQualifiedName
+                                                        {
+                                                                afterParserOrEnumRuleCall();
+                                                        }
+                                                )
+                                        )
+                                        (
+                                                otherlv_12=','
+                                                {
+                                                        newLeafNode(otherlv_12, grammarAccess.getAssertionAccess().getCommaKeyword_0_1_3_1_0());
+                                                }
+                                                (
+                                                        (
+                                                                {
+                                                                        if ($current==null) {
+                                                                                $current = createModelElement(grammarAccess.getAssertionRule());
+                                                                        }
+                                                                }
+                                                                {
+                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_1_3_1_1_0());
+                                                                }
+                                                                ruleQualifiedName
+                                                                {
+                                                                        afterParserOrEnumRuleCall();
+                                                                }
+                                                        )
+                                                )
+                                        )*
+                                )?
+                                otherlv_14=')'
+                                {
+                                        newLeafNode(otherlv_14, grammarAccess.getAssertionAccess().getRightParenthesisKeyword_0_1_4());
+                                }
+                        )
+                )
+                otherlv_15='.'
+                {
+                        newLeafNode(otherlv_15, grammarAccess.getAssertionAccess().getFullStopKeyword_1());
+                }
+        )
+;
+
+// Entry rule entryRuleScopeDeclaration
+entryRuleScopeDeclaration returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getScopeDeclarationRule()); }
+        iv_ruleScopeDeclaration=ruleScopeDeclaration
+        { $current=$iv_ruleScopeDeclaration.current; }
+        EOF;
+
+// Rule ScopeDeclaration
+ruleScopeDeclaration returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                otherlv_0='scope'
+                {
+                        newLeafNode(otherlv_0, grammarAccess.getScopeDeclarationAccess().getScopeKeyword_0());
+                }
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getScopeDeclarationAccess().getTypeScopesTypeScopeParserRuleCall_1_0());
+                                }
+                                lv_typeScopes_1_0=ruleTypeScope
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getScopeDeclarationRule());
+                                        }
+                                        add(
+                                                $current,
+                                                "typeScopes",
+                                                lv_typeScopes_1_0,
+                                                "org.eclipse.viatra.solver.language.Problem.TypeScope");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+                (
+                        otherlv_2=','
+                        {
+                                newLeafNode(otherlv_2, grammarAccess.getScopeDeclarationAccess().getCommaKeyword_2_0());
+                        }
+                        (
+                                (
+                                        {
+                                                newCompositeNode(grammarAccess.getScopeDeclarationAccess().getTypeScopesTypeScopeParserRuleCall_2_1_0());
+                                        }
+                                        lv_typeScopes_3_0=ruleTypeScope
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElementForParent(grammarAccess.getScopeDeclarationRule());
+                                                }
+                                                add(
+                                                        $current,
+                                                        "typeScopes",
+                                                        lv_typeScopes_3_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.TypeScope");
+                                                afterParserOrEnumRuleCall();
+                                        }
+                                )
+                        )
+                )*
+                otherlv_4='.'
+                {
+                        newLeafNode(otherlv_4, grammarAccess.getScopeDeclarationAccess().getFullStopKeyword_3());
+                }
+        )
+;
+
+// Entry rule entryRuleTypeScope
+entryRuleTypeScope returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getTypeScopeRule()); }
+        iv_ruleTypeScope=ruleTypeScope
+        { $current=$iv_ruleTypeScope.current; }
+        EOF;
+
+// Rule TypeScope
+ruleTypeScope returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getTypeScopeRule());
+                                        }
+                                }
+                                otherlv_0=RULE_ID
+                                {
+                                        newLeafNode(otherlv_0, grammarAccess.getTypeScopeAccess().getTargetTypeClassDeclarationCrossReference_0_0());
+                                }
+                        )
+                )
+                (
+                        (
+                                (
+                                        lv_increment_1_0='+='
+                                        {
+                                                newLeafNode(lv_increment_1_0, grammarAccess.getTypeScopeAccess().getIncrementPlusSignEqualsSignKeyword_1_0_0());
+                                        }
+                                        {
+                                                if ($current==null) {
+                                                        $current = createModelElement(grammarAccess.getTypeScopeRule());
+                                                }
+                                                setWithLastConsumed($current, "increment", lv_increment_1_0 != null, "+=");
+                                        }
+                                )
+                        )
+                            |
+                        otherlv_2='='
+                        {
+                                newLeafNode(otherlv_2, grammarAccess.getTypeScopeAccess().getEqualsSignKeyword_1_1());
+                        }
+                )
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getTypeScopeAccess().getMultiplicityDefiniteMultiplicityParserRuleCall_2_0());
+                                }
+                                lv_multiplicity_3_0=ruleDefiniteMultiplicity
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getTypeScopeRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "multiplicity",
+                                                lv_multiplicity_3_0,
+                                                "org.eclipse.viatra.solver.language.Problem.DefiniteMultiplicity");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+        )
+;
+
+// Entry rule entryRuleMultiplicity
+entryRuleMultiplicity returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getMultiplicityRule()); }
+        iv_ruleMultiplicity=ruleMultiplicity
+        { $current=$iv_ruleMultiplicity.current; }
+        EOF;
+
+// Rule Multiplicity
+ruleMultiplicity returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                {
+                        newCompositeNode(grammarAccess.getMultiplicityAccess().getUnboundedMultiplicityParserRuleCall_0());
+                }
+                this_UnboundedMultiplicity_0=ruleUnboundedMultiplicity
+                {
+                        $current = $this_UnboundedMultiplicity_0.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getMultiplicityAccess().getDefiniteMultiplicityParserRuleCall_1());
+                }
+                this_DefiniteMultiplicity_1=ruleDefiniteMultiplicity
+                {
+                        $current = $this_DefiniteMultiplicity_1.current;
+                        afterParserOrEnumRuleCall();
+                }
+        )
+;
+
+// Entry rule entryRuleDefiniteMultiplicity
+entryRuleDefiniteMultiplicity returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getDefiniteMultiplicityRule()); }
+        iv_ruleDefiniteMultiplicity=ruleDefiniteMultiplicity
+        { $current=$iv_ruleDefiniteMultiplicity.current; }
+        EOF;
+
+// Rule DefiniteMultiplicity
+ruleDefiniteMultiplicity returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                {
+                        newCompositeNode(grammarAccess.getDefiniteMultiplicityAccess().getRangeMultiplicityParserRuleCall_0());
+                }
+                this_RangeMultiplicity_0=ruleRangeMultiplicity
+                {
+                        $current = $this_RangeMultiplicity_0.current;
+                        afterParserOrEnumRuleCall();
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getDefiniteMultiplicityAccess().getExactMultiplicityParserRuleCall_1());
+                }
+                this_ExactMultiplicity_1=ruleExactMultiplicity
+                {
+                        $current = $this_ExactMultiplicity_1.current;
+                        afterParserOrEnumRuleCall();
+                }
+        )
+;
+
+// Entry rule entryRuleUnboundedMultiplicity
+entryRuleUnboundedMultiplicity returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getUnboundedMultiplicityRule()); }
+        iv_ruleUnboundedMultiplicity=ruleUnboundedMultiplicity
+        { $current=$iv_ruleUnboundedMultiplicity.current; }
+        EOF;
+
+// Rule UnboundedMultiplicity
+ruleUnboundedMultiplicity returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                {
+                        $current = forceCreateModelElement(
+                                grammarAccess.getUnboundedMultiplicityAccess().getUnboundedMultiplicityAction(),
+                                $current);
+                }
+        )
+;
+
+// Entry rule entryRuleRangeMultiplicity
+entryRuleRangeMultiplicity returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getRangeMultiplicityRule()); }
+        iv_ruleRangeMultiplicity=ruleRangeMultiplicity
+        { $current=$iv_ruleRangeMultiplicity.current; }
+        EOF;
+
+// Rule RangeMultiplicity
+ruleRangeMultiplicity returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        (
+                                lv_lowerBound_0_0=RULE_INT
+                                {
+                                        newLeafNode(lv_lowerBound_0_0, grammarAccess.getRangeMultiplicityAccess().getLowerBoundINTTerminalRuleCall_0_0());
+                                }
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElement(grammarAccess.getRangeMultiplicityRule());
+                                        }
+                                        setWithLastConsumed(
+                                                $current,
+                                                "lowerBound",
+                                                lv_lowerBound_0_0,
+                                                "org.eclipse.xtext.common.Terminals.INT");
+                                }
+                        )
+                )
+                otherlv_1='..'
+                {
+                        newLeafNode(otherlv_1, grammarAccess.getRangeMultiplicityAccess().getFullStopFullStopKeyword_1());
+                }
+                (
+                        (
+                                {
+                                        newCompositeNode(grammarAccess.getRangeMultiplicityAccess().getUpperBoundUpperBoundParserRuleCall_2_0());
+                                }
+                                lv_upperBound_2_0=ruleUpperBound
+                                {
+                                        if ($current==null) {
+                                                $current = createModelElementForParent(grammarAccess.getRangeMultiplicityRule());
+                                        }
+                                        set(
+                                                $current,
+                                                "upperBound",
+                                                lv_upperBound_2_0,
+                                                "org.eclipse.viatra.solver.language.Problem.UpperBound");
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )
+                )
+        )
+;
+
+// Entry rule entryRuleExactMultiplicity
+entryRuleExactMultiplicity returns [EObject current=null]:
+        { newCompositeNode(grammarAccess.getExactMultiplicityRule()); }
+        iv_ruleExactMultiplicity=ruleExactMultiplicity
+        { $current=$iv_ruleExactMultiplicity.current; }
+        EOF;
+
+// Rule ExactMultiplicity
+ruleExactMultiplicity returns [EObject current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        lv_exactValue_0_0=RULE_INT
+                        {
+                                newLeafNode(lv_exactValue_0_0, grammarAccess.getExactMultiplicityAccess().getExactValueINTTerminalRuleCall_0());
+                        }
+                        {
+                                if ($current==null) {
+                                        $current = createModelElement(grammarAccess.getExactMultiplicityRule());
+                                }
+                                setWithLastConsumed(
+                                        $current,
+                                        "exactValue",
+                                        lv_exactValue_0_0,
+                                        "org.eclipse.xtext.common.Terminals.INT");
+                        }
+                )
+        )
+;
+
+// Entry rule entryRuleUpperBound
+entryRuleUpperBound returns [String current=null]:
+        { newCompositeNode(grammarAccess.getUpperBoundRule()); }
+        iv_ruleUpperBound=ruleUpperBound
+        { $current=$iv_ruleUpperBound.current.getText(); }
+        EOF;
+
+// Rule UpperBound
+ruleUpperBound returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                this_INT_0=RULE_INT
+                {
+                        $current.merge(this_INT_0);
+                }
+                {
+                        newLeafNode(this_INT_0, grammarAccess.getUpperBoundAccess().getINTTerminalRuleCall_0());
+                }
+                    |
+                kw='*'
+                {
+                        $current.merge(kw);
+                        newLeafNode(kw, grammarAccess.getUpperBoundAccess().getAsteriskKeyword_1());
+                }
+        )
+;
+
+// Entry rule entryRuleQuotedOrUnquotedId
+entryRuleQuotedOrUnquotedId returns [String current=null]:
+        { newCompositeNode(grammarAccess.getQuotedOrUnquotedIdRule()); }
+        iv_ruleQuotedOrUnquotedId=ruleQuotedOrUnquotedId
+        { $current=$iv_ruleQuotedOrUnquotedId.current.getText(); }
+        EOF;
+
+// Rule QuotedOrUnquotedId
+ruleQuotedOrUnquotedId returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                this_QUOTED_ID_0=RULE_QUOTED_ID
+                {
+                        $current.merge(this_QUOTED_ID_0);
+                }
+                {
+                        newLeafNode(this_QUOTED_ID_0, grammarAccess.getQuotedOrUnquotedIdAccess().getQUOTED_IDTerminalRuleCall_0());
+                }
+                    |
+                {
+                        newCompositeNode(grammarAccess.getQuotedOrUnquotedIdAccess().getIdentifierParserRuleCall_1());
+                }
+                this_Identifier_1=ruleIdentifier
+                {
+                        $current.merge(this_Identifier_1);
+                }
+                {
+                        afterParserOrEnumRuleCall();
+                }
+        )
+;
+
+// Entry rule entryRuleQualifiedName
+entryRuleQualifiedName returns [String current=null]:
+        { newCompositeNode(grammarAccess.getQualifiedNameRule()); }
+        iv_ruleQualifiedName=ruleQualifiedName
+        { $current=$iv_ruleQualifiedName.current.getText(); }
+        EOF;
+
+// Rule QualifiedName
+ruleQualifiedName returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                this_QUOTED_ID_0=RULE_QUOTED_ID
+                {
+                        $current.merge(this_QUOTED_ID_0);
+                }
+                {
+                        newLeafNode(this_QUOTED_ID_0, grammarAccess.getQualifiedNameAccess().getQUOTED_IDTerminalRuleCall_0());
+                }
+                    |
+                (
+                        {
+                                newCompositeNode(grammarAccess.getQualifiedNameAccess().getIdentifierParserRuleCall_1_0());
+                        }
+                        this_Identifier_1=ruleIdentifier
+                        {
+                                $current.merge(this_Identifier_1);
+                        }
+                        {
+                                afterParserOrEnumRuleCall();
+                        }
+                        (
+                                kw=':'
+                                {
+                                        $current.merge(kw);
+                                        newLeafNode(kw, grammarAccess.getQualifiedNameAccess().getColonKeyword_1_1_0());
+                                }
+                                {
+                                        newCompositeNode(grammarAccess.getQualifiedNameAccess().getIdentifierParserRuleCall_1_1_1());
+                                }
+                                this_Identifier_3=ruleIdentifier
+                                {
+                                        $current.merge(this_Identifier_3);
+                                }
+                                {
+                                        afterParserOrEnumRuleCall();
+                                }
+                        )*
+                        (
+                                kw=':'
+                                {
+                                        $current.merge(kw);
+                                        newLeafNode(kw, grammarAccess.getQualifiedNameAccess().getColonKeyword_1_2_0());
+                                }
+                                this_QUOTED_ID_5=RULE_QUOTED_ID
+                                {
+                                        $current.merge(this_QUOTED_ID_5);
+                                }
+                                {
+                                        newLeafNode(this_QUOTED_ID_5, grammarAccess.getQualifiedNameAccess().getQUOTED_IDTerminalRuleCall_1_2_1());
+                                }
+                        )?
+                )
+        )
+;
+
+// Entry rule entryRuleIdentifier
+entryRuleIdentifier returns [String current=null]:
+        { newCompositeNode(grammarAccess.getIdentifierRule()); }
+        iv_ruleIdentifier=ruleIdentifier
+        { $current=$iv_ruleIdentifier.current.getText(); }
+        EOF;
+
+// Rule Identifier
+ruleIdentifier returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                this_ID_0=RULE_ID
+                {
+                        $current.merge(this_ID_0);
+                }
+                {
+                        newLeafNode(this_ID_0, grammarAccess.getIdentifierAccess().getIDTerminalRuleCall_0());
+                }
+                    |
+                kw='true'
+                {
+                        $current.merge(kw);
+                        newLeafNode(kw, grammarAccess.getIdentifierAccess().getTrueKeyword_1());
+                }
+                    |
+                kw='false'
+                {
+                        $current.merge(kw);
+                        newLeafNode(kw, grammarAccess.getIdentifierAccess().getFalseKeyword_2());
+                }
+        )
+;
+
+// Rule LogicValue
+ruleLogicValue returns [Enumerator current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        enumLiteral_0='true'
+                        {
+                                $current = grammarAccess.getLogicValueAccess().getTRUEEnumLiteralDeclaration_0().getEnumLiteral().getInstance();
+                                newLeafNode(enumLiteral_0, grammarAccess.getLogicValueAccess().getTRUEEnumLiteralDeclaration_0());
+                        }
+                )
+                    |
+                (
+                        enumLiteral_1='false'
+                        {
+                                $current = grammarAccess.getLogicValueAccess().getFALSEEnumLiteralDeclaration_1().getEnumLiteral().getInstance();
+                                newLeafNode(enumLiteral_1, grammarAccess.getLogicValueAccess().getFALSEEnumLiteralDeclaration_1());
+                        }
+                )
+                    |
+                (
+                        enumLiteral_2='unknown'
+                        {
+                                $current = grammarAccess.getLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_2().getEnumLiteral().getInstance();
+                                newLeafNode(enumLiteral_2, grammarAccess.getLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_2());
+                        }
+                )
+        )
+;
+
+// Rule ShortLogicValue
+ruleShortLogicValue returns [Enumerator current=null]
+@init {
+        enterRule();
+}
+@after {
+        leaveRule();
+}:
+        (
+                (
+                        enumLiteral_0='!'
+                        {
+                                $current = grammarAccess.getShortLogicValueAccess().getFALSEEnumLiteralDeclaration_0().getEnumLiteral().getInstance();
+                                newLeafNode(enumLiteral_0, grammarAccess.getShortLogicValueAccess().getFALSEEnumLiteralDeclaration_0());
+                        }
+                )
+                    |
+                (
+                        enumLiteral_1='?'
+                        {
+                                $current = grammarAccess.getShortLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_1().getEnumLiteral().getInstance();
+                                newLeafNode(enumLiteral_1, grammarAccess.getShortLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_1());
+                        }
+                )
+        )
+;
+
+RULE_STRING : '"' ('\\' .|~(('\\'|'"')))* '"';
+
+RULE_QUOTED_ID : '\'' ('\\' .|~(('\\'|'\'')))* '\'';
+
+RULE_ID : '^'? ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'_'|'0'..'9')*;
+
+RULE_INT : ('0'..'9')+;
+
+RULE_ML_COMMENT : '/*' ( options {greedy=false;} : . )*'*/';
+
+RULE_SL_COMMENT : '//' ~(('\n'|'\r'))* ('\r'? '\n')?;
+
+RULE_WS : (' '|'\t'|'\r'|'\n')+;
+
+RULE_ANY_OTHER : .;
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens
new file mode 100644
index 00000000..e968ac14
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblem.tokens
@@ -0,0 +1,72 @@
+'!'=32
+'('=29
+')'=30
+'*'=39
+'+'=33
+'+='=36
+','=17
+'.'=13
+'..'=38
+':'=34
+':-'=31
+';'=19
+'='=37
+'?'=43
+'['=24
+']'=25
+'abstract'=14
+'class'=15
+'contains'=22
+'enum'=21
+'error'=27
+'extends'=16
+'false'=41
+'opposite'=26
+'pred'=28
+'problem'=12
+'refers'=23
+'scope'=35
+'true'=40
+'unknown'=42
+'{'=18
+'}'=20
+RULE_ANY_OTHER=11
+RULE_ID=4
+RULE_INT=5
+RULE_ML_COMMENT=8
+RULE_QUOTED_ID=6
+RULE_SL_COMMENT=9
+RULE_STRING=7
+RULE_WS=10
+T__12=12
+T__13=13
+T__14=14
+T__15=15
+T__16=16
+T__17=17
+T__18=18
+T__19=19
+T__20=20
+T__21=21
+T__22=22
+T__23=23
+T__24=24
+T__25=25
+T__26=26
+T__27=27
+T__28=28
+T__29=29
+T__30=30
+T__31=31
+T__32=32
+T__33=33
+T__34=34
+T__35=35
+T__36=36
+T__37=37
+T__38=38
+T__39=39
+T__40=40
+T__41=41
+T__42=42
+T__43=43
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java
new file mode 100644
index 00000000..1fd1e166
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemLexer.java
@@ -0,0 +1,1797 @@
+package org.eclipse.viatra.solver.language.parser.antlr.internal;
+
+// Hack: Use our own Lexer superclass by means of import. 
+// Currently there is no other way to specify the superclass for the lexer.
+import org.eclipse.xtext.parser.antlr.Lexer;
+
+
+import org.antlr.runtime.*;
+import java.util.Stack;
+import java.util.List;
+import java.util.ArrayList;
+
+@SuppressWarnings("all")
+public class InternalProblemLexer extends Lexer {
+    public static final int T__19=19;
+    public static final int T__15=15;
+    public static final int T__16=16;
+    public static final int T__17=17;
+    public static final int T__18=18;
+    public static final int T__12=12;
+    public static final int T__13=13;
+    public static final int T__14=14;
+    public static final int RULE_ID=4;
+    public static final int RULE_QUOTED_ID=6;
+    public static final int T__26=26;
+    public static final int T__27=27;
+    public static final int T__28=28;
+    public static final int RULE_INT=5;
+    public static final int T__29=29;
+    public static final int T__22=22;
+    public static final int RULE_ML_COMMENT=8;
+    public static final int T__23=23;
+    public static final int T__24=24;
+    public static final int T__25=25;
+    public static final int T__20=20;
+    public static final int T__21=21;
+    public static final int RULE_STRING=7;
+    public static final int RULE_SL_COMMENT=9;
+    public static final int T__37=37;
+    public static final int T__38=38;
+    public static final int T__39=39;
+    public static final int T__33=33;
+    public static final int T__34=34;
+    public static final int T__35=35;
+    public static final int T__36=36;
+    public static final int EOF=-1;
+    public static final int T__30=30;
+    public static final int T__31=31;
+    public static final int T__32=32;
+    public static final int RULE_WS=10;
+    public static final int RULE_ANY_OTHER=11;
+    public static final int T__40=40;
+    public static final int T__41=41;
+    public static final int T__42=42;
+    public static final int T__43=43;
+
+    // delegates
+    // delegators
+
+    public InternalProblemLexer() {;} 
+    public InternalProblemLexer(CharStream input) {
+        this(input, new RecognizerSharedState());
+    }
+    public InternalProblemLexer(CharStream input, RecognizerSharedState state) {
+        super(input,state);
+
+    }
+    public String getGrammarFileName() { return "InternalProblem.g"; }
+
+    // $ANTLR start "T__12"
+    public final void mT__12() throws RecognitionException {
+        try {
+            int _type = T__12;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:11:7: ( 'problem' )
+            // InternalProblem.g:11:9: 'problem'
+            {
+            match("problem"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__12"
+
+    // $ANTLR start "T__13"
+    public final void mT__13() throws RecognitionException {
+        try {
+            int _type = T__13;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:12:7: ( '.' )
+            // InternalProblem.g:12:9: '.'
+            {
+            match('.'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__13"
+
+    // $ANTLR start "T__14"
+    public final void mT__14() throws RecognitionException {
+        try {
+            int _type = T__14;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:13:7: ( 'abstract' )
+            // InternalProblem.g:13:9: 'abstract'
+            {
+            match("abstract"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__14"
+
+    // $ANTLR start "T__15"
+    public final void mT__15() throws RecognitionException {
+        try {
+            int _type = T__15;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:14:7: ( 'class' )
+            // InternalProblem.g:14:9: 'class'
+            {
+            match("class"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__15"
+
+    // $ANTLR start "T__16"
+    public final void mT__16() throws RecognitionException {
+        try {
+            int _type = T__16;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:15:7: ( 'extends' )
+            // InternalProblem.g:15:9: 'extends'
+            {
+            match("extends"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__16"
+
+    // $ANTLR start "T__17"
+    public final void mT__17() throws RecognitionException {
+        try {
+            int _type = T__17;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:16:7: ( ',' )
+            // InternalProblem.g:16:9: ','
+            {
+            match(','); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__17"
+
+    // $ANTLR start "T__18"
+    public final void mT__18() throws RecognitionException {
+        try {
+            int _type = T__18;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:17:7: ( '{' )
+            // InternalProblem.g:17:9: '{'
+            {
+            match('{'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__18"
+
+    // $ANTLR start "T__19"
+    public final void mT__19() throws RecognitionException {
+        try {
+            int _type = T__19;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:18:7: ( ';' )
+            // InternalProblem.g:18:9: ';'
+            {
+            match(';'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__19"
+
+    // $ANTLR start "T__20"
+    public final void mT__20() throws RecognitionException {
+        try {
+            int _type = T__20;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:19:7: ( '}' )
+            // InternalProblem.g:19:9: '}'
+            {
+            match('}'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__20"
+
+    // $ANTLR start "T__21"
+    public final void mT__21() throws RecognitionException {
+        try {
+            int _type = T__21;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:20:7: ( 'enum' )
+            // InternalProblem.g:20:9: 'enum'
+            {
+            match("enum"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__21"
+
+    // $ANTLR start "T__22"
+    public final void mT__22() throws RecognitionException {
+        try {
+            int _type = T__22;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:21:7: ( 'contains' )
+            // InternalProblem.g:21:9: 'contains'
+            {
+            match("contains"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__22"
+
+    // $ANTLR start "T__23"
+    public final void mT__23() throws RecognitionException {
+        try {
+            int _type = T__23;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:22:7: ( 'refers' )
+            // InternalProblem.g:22:9: 'refers'
+            {
+            match("refers"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__23"
+
+    // $ANTLR start "T__24"
+    public final void mT__24() throws RecognitionException {
+        try {
+            int _type = T__24;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:23:7: ( '[' )
+            // InternalProblem.g:23:9: '['
+            {
+            match('['); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__24"
+
+    // $ANTLR start "T__25"
+    public final void mT__25() throws RecognitionException {
+        try {
+            int _type = T__25;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:24:7: ( ']' )
+            // InternalProblem.g:24:9: ']'
+            {
+            match(']'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__25"
+
+    // $ANTLR start "T__26"
+    public final void mT__26() throws RecognitionException {
+        try {
+            int _type = T__26;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:25:7: ( 'opposite' )
+            // InternalProblem.g:25:9: 'opposite'
+            {
+            match("opposite"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__26"
+
+    // $ANTLR start "T__27"
+    public final void mT__27() throws RecognitionException {
+        try {
+            int _type = T__27;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:26:7: ( 'error' )
+            // InternalProblem.g:26:9: 'error'
+            {
+            match("error"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__27"
+
+    // $ANTLR start "T__28"
+    public final void mT__28() throws RecognitionException {
+        try {
+            int _type = T__28;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:27:7: ( 'pred' )
+            // InternalProblem.g:27:9: 'pred'
+            {
+            match("pred"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__28"
+
+    // $ANTLR start "T__29"
+    public final void mT__29() throws RecognitionException {
+        try {
+            int _type = T__29;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:28:7: ( '(' )
+            // InternalProblem.g:28:9: '('
+            {
+            match('('); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__29"
+
+    // $ANTLR start "T__30"
+    public final void mT__30() throws RecognitionException {
+        try {
+            int _type = T__30;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:29:7: ( ')' )
+            // InternalProblem.g:29:9: ')'
+            {
+            match(')'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__30"
+
+    // $ANTLR start "T__31"
+    public final void mT__31() throws RecognitionException {
+        try {
+            int _type = T__31;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:30:7: ( ':-' )
+            // InternalProblem.g:30:9: ':-'
+            {
+            match(":-"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__31"
+
+    // $ANTLR start "T__32"
+    public final void mT__32() throws RecognitionException {
+        try {
+            int _type = T__32;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:31:7: ( '!' )
+            // InternalProblem.g:31:9: '!'
+            {
+            match('!'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__32"
+
+    // $ANTLR start "T__33"
+    public final void mT__33() throws RecognitionException {
+        try {
+            int _type = T__33;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:32:7: ( '+' )
+            // InternalProblem.g:32:9: '+'
+            {
+            match('+'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__33"
+
+    // $ANTLR start "T__34"
+    public final void mT__34() throws RecognitionException {
+        try {
+            int _type = T__34;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:33:7: ( ':' )
+            // InternalProblem.g:33:9: ':'
+            {
+            match(':'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__34"
+
+    // $ANTLR start "T__35"
+    public final void mT__35() throws RecognitionException {
+        try {
+            int _type = T__35;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:34:7: ( 'scope' )
+            // InternalProblem.g:34:9: 'scope'
+            {
+            match("scope"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__35"
+
+    // $ANTLR start "T__36"
+    public final void mT__36() throws RecognitionException {
+        try {
+            int _type = T__36;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:35:7: ( '+=' )
+            // InternalProblem.g:35:9: '+='
+            {
+            match("+="); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__36"
+
+    // $ANTLR start "T__37"
+    public final void mT__37() throws RecognitionException {
+        try {
+            int _type = T__37;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:36:7: ( '=' )
+            // InternalProblem.g:36:9: '='
+            {
+            match('='); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__37"
+
+    // $ANTLR start "T__38"
+    public final void mT__38() throws RecognitionException {
+        try {
+            int _type = T__38;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:37:7: ( '..' )
+            // InternalProblem.g:37:9: '..'
+            {
+            match(".."); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__38"
+
+    // $ANTLR start "T__39"
+    public final void mT__39() throws RecognitionException {
+        try {
+            int _type = T__39;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:38:7: ( '*' )
+            // InternalProblem.g:38:9: '*'
+            {
+            match('*'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__39"
+
+    // $ANTLR start "T__40"
+    public final void mT__40() throws RecognitionException {
+        try {
+            int _type = T__40;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:39:7: ( 'true' )
+            // InternalProblem.g:39:9: 'true'
+            {
+            match("true"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__40"
+
+    // $ANTLR start "T__41"
+    public final void mT__41() throws RecognitionException {
+        try {
+            int _type = T__41;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:40:7: ( 'false' )
+            // InternalProblem.g:40:9: 'false'
+            {
+            match("false"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__41"
+
+    // $ANTLR start "T__42"
+    public final void mT__42() throws RecognitionException {
+        try {
+            int _type = T__42;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:41:7: ( 'unknown' )
+            // InternalProblem.g:41:9: 'unknown'
+            {
+            match("unknown"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__42"
+
+    // $ANTLR start "T__43"
+    public final void mT__43() throws RecognitionException {
+        try {
+            int _type = T__43;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:42:7: ( '?' )
+            // InternalProblem.g:42:9: '?'
+            {
+            match('?'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "T__43"
+
+    // $ANTLR start "RULE_STRING"
+    public final void mRULE_STRING() throws RecognitionException {
+        try {
+            int _type = RULE_STRING;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1895:13: ( '\"' ( '\\\\' . | ~ ( ( '\\\\' | '\"' ) ) )* '\"' )
+            // InternalProblem.g:1895:15: '\"' ( '\\\\' . | ~ ( ( '\\\\' | '\"' ) ) )* '\"'
+            {
+            match('\"'); 
+            // InternalProblem.g:1895:19: ( '\\\\' . | ~ ( ( '\\\\' | '\"' ) ) )*
+            loop1:
+            do {
+                int alt1=3;
+                int LA1_0 = input.LA(1);
+
+                if ( (LA1_0=='\\') ) {
+                    alt1=1;
+                }
+                else if ( ((LA1_0>='\u0000' && LA1_0<='!')||(LA1_0>='#' && LA1_0<='[')||(LA1_0>=']' && LA1_0<='\uFFFF')) ) {
+                    alt1=2;
+                }
+
+
+                switch (alt1) {
+                case 1 :
+                    // InternalProblem.g:1895:20: '\\\\' .
+                    {
+                    match('\\'); 
+                    matchAny(); 
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1895:27: ~ ( ( '\\\\' | '\"' ) )
+                    {
+                    if ( (input.LA(1)>='\u0000' && input.LA(1)<='!')||(input.LA(1)>='#' && input.LA(1)<='[')||(input.LA(1)>=']' && input.LA(1)<='\uFFFF') ) {
+                        input.consume();
+
+                    }
+                    else {
+                        MismatchedSetException mse = new MismatchedSetException(null,input);
+                        recover(mse);
+                        throw mse;}
+
+
+                    }
+                    break;
+
+                default :
+                    break loop1;
+                }
+            } while (true);
+
+            match('\"'); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_STRING"
+
+    // $ANTLR start "RULE_QUOTED_ID"
+    public final void mRULE_QUOTED_ID() throws RecognitionException {
+        try {
+            int _type = RULE_QUOTED_ID;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1897:16: ( '\\'' ( '\\\\' . | ~ ( ( '\\\\' | '\\'' ) ) )* '\\'' )
+            // InternalProblem.g:1897:18: '\\'' ( '\\\\' . | ~ ( ( '\\\\' | '\\'' ) ) )* '\\''
+            {
+            match('\''); 
+            // InternalProblem.g:1897:23: ( '\\\\' . | ~ ( ( '\\\\' | '\\'' ) ) )*
+            loop2:
+            do {
+                int alt2=3;
+                int LA2_0 = input.LA(1);
+
+                if ( (LA2_0=='\\') ) {
+                    alt2=1;
+                }
+                else if ( ((LA2_0>='\u0000' && LA2_0<='&')||(LA2_0>='(' && LA2_0<='[')||(LA2_0>=']' && LA2_0<='\uFFFF')) ) {
+                    alt2=2;
+                }
+
+
+                switch (alt2) {
+                case 1 :
+                    // InternalProblem.g:1897:24: '\\\\' .
+                    {
+                    match('\\'); 
+                    matchAny(); 
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1897:31: ~ ( ( '\\\\' | '\\'' ) )
+                    {
+                    if ( (input.LA(1)>='\u0000' && input.LA(1)<='&')||(input.LA(1)>='(' && input.LA(1)<='[')||(input.LA(1)>=']' && input.LA(1)<='\uFFFF') ) {
+                        input.consume();
+
+                    }
+                    else {
+                        MismatchedSetException mse = new MismatchedSetException(null,input);
+                        recover(mse);
+                        throw mse;}
+
+
+                    }
+                    break;
+
+                default :
+                    break loop2;
+                }
+            } while (true);
+
+            match('\''); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_QUOTED_ID"
+
+    // $ANTLR start "RULE_ID"
+    public final void mRULE_ID() throws RecognitionException {
+        try {
+            int _type = RULE_ID;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1899:9: ( ( '^' )? ( 'a' .. 'z' | 'A' .. 'Z' | '_' ) ( 'a' .. 'z' | 'A' .. 'Z' | '_' | '0' .. '9' )* )
+            // InternalProblem.g:1899:11: ( '^' )? ( 'a' .. 'z' | 'A' .. 'Z' | '_' ) ( 'a' .. 'z' | 'A' .. 'Z' | '_' | '0' .. '9' )*
+            {
+            // InternalProblem.g:1899:11: ( '^' )?
+            int alt3=2;
+            int LA3_0 = input.LA(1);
+
+            if ( (LA3_0=='^') ) {
+                alt3=1;
+            }
+            switch (alt3) {
+                case 1 :
+                    // InternalProblem.g:1899:11: '^'
+                    {
+                    match('^'); 
+
+                    }
+                    break;
+
+            }
+
+            if ( (input.LA(1)>='A' && input.LA(1)<='Z')||input.LA(1)=='_'||(input.LA(1)>='a' && input.LA(1)<='z') ) {
+                input.consume();
+
+            }
+            else {
+                MismatchedSetException mse = new MismatchedSetException(null,input);
+                recover(mse);
+                throw mse;}
+
+            // InternalProblem.g:1899:40: ( 'a' .. 'z' | 'A' .. 'Z' | '_' | '0' .. '9' )*
+            loop4:
+            do {
+                int alt4=2;
+                int LA4_0 = input.LA(1);
+
+                if ( ((LA4_0>='0' && LA4_0<='9')||(LA4_0>='A' && LA4_0<='Z')||LA4_0=='_'||(LA4_0>='a' && LA4_0<='z')) ) {
+                    alt4=1;
+                }
+
+
+                switch (alt4) {
+                case 1 :
+                    // InternalProblem.g:
+                    {
+                    if ( (input.LA(1)>='0' && input.LA(1)<='9')||(input.LA(1)>='A' && input.LA(1)<='Z')||input.LA(1)=='_'||(input.LA(1)>='a' && input.LA(1)<='z') ) {
+                        input.consume();
+
+                    }
+                    else {
+                        MismatchedSetException mse = new MismatchedSetException(null,input);
+                        recover(mse);
+                        throw mse;}
+
+
+                    }
+                    break;
+
+                default :
+                    break loop4;
+                }
+            } while (true);
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_ID"
+
+    // $ANTLR start "RULE_INT"
+    public final void mRULE_INT() throws RecognitionException {
+        try {
+            int _type = RULE_INT;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1901:10: ( ( '0' .. '9' )+ )
+            // InternalProblem.g:1901:12: ( '0' .. '9' )+
+            {
+            // InternalProblem.g:1901:12: ( '0' .. '9' )+
+            int cnt5=0;
+            loop5:
+            do {
+                int alt5=2;
+                int LA5_0 = input.LA(1);
+
+                if ( ((LA5_0>='0' && LA5_0<='9')) ) {
+                    alt5=1;
+                }
+
+
+                switch (alt5) {
+                case 1 :
+                    // InternalProblem.g:1901:13: '0' .. '9'
+                    {
+                    matchRange('0','9'); 
+
+                    }
+                    break;
+
+                default :
+                    if ( cnt5 >= 1 ) break loop5;
+                        EarlyExitException eee =
+                            new EarlyExitException(5, input);
+                        throw eee;
+                }
+                cnt5++;
+            } while (true);
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_INT"
+
+    // $ANTLR start "RULE_ML_COMMENT"
+    public final void mRULE_ML_COMMENT() throws RecognitionException {
+        try {
+            int _type = RULE_ML_COMMENT;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1903:17: ( '/*' ( options {greedy=false; } : . )* '*/' )
+            // InternalProblem.g:1903:19: '/*' ( options {greedy=false; } : . )* '*/'
+            {
+            match("/*"); 
+
+            // InternalProblem.g:1903:24: ( options {greedy=false; } : . )*
+            loop6:
+            do {
+                int alt6=2;
+                int LA6_0 = input.LA(1);
+
+                if ( (LA6_0=='*') ) {
+                    int LA6_1 = input.LA(2);
+
+                    if ( (LA6_1=='/') ) {
+                        alt6=2;
+                    }
+                    else if ( ((LA6_1>='\u0000' && LA6_1<='.')||(LA6_1>='0' && LA6_1<='\uFFFF')) ) {
+                        alt6=1;
+                    }
+
+
+                }
+                else if ( ((LA6_0>='\u0000' && LA6_0<=')')||(LA6_0>='+' && LA6_0<='\uFFFF')) ) {
+                    alt6=1;
+                }
+
+
+                switch (alt6) {
+                case 1 :
+                    // InternalProblem.g:1903:52: .
+                    {
+                    matchAny(); 
+
+                    }
+                    break;
+
+                default :
+                    break loop6;
+                }
+            } while (true);
+
+            match("*/"); 
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_ML_COMMENT"
+
+    // $ANTLR start "RULE_SL_COMMENT"
+    public final void mRULE_SL_COMMENT() throws RecognitionException {
+        try {
+            int _type = RULE_SL_COMMENT;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1905:17: ( '//' (~ ( ( '\\n' | '\\r' ) ) )* ( ( '\\r' )? '\\n' )? )
+            // InternalProblem.g:1905:19: '//' (~ ( ( '\\n' | '\\r' ) ) )* ( ( '\\r' )? '\\n' )?
+            {
+            match("//"); 
+
+            // InternalProblem.g:1905:24: (~ ( ( '\\n' | '\\r' ) ) )*
+            loop7:
+            do {
+                int alt7=2;
+                int LA7_0 = input.LA(1);
+
+                if ( ((LA7_0>='\u0000' && LA7_0<='\t')||(LA7_0>='\u000B' && LA7_0<='\f')||(LA7_0>='\u000E' && LA7_0<='\uFFFF')) ) {
+                    alt7=1;
+                }
+
+
+                switch (alt7) {
+                case 1 :
+                    // InternalProblem.g:1905:24: ~ ( ( '\\n' | '\\r' ) )
+                    {
+                    if ( (input.LA(1)>='\u0000' && input.LA(1)<='\t')||(input.LA(1)>='\u000B' && input.LA(1)<='\f')||(input.LA(1)>='\u000E' && input.LA(1)<='\uFFFF') ) {
+                        input.consume();
+
+                    }
+                    else {
+                        MismatchedSetException mse = new MismatchedSetException(null,input);
+                        recover(mse);
+                        throw mse;}
+
+
+                    }
+                    break;
+
+                default :
+                    break loop7;
+                }
+            } while (true);
+
+            // InternalProblem.g:1905:40: ( ( '\\r' )? '\\n' )?
+            int alt9=2;
+            int LA9_0 = input.LA(1);
+
+            if ( (LA9_0=='\n'||LA9_0=='\r') ) {
+                alt9=1;
+            }
+            switch (alt9) {
+                case 1 :
+                    // InternalProblem.g:1905:41: ( '\\r' )? '\\n'
+                    {
+                    // InternalProblem.g:1905:41: ( '\\r' )?
+                    int alt8=2;
+                    int LA8_0 = input.LA(1);
+
+                    if ( (LA8_0=='\r') ) {
+                        alt8=1;
+                    }
+                    switch (alt8) {
+                        case 1 :
+                            // InternalProblem.g:1905:41: '\\r'
+                            {
+                            match('\r'); 
+
+                            }
+                            break;
+
+                    }
+
+                    match('\n'); 
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_SL_COMMENT"
+
+    // $ANTLR start "RULE_WS"
+    public final void mRULE_WS() throws RecognitionException {
+        try {
+            int _type = RULE_WS;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1907:9: ( ( ' ' | '\\t' | '\\r' | '\\n' )+ )
+            // InternalProblem.g:1907:11: ( ' ' | '\\t' | '\\r' | '\\n' )+
+            {
+            // InternalProblem.g:1907:11: ( ' ' | '\\t' | '\\r' | '\\n' )+
+            int cnt10=0;
+            loop10:
+            do {
+                int alt10=2;
+                int LA10_0 = input.LA(1);
+
+                if ( ((LA10_0>='\t' && LA10_0<='\n')||LA10_0=='\r'||LA10_0==' ') ) {
+                    alt10=1;
+                }
+
+
+                switch (alt10) {
+                case 1 :
+                    // InternalProblem.g:
+                    {
+                    if ( (input.LA(1)>='\t' && input.LA(1)<='\n')||input.LA(1)=='\r'||input.LA(1)==' ' ) {
+                        input.consume();
+
+                    }
+                    else {
+                        MismatchedSetException mse = new MismatchedSetException(null,input);
+                        recover(mse);
+                        throw mse;}
+
+
+                    }
+                    break;
+
+                default :
+                    if ( cnt10 >= 1 ) break loop10;
+                        EarlyExitException eee =
+                            new EarlyExitException(10, input);
+                        throw eee;
+                }
+                cnt10++;
+            } while (true);
+
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_WS"
+
+    // $ANTLR start "RULE_ANY_OTHER"
+    public final void mRULE_ANY_OTHER() throws RecognitionException {
+        try {
+            int _type = RULE_ANY_OTHER;
+            int _channel = DEFAULT_TOKEN_CHANNEL;
+            // InternalProblem.g:1909:16: ( . )
+            // InternalProblem.g:1909:18: .
+            {
+            matchAny(); 
+
+            }
+
+            state.type = _type;
+            state.channel = _channel;
+        }
+        finally {
+        }
+    }
+    // $ANTLR end "RULE_ANY_OTHER"
+
+    public void mTokens() throws RecognitionException {
+        // InternalProblem.g:1:8: ( T__12 | T__13 | T__14 | T__15 | T__16 | T__17 | T__18 | T__19 | T__20 | T__21 | T__22 | T__23 | T__24 | T__25 | T__26 | T__27 | T__28 | T__29 | T__30 | T__31 | T__32 | T__33 | T__34 | T__35 | T__36 | T__37 | T__38 | T__39 | T__40 | T__41 | T__42 | T__43 | RULE_STRING | RULE_QUOTED_ID | RULE_ID | RULE_INT | RULE_ML_COMMENT | RULE_SL_COMMENT | RULE_WS | RULE_ANY_OTHER )
+        int alt11=40;
+        alt11 = dfa11.predict(input);
+        switch (alt11) {
+            case 1 :
+                // InternalProblem.g:1:10: T__12
+                {
+                mT__12(); 
+
+                }
+                break;
+            case 2 :
+                // InternalProblem.g:1:16: T__13
+                {
+                mT__13(); 
+
+                }
+                break;
+            case 3 :
+                // InternalProblem.g:1:22: T__14
+                {
+                mT__14(); 
+
+                }
+                break;
+            case 4 :
+                // InternalProblem.g:1:28: T__15
+                {
+                mT__15(); 
+
+                }
+                break;
+            case 5 :
+                // InternalProblem.g:1:34: T__16
+                {
+                mT__16(); 
+
+                }
+                break;
+            case 6 :
+                // InternalProblem.g:1:40: T__17
+                {
+                mT__17(); 
+
+                }
+                break;
+            case 7 :
+                // InternalProblem.g:1:46: T__18
+                {
+                mT__18(); 
+
+                }
+                break;
+            case 8 :
+                // InternalProblem.g:1:52: T__19
+                {
+                mT__19(); 
+
+                }
+                break;
+            case 9 :
+                // InternalProblem.g:1:58: T__20
+                {
+                mT__20(); 
+
+                }
+                break;
+            case 10 :
+                // InternalProblem.g:1:64: T__21
+                {
+                mT__21(); 
+
+                }
+                break;
+            case 11 :
+                // InternalProblem.g:1:70: T__22
+                {
+                mT__22(); 
+
+                }
+                break;
+            case 12 :
+                // InternalProblem.g:1:76: T__23
+                {
+                mT__23(); 
+
+                }
+                break;
+            case 13 :
+                // InternalProblem.g:1:82: T__24
+                {
+                mT__24(); 
+
+                }
+                break;
+            case 14 :
+                // InternalProblem.g:1:88: T__25
+                {
+                mT__25(); 
+
+                }
+                break;
+            case 15 :
+                // InternalProblem.g:1:94: T__26
+                {
+                mT__26(); 
+
+                }
+                break;
+            case 16 :
+                // InternalProblem.g:1:100: T__27
+                {
+                mT__27(); 
+
+                }
+                break;
+            case 17 :
+                // InternalProblem.g:1:106: T__28
+                {
+                mT__28(); 
+
+                }
+                break;
+            case 18 :
+                // InternalProblem.g:1:112: T__29
+                {
+                mT__29(); 
+
+                }
+                break;
+            case 19 :
+                // InternalProblem.g:1:118: T__30
+                {
+                mT__30(); 
+
+                }
+                break;
+            case 20 :
+                // InternalProblem.g:1:124: T__31
+                {
+                mT__31(); 
+
+                }
+                break;
+            case 21 :
+                // InternalProblem.g:1:130: T__32
+                {
+                mT__32(); 
+
+                }
+                break;
+            case 22 :
+                // InternalProblem.g:1:136: T__33
+                {
+                mT__33(); 
+
+                }
+                break;
+            case 23 :
+                // InternalProblem.g:1:142: T__34
+                {
+                mT__34(); 
+
+                }
+                break;
+            case 24 :
+                // InternalProblem.g:1:148: T__35
+                {
+                mT__35(); 
+
+                }
+                break;
+            case 25 :
+                // InternalProblem.g:1:154: T__36
+                {
+                mT__36(); 
+
+                }
+                break;
+            case 26 :
+                // InternalProblem.g:1:160: T__37
+                {
+                mT__37(); 
+
+                }
+                break;
+            case 27 :
+                // InternalProblem.g:1:166: T__38
+                {
+                mT__38(); 
+
+                }
+                break;
+            case 28 :
+                // InternalProblem.g:1:172: T__39
+                {
+                mT__39(); 
+
+                }
+                break;
+            case 29 :
+                // InternalProblem.g:1:178: T__40
+                {
+                mT__40(); 
+
+                }
+                break;
+            case 30 :
+                // InternalProblem.g:1:184: T__41
+                {
+                mT__41(); 
+
+                }
+                break;
+            case 31 :
+                // InternalProblem.g:1:190: T__42
+                {
+                mT__42(); 
+
+                }
+                break;
+            case 32 :
+                // InternalProblem.g:1:196: T__43
+                {
+                mT__43(); 
+
+                }
+                break;
+            case 33 :
+                // InternalProblem.g:1:202: RULE_STRING
+                {
+                mRULE_STRING(); 
+
+                }
+                break;
+            case 34 :
+                // InternalProblem.g:1:214: RULE_QUOTED_ID
+                {
+                mRULE_QUOTED_ID(); 
+
+                }
+                break;
+            case 35 :
+                // InternalProblem.g:1:229: RULE_ID
+                {
+                mRULE_ID(); 
+
+                }
+                break;
+            case 36 :
+                // InternalProblem.g:1:237: RULE_INT
+                {
+                mRULE_INT(); 
+
+                }
+                break;
+            case 37 :
+                // InternalProblem.g:1:246: RULE_ML_COMMENT
+                {
+                mRULE_ML_COMMENT(); 
+
+                }
+                break;
+            case 38 :
+                // InternalProblem.g:1:262: RULE_SL_COMMENT
+                {
+                mRULE_SL_COMMENT(); 
+
+                }
+                break;
+            case 39 :
+                // InternalProblem.g:1:278: RULE_WS
+                {
+                mRULE_WS(); 
+
+                }
+                break;
+            case 40 :
+                // InternalProblem.g:1:286: RULE_ANY_OTHER
+                {
+                mRULE_ANY_OTHER(); 
+
+                }
+                break;
+
+        }
+
+    }
+
+
+    protected DFA11 dfa11 = new DFA11(this);
+    static final String DFA11_eotS =
+        "\1\uffff\1\43\1\45\3\43\4\uffff\1\43\2\uffff\1\43\2\uffff\1\67\1\uffff\1\72\1\43\2\uffff\3\43\1\uffff\3\41\2\uffff\1\41\2\uffff\1\43\3\uffff\6\43\4\uffff\1\43\2\uffff\1\43\7\uffff\1\43\2\uffff\3\43\7\uffff\17\43\1\145\4\43\1\152\4\43\1\157\3\43\1\uffff\1\43\1\164\2\43\1\uffff\1\167\2\43\1\172\1\uffff\1\173\3\43\1\uffff\2\43\1\uffff\1\u0081\1\43\2\uffff\1\43\1\u0084\2\43\1\u0087\1\uffff\1\43\1\u0089\1\uffff\1\u008a\1\u008b\1\uffff\1\u008c\4\uffff";
+    static final String DFA11_eofS =
+        "\u008d\uffff";
+    static final String DFA11_minS =
+        "\1\0\1\162\1\56\1\142\1\154\1\156\4\uffff\1\145\2\uffff\1\160\2\uffff\1\55\1\uffff\1\75\1\143\2\uffff\1\162\1\141\1\156\1\uffff\2\0\1\101\2\uffff\1\52\2\uffff\1\145\3\uffff\1\163\1\141\1\156\1\164\1\165\1\162\4\uffff\1\146\2\uffff\1\160\7\uffff\1\157\2\uffff\1\165\1\154\1\153\7\uffff\1\142\1\144\1\164\1\163\1\164\1\145\1\155\1\157\1\145\1\157\1\160\1\145\1\163\1\156\1\154\1\60\1\162\1\163\1\141\1\156\1\60\2\162\1\163\1\145\1\60\1\145\1\157\1\145\1\uffff\1\141\1\60\1\151\1\144\1\uffff\1\60\1\163\1\151\1\60\1\uffff\1\60\1\167\1\155\1\143\1\uffff\1\156\1\163\1\uffff\1\60\1\164\2\uffff\1\156\1\60\1\164\1\163\1\60\1\uffff\1\145\1\60\1\uffff\2\60\1\uffff\1\60\4\uffff";
+    static final String DFA11_maxS =
+        "\1\uffff\1\162\1\56\1\142\1\157\1\170\4\uffff\1\145\2\uffff\1\160\2\uffff\1\55\1\uffff\1\75\1\143\2\uffff\1\162\1\141\1\156\1\uffff\2\uffff\1\172\2\uffff\1\57\2\uffff\1\157\3\uffff\1\163\1\141\1\156\1\164\1\165\1\162\4\uffff\1\146\2\uffff\1\160\7\uffff\1\157\2\uffff\1\165\1\154\1\153\7\uffff\1\142\1\144\1\164\1\163\1\164\1\145\1\155\1\157\1\145\1\157\1\160\1\145\1\163\1\156\1\154\1\172\1\162\1\163\1\141\1\156\1\172\2\162\1\163\1\145\1\172\1\145\1\157\1\145\1\uffff\1\141\1\172\1\151\1\144\1\uffff\1\172\1\163\1\151\1\172\1\uffff\1\172\1\167\1\155\1\143\1\uffff\1\156\1\163\1\uffff\1\172\1\164\2\uffff\1\156\1\172\1\164\1\163\1\172\1\uffff\1\145\1\172\1\uffff\2\172\1\uffff\1\172\4\uffff";
+    static final String DFA11_acceptS =
+        "\6\uffff\1\6\1\7\1\10\1\11\1\uffff\1\15\1\16\1\uffff\1\22\1\23\1\uffff\1\25\2\uffff\1\32\1\34\3\uffff\1\40\3\uffff\1\43\1\44\1\uffff\1\47\1\50\1\uffff\1\43\1\33\1\2\6\uffff\1\6\1\7\1\10\1\11\1\uffff\1\15\1\16\1\uffff\1\22\1\23\1\24\1\27\1\25\1\31\1\26\1\uffff\1\32\1\34\3\uffff\1\40\1\41\1\42\1\44\1\45\1\46\1\47\35\uffff\1\21\4\uffff\1\12\4\uffff\1\35\4\uffff\1\4\2\uffff\1\20\2\uffff\1\30\1\36\5\uffff\1\14\2\uffff\1\1\2\uffff\1\5\1\uffff\1\37\1\3\1\13\1\17";
+    static final String DFA11_specialS =
+        "\1\2\31\uffff\1\1\1\0\161\uffff}>";
+    static final String[] DFA11_transitionS = {
+            "\11\41\2\40\2\41\1\40\22\41\1\40\1\21\1\32\4\41\1\33\1\16\1\17\1\25\1\22\1\6\1\41\1\2\1\37\12\36\1\20\1\10\1\41\1\24\1\41\1\31\1\41\32\35\1\13\1\41\1\14\1\34\1\35\1\41\1\3\1\35\1\4\1\35\1\5\1\27\10\35\1\15\1\1\1\35\1\12\1\23\1\26\1\30\5\35\1\7\1\41\1\11\uff82\41",
+            "\1\42",
+            "\1\44",
+            "\1\46",
+            "\1\47\2\uffff\1\50",
+            "\1\52\3\uffff\1\53\5\uffff\1\51",
+            "",
+            "",
+            "",
+            "",
+            "\1\60",
+            "",
+            "",
+            "\1\63",
+            "",
+            "",
+            "\1\66",
+            "",
+            "\1\71",
+            "\1\73",
+            "",
+            "",
+            "\1\76",
+            "\1\77",
+            "\1\100",
+            "",
+            "\0\102",
+            "\0\103",
+            "\32\43\4\uffff\1\43\1\uffff\32\43",
+            "",
+            "",
+            "\1\105\4\uffff\1\106",
+            "",
+            "",
+            "\1\111\11\uffff\1\110",
+            "",
+            "",
+            "",
+            "\1\112",
+            "\1\113",
+            "\1\114",
+            "\1\115",
+            "\1\116",
+            "\1\117",
+            "",
+            "",
+            "",
+            "",
+            "\1\120",
+            "",
+            "",
+            "\1\121",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "\1\122",
+            "",
+            "",
+            "\1\123",
+            "\1\124",
+            "\1\125",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "",
+            "\1\126",
+            "\1\127",
+            "\1\130",
+            "\1\131",
+            "\1\132",
+            "\1\133",
+            "\1\134",
+            "\1\135",
+            "\1\136",
+            "\1\137",
+            "\1\140",
+            "\1\141",
+            "\1\142",
+            "\1\143",
+            "\1\144",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\146",
+            "\1\147",
+            "\1\150",
+            "\1\151",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\153",
+            "\1\154",
+            "\1\155",
+            "\1\156",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\160",
+            "\1\161",
+            "\1\162",
+            "",
+            "\1\163",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\165",
+            "\1\166",
+            "",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\170",
+            "\1\171",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\174",
+            "\1\175",
+            "\1\176",
+            "",
+            "\1\177",
+            "\1\u0080",
+            "",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\u0082",
+            "",
+            "",
+            "\1\u0083",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\1\u0085",
+            "\1\u0086",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "",
+            "\1\u0088",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "",
+            "\12\43\7\uffff\32\43\4\uffff\1\43\1\uffff\32\43",
+            "",
+            "",
+            "",
+            ""
+    };
+
+    static final short[] DFA11_eot = DFA.unpackEncodedString(DFA11_eotS);
+    static final short[] DFA11_eof = DFA.unpackEncodedString(DFA11_eofS);
+    static final char[] DFA11_min = DFA.unpackEncodedStringToUnsignedChars(DFA11_minS);
+    static final char[] DFA11_max = DFA.unpackEncodedStringToUnsignedChars(DFA11_maxS);
+    static final short[] DFA11_accept = DFA.unpackEncodedString(DFA11_acceptS);
+    static final short[] DFA11_special = DFA.unpackEncodedString(DFA11_specialS);
+    static final short[][] DFA11_transition;
+
+    static {
+        int numStates = DFA11_transitionS.length;
+        DFA11_transition = new short[numStates][];
+        for (int i=0; i<numStates; i++) {
+            DFA11_transition[i] = DFA.unpackEncodedString(DFA11_transitionS[i]);
+        }
+    }
+
+    class DFA11 extends DFA {
+
+        public DFA11(BaseRecognizer recognizer) {
+            this.recognizer = recognizer;
+            this.decisionNumber = 11;
+            this.eot = DFA11_eot;
+            this.eof = DFA11_eof;
+            this.min = DFA11_min;
+            this.max = DFA11_max;
+            this.accept = DFA11_accept;
+            this.special = DFA11_special;
+            this.transition = DFA11_transition;
+        }
+        public String getDescription() {
+            return "1:1: Tokens : ( T__12 | T__13 | T__14 | T__15 | T__16 | T__17 | T__18 | T__19 | T__20 | T__21 | T__22 | T__23 | T__24 | T__25 | T__26 | T__27 | T__28 | T__29 | T__30 | T__31 | T__32 | T__33 | T__34 | T__35 | T__36 | T__37 | T__38 | T__39 | T__40 | T__41 | T__42 | T__43 | RULE_STRING | RULE_QUOTED_ID | RULE_ID | RULE_INT | RULE_ML_COMMENT | RULE_SL_COMMENT | RULE_WS | RULE_ANY_OTHER );";
+        }
+        public int specialStateTransition(int s, IntStream _input) throws NoViableAltException {
+            IntStream input = _input;
+                int _s = s;
+            switch ( s ) {
+                    case 0 : 
+                        int LA11_27 = input.LA(1);
+
+                        s = -1;
+                        if ( ((LA11_27>='\u0000' && LA11_27<='\uFFFF')) ) {s = 67;}
+
+                        else s = 33;
+
+                        if ( s>=0 ) return s;
+                        break;
+                    case 1 : 
+                        int LA11_26 = input.LA(1);
+
+                        s = -1;
+                        if ( ((LA11_26>='\u0000' && LA11_26<='\uFFFF')) ) {s = 66;}
+
+                        else s = 33;
+
+                        if ( s>=0 ) return s;
+                        break;
+                    case 2 : 
+                        int LA11_0 = input.LA(1);
+
+                        s = -1;
+                        if ( (LA11_0=='p') ) {s = 1;}
+
+                        else if ( (LA11_0=='.') ) {s = 2;}
+
+                        else if ( (LA11_0=='a') ) {s = 3;}
+
+                        else if ( (LA11_0=='c') ) {s = 4;}
+
+                        else if ( (LA11_0=='e') ) {s = 5;}
+
+                        else if ( (LA11_0==',') ) {s = 6;}
+
+                        else if ( (LA11_0=='{') ) {s = 7;}
+
+                        else if ( (LA11_0==';') ) {s = 8;}
+
+                        else if ( (LA11_0=='}') ) {s = 9;}
+
+                        else if ( (LA11_0=='r') ) {s = 10;}
+
+                        else if ( (LA11_0=='[') ) {s = 11;}
+
+                        else if ( (LA11_0==']') ) {s = 12;}
+
+                        else if ( (LA11_0=='o') ) {s = 13;}
+
+                        else if ( (LA11_0=='(') ) {s = 14;}
+
+                        else if ( (LA11_0==')') ) {s = 15;}
+
+                        else if ( (LA11_0==':') ) {s = 16;}
+
+                        else if ( (LA11_0=='!') ) {s = 17;}
+
+                        else if ( (LA11_0=='+') ) {s = 18;}
+
+                        else if ( (LA11_0=='s') ) {s = 19;}
+
+                        else if ( (LA11_0=='=') ) {s = 20;}
+
+                        else if ( (LA11_0=='*') ) {s = 21;}
+
+                        else if ( (LA11_0=='t') ) {s = 22;}
+
+                        else if ( (LA11_0=='f') ) {s = 23;}
+
+                        else if ( (LA11_0=='u') ) {s = 24;}
+
+                        else if ( (LA11_0=='?') ) {s = 25;}
+
+                        else if ( (LA11_0=='\"') ) {s = 26;}
+
+                        else if ( (LA11_0=='\'') ) {s = 27;}
+
+                        else if ( (LA11_0=='^') ) {s = 28;}
+
+                        else if ( ((LA11_0>='A' && LA11_0<='Z')||LA11_0=='_'||LA11_0=='b'||LA11_0=='d'||(LA11_0>='g' && LA11_0<='n')||LA11_0=='q'||(LA11_0>='v' && LA11_0<='z')) ) {s = 29;}
+
+                        else if ( ((LA11_0>='0' && LA11_0<='9')) ) {s = 30;}
+
+                        else if ( (LA11_0=='/') ) {s = 31;}
+
+                        else if ( ((LA11_0>='\t' && LA11_0<='\n')||LA11_0=='\r'||LA11_0==' ') ) {s = 32;}
+
+                        else if ( ((LA11_0>='\u0000' && LA11_0<='\b')||(LA11_0>='\u000B' && LA11_0<='\f')||(LA11_0>='\u000E' && LA11_0<='\u001F')||(LA11_0>='#' && LA11_0<='&')||LA11_0=='-'||LA11_0=='<'||LA11_0=='>'||LA11_0=='@'||LA11_0=='\\'||LA11_0=='`'||LA11_0=='|'||(LA11_0>='~' && LA11_0<='\uFFFF')) ) {s = 33;}
+
+                        if ( s>=0 ) return s;
+                        break;
+            }
+            NoViableAltException nvae =
+                new NoViableAltException(getDescription(), 11, _s, input);
+            error(nvae);
+            throw nvae;
+        }
+    }
+ 
+
+}
\ No newline at end of file
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java
new file mode 100644
index 00000000..28b54551
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/parser/antlr/internal/InternalProblemParser.java
@@ -0,0 +1,5296 @@
+package org.eclipse.viatra.solver.language.parser.antlr.internal;
+
+import org.eclipse.xtext.*;
+import org.eclipse.xtext.parser.*;
+import org.eclipse.xtext.parser.impl.*;
+import org.eclipse.emf.ecore.util.EcoreUtil;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.common.util.Enumerator;
+import org.eclipse.xtext.parser.antlr.AbstractInternalAntlrParser;
+import org.eclipse.xtext.parser.antlr.XtextTokenStream;
+import org.eclipse.xtext.parser.antlr.XtextTokenStream.HiddenTokens;
+import org.eclipse.xtext.parser.antlr.AntlrDatatypeRuleToken;
+import org.eclipse.viatra.solver.language.services.ProblemGrammarAccess;
+
+
+
+import org.antlr.runtime.*;
+import java.util.Stack;
+import java.util.List;
+import java.util.ArrayList;
+
+@SuppressWarnings("all")
+public class InternalProblemParser extends AbstractInternalAntlrParser {
+    public static final String[] tokenNames = new String[] {
+        "<invalid>", "<EOR>", "<DOWN>", "<UP>", "RULE_ID", "RULE_INT", "RULE_QUOTED_ID", "RULE_STRING", "RULE_ML_COMMENT", "RULE_SL_COMMENT", "RULE_WS", "RULE_ANY_OTHER", "'problem'", "'.'", "'abstract'", "'class'", "'extends'", "','", "'{'", "';'", "'}'", "'enum'", "'contains'", "'refers'", "'['", "']'", "'opposite'", "'error'", "'pred'", "'('", "')'", "':-'", "'!'", "'+'", "':'", "'scope'", "'+='", "'='", "'..'", "'*'", "'true'", "'false'", "'unknown'", "'?'"
+    };
+    public static final int T__19=19;
+    public static final int T__15=15;
+    public static final int T__16=16;
+    public static final int T__17=17;
+    public static final int T__18=18;
+    public static final int T__12=12;
+    public static final int T__13=13;
+    public static final int T__14=14;
+    public static final int RULE_ID=4;
+    public static final int RULE_QUOTED_ID=6;
+    public static final int T__26=26;
+    public static final int T__27=27;
+    public static final int T__28=28;
+    public static final int RULE_INT=5;
+    public static final int T__29=29;
+    public static final int T__22=22;
+    public static final int RULE_ML_COMMENT=8;
+    public static final int T__23=23;
+    public static final int T__24=24;
+    public static final int T__25=25;
+    public static final int T__20=20;
+    public static final int T__21=21;
+    public static final int RULE_STRING=7;
+    public static final int RULE_SL_COMMENT=9;
+    public static final int T__37=37;
+    public static final int T__38=38;
+    public static final int T__39=39;
+    public static final int T__33=33;
+    public static final int T__34=34;
+    public static final int T__35=35;
+    public static final int T__36=36;
+    public static final int EOF=-1;
+    public static final int T__30=30;
+    public static final int T__31=31;
+    public static final int T__32=32;
+    public static final int RULE_WS=10;
+    public static final int RULE_ANY_OTHER=11;
+    public static final int T__40=40;
+    public static final int T__41=41;
+    public static final int T__42=42;
+    public static final int T__43=43;
+
+    // delegates
+    // delegators
+
+
+        public InternalProblemParser(TokenStream input) {
+            this(input, new RecognizerSharedState());
+        }
+        public InternalProblemParser(TokenStream input, RecognizerSharedState state) {
+            super(input, state);
+             
+        }
+        
+
+    public String[] getTokenNames() { return InternalProblemParser.tokenNames; }
+    public String getGrammarFileName() { return "InternalProblem.g"; }
+
+
+
+        private ProblemGrammarAccess grammarAccess;
+
+        public InternalProblemParser(TokenStream input, ProblemGrammarAccess grammarAccess) {
+            this(input);
+            this.grammarAccess = grammarAccess;
+            registerRules(grammarAccess.getGrammar());
+        }
+
+        @Override
+        protected String getFirstRuleName() {
+                return "Problem";
+        }
+
+        @Override
+        protected ProblemGrammarAccess getGrammarAccess() {
+                return grammarAccess;
+        }
+
+
+
+
+    // $ANTLR start "entryRuleProblem"
+    // InternalProblem.g:65:1: entryRuleProblem returns [EObject current=null] : iv_ruleProblem= ruleProblem EOF ;
+    public final EObject entryRuleProblem() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleProblem = null;
+
+
+        try {
+            // InternalProblem.g:65:48: (iv_ruleProblem= ruleProblem EOF )
+            // InternalProblem.g:66:2: iv_ruleProblem= ruleProblem EOF
+            {
+             newCompositeNode(grammarAccess.getProblemRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleProblem=ruleProblem();
+
+            state._fsp--;
+
+             current =iv_ruleProblem; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleProblem"
+
+
+    // $ANTLR start "ruleProblem"
+    // InternalProblem.g:72:1: ruleProblem returns [EObject current=null] : ( (otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.' )? ( (lv_statements_3_0= ruleStatement ) )* ) ;
+    public final EObject ruleProblem() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_0=null;
+        Token otherlv_2=null;
+        AntlrDatatypeRuleToken lv_name_1_0 = null;
+
+        EObject lv_statements_3_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:78:2: ( ( (otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.' )? ( (lv_statements_3_0= ruleStatement ) )* ) )
+            // InternalProblem.g:79:2: ( (otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.' )? ( (lv_statements_3_0= ruleStatement ) )* )
+            {
+            // InternalProblem.g:79:2: ( (otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.' )? ( (lv_statements_3_0= ruleStatement ) )* )
+            // InternalProblem.g:80:3: (otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.' )? ( (lv_statements_3_0= ruleStatement ) )*
+            {
+            // InternalProblem.g:80:3: (otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.' )?
+            int alt1=2;
+            int LA1_0 = input.LA(1);
+
+            if ( (LA1_0==12) ) {
+                alt1=1;
+            }
+            switch (alt1) {
+                case 1 :
+                    // InternalProblem.g:81:4: otherlv_0= 'problem' ( (lv_name_1_0= ruleIdentifier ) ) otherlv_2= '.'
+                    {
+                    otherlv_0=(Token)match(input,12,FOLLOW_3); 
+
+                                                newLeafNode(otherlv_0, grammarAccess.getProblemAccess().getProblemKeyword_0_0());
+                                        
+                    // InternalProblem.g:85:4: ( (lv_name_1_0= ruleIdentifier ) )
+                    // InternalProblem.g:86:5: (lv_name_1_0= ruleIdentifier )
+                    {
+                    // InternalProblem.g:86:5: (lv_name_1_0= ruleIdentifier )
+                    // InternalProblem.g:87:6: lv_name_1_0= ruleIdentifier
+                    {
+
+                                                                newCompositeNode(grammarAccess.getProblemAccess().getNameIdentifierParserRuleCall_0_1_0());
+                                                        
+                    pushFollow(FOLLOW_4);
+                    lv_name_1_0=ruleIdentifier();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getProblemRule());
+                                                                }
+                                                                set(
+                                                                        current,
+                                                                        "name",
+                                                                        lv_name_1_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+                    otherlv_2=(Token)match(input,13,FOLLOW_5); 
+
+                                                newLeafNode(otherlv_2, grammarAccess.getProblemAccess().getFullStopKeyword_0_2());
+                                        
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:109:3: ( (lv_statements_3_0= ruleStatement ) )*
+            loop2:
+            do {
+                int alt2=2;
+                int LA2_0 = input.LA(1);
+
+                if ( (LA2_0==RULE_ID||LA2_0==RULE_QUOTED_ID||(LA2_0>=14 && LA2_0<=15)||LA2_0==21||(LA2_0>=27 && LA2_0<=28)||LA2_0==32||LA2_0==35||(LA2_0>=40 && LA2_0<=41)||LA2_0==43) ) {
+                    alt2=1;
+                }
+
+
+                switch (alt2) {
+                case 1 :
+                    // InternalProblem.g:110:4: (lv_statements_3_0= ruleStatement )
+                    {
+                    // InternalProblem.g:110:4: (lv_statements_3_0= ruleStatement )
+                    // InternalProblem.g:111:5: lv_statements_3_0= ruleStatement
+                    {
+
+                                                        newCompositeNode(grammarAccess.getProblemAccess().getStatementsStatementParserRuleCall_1_0());
+                                                
+                    pushFollow(FOLLOW_5);
+                    lv_statements_3_0=ruleStatement();
+
+                    state._fsp--;
+
+
+                                                        if (current==null) {
+                                                                current = createModelElementForParent(grammarAccess.getProblemRule());
+                                                        }
+                                                        add(
+                                                                current,
+                                                                "statements",
+                                                                lv_statements_3_0,
+                                                                "org.eclipse.viatra.solver.language.Problem.Statement");
+                                                        afterParserOrEnumRuleCall();
+                                                
+
+                    }
+
+
+                    }
+                    break;
+
+                default :
+                    break loop2;
+                }
+            } while (true);
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleProblem"
+
+
+    // $ANTLR start "entryRuleStatement"
+    // InternalProblem.g:132:1: entryRuleStatement returns [EObject current=null] : iv_ruleStatement= ruleStatement EOF ;
+    public final EObject entryRuleStatement() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleStatement = null;
+
+
+        try {
+            // InternalProblem.g:132:50: (iv_ruleStatement= ruleStatement EOF )
+            // InternalProblem.g:133:2: iv_ruleStatement= ruleStatement EOF
+            {
+             newCompositeNode(grammarAccess.getStatementRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleStatement=ruleStatement();
+
+            state._fsp--;
+
+             current =iv_ruleStatement; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleStatement"
+
+
+    // $ANTLR start "ruleStatement"
+    // InternalProblem.g:139:1: ruleStatement returns [EObject current=null] : (this_ClassDeclaration_0= ruleClassDeclaration | this_EnumDeclaration_1= ruleEnumDeclaration | this_PredicateDefinition_2= rulePredicateDefinition | this_Assertion_3= ruleAssertion | this_ScopeDeclaration_4= ruleScopeDeclaration ) ;
+    public final EObject ruleStatement() throws RecognitionException {
+        EObject current = null;
+
+        EObject this_ClassDeclaration_0 = null;
+
+        EObject this_EnumDeclaration_1 = null;
+
+        EObject this_PredicateDefinition_2 = null;
+
+        EObject this_Assertion_3 = null;
+
+        EObject this_ScopeDeclaration_4 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:145:2: ( (this_ClassDeclaration_0= ruleClassDeclaration | this_EnumDeclaration_1= ruleEnumDeclaration | this_PredicateDefinition_2= rulePredicateDefinition | this_Assertion_3= ruleAssertion | this_ScopeDeclaration_4= ruleScopeDeclaration ) )
+            // InternalProblem.g:146:2: (this_ClassDeclaration_0= ruleClassDeclaration | this_EnumDeclaration_1= ruleEnumDeclaration | this_PredicateDefinition_2= rulePredicateDefinition | this_Assertion_3= ruleAssertion | this_ScopeDeclaration_4= ruleScopeDeclaration )
+            {
+            // InternalProblem.g:146:2: (this_ClassDeclaration_0= ruleClassDeclaration | this_EnumDeclaration_1= ruleEnumDeclaration | this_PredicateDefinition_2= rulePredicateDefinition | this_Assertion_3= ruleAssertion | this_ScopeDeclaration_4= ruleScopeDeclaration )
+            int alt3=5;
+            switch ( input.LA(1) ) {
+            case 14:
+            case 15:
+                {
+                alt3=1;
+                }
+                break;
+            case 21:
+                {
+                alt3=2;
+                }
+                break;
+            case 27:
+            case 28:
+                {
+                alt3=3;
+                }
+                break;
+            case RULE_ID:
+            case RULE_QUOTED_ID:
+            case 32:
+            case 40:
+            case 41:
+            case 43:
+                {
+                alt3=4;
+                }
+                break;
+            case 35:
+                {
+                alt3=5;
+                }
+                break;
+            default:
+                NoViableAltException nvae =
+                    new NoViableAltException("", 3, 0, input);
+
+                throw nvae;
+            }
+
+            switch (alt3) {
+                case 1 :
+                    // InternalProblem.g:147:3: this_ClassDeclaration_0= ruleClassDeclaration
+                    {
+
+                                        newCompositeNode(grammarAccess.getStatementAccess().getClassDeclarationParserRuleCall_0());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_ClassDeclaration_0=ruleClassDeclaration();
+
+                    state._fsp--;
+
+
+                                        current = this_ClassDeclaration_0;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:156:3: this_EnumDeclaration_1= ruleEnumDeclaration
+                    {
+
+                                        newCompositeNode(grammarAccess.getStatementAccess().getEnumDeclarationParserRuleCall_1());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_EnumDeclaration_1=ruleEnumDeclaration();
+
+                    state._fsp--;
+
+
+                                        current = this_EnumDeclaration_1;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 3 :
+                    // InternalProblem.g:165:3: this_PredicateDefinition_2= rulePredicateDefinition
+                    {
+
+                                        newCompositeNode(grammarAccess.getStatementAccess().getPredicateDefinitionParserRuleCall_2());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_PredicateDefinition_2=rulePredicateDefinition();
+
+                    state._fsp--;
+
+
+                                        current = this_PredicateDefinition_2;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 4 :
+                    // InternalProblem.g:174:3: this_Assertion_3= ruleAssertion
+                    {
+
+                                        newCompositeNode(grammarAccess.getStatementAccess().getAssertionParserRuleCall_3());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_Assertion_3=ruleAssertion();
+
+                    state._fsp--;
+
+
+                                        current = this_Assertion_3;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 5 :
+                    // InternalProblem.g:183:3: this_ScopeDeclaration_4= ruleScopeDeclaration
+                    {
+
+                                        newCompositeNode(grammarAccess.getStatementAccess().getScopeDeclarationParserRuleCall_4());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_ScopeDeclaration_4=ruleScopeDeclaration();
+
+                    state._fsp--;
+
+
+                                        current = this_ScopeDeclaration_4;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleStatement"
+
+
+    // $ANTLR start "entryRuleClassDeclaration"
+    // InternalProblem.g:195:1: entryRuleClassDeclaration returns [EObject current=null] : iv_ruleClassDeclaration= ruleClassDeclaration EOF ;
+    public final EObject entryRuleClassDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleClassDeclaration = null;
+
+
+        try {
+            // InternalProblem.g:195:57: (iv_ruleClassDeclaration= ruleClassDeclaration EOF )
+            // InternalProblem.g:196:2: iv_ruleClassDeclaration= ruleClassDeclaration EOF
+            {
+             newCompositeNode(grammarAccess.getClassDeclarationRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleClassDeclaration=ruleClassDeclaration();
+
+            state._fsp--;
+
+             current =iv_ruleClassDeclaration; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleClassDeclaration"
+
+
+    // $ANTLR start "ruleClassDeclaration"
+    // InternalProblem.g:202:1: ruleClassDeclaration returns [EObject current=null] : ( ( (lv_abstract_0_0= 'abstract' ) )? otherlv_1= 'class' ( (lv_name_2_0= ruleIdentifier ) ) (otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )* )? ( (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' ) | otherlv_11= '.' ) ) ;
+    public final EObject ruleClassDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        Token lv_abstract_0_0=null;
+        Token otherlv_1=null;
+        Token otherlv_3=null;
+        Token otherlv_5=null;
+        Token otherlv_7=null;
+        Token otherlv_9=null;
+        Token otherlv_10=null;
+        Token otherlv_11=null;
+        AntlrDatatypeRuleToken lv_name_2_0 = null;
+
+        EObject lv_referenceDeclarations_8_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:208:2: ( ( ( (lv_abstract_0_0= 'abstract' ) )? otherlv_1= 'class' ( (lv_name_2_0= ruleIdentifier ) ) (otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )* )? ( (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' ) | otherlv_11= '.' ) ) )
+            // InternalProblem.g:209:2: ( ( (lv_abstract_0_0= 'abstract' ) )? otherlv_1= 'class' ( (lv_name_2_0= ruleIdentifier ) ) (otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )* )? ( (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' ) | otherlv_11= '.' ) )
+            {
+            // InternalProblem.g:209:2: ( ( (lv_abstract_0_0= 'abstract' ) )? otherlv_1= 'class' ( (lv_name_2_0= ruleIdentifier ) ) (otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )* )? ( (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' ) | otherlv_11= '.' ) )
+            // InternalProblem.g:210:3: ( (lv_abstract_0_0= 'abstract' ) )? otherlv_1= 'class' ( (lv_name_2_0= ruleIdentifier ) ) (otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )* )? ( (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' ) | otherlv_11= '.' )
+            {
+            // InternalProblem.g:210:3: ( (lv_abstract_0_0= 'abstract' ) )?
+            int alt4=2;
+            int LA4_0 = input.LA(1);
+
+            if ( (LA4_0==14) ) {
+                alt4=1;
+            }
+            switch (alt4) {
+                case 1 :
+                    // InternalProblem.g:211:4: (lv_abstract_0_0= 'abstract' )
+                    {
+                    // InternalProblem.g:211:4: (lv_abstract_0_0= 'abstract' )
+                    // InternalProblem.g:212:5: lv_abstract_0_0= 'abstract'
+                    {
+                    lv_abstract_0_0=(Token)match(input,14,FOLLOW_6); 
+
+                                                        newLeafNode(lv_abstract_0_0, grammarAccess.getClassDeclarationAccess().getAbstractAbstractKeyword_0_0());
+                                                
+
+                                                        if (current==null) {
+                                                                current = createModelElement(grammarAccess.getClassDeclarationRule());
+                                                        }
+                                                        setWithLastConsumed(current, "abstract", lv_abstract_0_0 != null, "abstract");
+                                                
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+            otherlv_1=(Token)match(input,15,FOLLOW_3); 
+
+                                newLeafNode(otherlv_1, grammarAccess.getClassDeclarationAccess().getClassKeyword_1());
+                        
+            // InternalProblem.g:228:3: ( (lv_name_2_0= ruleIdentifier ) )
+            // InternalProblem.g:229:4: (lv_name_2_0= ruleIdentifier )
+            {
+            // InternalProblem.g:229:4: (lv_name_2_0= ruleIdentifier )
+            // InternalProblem.g:230:5: lv_name_2_0= ruleIdentifier
+            {
+
+                                                newCompositeNode(grammarAccess.getClassDeclarationAccess().getNameIdentifierParserRuleCall_2_0());
+                                        
+            pushFollow(FOLLOW_7);
+            lv_name_2_0=ruleIdentifier();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getClassDeclarationRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "name",
+                                                        lv_name_2_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:247:3: (otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )* )?
+            int alt6=2;
+            int LA6_0 = input.LA(1);
+
+            if ( (LA6_0==16) ) {
+                alt6=1;
+            }
+            switch (alt6) {
+                case 1 :
+                    // InternalProblem.g:248:4: otherlv_3= 'extends' ( ( ruleQualifiedName ) ) (otherlv_5= ',' ( ( ruleQualifiedName ) ) )*
+                    {
+                    otherlv_3=(Token)match(input,16,FOLLOW_8); 
+
+                                                newLeafNode(otherlv_3, grammarAccess.getClassDeclarationAccess().getExtendsKeyword_3_0());
+                                        
+                    // InternalProblem.g:252:4: ( ( ruleQualifiedName ) )
+                    // InternalProblem.g:253:5: ( ruleQualifiedName )
+                    {
+                    // InternalProblem.g:253:5: ( ruleQualifiedName )
+                    // InternalProblem.g:254:6: ruleQualifiedName
+                    {
+
+                                                                if (current==null) {
+                                                                        current = createModelElement(grammarAccess.getClassDeclarationRule());
+                                                                }
+                                                        
+
+                                                                newCompositeNode(grammarAccess.getClassDeclarationAccess().getSuperTypesRelationCrossReference_3_1_0());
+                                                        
+                    pushFollow(FOLLOW_9);
+                    ruleQualifiedName();
+
+                    state._fsp--;
+
+
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+                    // InternalProblem.g:268:4: (otherlv_5= ',' ( ( ruleQualifiedName ) ) )*
+                    loop5:
+                    do {
+                        int alt5=2;
+                        int LA5_0 = input.LA(1);
+
+                        if ( (LA5_0==17) ) {
+                            alt5=1;
+                        }
+
+
+                        switch (alt5) {
+                        case 1 :
+                            // InternalProblem.g:269:5: otherlv_5= ',' ( ( ruleQualifiedName ) )
+                            {
+                            otherlv_5=(Token)match(input,17,FOLLOW_8); 
+
+                                                                newLeafNode(otherlv_5, grammarAccess.getClassDeclarationAccess().getCommaKeyword_3_2_0());
+                                                        
+                            // InternalProblem.g:273:5: ( ( ruleQualifiedName ) )
+                            // InternalProblem.g:274:6: ( ruleQualifiedName )
+                            {
+                            // InternalProblem.g:274:6: ( ruleQualifiedName )
+                            // InternalProblem.g:275:7: ruleQualifiedName
+                            {
+
+                                                                                if (current==null) {
+                                                                                        current = createModelElement(grammarAccess.getClassDeclarationRule());
+                                                                                }
+                                                                        
+
+                                                                                newCompositeNode(grammarAccess.getClassDeclarationAccess().getSuperTypesRelationCrossReference_3_2_1_0());
+                                                                        
+                            pushFollow(FOLLOW_9);
+                            ruleQualifiedName();
+
+                            state._fsp--;
+
+
+                                                                                afterParserOrEnumRuleCall();
+                                                                        
+
+                            }
+
+
+                            }
+
+
+                            }
+                            break;
+
+                        default :
+                            break loop5;
+                        }
+                    } while (true);
+
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:291:3: ( (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' ) | otherlv_11= '.' )
+            int alt9=2;
+            int LA9_0 = input.LA(1);
+
+            if ( (LA9_0==18) ) {
+                alt9=1;
+            }
+            else if ( (LA9_0==13) ) {
+                alt9=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 9, 0, input);
+
+                throw nvae;
+            }
+            switch (alt9) {
+                case 1 :
+                    // InternalProblem.g:292:4: (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' )
+                    {
+                    // InternalProblem.g:292:4: (otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}' )
+                    // InternalProblem.g:293:5: otherlv_7= '{' ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )* otherlv_10= '}'
+                    {
+                    otherlv_7=(Token)match(input,18,FOLLOW_10); 
+
+                                                        newLeafNode(otherlv_7, grammarAccess.getClassDeclarationAccess().getLeftCurlyBracketKeyword_4_0_0());
+                                                
+                    // InternalProblem.g:297:5: ( ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )? )*
+                    loop8:
+                    do {
+                        int alt8=2;
+                        int LA8_0 = input.LA(1);
+
+                        if ( (LA8_0==RULE_ID||LA8_0==RULE_QUOTED_ID||(LA8_0>=22 && LA8_0<=23)||(LA8_0>=40 && LA8_0<=41)) ) {
+                            alt8=1;
+                        }
+
+
+                        switch (alt8) {
+                        case 1 :
+                            // InternalProblem.g:298:6: ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) ) (otherlv_9= ';' )?
+                            {
+                            // InternalProblem.g:298:6: ( (lv_referenceDeclarations_8_0= ruleReferenceDeclaration ) )
+                            // InternalProblem.g:299:7: (lv_referenceDeclarations_8_0= ruleReferenceDeclaration )
+                            {
+                            // InternalProblem.g:299:7: (lv_referenceDeclarations_8_0= ruleReferenceDeclaration )
+                            // InternalProblem.g:300:8: lv_referenceDeclarations_8_0= ruleReferenceDeclaration
+                            {
+
+                                                                                        newCompositeNode(grammarAccess.getClassDeclarationAccess().getReferenceDeclarationsReferenceDeclarationParserRuleCall_4_0_1_0_0());
+                                                                                
+                            pushFollow(FOLLOW_11);
+                            lv_referenceDeclarations_8_0=ruleReferenceDeclaration();
+
+                            state._fsp--;
+
+
+                                                                                        if (current==null) {
+                                                                                                current = createModelElementForParent(grammarAccess.getClassDeclarationRule());
+                                                                                        }
+                                                                                        add(
+                                                                                                current,
+                                                                                                "referenceDeclarations",
+                                                                                                lv_referenceDeclarations_8_0,
+                                                                                                "org.eclipse.viatra.solver.language.Problem.ReferenceDeclaration");
+                                                                                        afterParserOrEnumRuleCall();
+                                                                                
+
+                            }
+
+
+                            }
+
+                            // InternalProblem.g:317:6: (otherlv_9= ';' )?
+                            int alt7=2;
+                            int LA7_0 = input.LA(1);
+
+                            if ( (LA7_0==19) ) {
+                                alt7=1;
+                            }
+                            switch (alt7) {
+                                case 1 :
+                                    // InternalProblem.g:318:7: otherlv_9= ';'
+                                    {
+                                    otherlv_9=(Token)match(input,19,FOLLOW_10); 
+
+                                                                                        newLeafNode(otherlv_9, grammarAccess.getClassDeclarationAccess().getSemicolonKeyword_4_0_1_1());
+                                                                                
+
+                                    }
+                                    break;
+
+                            }
+
+
+                            }
+                            break;
+
+                        default :
+                            break loop8;
+                        }
+                    } while (true);
+
+                    otherlv_10=(Token)match(input,20,FOLLOW_2); 
+
+                                                        newLeafNode(otherlv_10, grammarAccess.getClassDeclarationAccess().getRightCurlyBracketKeyword_4_0_2());
+                                                
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:330:4: otherlv_11= '.'
+                    {
+                    otherlv_11=(Token)match(input,13,FOLLOW_2); 
+
+                                                newLeafNode(otherlv_11, grammarAccess.getClassDeclarationAccess().getFullStopKeyword_4_1());
+                                        
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleClassDeclaration"
+
+
+    // $ANTLR start "entryRuleEnumDeclaration"
+    // InternalProblem.g:339:1: entryRuleEnumDeclaration returns [EObject current=null] : iv_ruleEnumDeclaration= ruleEnumDeclaration EOF ;
+    public final EObject entryRuleEnumDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleEnumDeclaration = null;
+
+
+        try {
+            // InternalProblem.g:339:56: (iv_ruleEnumDeclaration= ruleEnumDeclaration EOF )
+            // InternalProblem.g:340:2: iv_ruleEnumDeclaration= ruleEnumDeclaration EOF
+            {
+             newCompositeNode(grammarAccess.getEnumDeclarationRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleEnumDeclaration=ruleEnumDeclaration();
+
+            state._fsp--;
+
+             current =iv_ruleEnumDeclaration; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleEnumDeclaration"
+
+
+    // $ANTLR start "ruleEnumDeclaration"
+    // InternalProblem.g:346:1: ruleEnumDeclaration returns [EObject current=null] : (otherlv_0= 'enum' ( (lv_name_1_0= ruleIdentifier ) ) ( (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' ) | otherlv_9= '.' ) ) ;
+    public final EObject ruleEnumDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_0=null;
+        Token otherlv_2=null;
+        Token otherlv_4=null;
+        Token otherlv_6=null;
+        Token otherlv_7=null;
+        Token otherlv_8=null;
+        Token otherlv_9=null;
+        AntlrDatatypeRuleToken lv_name_1_0 = null;
+
+        EObject lv_literals_3_0 = null;
+
+        EObject lv_literals_5_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:352:2: ( (otherlv_0= 'enum' ( (lv_name_1_0= ruleIdentifier ) ) ( (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' ) | otherlv_9= '.' ) ) )
+            // InternalProblem.g:353:2: (otherlv_0= 'enum' ( (lv_name_1_0= ruleIdentifier ) ) ( (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' ) | otherlv_9= '.' ) )
+            {
+            // InternalProblem.g:353:2: (otherlv_0= 'enum' ( (lv_name_1_0= ruleIdentifier ) ) ( (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' ) | otherlv_9= '.' ) )
+            // InternalProblem.g:354:3: otherlv_0= 'enum' ( (lv_name_1_0= ruleIdentifier ) ) ( (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' ) | otherlv_9= '.' )
+            {
+            otherlv_0=(Token)match(input,21,FOLLOW_3); 
+
+                                newLeafNode(otherlv_0, grammarAccess.getEnumDeclarationAccess().getEnumKeyword_0());
+                        
+            // InternalProblem.g:358:3: ( (lv_name_1_0= ruleIdentifier ) )
+            // InternalProblem.g:359:4: (lv_name_1_0= ruleIdentifier )
+            {
+            // InternalProblem.g:359:4: (lv_name_1_0= ruleIdentifier )
+            // InternalProblem.g:360:5: lv_name_1_0= ruleIdentifier
+            {
+
+                                                newCompositeNode(grammarAccess.getEnumDeclarationAccess().getNameIdentifierParserRuleCall_1_0());
+                                        
+            pushFollow(FOLLOW_12);
+            lv_name_1_0=ruleIdentifier();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getEnumDeclarationRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "name",
+                                                        lv_name_1_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:377:3: ( (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' ) | otherlv_9= '.' )
+            int alt13=2;
+            int LA13_0 = input.LA(1);
+
+            if ( (LA13_0==18) ) {
+                alt13=1;
+            }
+            else if ( (LA13_0==13) ) {
+                alt13=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 13, 0, input);
+
+                throw nvae;
+            }
+            switch (alt13) {
+                case 1 :
+                    // InternalProblem.g:378:4: (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' )
+                    {
+                    // InternalProblem.g:378:4: (otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}' )
+                    // InternalProblem.g:379:5: otherlv_2= '{' ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )? otherlv_8= '}'
+                    {
+                    otherlv_2=(Token)match(input,18,FOLLOW_13); 
+
+                                                        newLeafNode(otherlv_2, grammarAccess.getEnumDeclarationAccess().getLeftCurlyBracketKeyword_2_0_0());
+                                                
+                    // InternalProblem.g:383:5: ( ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )? )?
+                    int alt12=2;
+                    int LA12_0 = input.LA(1);
+
+                    if ( (LA12_0==RULE_ID||LA12_0==RULE_QUOTED_ID||(LA12_0>=40 && LA12_0<=41)) ) {
+                        alt12=1;
+                    }
+                    switch (alt12) {
+                        case 1 :
+                            // InternalProblem.g:384:6: ( (lv_literals_3_0= ruleEnumLiteral ) ) (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )* (otherlv_6= ',' | otherlv_7= ';' )?
+                            {
+                            // InternalProblem.g:384:6: ( (lv_literals_3_0= ruleEnumLiteral ) )
+                            // InternalProblem.g:385:7: (lv_literals_3_0= ruleEnumLiteral )
+                            {
+                            // InternalProblem.g:385:7: (lv_literals_3_0= ruleEnumLiteral )
+                            // InternalProblem.g:386:8: lv_literals_3_0= ruleEnumLiteral
+                            {
+
+                                                                                        newCompositeNode(grammarAccess.getEnumDeclarationAccess().getLiteralsEnumLiteralParserRuleCall_2_0_1_0_0());
+                                                                                
+                            pushFollow(FOLLOW_14);
+                            lv_literals_3_0=ruleEnumLiteral();
+
+                            state._fsp--;
+
+
+                                                                                        if (current==null) {
+                                                                                                current = createModelElementForParent(grammarAccess.getEnumDeclarationRule());
+                                                                                        }
+                                                                                        add(
+                                                                                                current,
+                                                                                                "literals",
+                                                                                                lv_literals_3_0,
+                                                                                                "org.eclipse.viatra.solver.language.Problem.EnumLiteral");
+                                                                                        afterParserOrEnumRuleCall();
+                                                                                
+
+                            }
+
+
+                            }
+
+                            // InternalProblem.g:403:6: (otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) ) )*
+                            loop10:
+                            do {
+                                int alt10=2;
+                                int LA10_0 = input.LA(1);
+
+                                if ( (LA10_0==17) ) {
+                                    int LA10_1 = input.LA(2);
+
+                                    if ( (LA10_1==RULE_ID||LA10_1==RULE_QUOTED_ID||(LA10_1>=40 && LA10_1<=41)) ) {
+                                        alt10=1;
+                                    }
+
+
+                                }
+
+
+                                switch (alt10) {
+                                case 1 :
+                                    // InternalProblem.g:404:7: otherlv_4= ',' ( (lv_literals_5_0= ruleEnumLiteral ) )
+                                    {
+                                    otherlv_4=(Token)match(input,17,FOLLOW_8); 
+
+                                                                                        newLeafNode(otherlv_4, grammarAccess.getEnumDeclarationAccess().getCommaKeyword_2_0_1_1_0());
+                                                                                
+                                    // InternalProblem.g:408:7: ( (lv_literals_5_0= ruleEnumLiteral ) )
+                                    // InternalProblem.g:409:8: (lv_literals_5_0= ruleEnumLiteral )
+                                    {
+                                    // InternalProblem.g:409:8: (lv_literals_5_0= ruleEnumLiteral )
+                                    // InternalProblem.g:410:9: lv_literals_5_0= ruleEnumLiteral
+                                    {
+
+                                                                                                        newCompositeNode(grammarAccess.getEnumDeclarationAccess().getLiteralsEnumLiteralParserRuleCall_2_0_1_1_1_0());
+                                                                                                
+                                    pushFollow(FOLLOW_14);
+                                    lv_literals_5_0=ruleEnumLiteral();
+
+                                    state._fsp--;
+
+
+                                                                                                        if (current==null) {
+                                                                                                                current = createModelElementForParent(grammarAccess.getEnumDeclarationRule());
+                                                                                                        }
+                                                                                                        add(
+                                                                                                                current,
+                                                                                                                "literals",
+                                                                                                                lv_literals_5_0,
+                                                                                                                "org.eclipse.viatra.solver.language.Problem.EnumLiteral");
+                                                                                                        afterParserOrEnumRuleCall();
+                                                                                                
+
+                                    }
+
+
+                                    }
+
+
+                                    }
+                                    break;
+
+                                default :
+                                    break loop10;
+                                }
+                            } while (true);
+
+                            // InternalProblem.g:428:6: (otherlv_6= ',' | otherlv_7= ';' )?
+                            int alt11=3;
+                            int LA11_0 = input.LA(1);
+
+                            if ( (LA11_0==17) ) {
+                                alt11=1;
+                            }
+                            else if ( (LA11_0==19) ) {
+                                alt11=2;
+                            }
+                            switch (alt11) {
+                                case 1 :
+                                    // InternalProblem.g:429:7: otherlv_6= ','
+                                    {
+                                    otherlv_6=(Token)match(input,17,FOLLOW_15); 
+
+                                                                                        newLeafNode(otherlv_6, grammarAccess.getEnumDeclarationAccess().getCommaKeyword_2_0_1_2_0());
+                                                                                
+
+                                    }
+                                    break;
+                                case 2 :
+                                    // InternalProblem.g:434:7: otherlv_7= ';'
+                                    {
+                                    otherlv_7=(Token)match(input,19,FOLLOW_15); 
+
+                                                                                        newLeafNode(otherlv_7, grammarAccess.getEnumDeclarationAccess().getSemicolonKeyword_2_0_1_2_1());
+                                                                                
+
+                                    }
+                                    break;
+
+                            }
+
+
+                            }
+                            break;
+
+                    }
+
+                    otherlv_8=(Token)match(input,20,FOLLOW_2); 
+
+                                                        newLeafNode(otherlv_8, grammarAccess.getEnumDeclarationAccess().getRightCurlyBracketKeyword_2_0_2());
+                                                
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:446:4: otherlv_9= '.'
+                    {
+                    otherlv_9=(Token)match(input,13,FOLLOW_2); 
+
+                                                newLeafNode(otherlv_9, grammarAccess.getEnumDeclarationAccess().getFullStopKeyword_2_1());
+                                        
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleEnumDeclaration"
+
+
+    // $ANTLR start "entryRuleEnumLiteral"
+    // InternalProblem.g:455:1: entryRuleEnumLiteral returns [EObject current=null] : iv_ruleEnumLiteral= ruleEnumLiteral EOF ;
+    public final EObject entryRuleEnumLiteral() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleEnumLiteral = null;
+
+
+        try {
+            // InternalProblem.g:455:52: (iv_ruleEnumLiteral= ruleEnumLiteral EOF )
+            // InternalProblem.g:456:2: iv_ruleEnumLiteral= ruleEnumLiteral EOF
+            {
+             newCompositeNode(grammarAccess.getEnumLiteralRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleEnumLiteral=ruleEnumLiteral();
+
+            state._fsp--;
+
+             current =iv_ruleEnumLiteral; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleEnumLiteral"
+
+
+    // $ANTLR start "ruleEnumLiteral"
+    // InternalProblem.g:462:1: ruleEnumLiteral returns [EObject current=null] : ( (lv_name_0_0= ruleQuotedOrUnquotedId ) ) ;
+    public final EObject ruleEnumLiteral() throws RecognitionException {
+        EObject current = null;
+
+        AntlrDatatypeRuleToken lv_name_0_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:468:2: ( ( (lv_name_0_0= ruleQuotedOrUnquotedId ) ) )
+            // InternalProblem.g:469:2: ( (lv_name_0_0= ruleQuotedOrUnquotedId ) )
+            {
+            // InternalProblem.g:469:2: ( (lv_name_0_0= ruleQuotedOrUnquotedId ) )
+            // InternalProblem.g:470:3: (lv_name_0_0= ruleQuotedOrUnquotedId )
+            {
+            // InternalProblem.g:470:3: (lv_name_0_0= ruleQuotedOrUnquotedId )
+            // InternalProblem.g:471:4: lv_name_0_0= ruleQuotedOrUnquotedId
+            {
+
+                                        newCompositeNode(grammarAccess.getEnumLiteralAccess().getNameQuotedOrUnquotedIdParserRuleCall_0());
+                                
+            pushFollow(FOLLOW_2);
+            lv_name_0_0=ruleQuotedOrUnquotedId();
+
+            state._fsp--;
+
+
+                                        if (current==null) {
+                                                current = createModelElementForParent(grammarAccess.getEnumLiteralRule());
+                                        }
+                                        set(
+                                                current,
+                                                "name",
+                                                lv_name_0_0,
+                                                "org.eclipse.viatra.solver.language.Problem.QuotedOrUnquotedId");
+                                        afterParserOrEnumRuleCall();
+                                
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleEnumLiteral"
+
+
+    // $ANTLR start "entryRuleReferenceDeclaration"
+    // InternalProblem.g:491:1: entryRuleReferenceDeclaration returns [EObject current=null] : iv_ruleReferenceDeclaration= ruleReferenceDeclaration EOF ;
+    public final EObject entryRuleReferenceDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleReferenceDeclaration = null;
+
+
+        try {
+            // InternalProblem.g:491:61: (iv_ruleReferenceDeclaration= ruleReferenceDeclaration EOF )
+            // InternalProblem.g:492:2: iv_ruleReferenceDeclaration= ruleReferenceDeclaration EOF
+            {
+             newCompositeNode(grammarAccess.getReferenceDeclarationRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleReferenceDeclaration=ruleReferenceDeclaration();
+
+            state._fsp--;
+
+             current =iv_ruleReferenceDeclaration; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleReferenceDeclaration"
+
+
+    // $ANTLR start "ruleReferenceDeclaration"
+    // InternalProblem.g:498:1: ruleReferenceDeclaration returns [EObject current=null] : ( ( ( (lv_containment_0_0= 'contains' ) ) | otherlv_1= 'refers' )? ( ( ruleQualifiedName ) ) (otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']' )? ( (lv_name_6_0= ruleIdentifier ) ) (otherlv_7= 'opposite' ( ( ruleQualifiedName ) ) )? ) ;
+    public final EObject ruleReferenceDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        Token lv_containment_0_0=null;
+        Token otherlv_1=null;
+        Token otherlv_3=null;
+        Token otherlv_5=null;
+        Token otherlv_7=null;
+        EObject lv_multiplicity_4_0 = null;
+
+        AntlrDatatypeRuleToken lv_name_6_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:504:2: ( ( ( ( (lv_containment_0_0= 'contains' ) ) | otherlv_1= 'refers' )? ( ( ruleQualifiedName ) ) (otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']' )? ( (lv_name_6_0= ruleIdentifier ) ) (otherlv_7= 'opposite' ( ( ruleQualifiedName ) ) )? ) )
+            // InternalProblem.g:505:2: ( ( ( (lv_containment_0_0= 'contains' ) ) | otherlv_1= 'refers' )? ( ( ruleQualifiedName ) ) (otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']' )? ( (lv_name_6_0= ruleIdentifier ) ) (otherlv_7= 'opposite' ( ( ruleQualifiedName ) ) )? )
+            {
+            // InternalProblem.g:505:2: ( ( ( (lv_containment_0_0= 'contains' ) ) | otherlv_1= 'refers' )? ( ( ruleQualifiedName ) ) (otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']' )? ( (lv_name_6_0= ruleIdentifier ) ) (otherlv_7= 'opposite' ( ( ruleQualifiedName ) ) )? )
+            // InternalProblem.g:506:3: ( ( (lv_containment_0_0= 'contains' ) ) | otherlv_1= 'refers' )? ( ( ruleQualifiedName ) ) (otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']' )? ( (lv_name_6_0= ruleIdentifier ) ) (otherlv_7= 'opposite' ( ( ruleQualifiedName ) ) )?
+            {
+            // InternalProblem.g:506:3: ( ( (lv_containment_0_0= 'contains' ) ) | otherlv_1= 'refers' )?
+            int alt14=3;
+            int LA14_0 = input.LA(1);
+
+            if ( (LA14_0==22) ) {
+                alt14=1;
+            }
+            else if ( (LA14_0==23) ) {
+                alt14=2;
+            }
+            switch (alt14) {
+                case 1 :
+                    // InternalProblem.g:507:4: ( (lv_containment_0_0= 'contains' ) )
+                    {
+                    // InternalProblem.g:507:4: ( (lv_containment_0_0= 'contains' ) )
+                    // InternalProblem.g:508:5: (lv_containment_0_0= 'contains' )
+                    {
+                    // InternalProblem.g:508:5: (lv_containment_0_0= 'contains' )
+                    // InternalProblem.g:509:6: lv_containment_0_0= 'contains'
+                    {
+                    lv_containment_0_0=(Token)match(input,22,FOLLOW_8); 
+
+                                                                newLeafNode(lv_containment_0_0, grammarAccess.getReferenceDeclarationAccess().getContainmentContainsKeyword_0_0_0());
+                                                        
+
+                                                                if (current==null) {
+                                                                        current = createModelElement(grammarAccess.getReferenceDeclarationRule());
+                                                                }
+                                                                setWithLastConsumed(current, "containment", lv_containment_0_0 != null, "contains");
+                                                        
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:522:4: otherlv_1= 'refers'
+                    {
+                    otherlv_1=(Token)match(input,23,FOLLOW_8); 
+
+                                                newLeafNode(otherlv_1, grammarAccess.getReferenceDeclarationAccess().getRefersKeyword_0_1());
+                                        
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:527:3: ( ( ruleQualifiedName ) )
+            // InternalProblem.g:528:4: ( ruleQualifiedName )
+            {
+            // InternalProblem.g:528:4: ( ruleQualifiedName )
+            // InternalProblem.g:529:5: ruleQualifiedName
+            {
+
+                                                if (current==null) {
+                                                        current = createModelElement(grammarAccess.getReferenceDeclarationRule());
+                                                }
+                                        
+
+                                                newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getReferenceTypeRelationCrossReference_1_0());
+                                        
+            pushFollow(FOLLOW_16);
+            ruleQualifiedName();
+
+            state._fsp--;
+
+
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:543:3: (otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']' )?
+            int alt15=2;
+            int LA15_0 = input.LA(1);
+
+            if ( (LA15_0==24) ) {
+                alt15=1;
+            }
+            switch (alt15) {
+                case 1 :
+                    // InternalProblem.g:544:4: otherlv_3= '[' ( (lv_multiplicity_4_0= ruleMultiplicity ) ) otherlv_5= ']'
+                    {
+                    otherlv_3=(Token)match(input,24,FOLLOW_17); 
+
+                                                newLeafNode(otherlv_3, grammarAccess.getReferenceDeclarationAccess().getLeftSquareBracketKeyword_2_0());
+                                        
+                    // InternalProblem.g:548:4: ( (lv_multiplicity_4_0= ruleMultiplicity ) )
+                    // InternalProblem.g:549:5: (lv_multiplicity_4_0= ruleMultiplicity )
+                    {
+                    // InternalProblem.g:549:5: (lv_multiplicity_4_0= ruleMultiplicity )
+                    // InternalProblem.g:550:6: lv_multiplicity_4_0= ruleMultiplicity
+                    {
+
+                                                                newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getMultiplicityMultiplicityParserRuleCall_2_1_0());
+                                                        
+                    pushFollow(FOLLOW_18);
+                    lv_multiplicity_4_0=ruleMultiplicity();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getReferenceDeclarationRule());
+                                                                }
+                                                                set(
+                                                                        current,
+                                                                        "multiplicity",
+                                                                        lv_multiplicity_4_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.Multiplicity");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+                    otherlv_5=(Token)match(input,25,FOLLOW_3); 
+
+                                                newLeafNode(otherlv_5, grammarAccess.getReferenceDeclarationAccess().getRightSquareBracketKeyword_2_2());
+                                        
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:572:3: ( (lv_name_6_0= ruleIdentifier ) )
+            // InternalProblem.g:573:4: (lv_name_6_0= ruleIdentifier )
+            {
+            // InternalProblem.g:573:4: (lv_name_6_0= ruleIdentifier )
+            // InternalProblem.g:574:5: lv_name_6_0= ruleIdentifier
+            {
+
+                                                newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getNameIdentifierParserRuleCall_3_0());
+                                        
+            pushFollow(FOLLOW_19);
+            lv_name_6_0=ruleIdentifier();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getReferenceDeclarationRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "name",
+                                                        lv_name_6_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:591:3: (otherlv_7= 'opposite' ( ( ruleQualifiedName ) ) )?
+            int alt16=2;
+            int LA16_0 = input.LA(1);
+
+            if ( (LA16_0==26) ) {
+                alt16=1;
+            }
+            switch (alt16) {
+                case 1 :
+                    // InternalProblem.g:592:4: otherlv_7= 'opposite' ( ( ruleQualifiedName ) )
+                    {
+                    otherlv_7=(Token)match(input,26,FOLLOW_8); 
+
+                                                newLeafNode(otherlv_7, grammarAccess.getReferenceDeclarationAccess().getOppositeKeyword_4_0());
+                                        
+                    // InternalProblem.g:596:4: ( ( ruleQualifiedName ) )
+                    // InternalProblem.g:597:5: ( ruleQualifiedName )
+                    {
+                    // InternalProblem.g:597:5: ( ruleQualifiedName )
+                    // InternalProblem.g:598:6: ruleQualifiedName
+                    {
+
+                                                                if (current==null) {
+                                                                        current = createModelElement(grammarAccess.getReferenceDeclarationRule());
+                                                                }
+                                                        
+
+                                                                newCompositeNode(grammarAccess.getReferenceDeclarationAccess().getOppositeReferenceDeclarationCrossReference_4_1_0());
+                                                        
+                    pushFollow(FOLLOW_2);
+                    ruleQualifiedName();
+
+                    state._fsp--;
+
+
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleReferenceDeclaration"
+
+
+    // $ANTLR start "entryRulePredicateDefinition"
+    // InternalProblem.g:617:1: entryRulePredicateDefinition returns [EObject current=null] : iv_rulePredicateDefinition= rulePredicateDefinition EOF ;
+    public final EObject entryRulePredicateDefinition() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_rulePredicateDefinition = null;
+
+
+        try {
+            // InternalProblem.g:617:60: (iv_rulePredicateDefinition= rulePredicateDefinition EOF )
+            // InternalProblem.g:618:2: iv_rulePredicateDefinition= rulePredicateDefinition EOF
+            {
+             newCompositeNode(grammarAccess.getPredicateDefinitionRule()); 
+            pushFollow(FOLLOW_1);
+            iv_rulePredicateDefinition=rulePredicateDefinition();
+
+            state._fsp--;
+
+             current =iv_rulePredicateDefinition; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRulePredicateDefinition"
+
+
+    // $ANTLR start "rulePredicateDefinition"
+    // InternalProblem.g:624:1: rulePredicateDefinition returns [EObject current=null] : ( ( ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? ) | otherlv_2= 'pred' ) ( (lv_name_3_0= ruleIdentifier ) ) otherlv_4= '(' ( ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )* )? otherlv_8= ')' (otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )* )? otherlv_13= '.' ) ;
+    public final EObject rulePredicateDefinition() throws RecognitionException {
+        EObject current = null;
+
+        Token lv_error_0_0=null;
+        Token otherlv_1=null;
+        Token otherlv_2=null;
+        Token otherlv_4=null;
+        Token otherlv_6=null;
+        Token otherlv_8=null;
+        Token otherlv_9=null;
+        Token otherlv_11=null;
+        Token otherlv_13=null;
+        AntlrDatatypeRuleToken lv_name_3_0 = null;
+
+        EObject lv_parameters_5_0 = null;
+
+        EObject lv_parameters_7_0 = null;
+
+        EObject lv_bodies_10_0 = null;
+
+        EObject lv_bodies_12_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:630:2: ( ( ( ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? ) | otherlv_2= 'pred' ) ( (lv_name_3_0= ruleIdentifier ) ) otherlv_4= '(' ( ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )* )? otherlv_8= ')' (otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )* )? otherlv_13= '.' ) )
+            // InternalProblem.g:631:2: ( ( ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? ) | otherlv_2= 'pred' ) ( (lv_name_3_0= ruleIdentifier ) ) otherlv_4= '(' ( ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )* )? otherlv_8= ')' (otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )* )? otherlv_13= '.' )
+            {
+            // InternalProblem.g:631:2: ( ( ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? ) | otherlv_2= 'pred' ) ( (lv_name_3_0= ruleIdentifier ) ) otherlv_4= '(' ( ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )* )? otherlv_8= ')' (otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )* )? otherlv_13= '.' )
+            // InternalProblem.g:632:3: ( ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? ) | otherlv_2= 'pred' ) ( (lv_name_3_0= ruleIdentifier ) ) otherlv_4= '(' ( ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )* )? otherlv_8= ')' (otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )* )? otherlv_13= '.'
+            {
+            // InternalProblem.g:632:3: ( ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? ) | otherlv_2= 'pred' )
+            int alt18=2;
+            int LA18_0 = input.LA(1);
+
+            if ( (LA18_0==27) ) {
+                alt18=1;
+            }
+            else if ( (LA18_0==28) ) {
+                alt18=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 18, 0, input);
+
+                throw nvae;
+            }
+            switch (alt18) {
+                case 1 :
+                    // InternalProblem.g:633:4: ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? )
+                    {
+                    // InternalProblem.g:633:4: ( ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )? )
+                    // InternalProblem.g:634:5: ( (lv_error_0_0= 'error' ) ) (otherlv_1= 'pred' )?
+                    {
+                    // InternalProblem.g:634:5: ( (lv_error_0_0= 'error' ) )
+                    // InternalProblem.g:635:6: (lv_error_0_0= 'error' )
+                    {
+                    // InternalProblem.g:635:6: (lv_error_0_0= 'error' )
+                    // InternalProblem.g:636:7: lv_error_0_0= 'error'
+                    {
+                    lv_error_0_0=(Token)match(input,27,FOLLOW_20); 
+
+                                                                        newLeafNode(lv_error_0_0, grammarAccess.getPredicateDefinitionAccess().getErrorErrorKeyword_0_0_0_0());
+                                                                
+
+                                                                        if (current==null) {
+                                                                                current = createModelElement(grammarAccess.getPredicateDefinitionRule());
+                                                                        }
+                                                                        setWithLastConsumed(current, "error", lv_error_0_0 != null, "error");
+                                                                
+
+                    }
+
+
+                    }
+
+                    // InternalProblem.g:648:5: (otherlv_1= 'pred' )?
+                    int alt17=2;
+                    int LA17_0 = input.LA(1);
+
+                    if ( (LA17_0==28) ) {
+                        alt17=1;
+                    }
+                    switch (alt17) {
+                        case 1 :
+                            // InternalProblem.g:649:6: otherlv_1= 'pred'
+                            {
+                            otherlv_1=(Token)match(input,28,FOLLOW_3); 
+
+                                                                        newLeafNode(otherlv_1, grammarAccess.getPredicateDefinitionAccess().getPredKeyword_0_0_1());
+                                                                
+
+                            }
+                            break;
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:656:4: otherlv_2= 'pred'
+                    {
+                    otherlv_2=(Token)match(input,28,FOLLOW_3); 
+
+                                                newLeafNode(otherlv_2, grammarAccess.getPredicateDefinitionAccess().getPredKeyword_0_1());
+                                        
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:661:3: ( (lv_name_3_0= ruleIdentifier ) )
+            // InternalProblem.g:662:4: (lv_name_3_0= ruleIdentifier )
+            {
+            // InternalProblem.g:662:4: (lv_name_3_0= ruleIdentifier )
+            // InternalProblem.g:663:5: lv_name_3_0= ruleIdentifier
+            {
+
+                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getNameIdentifierParserRuleCall_1_0());
+                                        
+            pushFollow(FOLLOW_21);
+            lv_name_3_0=ruleIdentifier();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "name",
+                                                        lv_name_3_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            otherlv_4=(Token)match(input,29,FOLLOW_22); 
+
+                                newLeafNode(otherlv_4, grammarAccess.getPredicateDefinitionAccess().getLeftParenthesisKeyword_2());
+                        
+            // InternalProblem.g:684:3: ( ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )* )?
+            int alt20=2;
+            int LA20_0 = input.LA(1);
+
+            if ( (LA20_0==RULE_ID||LA20_0==RULE_QUOTED_ID||(LA20_0>=40 && LA20_0<=41)) ) {
+                alt20=1;
+            }
+            switch (alt20) {
+                case 1 :
+                    // InternalProblem.g:685:4: ( (lv_parameters_5_0= ruleParameter ) ) (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )*
+                    {
+                    // InternalProblem.g:685:4: ( (lv_parameters_5_0= ruleParameter ) )
+                    // InternalProblem.g:686:5: (lv_parameters_5_0= ruleParameter )
+                    {
+                    // InternalProblem.g:686:5: (lv_parameters_5_0= ruleParameter )
+                    // InternalProblem.g:687:6: lv_parameters_5_0= ruleParameter
+                    {
+
+                                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getParametersParameterParserRuleCall_3_0_0());
+                                                        
+                    pushFollow(FOLLOW_23);
+                    lv_parameters_5_0=ruleParameter();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                                }
+                                                                add(
+                                                                        current,
+                                                                        "parameters",
+                                                                        lv_parameters_5_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.Parameter");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+                    // InternalProblem.g:704:4: (otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) ) )*
+                    loop19:
+                    do {
+                        int alt19=2;
+                        int LA19_0 = input.LA(1);
+
+                        if ( (LA19_0==17) ) {
+                            alt19=1;
+                        }
+
+
+                        switch (alt19) {
+                        case 1 :
+                            // InternalProblem.g:705:5: otherlv_6= ',' ( (lv_parameters_7_0= ruleParameter ) )
+                            {
+                            otherlv_6=(Token)match(input,17,FOLLOW_8); 
+
+                                                                newLeafNode(otherlv_6, grammarAccess.getPredicateDefinitionAccess().getCommaKeyword_3_1_0());
+                                                        
+                            // InternalProblem.g:709:5: ( (lv_parameters_7_0= ruleParameter ) )
+                            // InternalProblem.g:710:6: (lv_parameters_7_0= ruleParameter )
+                            {
+                            // InternalProblem.g:710:6: (lv_parameters_7_0= ruleParameter )
+                            // InternalProblem.g:711:7: lv_parameters_7_0= ruleParameter
+                            {
+
+                                                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getParametersParameterParserRuleCall_3_1_1_0());
+                                                                        
+                            pushFollow(FOLLOW_23);
+                            lv_parameters_7_0=ruleParameter();
+
+                            state._fsp--;
+
+
+                                                                                if (current==null) {
+                                                                                        current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                                                }
+                                                                                add(
+                                                                                        current,
+                                                                                        "parameters",
+                                                                                        lv_parameters_7_0,
+                                                                                        "org.eclipse.viatra.solver.language.Problem.Parameter");
+                                                                                afterParserOrEnumRuleCall();
+                                                                        
+
+                            }
+
+
+                            }
+
+
+                            }
+                            break;
+
+                        default :
+                            break loop19;
+                        }
+                    } while (true);
+
+
+                    }
+                    break;
+
+            }
+
+            otherlv_8=(Token)match(input,30,FOLLOW_24); 
+
+                                newLeafNode(otherlv_8, grammarAccess.getPredicateDefinitionAccess().getRightParenthesisKeyword_4());
+                        
+            // InternalProblem.g:734:3: (otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )* )?
+            int alt22=2;
+            int LA22_0 = input.LA(1);
+
+            if ( (LA22_0==31) ) {
+                alt22=1;
+            }
+            switch (alt22) {
+                case 1 :
+                    // InternalProblem.g:735:4: otherlv_9= ':-' ( (lv_bodies_10_0= ruleConjunction ) ) (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )*
+                    {
+                    otherlv_9=(Token)match(input,31,FOLLOW_25); 
+
+                                                newLeafNode(otherlv_9, grammarAccess.getPredicateDefinitionAccess().getColonHyphenMinusKeyword_5_0());
+                                        
+                    // InternalProblem.g:739:4: ( (lv_bodies_10_0= ruleConjunction ) )
+                    // InternalProblem.g:740:5: (lv_bodies_10_0= ruleConjunction )
+                    {
+                    // InternalProblem.g:740:5: (lv_bodies_10_0= ruleConjunction )
+                    // InternalProblem.g:741:6: lv_bodies_10_0= ruleConjunction
+                    {
+
+                                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getBodiesConjunctionParserRuleCall_5_1_0());
+                                                        
+                    pushFollow(FOLLOW_26);
+                    lv_bodies_10_0=ruleConjunction();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                                }
+                                                                add(
+                                                                        current,
+                                                                        "bodies",
+                                                                        lv_bodies_10_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.Conjunction");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+                    // InternalProblem.g:758:4: (otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) ) )*
+                    loop21:
+                    do {
+                        int alt21=2;
+                        int LA21_0 = input.LA(1);
+
+                        if ( (LA21_0==19) ) {
+                            alt21=1;
+                        }
+
+
+                        switch (alt21) {
+                        case 1 :
+                            // InternalProblem.g:759:5: otherlv_11= ';' ( (lv_bodies_12_0= ruleConjunction ) )
+                            {
+                            otherlv_11=(Token)match(input,19,FOLLOW_25); 
+
+                                                                newLeafNode(otherlv_11, grammarAccess.getPredicateDefinitionAccess().getSemicolonKeyword_5_2_0());
+                                                        
+                            // InternalProblem.g:763:5: ( (lv_bodies_12_0= ruleConjunction ) )
+                            // InternalProblem.g:764:6: (lv_bodies_12_0= ruleConjunction )
+                            {
+                            // InternalProblem.g:764:6: (lv_bodies_12_0= ruleConjunction )
+                            // InternalProblem.g:765:7: lv_bodies_12_0= ruleConjunction
+                            {
+
+                                                                                newCompositeNode(grammarAccess.getPredicateDefinitionAccess().getBodiesConjunctionParserRuleCall_5_2_1_0());
+                                                                        
+                            pushFollow(FOLLOW_26);
+                            lv_bodies_12_0=ruleConjunction();
+
+                            state._fsp--;
+
+
+                                                                                if (current==null) {
+                                                                                        current = createModelElementForParent(grammarAccess.getPredicateDefinitionRule());
+                                                                                }
+                                                                                add(
+                                                                                        current,
+                                                                                        "bodies",
+                                                                                        lv_bodies_12_0,
+                                                                                        "org.eclipse.viatra.solver.language.Problem.Conjunction");
+                                                                                afterParserOrEnumRuleCall();
+                                                                        
+
+                            }
+
+
+                            }
+
+
+                            }
+                            break;
+
+                        default :
+                            break loop21;
+                        }
+                    } while (true);
+
+
+                    }
+                    break;
+
+            }
+
+            otherlv_13=(Token)match(input,13,FOLLOW_2); 
+
+                                newLeafNode(otherlv_13, grammarAccess.getPredicateDefinitionAccess().getFullStopKeyword_6());
+                        
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "rulePredicateDefinition"
+
+
+    // $ANTLR start "entryRuleParameter"
+    // InternalProblem.g:792:1: entryRuleParameter returns [EObject current=null] : iv_ruleParameter= ruleParameter EOF ;
+    public final EObject entryRuleParameter() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleParameter = null;
+
+
+        try {
+            // InternalProblem.g:792:50: (iv_ruleParameter= ruleParameter EOF )
+            // InternalProblem.g:793:2: iv_ruleParameter= ruleParameter EOF
+            {
+             newCompositeNode(grammarAccess.getParameterRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleParameter=ruleParameter();
+
+            state._fsp--;
+
+             current =iv_ruleParameter; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleParameter"
+
+
+    // $ANTLR start "ruleParameter"
+    // InternalProblem.g:799:1: ruleParameter returns [EObject current=null] : ( ( ( ruleQualifiedName ) )? ( (lv_name_1_0= ruleIdentifier ) ) ) ;
+    public final EObject ruleParameter() throws RecognitionException {
+        EObject current = null;
+
+        AntlrDatatypeRuleToken lv_name_1_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:805:2: ( ( ( ( ruleQualifiedName ) )? ( (lv_name_1_0= ruleIdentifier ) ) ) )
+            // InternalProblem.g:806:2: ( ( ( ruleQualifiedName ) )? ( (lv_name_1_0= ruleIdentifier ) ) )
+            {
+            // InternalProblem.g:806:2: ( ( ( ruleQualifiedName ) )? ( (lv_name_1_0= ruleIdentifier ) ) )
+            // InternalProblem.g:807:3: ( ( ruleQualifiedName ) )? ( (lv_name_1_0= ruleIdentifier ) )
+            {
+            // InternalProblem.g:807:3: ( ( ruleQualifiedName ) )?
+            int alt23=2;
+            switch ( input.LA(1) ) {
+                case RULE_QUOTED_ID:
+                    {
+                    alt23=1;
+                    }
+                    break;
+                case RULE_ID:
+                    {
+                    int LA23_2 = input.LA(2);
+
+                    if ( (LA23_2==RULE_ID||LA23_2==34||(LA23_2>=40 && LA23_2<=41)) ) {
+                        alt23=1;
+                    }
+                    }
+                    break;
+                case 40:
+                    {
+                    int LA23_3 = input.LA(2);
+
+                    if ( (LA23_3==RULE_ID||LA23_3==34||(LA23_3>=40 && LA23_3<=41)) ) {
+                        alt23=1;
+                    }
+                    }
+                    break;
+                case 41:
+                    {
+                    int LA23_4 = input.LA(2);
+
+                    if ( (LA23_4==RULE_ID||LA23_4==34||(LA23_4>=40 && LA23_4<=41)) ) {
+                        alt23=1;
+                    }
+                    }
+                    break;
+            }
+
+            switch (alt23) {
+                case 1 :
+                    // InternalProblem.g:808:4: ( ruleQualifiedName )
+                    {
+                    // InternalProblem.g:808:4: ( ruleQualifiedName )
+                    // InternalProblem.g:809:5: ruleQualifiedName
+                    {
+
+                                                        if (current==null) {
+                                                                current = createModelElement(grammarAccess.getParameterRule());
+                                                        }
+                                                
+
+                                                        newCompositeNode(grammarAccess.getParameterAccess().getParameterTypeRelationCrossReference_0_0());
+                                                
+                    pushFollow(FOLLOW_3);
+                    ruleQualifiedName();
+
+                    state._fsp--;
+
+
+                                                        afterParserOrEnumRuleCall();
+                                                
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:823:3: ( (lv_name_1_0= ruleIdentifier ) )
+            // InternalProblem.g:824:4: (lv_name_1_0= ruleIdentifier )
+            {
+            // InternalProblem.g:824:4: (lv_name_1_0= ruleIdentifier )
+            // InternalProblem.g:825:5: lv_name_1_0= ruleIdentifier
+            {
+
+                                                newCompositeNode(grammarAccess.getParameterAccess().getNameIdentifierParserRuleCall_1_0());
+                                        
+            pushFollow(FOLLOW_2);
+            lv_name_1_0=ruleIdentifier();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getParameterRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "name",
+                                                        lv_name_1_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Identifier");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleParameter"
+
+
+    // $ANTLR start "entryRuleConjunction"
+    // InternalProblem.g:846:1: entryRuleConjunction returns [EObject current=null] : iv_ruleConjunction= ruleConjunction EOF ;
+    public final EObject entryRuleConjunction() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleConjunction = null;
+
+
+        try {
+            // InternalProblem.g:846:52: (iv_ruleConjunction= ruleConjunction EOF )
+            // InternalProblem.g:847:2: iv_ruleConjunction= ruleConjunction EOF
+            {
+             newCompositeNode(grammarAccess.getConjunctionRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleConjunction=ruleConjunction();
+
+            state._fsp--;
+
+             current =iv_ruleConjunction; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleConjunction"
+
+
+    // $ANTLR start "ruleConjunction"
+    // InternalProblem.g:853:1: ruleConjunction returns [EObject current=null] : ( ( (lv_literals_0_0= ruleLiteral ) ) (otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) ) )* ) ;
+    public final EObject ruleConjunction() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_1=null;
+        EObject lv_literals_0_0 = null;
+
+        EObject lv_literals_2_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:859:2: ( ( ( (lv_literals_0_0= ruleLiteral ) ) (otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) ) )* ) )
+            // InternalProblem.g:860:2: ( ( (lv_literals_0_0= ruleLiteral ) ) (otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) ) )* )
+            {
+            // InternalProblem.g:860:2: ( ( (lv_literals_0_0= ruleLiteral ) ) (otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) ) )* )
+            // InternalProblem.g:861:3: ( (lv_literals_0_0= ruleLiteral ) ) (otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) ) )*
+            {
+            // InternalProblem.g:861:3: ( (lv_literals_0_0= ruleLiteral ) )
+            // InternalProblem.g:862:4: (lv_literals_0_0= ruleLiteral )
+            {
+            // InternalProblem.g:862:4: (lv_literals_0_0= ruleLiteral )
+            // InternalProblem.g:863:5: lv_literals_0_0= ruleLiteral
+            {
+
+                                                newCompositeNode(grammarAccess.getConjunctionAccess().getLiteralsLiteralParserRuleCall_0_0());
+                                        
+            pushFollow(FOLLOW_27);
+            lv_literals_0_0=ruleLiteral();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getConjunctionRule());
+                                                }
+                                                add(
+                                                        current,
+                                                        "literals",
+                                                        lv_literals_0_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Literal");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:880:3: (otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) ) )*
+            loop24:
+            do {
+                int alt24=2;
+                int LA24_0 = input.LA(1);
+
+                if ( (LA24_0==17) ) {
+                    alt24=1;
+                }
+
+
+                switch (alt24) {
+                case 1 :
+                    // InternalProblem.g:881:4: otherlv_1= ',' ( (lv_literals_2_0= ruleLiteral ) )
+                    {
+                    otherlv_1=(Token)match(input,17,FOLLOW_25); 
+
+                                                newLeafNode(otherlv_1, grammarAccess.getConjunctionAccess().getCommaKeyword_1_0());
+                                        
+                    // InternalProblem.g:885:4: ( (lv_literals_2_0= ruleLiteral ) )
+                    // InternalProblem.g:886:5: (lv_literals_2_0= ruleLiteral )
+                    {
+                    // InternalProblem.g:886:5: (lv_literals_2_0= ruleLiteral )
+                    // InternalProblem.g:887:6: lv_literals_2_0= ruleLiteral
+                    {
+
+                                                                newCompositeNode(grammarAccess.getConjunctionAccess().getLiteralsLiteralParserRuleCall_1_1_0());
+                                                        
+                    pushFollow(FOLLOW_27);
+                    lv_literals_2_0=ruleLiteral();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getConjunctionRule());
+                                                                }
+                                                                add(
+                                                                        current,
+                                                                        "literals",
+                                                                        lv_literals_2_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.Literal");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+
+                default :
+                    break loop24;
+                }
+            } while (true);
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleConjunction"
+
+
+    // $ANTLR start "entryRuleLiteral"
+    // InternalProblem.g:909:1: entryRuleLiteral returns [EObject current=null] : iv_ruleLiteral= ruleLiteral EOF ;
+    public final EObject entryRuleLiteral() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleLiteral = null;
+
+
+        try {
+            // InternalProblem.g:909:48: (iv_ruleLiteral= ruleLiteral EOF )
+            // InternalProblem.g:910:2: iv_ruleLiteral= ruleLiteral EOF
+            {
+             newCompositeNode(grammarAccess.getLiteralRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleLiteral=ruleLiteral();
+
+            state._fsp--;
+
+             current =iv_ruleLiteral; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleLiteral"
+
+
+    // $ANTLR start "ruleLiteral"
+    // InternalProblem.g:916:1: ruleLiteral returns [EObject current=null] : (this_Atom_0= ruleAtom | this_NegativeLiteral_1= ruleNegativeLiteral ) ;
+    public final EObject ruleLiteral() throws RecognitionException {
+        EObject current = null;
+
+        EObject this_Atom_0 = null;
+
+        EObject this_NegativeLiteral_1 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:922:2: ( (this_Atom_0= ruleAtom | this_NegativeLiteral_1= ruleNegativeLiteral ) )
+            // InternalProblem.g:923:2: (this_Atom_0= ruleAtom | this_NegativeLiteral_1= ruleNegativeLiteral )
+            {
+            // InternalProblem.g:923:2: (this_Atom_0= ruleAtom | this_NegativeLiteral_1= ruleNegativeLiteral )
+            int alt25=2;
+            int LA25_0 = input.LA(1);
+
+            if ( (LA25_0==RULE_ID||LA25_0==RULE_QUOTED_ID||(LA25_0>=40 && LA25_0<=41)) ) {
+                alt25=1;
+            }
+            else if ( (LA25_0==32) ) {
+                alt25=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 25, 0, input);
+
+                throw nvae;
+            }
+            switch (alt25) {
+                case 1 :
+                    // InternalProblem.g:924:3: this_Atom_0= ruleAtom
+                    {
+
+                                        newCompositeNode(grammarAccess.getLiteralAccess().getAtomParserRuleCall_0());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_Atom_0=ruleAtom();
+
+                    state._fsp--;
+
+
+                                        current = this_Atom_0;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:933:3: this_NegativeLiteral_1= ruleNegativeLiteral
+                    {
+
+                                        newCompositeNode(grammarAccess.getLiteralAccess().getNegativeLiteralParserRuleCall_1());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_NegativeLiteral_1=ruleNegativeLiteral();
+
+                    state._fsp--;
+
+
+                                        current = this_NegativeLiteral_1;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleLiteral"
+
+
+    // $ANTLR start "entryRuleNegativeLiteral"
+    // InternalProblem.g:945:1: entryRuleNegativeLiteral returns [EObject current=null] : iv_ruleNegativeLiteral= ruleNegativeLiteral EOF ;
+    public final EObject entryRuleNegativeLiteral() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleNegativeLiteral = null;
+
+
+        try {
+            // InternalProblem.g:945:56: (iv_ruleNegativeLiteral= ruleNegativeLiteral EOF )
+            // InternalProblem.g:946:2: iv_ruleNegativeLiteral= ruleNegativeLiteral EOF
+            {
+             newCompositeNode(grammarAccess.getNegativeLiteralRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleNegativeLiteral=ruleNegativeLiteral();
+
+            state._fsp--;
+
+             current =iv_ruleNegativeLiteral; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleNegativeLiteral"
+
+
+    // $ANTLR start "ruleNegativeLiteral"
+    // InternalProblem.g:952:1: ruleNegativeLiteral returns [EObject current=null] : (otherlv_0= '!' ( (lv_atom_1_0= ruleAtom ) ) ) ;
+    public final EObject ruleNegativeLiteral() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_0=null;
+        EObject lv_atom_1_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:958:2: ( (otherlv_0= '!' ( (lv_atom_1_0= ruleAtom ) ) ) )
+            // InternalProblem.g:959:2: (otherlv_0= '!' ( (lv_atom_1_0= ruleAtom ) ) )
+            {
+            // InternalProblem.g:959:2: (otherlv_0= '!' ( (lv_atom_1_0= ruleAtom ) ) )
+            // InternalProblem.g:960:3: otherlv_0= '!' ( (lv_atom_1_0= ruleAtom ) )
+            {
+            otherlv_0=(Token)match(input,32,FOLLOW_8); 
+
+                                newLeafNode(otherlv_0, grammarAccess.getNegativeLiteralAccess().getExclamationMarkKeyword_0());
+                        
+            // InternalProblem.g:964:3: ( (lv_atom_1_0= ruleAtom ) )
+            // InternalProblem.g:965:4: (lv_atom_1_0= ruleAtom )
+            {
+            // InternalProblem.g:965:4: (lv_atom_1_0= ruleAtom )
+            // InternalProblem.g:966:5: lv_atom_1_0= ruleAtom
+            {
+
+                                                newCompositeNode(grammarAccess.getNegativeLiteralAccess().getAtomAtomParserRuleCall_1_0());
+                                        
+            pushFollow(FOLLOW_2);
+            lv_atom_1_0=ruleAtom();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getNegativeLiteralRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "atom",
+                                                        lv_atom_1_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.Atom");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleNegativeLiteral"
+
+
+    // $ANTLR start "entryRuleAtom"
+    // InternalProblem.g:987:1: entryRuleAtom returns [EObject current=null] : iv_ruleAtom= ruleAtom EOF ;
+    public final EObject entryRuleAtom() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleAtom = null;
+
+
+        try {
+            // InternalProblem.g:987:45: (iv_ruleAtom= ruleAtom EOF )
+            // InternalProblem.g:988:2: iv_ruleAtom= ruleAtom EOF
+            {
+             newCompositeNode(grammarAccess.getAtomRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleAtom=ruleAtom();
+
+            state._fsp--;
+
+             current =iv_ruleAtom; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleAtom"
+
+
+    // $ANTLR start "ruleAtom"
+    // InternalProblem.g:994:1: ruleAtom returns [EObject current=null] : ( ( ( ruleQualifiedName ) ) ( (lv_transitiveClosure_1_0= '+' ) )? otherlv_2= '(' ( ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )* )? otherlv_6= ')' ) ;
+    public final EObject ruleAtom() throws RecognitionException {
+        EObject current = null;
+
+        Token lv_transitiveClosure_1_0=null;
+        Token otherlv_2=null;
+        Token otherlv_4=null;
+        Token otherlv_6=null;
+        EObject lv_arguments_3_0 = null;
+
+        EObject lv_arguments_5_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1000:2: ( ( ( ( ruleQualifiedName ) ) ( (lv_transitiveClosure_1_0= '+' ) )? otherlv_2= '(' ( ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )* )? otherlv_6= ')' ) )
+            // InternalProblem.g:1001:2: ( ( ( ruleQualifiedName ) ) ( (lv_transitiveClosure_1_0= '+' ) )? otherlv_2= '(' ( ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )* )? otherlv_6= ')' )
+            {
+            // InternalProblem.g:1001:2: ( ( ( ruleQualifiedName ) ) ( (lv_transitiveClosure_1_0= '+' ) )? otherlv_2= '(' ( ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )* )? otherlv_6= ')' )
+            // InternalProblem.g:1002:3: ( ( ruleQualifiedName ) ) ( (lv_transitiveClosure_1_0= '+' ) )? otherlv_2= '(' ( ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )* )? otherlv_6= ')'
+            {
+            // InternalProblem.g:1002:3: ( ( ruleQualifiedName ) )
+            // InternalProblem.g:1003:4: ( ruleQualifiedName )
+            {
+            // InternalProblem.g:1003:4: ( ruleQualifiedName )
+            // InternalProblem.g:1004:5: ruleQualifiedName
+            {
+
+                                                if (current==null) {
+                                                        current = createModelElement(grammarAccess.getAtomRule());
+                                                }
+                                        
+
+                                                newCompositeNode(grammarAccess.getAtomAccess().getRelationRelationCrossReference_0_0());
+                                        
+            pushFollow(FOLLOW_28);
+            ruleQualifiedName();
+
+            state._fsp--;
+
+
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:1018:3: ( (lv_transitiveClosure_1_0= '+' ) )?
+            int alt26=2;
+            int LA26_0 = input.LA(1);
+
+            if ( (LA26_0==33) ) {
+                alt26=1;
+            }
+            switch (alt26) {
+                case 1 :
+                    // InternalProblem.g:1019:4: (lv_transitiveClosure_1_0= '+' )
+                    {
+                    // InternalProblem.g:1019:4: (lv_transitiveClosure_1_0= '+' )
+                    // InternalProblem.g:1020:5: lv_transitiveClosure_1_0= '+'
+                    {
+                    lv_transitiveClosure_1_0=(Token)match(input,33,FOLLOW_21); 
+
+                                                        newLeafNode(lv_transitiveClosure_1_0, grammarAccess.getAtomAccess().getTransitiveClosurePlusSignKeyword_1_0());
+                                                
+
+                                                        if (current==null) {
+                                                                current = createModelElement(grammarAccess.getAtomRule());
+                                                        }
+                                                        setWithLastConsumed(current, "transitiveClosure", lv_transitiveClosure_1_0 != null, "+");
+                                                
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+            otherlv_2=(Token)match(input,29,FOLLOW_22); 
+
+                                newLeafNode(otherlv_2, grammarAccess.getAtomAccess().getLeftParenthesisKeyword_2());
+                        
+            // InternalProblem.g:1036:3: ( ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )* )?
+            int alt28=2;
+            int LA28_0 = input.LA(1);
+
+            if ( (LA28_0==RULE_ID||LA28_0==RULE_QUOTED_ID||(LA28_0>=40 && LA28_0<=41)) ) {
+                alt28=1;
+            }
+            switch (alt28) {
+                case 1 :
+                    // InternalProblem.g:1037:4: ( (lv_arguments_3_0= ruleArgument ) ) (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )*
+                    {
+                    // InternalProblem.g:1037:4: ( (lv_arguments_3_0= ruleArgument ) )
+                    // InternalProblem.g:1038:5: (lv_arguments_3_0= ruleArgument )
+                    {
+                    // InternalProblem.g:1038:5: (lv_arguments_3_0= ruleArgument )
+                    // InternalProblem.g:1039:6: lv_arguments_3_0= ruleArgument
+                    {
+
+                                                                newCompositeNode(grammarAccess.getAtomAccess().getArgumentsArgumentParserRuleCall_3_0_0());
+                                                        
+                    pushFollow(FOLLOW_23);
+                    lv_arguments_3_0=ruleArgument();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getAtomRule());
+                                                                }
+                                                                add(
+                                                                        current,
+                                                                        "arguments",
+                                                                        lv_arguments_3_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.Argument");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+                    // InternalProblem.g:1056:4: (otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) ) )*
+                    loop27:
+                    do {
+                        int alt27=2;
+                        int LA27_0 = input.LA(1);
+
+                        if ( (LA27_0==17) ) {
+                            alt27=1;
+                        }
+
+
+                        switch (alt27) {
+                        case 1 :
+                            // InternalProblem.g:1057:5: otherlv_4= ',' ( (lv_arguments_5_0= ruleArgument ) )
+                            {
+                            otherlv_4=(Token)match(input,17,FOLLOW_8); 
+
+                                                                newLeafNode(otherlv_4, grammarAccess.getAtomAccess().getCommaKeyword_3_1_0());
+                                                        
+                            // InternalProblem.g:1061:5: ( (lv_arguments_5_0= ruleArgument ) )
+                            // InternalProblem.g:1062:6: (lv_arguments_5_0= ruleArgument )
+                            {
+                            // InternalProblem.g:1062:6: (lv_arguments_5_0= ruleArgument )
+                            // InternalProblem.g:1063:7: lv_arguments_5_0= ruleArgument
+                            {
+
+                                                                                newCompositeNode(grammarAccess.getAtomAccess().getArgumentsArgumentParserRuleCall_3_1_1_0());
+                                                                        
+                            pushFollow(FOLLOW_23);
+                            lv_arguments_5_0=ruleArgument();
+
+                            state._fsp--;
+
+
+                                                                                if (current==null) {
+                                                                                        current = createModelElementForParent(grammarAccess.getAtomRule());
+                                                                                }
+                                                                                add(
+                                                                                        current,
+                                                                                        "arguments",
+                                                                                        lv_arguments_5_0,
+                                                                                        "org.eclipse.viatra.solver.language.Problem.Argument");
+                                                                                afterParserOrEnumRuleCall();
+                                                                        
+
+                            }
+
+
+                            }
+
+
+                            }
+                            break;
+
+                        default :
+                            break loop27;
+                        }
+                    } while (true);
+
+
+                    }
+                    break;
+
+            }
+
+            otherlv_6=(Token)match(input,30,FOLLOW_2); 
+
+                                newLeafNode(otherlv_6, grammarAccess.getAtomAccess().getRightParenthesisKeyword_4());
+                        
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleAtom"
+
+
+    // $ANTLR start "entryRuleArgument"
+    // InternalProblem.g:1090:1: entryRuleArgument returns [EObject current=null] : iv_ruleArgument= ruleArgument EOF ;
+    public final EObject entryRuleArgument() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleArgument = null;
+
+
+        try {
+            // InternalProblem.g:1090:49: (iv_ruleArgument= ruleArgument EOF )
+            // InternalProblem.g:1091:2: iv_ruleArgument= ruleArgument EOF
+            {
+             newCompositeNode(grammarAccess.getArgumentRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleArgument=ruleArgument();
+
+            state._fsp--;
+
+             current =iv_ruleArgument; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleArgument"
+
+
+    // $ANTLR start "ruleArgument"
+    // InternalProblem.g:1097:1: ruleArgument returns [EObject current=null] : ( ( ruleQualifiedName ) ) ;
+    public final EObject ruleArgument() throws RecognitionException {
+        EObject current = null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1103:2: ( ( ( ruleQualifiedName ) ) )
+            // InternalProblem.g:1104:2: ( ( ruleQualifiedName ) )
+            {
+            // InternalProblem.g:1104:2: ( ( ruleQualifiedName ) )
+            // InternalProblem.g:1105:3: ( ruleQualifiedName )
+            {
+            // InternalProblem.g:1105:3: ( ruleQualifiedName )
+            // InternalProblem.g:1106:4: ruleQualifiedName
+            {
+
+                                        if (current==null) {
+                                                current = createModelElement(grammarAccess.getArgumentRule());
+                                        }
+                                
+
+                                        newCompositeNode(grammarAccess.getArgumentAccess().getVariableOrNodeVariableOrNodeCrossReference_0());
+                                
+            pushFollow(FOLLOW_2);
+            ruleQualifiedName();
+
+            state._fsp--;
+
+
+                                        afterParserOrEnumRuleCall();
+                                
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleArgument"
+
+
+    // $ANTLR start "entryRuleAssertion"
+    // InternalProblem.g:1123:1: entryRuleAssertion returns [EObject current=null] : iv_ruleAssertion= ruleAssertion EOF ;
+    public final EObject entryRuleAssertion() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleAssertion = null;
+
+
+        try {
+            // InternalProblem.g:1123:50: (iv_ruleAssertion= ruleAssertion EOF )
+            // InternalProblem.g:1124:2: iv_ruleAssertion= ruleAssertion EOF
+            {
+             newCompositeNode(grammarAccess.getAssertionRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleAssertion=ruleAssertion();
+
+            state._fsp--;
+
+             current =iv_ruleAssertion; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleAssertion"
+
+
+    // $ANTLR start "ruleAssertion"
+    // InternalProblem.g:1130:1: ruleAssertion returns [EObject current=null] : ( ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) ) otherlv_15= '.' ) ;
+    public final EObject ruleAssertion() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_1=null;
+        Token otherlv_3=null;
+        Token otherlv_5=null;
+        Token otherlv_6=null;
+        Token otherlv_10=null;
+        Token otherlv_12=null;
+        Token otherlv_14=null;
+        Token otherlv_15=null;
+        Enumerator lv_value_7_0 = null;
+
+        Enumerator lv_value_8_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1136:2: ( ( ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) ) otherlv_15= '.' ) )
+            // InternalProblem.g:1137:2: ( ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) ) otherlv_15= '.' )
+            {
+            // InternalProblem.g:1137:2: ( ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) ) otherlv_15= '.' )
+            // InternalProblem.g:1138:3: ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) ) otherlv_15= '.'
+            {
+            // InternalProblem.g:1138:3: ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) )
+            int alt34=2;
+            alt34 = dfa34.predict(input);
+            switch (alt34) {
+                case 1 :
+                    // InternalProblem.g:1139:4: ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) )
+                    {
+                    // InternalProblem.g:1139:4: ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) )
+                    // InternalProblem.g:1140:5: ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) )
+                    {
+                    // InternalProblem.g:1140:5: ( ( ruleQualifiedName ) )
+                    // InternalProblem.g:1141:6: ( ruleQualifiedName )
+                    {
+                    // InternalProblem.g:1141:6: ( ruleQualifiedName )
+                    // InternalProblem.g:1142:7: ruleQualifiedName
+                    {
+
+                                                                        if (current==null) {
+                                                                                current = createModelElement(grammarAccess.getAssertionRule());
+                                                                        }
+                                                                
+
+                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getRelationRelationCrossReference_0_0_0_0());
+                                                                
+                    pushFollow(FOLLOW_21);
+                    ruleQualifiedName();
+
+                    state._fsp--;
+
+
+                                                                        afterParserOrEnumRuleCall();
+                                                                
+
+                    }
+
+
+                    }
+
+                    otherlv_1=(Token)match(input,29,FOLLOW_22); 
+
+                                                        newLeafNode(otherlv_1, grammarAccess.getAssertionAccess().getLeftParenthesisKeyword_0_0_1());
+                                                
+                    // InternalProblem.g:1160:5: ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )?
+                    int alt30=2;
+                    int LA30_0 = input.LA(1);
+
+                    if ( (LA30_0==RULE_ID||LA30_0==RULE_QUOTED_ID||(LA30_0>=40 && LA30_0<=41)) ) {
+                        alt30=1;
+                    }
+                    switch (alt30) {
+                        case 1 :
+                            // InternalProblem.g:1161:6: ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )*
+                            {
+                            // InternalProblem.g:1161:6: ( ( ruleQualifiedName ) )
+                            // InternalProblem.g:1162:7: ( ruleQualifiedName )
+                            {
+                            // InternalProblem.g:1162:7: ( ruleQualifiedName )
+                            // InternalProblem.g:1163:8: ruleQualifiedName
+                            {
+
+                                                                                        if (current==null) {
+                                                                                                current = createModelElement(grammarAccess.getAssertionRule());
+                                                                                        }
+                                                                                
+
+                                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_0_2_0_0());
+                                                                                
+                            pushFollow(FOLLOW_23);
+                            ruleQualifiedName();
+
+                            state._fsp--;
+
+
+                                                                                        afterParserOrEnumRuleCall();
+                                                                                
+
+                            }
+
+
+                            }
+
+                            // InternalProblem.g:1177:6: (otherlv_3= ',' ( ( ruleQualifiedName ) ) )*
+                            loop29:
+                            do {
+                                int alt29=2;
+                                int LA29_0 = input.LA(1);
+
+                                if ( (LA29_0==17) ) {
+                                    alt29=1;
+                                }
+
+
+                                switch (alt29) {
+                                case 1 :
+                                    // InternalProblem.g:1178:7: otherlv_3= ',' ( ( ruleQualifiedName ) )
+                                    {
+                                    otherlv_3=(Token)match(input,17,FOLLOW_8); 
+
+                                                                                        newLeafNode(otherlv_3, grammarAccess.getAssertionAccess().getCommaKeyword_0_0_2_1_0());
+                                                                                
+                                    // InternalProblem.g:1182:7: ( ( ruleQualifiedName ) )
+                                    // InternalProblem.g:1183:8: ( ruleQualifiedName )
+                                    {
+                                    // InternalProblem.g:1183:8: ( ruleQualifiedName )
+                                    // InternalProblem.g:1184:9: ruleQualifiedName
+                                    {
+
+                                                                                                        if (current==null) {
+                                                                                                                current = createModelElement(grammarAccess.getAssertionRule());
+                                                                                                        }
+                                                                                                
+
+                                                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_0_2_1_1_0());
+                                                                                                
+                                    pushFollow(FOLLOW_23);
+                                    ruleQualifiedName();
+
+                                    state._fsp--;
+
+
+                                                                                                        afterParserOrEnumRuleCall();
+                                                                                                
+
+                                    }
+
+
+                                    }
+
+
+                                    }
+                                    break;
+
+                                default :
+                                    break loop29;
+                                }
+                            } while (true);
+
+
+                            }
+                            break;
+
+                    }
+
+                    otherlv_5=(Token)match(input,30,FOLLOW_29); 
+
+                                                        newLeafNode(otherlv_5, grammarAccess.getAssertionAccess().getRightParenthesisKeyword_0_0_3());
+                                                
+                    otherlv_6=(Token)match(input,34,FOLLOW_30); 
+
+                                                        newLeafNode(otherlv_6, grammarAccess.getAssertionAccess().getColonKeyword_0_0_4());
+                                                
+                    // InternalProblem.g:1208:5: ( (lv_value_7_0= ruleLogicValue ) )
+                    // InternalProblem.g:1209:6: (lv_value_7_0= ruleLogicValue )
+                    {
+                    // InternalProblem.g:1209:6: (lv_value_7_0= ruleLogicValue )
+                    // InternalProblem.g:1210:7: lv_value_7_0= ruleLogicValue
+                    {
+
+                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getValueLogicValueEnumRuleCall_0_0_5_0());
+                                                                
+                    pushFollow(FOLLOW_4);
+                    lv_value_7_0=ruleLogicValue();
+
+                    state._fsp--;
+
+
+                                                                        if (current==null) {
+                                                                                current = createModelElementForParent(grammarAccess.getAssertionRule());
+                                                                        }
+                                                                        set(
+                                                                                current,
+                                                                                "value",
+                                                                                lv_value_7_0,
+                                                                                "org.eclipse.viatra.solver.language.Problem.LogicValue");
+                                                                        afterParserOrEnumRuleCall();
+                                                                
+
+                    }
+
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1229:4: ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' )
+                    {
+                    // InternalProblem.g:1229:4: ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' )
+                    // InternalProblem.g:1230:5: ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')'
+                    {
+                    // InternalProblem.g:1230:5: ( (lv_value_8_0= ruleShortLogicValue ) )?
+                    int alt31=2;
+                    int LA31_0 = input.LA(1);
+
+                    if ( (LA31_0==32||LA31_0==43) ) {
+                        alt31=1;
+                    }
+                    switch (alt31) {
+                        case 1 :
+                            // InternalProblem.g:1231:6: (lv_value_8_0= ruleShortLogicValue )
+                            {
+                            // InternalProblem.g:1231:6: (lv_value_8_0= ruleShortLogicValue )
+                            // InternalProblem.g:1232:7: lv_value_8_0= ruleShortLogicValue
+                            {
+
+                                                                                newCompositeNode(grammarAccess.getAssertionAccess().getValueShortLogicValueEnumRuleCall_0_1_0_0());
+                                                                        
+                            pushFollow(FOLLOW_8);
+                            lv_value_8_0=ruleShortLogicValue();
+
+                            state._fsp--;
+
+
+                                                                                if (current==null) {
+                                                                                        current = createModelElementForParent(grammarAccess.getAssertionRule());
+                                                                                }
+                                                                                set(
+                                                                                        current,
+                                                                                        "value",
+                                                                                        lv_value_8_0,
+                                                                                        "org.eclipse.viatra.solver.language.Problem.ShortLogicValue");
+                                                                                afterParserOrEnumRuleCall();
+                                                                        
+
+                            }
+
+
+                            }
+                            break;
+
+                    }
+
+                    // InternalProblem.g:1249:5: ( ( ruleQualifiedName ) )
+                    // InternalProblem.g:1250:6: ( ruleQualifiedName )
+                    {
+                    // InternalProblem.g:1250:6: ( ruleQualifiedName )
+                    // InternalProblem.g:1251:7: ruleQualifiedName
+                    {
+
+                                                                        if (current==null) {
+                                                                                current = createModelElement(grammarAccess.getAssertionRule());
+                                                                        }
+                                                                
+
+                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getRelationRelationCrossReference_0_1_1_0());
+                                                                
+                    pushFollow(FOLLOW_21);
+                    ruleQualifiedName();
+
+                    state._fsp--;
+
+
+                                                                        afterParserOrEnumRuleCall();
+                                                                
+
+                    }
+
+
+                    }
+
+                    otherlv_10=(Token)match(input,29,FOLLOW_22); 
+
+                                                        newLeafNode(otherlv_10, grammarAccess.getAssertionAccess().getLeftParenthesisKeyword_0_1_2());
+                                                
+                    // InternalProblem.g:1269:5: ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )?
+                    int alt33=2;
+                    int LA33_0 = input.LA(1);
+
+                    if ( (LA33_0==RULE_ID||LA33_0==RULE_QUOTED_ID||(LA33_0>=40 && LA33_0<=41)) ) {
+                        alt33=1;
+                    }
+                    switch (alt33) {
+                        case 1 :
+                            // InternalProblem.g:1270:6: ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )*
+                            {
+                            // InternalProblem.g:1270:6: ( ( ruleQualifiedName ) )
+                            // InternalProblem.g:1271:7: ( ruleQualifiedName )
+                            {
+                            // InternalProblem.g:1271:7: ( ruleQualifiedName )
+                            // InternalProblem.g:1272:8: ruleQualifiedName
+                            {
+
+                                                                                        if (current==null) {
+                                                                                                current = createModelElement(grammarAccess.getAssertionRule());
+                                                                                        }
+                                                                                
+
+                                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_1_3_0_0());
+                                                                                
+                            pushFollow(FOLLOW_23);
+                            ruleQualifiedName();
+
+                            state._fsp--;
+
+
+                                                                                        afterParserOrEnumRuleCall();
+                                                                                
+
+                            }
+
+
+                            }
+
+                            // InternalProblem.g:1286:6: (otherlv_12= ',' ( ( ruleQualifiedName ) ) )*
+                            loop32:
+                            do {
+                                int alt32=2;
+                                int LA32_0 = input.LA(1);
+
+                                if ( (LA32_0==17) ) {
+                                    alt32=1;
+                                }
+
+
+                                switch (alt32) {
+                                case 1 :
+                                    // InternalProblem.g:1287:7: otherlv_12= ',' ( ( ruleQualifiedName ) )
+                                    {
+                                    otherlv_12=(Token)match(input,17,FOLLOW_8); 
+
+                                                                                        newLeafNode(otherlv_12, grammarAccess.getAssertionAccess().getCommaKeyword_0_1_3_1_0());
+                                                                                
+                                    // InternalProblem.g:1291:7: ( ( ruleQualifiedName ) )
+                                    // InternalProblem.g:1292:8: ( ruleQualifiedName )
+                                    {
+                                    // InternalProblem.g:1292:8: ( ruleQualifiedName )
+                                    // InternalProblem.g:1293:9: ruleQualifiedName
+                                    {
+
+                                                                                                        if (current==null) {
+                                                                                                                current = createModelElement(grammarAccess.getAssertionRule());
+                                                                                                        }
+                                                                                                
+
+                                                                                                        newCompositeNode(grammarAccess.getAssertionAccess().getArgumentsNodeCrossReference_0_1_3_1_1_0());
+                                                                                                
+                                    pushFollow(FOLLOW_23);
+                                    ruleQualifiedName();
+
+                                    state._fsp--;
+
+
+                                                                                                        afterParserOrEnumRuleCall();
+                                                                                                
+
+                                    }
+
+
+                                    }
+
+
+                                    }
+                                    break;
+
+                                default :
+                                    break loop32;
+                                }
+                            } while (true);
+
+
+                            }
+                            break;
+
+                    }
+
+                    otherlv_14=(Token)match(input,30,FOLLOW_4); 
+
+                                                        newLeafNode(otherlv_14, grammarAccess.getAssertionAccess().getRightParenthesisKeyword_0_1_4());
+                                                
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+            otherlv_15=(Token)match(input,13,FOLLOW_2); 
+
+                                newLeafNode(otherlv_15, grammarAccess.getAssertionAccess().getFullStopKeyword_1());
+                        
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleAssertion"
+
+
+    // $ANTLR start "entryRuleScopeDeclaration"
+    // InternalProblem.g:1323:1: entryRuleScopeDeclaration returns [EObject current=null] : iv_ruleScopeDeclaration= ruleScopeDeclaration EOF ;
+    public final EObject entryRuleScopeDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleScopeDeclaration = null;
+
+
+        try {
+            // InternalProblem.g:1323:57: (iv_ruleScopeDeclaration= ruleScopeDeclaration EOF )
+            // InternalProblem.g:1324:2: iv_ruleScopeDeclaration= ruleScopeDeclaration EOF
+            {
+             newCompositeNode(grammarAccess.getScopeDeclarationRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleScopeDeclaration=ruleScopeDeclaration();
+
+            state._fsp--;
+
+             current =iv_ruleScopeDeclaration; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleScopeDeclaration"
+
+
+    // $ANTLR start "ruleScopeDeclaration"
+    // InternalProblem.g:1330:1: ruleScopeDeclaration returns [EObject current=null] : (otherlv_0= 'scope' ( (lv_typeScopes_1_0= ruleTypeScope ) ) (otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) ) )* otherlv_4= '.' ) ;
+    public final EObject ruleScopeDeclaration() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_0=null;
+        Token otherlv_2=null;
+        Token otherlv_4=null;
+        EObject lv_typeScopes_1_0 = null;
+
+        EObject lv_typeScopes_3_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1336:2: ( (otherlv_0= 'scope' ( (lv_typeScopes_1_0= ruleTypeScope ) ) (otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) ) )* otherlv_4= '.' ) )
+            // InternalProblem.g:1337:2: (otherlv_0= 'scope' ( (lv_typeScopes_1_0= ruleTypeScope ) ) (otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) ) )* otherlv_4= '.' )
+            {
+            // InternalProblem.g:1337:2: (otherlv_0= 'scope' ( (lv_typeScopes_1_0= ruleTypeScope ) ) (otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) ) )* otherlv_4= '.' )
+            // InternalProblem.g:1338:3: otherlv_0= 'scope' ( (lv_typeScopes_1_0= ruleTypeScope ) ) (otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) ) )* otherlv_4= '.'
+            {
+            otherlv_0=(Token)match(input,35,FOLLOW_31); 
+
+                                newLeafNode(otherlv_0, grammarAccess.getScopeDeclarationAccess().getScopeKeyword_0());
+                        
+            // InternalProblem.g:1342:3: ( (lv_typeScopes_1_0= ruleTypeScope ) )
+            // InternalProblem.g:1343:4: (lv_typeScopes_1_0= ruleTypeScope )
+            {
+            // InternalProblem.g:1343:4: (lv_typeScopes_1_0= ruleTypeScope )
+            // InternalProblem.g:1344:5: lv_typeScopes_1_0= ruleTypeScope
+            {
+
+                                                newCompositeNode(grammarAccess.getScopeDeclarationAccess().getTypeScopesTypeScopeParserRuleCall_1_0());
+                                        
+            pushFollow(FOLLOW_32);
+            lv_typeScopes_1_0=ruleTypeScope();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getScopeDeclarationRule());
+                                                }
+                                                add(
+                                                        current,
+                                                        "typeScopes",
+                                                        lv_typeScopes_1_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.TypeScope");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:1361:3: (otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) ) )*
+            loop35:
+            do {
+                int alt35=2;
+                int LA35_0 = input.LA(1);
+
+                if ( (LA35_0==17) ) {
+                    alt35=1;
+                }
+
+
+                switch (alt35) {
+                case 1 :
+                    // InternalProblem.g:1362:4: otherlv_2= ',' ( (lv_typeScopes_3_0= ruleTypeScope ) )
+                    {
+                    otherlv_2=(Token)match(input,17,FOLLOW_31); 
+
+                                                newLeafNode(otherlv_2, grammarAccess.getScopeDeclarationAccess().getCommaKeyword_2_0());
+                                        
+                    // InternalProblem.g:1366:4: ( (lv_typeScopes_3_0= ruleTypeScope ) )
+                    // InternalProblem.g:1367:5: (lv_typeScopes_3_0= ruleTypeScope )
+                    {
+                    // InternalProblem.g:1367:5: (lv_typeScopes_3_0= ruleTypeScope )
+                    // InternalProblem.g:1368:6: lv_typeScopes_3_0= ruleTypeScope
+                    {
+
+                                                                newCompositeNode(grammarAccess.getScopeDeclarationAccess().getTypeScopesTypeScopeParserRuleCall_2_1_0());
+                                                        
+                    pushFollow(FOLLOW_32);
+                    lv_typeScopes_3_0=ruleTypeScope();
+
+                    state._fsp--;
+
+
+                                                                if (current==null) {
+                                                                        current = createModelElementForParent(grammarAccess.getScopeDeclarationRule());
+                                                                }
+                                                                add(
+                                                                        current,
+                                                                        "typeScopes",
+                                                                        lv_typeScopes_3_0,
+                                                                        "org.eclipse.viatra.solver.language.Problem.TypeScope");
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+
+                default :
+                    break loop35;
+                }
+            } while (true);
+
+            otherlv_4=(Token)match(input,13,FOLLOW_2); 
+
+                                newLeafNode(otherlv_4, grammarAccess.getScopeDeclarationAccess().getFullStopKeyword_3());
+                        
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleScopeDeclaration"
+
+
+    // $ANTLR start "entryRuleTypeScope"
+    // InternalProblem.g:1394:1: entryRuleTypeScope returns [EObject current=null] : iv_ruleTypeScope= ruleTypeScope EOF ;
+    public final EObject entryRuleTypeScope() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleTypeScope = null;
+
+
+        try {
+            // InternalProblem.g:1394:50: (iv_ruleTypeScope= ruleTypeScope EOF )
+            // InternalProblem.g:1395:2: iv_ruleTypeScope= ruleTypeScope EOF
+            {
+             newCompositeNode(grammarAccess.getTypeScopeRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleTypeScope=ruleTypeScope();
+
+            state._fsp--;
+
+             current =iv_ruleTypeScope; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleTypeScope"
+
+
+    // $ANTLR start "ruleTypeScope"
+    // InternalProblem.g:1401:1: ruleTypeScope returns [EObject current=null] : ( ( (otherlv_0= RULE_ID ) ) ( ( (lv_increment_1_0= '+=' ) ) | otherlv_2= '=' ) ( (lv_multiplicity_3_0= ruleDefiniteMultiplicity ) ) ) ;
+    public final EObject ruleTypeScope() throws RecognitionException {
+        EObject current = null;
+
+        Token otherlv_0=null;
+        Token lv_increment_1_0=null;
+        Token otherlv_2=null;
+        EObject lv_multiplicity_3_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1407:2: ( ( ( (otherlv_0= RULE_ID ) ) ( ( (lv_increment_1_0= '+=' ) ) | otherlv_2= '=' ) ( (lv_multiplicity_3_0= ruleDefiniteMultiplicity ) ) ) )
+            // InternalProblem.g:1408:2: ( ( (otherlv_0= RULE_ID ) ) ( ( (lv_increment_1_0= '+=' ) ) | otherlv_2= '=' ) ( (lv_multiplicity_3_0= ruleDefiniteMultiplicity ) ) )
+            {
+            // InternalProblem.g:1408:2: ( ( (otherlv_0= RULE_ID ) ) ( ( (lv_increment_1_0= '+=' ) ) | otherlv_2= '=' ) ( (lv_multiplicity_3_0= ruleDefiniteMultiplicity ) ) )
+            // InternalProblem.g:1409:3: ( (otherlv_0= RULE_ID ) ) ( ( (lv_increment_1_0= '+=' ) ) | otherlv_2= '=' ) ( (lv_multiplicity_3_0= ruleDefiniteMultiplicity ) )
+            {
+            // InternalProblem.g:1409:3: ( (otherlv_0= RULE_ID ) )
+            // InternalProblem.g:1410:4: (otherlv_0= RULE_ID )
+            {
+            // InternalProblem.g:1410:4: (otherlv_0= RULE_ID )
+            // InternalProblem.g:1411:5: otherlv_0= RULE_ID
+            {
+
+                                                if (current==null) {
+                                                        current = createModelElement(grammarAccess.getTypeScopeRule());
+                                                }
+                                        
+            otherlv_0=(Token)match(input,RULE_ID,FOLLOW_33); 
+
+                                                newLeafNode(otherlv_0, grammarAccess.getTypeScopeAccess().getTargetTypeClassDeclarationCrossReference_0_0());
+                                        
+
+            }
+
+
+            }
+
+            // InternalProblem.g:1422:3: ( ( (lv_increment_1_0= '+=' ) ) | otherlv_2= '=' )
+            int alt36=2;
+            int LA36_0 = input.LA(1);
+
+            if ( (LA36_0==36) ) {
+                alt36=1;
+            }
+            else if ( (LA36_0==37) ) {
+                alt36=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 36, 0, input);
+
+                throw nvae;
+            }
+            switch (alt36) {
+                case 1 :
+                    // InternalProblem.g:1423:4: ( (lv_increment_1_0= '+=' ) )
+                    {
+                    // InternalProblem.g:1423:4: ( (lv_increment_1_0= '+=' ) )
+                    // InternalProblem.g:1424:5: (lv_increment_1_0= '+=' )
+                    {
+                    // InternalProblem.g:1424:5: (lv_increment_1_0= '+=' )
+                    // InternalProblem.g:1425:6: lv_increment_1_0= '+='
+                    {
+                    lv_increment_1_0=(Token)match(input,36,FOLLOW_17); 
+
+                                                                newLeafNode(lv_increment_1_0, grammarAccess.getTypeScopeAccess().getIncrementPlusSignEqualsSignKeyword_1_0_0());
+                                                        
+
+                                                                if (current==null) {
+                                                                        current = createModelElement(grammarAccess.getTypeScopeRule());
+                                                                }
+                                                                setWithLastConsumed(current, "increment", lv_increment_1_0 != null, "+=");
+                                                        
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1438:4: otherlv_2= '='
+                    {
+                    otherlv_2=(Token)match(input,37,FOLLOW_17); 
+
+                                                newLeafNode(otherlv_2, grammarAccess.getTypeScopeAccess().getEqualsSignKeyword_1_1());
+                                        
+
+                    }
+                    break;
+
+            }
+
+            // InternalProblem.g:1443:3: ( (lv_multiplicity_3_0= ruleDefiniteMultiplicity ) )
+            // InternalProblem.g:1444:4: (lv_multiplicity_3_0= ruleDefiniteMultiplicity )
+            {
+            // InternalProblem.g:1444:4: (lv_multiplicity_3_0= ruleDefiniteMultiplicity )
+            // InternalProblem.g:1445:5: lv_multiplicity_3_0= ruleDefiniteMultiplicity
+            {
+
+                                                newCompositeNode(grammarAccess.getTypeScopeAccess().getMultiplicityDefiniteMultiplicityParserRuleCall_2_0());
+                                        
+            pushFollow(FOLLOW_2);
+            lv_multiplicity_3_0=ruleDefiniteMultiplicity();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getTypeScopeRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "multiplicity",
+                                                        lv_multiplicity_3_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.DefiniteMultiplicity");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleTypeScope"
+
+
+    // $ANTLR start "entryRuleMultiplicity"
+    // InternalProblem.g:1466:1: entryRuleMultiplicity returns [EObject current=null] : iv_ruleMultiplicity= ruleMultiplicity EOF ;
+    public final EObject entryRuleMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleMultiplicity = null;
+
+
+        try {
+            // InternalProblem.g:1466:53: (iv_ruleMultiplicity= ruleMultiplicity EOF )
+            // InternalProblem.g:1467:2: iv_ruleMultiplicity= ruleMultiplicity EOF
+            {
+             newCompositeNode(grammarAccess.getMultiplicityRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleMultiplicity=ruleMultiplicity();
+
+            state._fsp--;
+
+             current =iv_ruleMultiplicity; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleMultiplicity"
+
+
+    // $ANTLR start "ruleMultiplicity"
+    // InternalProblem.g:1473:1: ruleMultiplicity returns [EObject current=null] : (this_UnboundedMultiplicity_0= ruleUnboundedMultiplicity | this_DefiniteMultiplicity_1= ruleDefiniteMultiplicity ) ;
+    public final EObject ruleMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject this_UnboundedMultiplicity_0 = null;
+
+        EObject this_DefiniteMultiplicity_1 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1479:2: ( (this_UnboundedMultiplicity_0= ruleUnboundedMultiplicity | this_DefiniteMultiplicity_1= ruleDefiniteMultiplicity ) )
+            // InternalProblem.g:1480:2: (this_UnboundedMultiplicity_0= ruleUnboundedMultiplicity | this_DefiniteMultiplicity_1= ruleDefiniteMultiplicity )
+            {
+            // InternalProblem.g:1480:2: (this_UnboundedMultiplicity_0= ruleUnboundedMultiplicity | this_DefiniteMultiplicity_1= ruleDefiniteMultiplicity )
+            int alt37=2;
+            int LA37_0 = input.LA(1);
+
+            if ( (LA37_0==EOF||LA37_0==25) ) {
+                alt37=1;
+            }
+            else if ( (LA37_0==RULE_INT) ) {
+                alt37=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 37, 0, input);
+
+                throw nvae;
+            }
+            switch (alt37) {
+                case 1 :
+                    // InternalProblem.g:1481:3: this_UnboundedMultiplicity_0= ruleUnboundedMultiplicity
+                    {
+
+                                        newCompositeNode(grammarAccess.getMultiplicityAccess().getUnboundedMultiplicityParserRuleCall_0());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_UnboundedMultiplicity_0=ruleUnboundedMultiplicity();
+
+                    state._fsp--;
+
+
+                                        current = this_UnboundedMultiplicity_0;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1490:3: this_DefiniteMultiplicity_1= ruleDefiniteMultiplicity
+                    {
+
+                                        newCompositeNode(grammarAccess.getMultiplicityAccess().getDefiniteMultiplicityParserRuleCall_1());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_DefiniteMultiplicity_1=ruleDefiniteMultiplicity();
+
+                    state._fsp--;
+
+
+                                        current = this_DefiniteMultiplicity_1;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleMultiplicity"
+
+
+    // $ANTLR start "entryRuleDefiniteMultiplicity"
+    // InternalProblem.g:1502:1: entryRuleDefiniteMultiplicity returns [EObject current=null] : iv_ruleDefiniteMultiplicity= ruleDefiniteMultiplicity EOF ;
+    public final EObject entryRuleDefiniteMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleDefiniteMultiplicity = null;
+
+
+        try {
+            // InternalProblem.g:1502:61: (iv_ruleDefiniteMultiplicity= ruleDefiniteMultiplicity EOF )
+            // InternalProblem.g:1503:2: iv_ruleDefiniteMultiplicity= ruleDefiniteMultiplicity EOF
+            {
+             newCompositeNode(grammarAccess.getDefiniteMultiplicityRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleDefiniteMultiplicity=ruleDefiniteMultiplicity();
+
+            state._fsp--;
+
+             current =iv_ruleDefiniteMultiplicity; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleDefiniteMultiplicity"
+
+
+    // $ANTLR start "ruleDefiniteMultiplicity"
+    // InternalProblem.g:1509:1: ruleDefiniteMultiplicity returns [EObject current=null] : (this_RangeMultiplicity_0= ruleRangeMultiplicity | this_ExactMultiplicity_1= ruleExactMultiplicity ) ;
+    public final EObject ruleDefiniteMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject this_RangeMultiplicity_0 = null;
+
+        EObject this_ExactMultiplicity_1 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1515:2: ( (this_RangeMultiplicity_0= ruleRangeMultiplicity | this_ExactMultiplicity_1= ruleExactMultiplicity ) )
+            // InternalProblem.g:1516:2: (this_RangeMultiplicity_0= ruleRangeMultiplicity | this_ExactMultiplicity_1= ruleExactMultiplicity )
+            {
+            // InternalProblem.g:1516:2: (this_RangeMultiplicity_0= ruleRangeMultiplicity | this_ExactMultiplicity_1= ruleExactMultiplicity )
+            int alt38=2;
+            int LA38_0 = input.LA(1);
+
+            if ( (LA38_0==RULE_INT) ) {
+                int LA38_1 = input.LA(2);
+
+                if ( (LA38_1==38) ) {
+                    alt38=1;
+                }
+                else if ( (LA38_1==EOF||LA38_1==13||LA38_1==17||LA38_1==25) ) {
+                    alt38=2;
+                }
+                else {
+                    NoViableAltException nvae =
+                        new NoViableAltException("", 38, 1, input);
+
+                    throw nvae;
+                }
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 38, 0, input);
+
+                throw nvae;
+            }
+            switch (alt38) {
+                case 1 :
+                    // InternalProblem.g:1517:3: this_RangeMultiplicity_0= ruleRangeMultiplicity
+                    {
+
+                                        newCompositeNode(grammarAccess.getDefiniteMultiplicityAccess().getRangeMultiplicityParserRuleCall_0());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_RangeMultiplicity_0=ruleRangeMultiplicity();
+
+                    state._fsp--;
+
+
+                                        current = this_RangeMultiplicity_0;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1526:3: this_ExactMultiplicity_1= ruleExactMultiplicity
+                    {
+
+                                        newCompositeNode(grammarAccess.getDefiniteMultiplicityAccess().getExactMultiplicityParserRuleCall_1());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_ExactMultiplicity_1=ruleExactMultiplicity();
+
+                    state._fsp--;
+
+
+                                        current = this_ExactMultiplicity_1;
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleDefiniteMultiplicity"
+
+
+    // $ANTLR start "entryRuleUnboundedMultiplicity"
+    // InternalProblem.g:1538:1: entryRuleUnboundedMultiplicity returns [EObject current=null] : iv_ruleUnboundedMultiplicity= ruleUnboundedMultiplicity EOF ;
+    public final EObject entryRuleUnboundedMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleUnboundedMultiplicity = null;
+
+
+        try {
+            // InternalProblem.g:1538:62: (iv_ruleUnboundedMultiplicity= ruleUnboundedMultiplicity EOF )
+            // InternalProblem.g:1539:2: iv_ruleUnboundedMultiplicity= ruleUnboundedMultiplicity EOF
+            {
+             newCompositeNode(grammarAccess.getUnboundedMultiplicityRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleUnboundedMultiplicity=ruleUnboundedMultiplicity();
+
+            state._fsp--;
+
+             current =iv_ruleUnboundedMultiplicity; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleUnboundedMultiplicity"
+
+
+    // $ANTLR start "ruleUnboundedMultiplicity"
+    // InternalProblem.g:1545:1: ruleUnboundedMultiplicity returns [EObject current=null] : () ;
+    public final EObject ruleUnboundedMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1551:2: ( () )
+            // InternalProblem.g:1552:2: ()
+            {
+            // InternalProblem.g:1552:2: ()
+            // InternalProblem.g:1553:3: 
+            {
+
+                                current = forceCreateModelElement(
+                                        grammarAccess.getUnboundedMultiplicityAccess().getUnboundedMultiplicityAction(),
+                                        current);
+                        
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleUnboundedMultiplicity"
+
+
+    // $ANTLR start "entryRuleRangeMultiplicity"
+    // InternalProblem.g:1562:1: entryRuleRangeMultiplicity returns [EObject current=null] : iv_ruleRangeMultiplicity= ruleRangeMultiplicity EOF ;
+    public final EObject entryRuleRangeMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleRangeMultiplicity = null;
+
+
+        try {
+            // InternalProblem.g:1562:58: (iv_ruleRangeMultiplicity= ruleRangeMultiplicity EOF )
+            // InternalProblem.g:1563:2: iv_ruleRangeMultiplicity= ruleRangeMultiplicity EOF
+            {
+             newCompositeNode(grammarAccess.getRangeMultiplicityRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleRangeMultiplicity=ruleRangeMultiplicity();
+
+            state._fsp--;
+
+             current =iv_ruleRangeMultiplicity; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleRangeMultiplicity"
+
+
+    // $ANTLR start "ruleRangeMultiplicity"
+    // InternalProblem.g:1569:1: ruleRangeMultiplicity returns [EObject current=null] : ( ( (lv_lowerBound_0_0= RULE_INT ) ) otherlv_1= '..' ( (lv_upperBound_2_0= ruleUpperBound ) ) ) ;
+    public final EObject ruleRangeMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        Token lv_lowerBound_0_0=null;
+        Token otherlv_1=null;
+        AntlrDatatypeRuleToken lv_upperBound_2_0 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1575:2: ( ( ( (lv_lowerBound_0_0= RULE_INT ) ) otherlv_1= '..' ( (lv_upperBound_2_0= ruleUpperBound ) ) ) )
+            // InternalProblem.g:1576:2: ( ( (lv_lowerBound_0_0= RULE_INT ) ) otherlv_1= '..' ( (lv_upperBound_2_0= ruleUpperBound ) ) )
+            {
+            // InternalProblem.g:1576:2: ( ( (lv_lowerBound_0_0= RULE_INT ) ) otherlv_1= '..' ( (lv_upperBound_2_0= ruleUpperBound ) ) )
+            // InternalProblem.g:1577:3: ( (lv_lowerBound_0_0= RULE_INT ) ) otherlv_1= '..' ( (lv_upperBound_2_0= ruleUpperBound ) )
+            {
+            // InternalProblem.g:1577:3: ( (lv_lowerBound_0_0= RULE_INT ) )
+            // InternalProblem.g:1578:4: (lv_lowerBound_0_0= RULE_INT )
+            {
+            // InternalProblem.g:1578:4: (lv_lowerBound_0_0= RULE_INT )
+            // InternalProblem.g:1579:5: lv_lowerBound_0_0= RULE_INT
+            {
+            lv_lowerBound_0_0=(Token)match(input,RULE_INT,FOLLOW_34); 
+
+                                                newLeafNode(lv_lowerBound_0_0, grammarAccess.getRangeMultiplicityAccess().getLowerBoundINTTerminalRuleCall_0_0());
+                                        
+
+                                                if (current==null) {
+                                                        current = createModelElement(grammarAccess.getRangeMultiplicityRule());
+                                                }
+                                                setWithLastConsumed(
+                                                        current,
+                                                        "lowerBound",
+                                                        lv_lowerBound_0_0,
+                                                        "org.eclipse.xtext.common.Terminals.INT");
+                                        
+
+            }
+
+
+            }
+
+            otherlv_1=(Token)match(input,38,FOLLOW_35); 
+
+                                newLeafNode(otherlv_1, grammarAccess.getRangeMultiplicityAccess().getFullStopFullStopKeyword_1());
+                        
+            // InternalProblem.g:1599:3: ( (lv_upperBound_2_0= ruleUpperBound ) )
+            // InternalProblem.g:1600:4: (lv_upperBound_2_0= ruleUpperBound )
+            {
+            // InternalProblem.g:1600:4: (lv_upperBound_2_0= ruleUpperBound )
+            // InternalProblem.g:1601:5: lv_upperBound_2_0= ruleUpperBound
+            {
+
+                                                newCompositeNode(grammarAccess.getRangeMultiplicityAccess().getUpperBoundUpperBoundParserRuleCall_2_0());
+                                        
+            pushFollow(FOLLOW_2);
+            lv_upperBound_2_0=ruleUpperBound();
+
+            state._fsp--;
+
+
+                                                if (current==null) {
+                                                        current = createModelElementForParent(grammarAccess.getRangeMultiplicityRule());
+                                                }
+                                                set(
+                                                        current,
+                                                        "upperBound",
+                                                        lv_upperBound_2_0,
+                                                        "org.eclipse.viatra.solver.language.Problem.UpperBound");
+                                                afterParserOrEnumRuleCall();
+                                        
+
+            }
+
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleRangeMultiplicity"
+
+
+    // $ANTLR start "entryRuleExactMultiplicity"
+    // InternalProblem.g:1622:1: entryRuleExactMultiplicity returns [EObject current=null] : iv_ruleExactMultiplicity= ruleExactMultiplicity EOF ;
+    public final EObject entryRuleExactMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        EObject iv_ruleExactMultiplicity = null;
+
+
+        try {
+            // InternalProblem.g:1622:58: (iv_ruleExactMultiplicity= ruleExactMultiplicity EOF )
+            // InternalProblem.g:1623:2: iv_ruleExactMultiplicity= ruleExactMultiplicity EOF
+            {
+             newCompositeNode(grammarAccess.getExactMultiplicityRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleExactMultiplicity=ruleExactMultiplicity();
+
+            state._fsp--;
+
+             current =iv_ruleExactMultiplicity; 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleExactMultiplicity"
+
+
+    // $ANTLR start "ruleExactMultiplicity"
+    // InternalProblem.g:1629:1: ruleExactMultiplicity returns [EObject current=null] : ( (lv_exactValue_0_0= RULE_INT ) ) ;
+    public final EObject ruleExactMultiplicity() throws RecognitionException {
+        EObject current = null;
+
+        Token lv_exactValue_0_0=null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1635:2: ( ( (lv_exactValue_0_0= RULE_INT ) ) )
+            // InternalProblem.g:1636:2: ( (lv_exactValue_0_0= RULE_INT ) )
+            {
+            // InternalProblem.g:1636:2: ( (lv_exactValue_0_0= RULE_INT ) )
+            // InternalProblem.g:1637:3: (lv_exactValue_0_0= RULE_INT )
+            {
+            // InternalProblem.g:1637:3: (lv_exactValue_0_0= RULE_INT )
+            // InternalProblem.g:1638:4: lv_exactValue_0_0= RULE_INT
+            {
+            lv_exactValue_0_0=(Token)match(input,RULE_INT,FOLLOW_2); 
+
+                                        newLeafNode(lv_exactValue_0_0, grammarAccess.getExactMultiplicityAccess().getExactValueINTTerminalRuleCall_0());
+                                
+
+                                        if (current==null) {
+                                                current = createModelElement(grammarAccess.getExactMultiplicityRule());
+                                        }
+                                        setWithLastConsumed(
+                                                current,
+                                                "exactValue",
+                                                lv_exactValue_0_0,
+                                                "org.eclipse.xtext.common.Terminals.INT");
+                                
+
+            }
+
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleExactMultiplicity"
+
+
+    // $ANTLR start "entryRuleUpperBound"
+    // InternalProblem.g:1657:1: entryRuleUpperBound returns [String current=null] : iv_ruleUpperBound= ruleUpperBound EOF ;
+    public final String entryRuleUpperBound() throws RecognitionException {
+        String current = null;
+
+        AntlrDatatypeRuleToken iv_ruleUpperBound = null;
+
+
+        try {
+            // InternalProblem.g:1657:50: (iv_ruleUpperBound= ruleUpperBound EOF )
+            // InternalProblem.g:1658:2: iv_ruleUpperBound= ruleUpperBound EOF
+            {
+             newCompositeNode(grammarAccess.getUpperBoundRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleUpperBound=ruleUpperBound();
+
+            state._fsp--;
+
+             current =iv_ruleUpperBound.getText(); 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleUpperBound"
+
+
+    // $ANTLR start "ruleUpperBound"
+    // InternalProblem.g:1664:1: ruleUpperBound returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()] : (this_INT_0= RULE_INT | kw= '*' ) ;
+    public final AntlrDatatypeRuleToken ruleUpperBound() throws RecognitionException {
+        AntlrDatatypeRuleToken current = new AntlrDatatypeRuleToken();
+
+        Token this_INT_0=null;
+        Token kw=null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1670:2: ( (this_INT_0= RULE_INT | kw= '*' ) )
+            // InternalProblem.g:1671:2: (this_INT_0= RULE_INT | kw= '*' )
+            {
+            // InternalProblem.g:1671:2: (this_INT_0= RULE_INT | kw= '*' )
+            int alt39=2;
+            int LA39_0 = input.LA(1);
+
+            if ( (LA39_0==RULE_INT) ) {
+                alt39=1;
+            }
+            else if ( (LA39_0==39) ) {
+                alt39=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 39, 0, input);
+
+                throw nvae;
+            }
+            switch (alt39) {
+                case 1 :
+                    // InternalProblem.g:1672:3: this_INT_0= RULE_INT
+                    {
+                    this_INT_0=(Token)match(input,RULE_INT,FOLLOW_2); 
+
+                                        current.merge(this_INT_0);
+                                
+
+                                        newLeafNode(this_INT_0, grammarAccess.getUpperBoundAccess().getINTTerminalRuleCall_0());
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1680:3: kw= '*'
+                    {
+                    kw=(Token)match(input,39,FOLLOW_2); 
+
+                                        current.merge(kw);
+                                        newLeafNode(kw, grammarAccess.getUpperBoundAccess().getAsteriskKeyword_1());
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleUpperBound"
+
+
+    // $ANTLR start "entryRuleQuotedOrUnquotedId"
+    // InternalProblem.g:1689:1: entryRuleQuotedOrUnquotedId returns [String current=null] : iv_ruleQuotedOrUnquotedId= ruleQuotedOrUnquotedId EOF ;
+    public final String entryRuleQuotedOrUnquotedId() throws RecognitionException {
+        String current = null;
+
+        AntlrDatatypeRuleToken iv_ruleQuotedOrUnquotedId = null;
+
+
+        try {
+            // InternalProblem.g:1689:58: (iv_ruleQuotedOrUnquotedId= ruleQuotedOrUnquotedId EOF )
+            // InternalProblem.g:1690:2: iv_ruleQuotedOrUnquotedId= ruleQuotedOrUnquotedId EOF
+            {
+             newCompositeNode(grammarAccess.getQuotedOrUnquotedIdRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleQuotedOrUnquotedId=ruleQuotedOrUnquotedId();
+
+            state._fsp--;
+
+             current =iv_ruleQuotedOrUnquotedId.getText(); 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleQuotedOrUnquotedId"
+
+
+    // $ANTLR start "ruleQuotedOrUnquotedId"
+    // InternalProblem.g:1696:1: ruleQuotedOrUnquotedId returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()] : (this_QUOTED_ID_0= RULE_QUOTED_ID | this_Identifier_1= ruleIdentifier ) ;
+    public final AntlrDatatypeRuleToken ruleQuotedOrUnquotedId() throws RecognitionException {
+        AntlrDatatypeRuleToken current = new AntlrDatatypeRuleToken();
+
+        Token this_QUOTED_ID_0=null;
+        AntlrDatatypeRuleToken this_Identifier_1 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1702:2: ( (this_QUOTED_ID_0= RULE_QUOTED_ID | this_Identifier_1= ruleIdentifier ) )
+            // InternalProblem.g:1703:2: (this_QUOTED_ID_0= RULE_QUOTED_ID | this_Identifier_1= ruleIdentifier )
+            {
+            // InternalProblem.g:1703:2: (this_QUOTED_ID_0= RULE_QUOTED_ID | this_Identifier_1= ruleIdentifier )
+            int alt40=2;
+            int LA40_0 = input.LA(1);
+
+            if ( (LA40_0==RULE_QUOTED_ID) ) {
+                alt40=1;
+            }
+            else if ( (LA40_0==RULE_ID||(LA40_0>=40 && LA40_0<=41)) ) {
+                alt40=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 40, 0, input);
+
+                throw nvae;
+            }
+            switch (alt40) {
+                case 1 :
+                    // InternalProblem.g:1704:3: this_QUOTED_ID_0= RULE_QUOTED_ID
+                    {
+                    this_QUOTED_ID_0=(Token)match(input,RULE_QUOTED_ID,FOLLOW_2); 
+
+                                        current.merge(this_QUOTED_ID_0);
+                                
+
+                                        newLeafNode(this_QUOTED_ID_0, grammarAccess.getQuotedOrUnquotedIdAccess().getQUOTED_IDTerminalRuleCall_0());
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1712:3: this_Identifier_1= ruleIdentifier
+                    {
+
+                                        newCompositeNode(grammarAccess.getQuotedOrUnquotedIdAccess().getIdentifierParserRuleCall_1());
+                                
+                    pushFollow(FOLLOW_2);
+                    this_Identifier_1=ruleIdentifier();
+
+                    state._fsp--;
+
+
+                                        current.merge(this_Identifier_1);
+                                
+
+                                        afterParserOrEnumRuleCall();
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleQuotedOrUnquotedId"
+
+
+    // $ANTLR start "entryRuleQualifiedName"
+    // InternalProblem.g:1726:1: entryRuleQualifiedName returns [String current=null] : iv_ruleQualifiedName= ruleQualifiedName EOF ;
+    public final String entryRuleQualifiedName() throws RecognitionException {
+        String current = null;
+
+        AntlrDatatypeRuleToken iv_ruleQualifiedName = null;
+
+
+        try {
+            // InternalProblem.g:1726:53: (iv_ruleQualifiedName= ruleQualifiedName EOF )
+            // InternalProblem.g:1727:2: iv_ruleQualifiedName= ruleQualifiedName EOF
+            {
+             newCompositeNode(grammarAccess.getQualifiedNameRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleQualifiedName=ruleQualifiedName();
+
+            state._fsp--;
+
+             current =iv_ruleQualifiedName.getText(); 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleQualifiedName"
+
+
+    // $ANTLR start "ruleQualifiedName"
+    // InternalProblem.g:1733:1: ruleQualifiedName returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()] : (this_QUOTED_ID_0= RULE_QUOTED_ID | (this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )? ) ) ;
+    public final AntlrDatatypeRuleToken ruleQualifiedName() throws RecognitionException {
+        AntlrDatatypeRuleToken current = new AntlrDatatypeRuleToken();
+
+        Token this_QUOTED_ID_0=null;
+        Token kw=null;
+        Token this_QUOTED_ID_5=null;
+        AntlrDatatypeRuleToken this_Identifier_1 = null;
+
+        AntlrDatatypeRuleToken this_Identifier_3 = null;
+
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1739:2: ( (this_QUOTED_ID_0= RULE_QUOTED_ID | (this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )? ) ) )
+            // InternalProblem.g:1740:2: (this_QUOTED_ID_0= RULE_QUOTED_ID | (this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )? ) )
+            {
+            // InternalProblem.g:1740:2: (this_QUOTED_ID_0= RULE_QUOTED_ID | (this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )? ) )
+            int alt43=2;
+            int LA43_0 = input.LA(1);
+
+            if ( (LA43_0==RULE_QUOTED_ID) ) {
+                alt43=1;
+            }
+            else if ( (LA43_0==RULE_ID||(LA43_0>=40 && LA43_0<=41)) ) {
+                alt43=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 43, 0, input);
+
+                throw nvae;
+            }
+            switch (alt43) {
+                case 1 :
+                    // InternalProblem.g:1741:3: this_QUOTED_ID_0= RULE_QUOTED_ID
+                    {
+                    this_QUOTED_ID_0=(Token)match(input,RULE_QUOTED_ID,FOLLOW_2); 
+
+                                        current.merge(this_QUOTED_ID_0);
+                                
+
+                                        newLeafNode(this_QUOTED_ID_0, grammarAccess.getQualifiedNameAccess().getQUOTED_IDTerminalRuleCall_0());
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1749:3: (this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )? )
+                    {
+                    // InternalProblem.g:1749:3: (this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )? )
+                    // InternalProblem.g:1750:4: this_Identifier_1= ruleIdentifier (kw= ':' this_Identifier_3= ruleIdentifier )* (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )?
+                    {
+
+                                                newCompositeNode(grammarAccess.getQualifiedNameAccess().getIdentifierParserRuleCall_1_0());
+                                        
+                    pushFollow(FOLLOW_36);
+                    this_Identifier_1=ruleIdentifier();
+
+                    state._fsp--;
+
+
+                                                current.merge(this_Identifier_1);
+                                        
+
+                                                afterParserOrEnumRuleCall();
+                                        
+                    // InternalProblem.g:1760:4: (kw= ':' this_Identifier_3= ruleIdentifier )*
+                    loop41:
+                    do {
+                        int alt41=2;
+                        int LA41_0 = input.LA(1);
+
+                        if ( (LA41_0==34) ) {
+                            int LA41_1 = input.LA(2);
+
+                            if ( (LA41_1==RULE_ID||(LA41_1>=40 && LA41_1<=41)) ) {
+                                alt41=1;
+                            }
+
+
+                        }
+
+
+                        switch (alt41) {
+                        case 1 :
+                            // InternalProblem.g:1761:5: kw= ':' this_Identifier_3= ruleIdentifier
+                            {
+                            kw=(Token)match(input,34,FOLLOW_3); 
+
+                                                                current.merge(kw);
+                                                                newLeafNode(kw, grammarAccess.getQualifiedNameAccess().getColonKeyword_1_1_0());
+                                                        
+
+                                                                newCompositeNode(grammarAccess.getQualifiedNameAccess().getIdentifierParserRuleCall_1_1_1());
+                                                        
+                            pushFollow(FOLLOW_36);
+                            this_Identifier_3=ruleIdentifier();
+
+                            state._fsp--;
+
+
+                                                                current.merge(this_Identifier_3);
+                                                        
+
+                                                                afterParserOrEnumRuleCall();
+                                                        
+
+                            }
+                            break;
+
+                        default :
+                            break loop41;
+                        }
+                    } while (true);
+
+                    // InternalProblem.g:1777:4: (kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID )?
+                    int alt42=2;
+                    int LA42_0 = input.LA(1);
+
+                    if ( (LA42_0==34) ) {
+                        alt42=1;
+                    }
+                    switch (alt42) {
+                        case 1 :
+                            // InternalProblem.g:1778:5: kw= ':' this_QUOTED_ID_5= RULE_QUOTED_ID
+                            {
+                            kw=(Token)match(input,34,FOLLOW_37); 
+
+                                                                current.merge(kw);
+                                                                newLeafNode(kw, grammarAccess.getQualifiedNameAccess().getColonKeyword_1_2_0());
+                                                        
+                            this_QUOTED_ID_5=(Token)match(input,RULE_QUOTED_ID,FOLLOW_2); 
+
+                                                                current.merge(this_QUOTED_ID_5);
+                                                        
+
+                                                                newLeafNode(this_QUOTED_ID_5, grammarAccess.getQualifiedNameAccess().getQUOTED_IDTerminalRuleCall_1_2_1());
+                                                        
+
+                            }
+                            break;
+
+                    }
+
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleQualifiedName"
+
+
+    // $ANTLR start "entryRuleIdentifier"
+    // InternalProblem.g:1796:1: entryRuleIdentifier returns [String current=null] : iv_ruleIdentifier= ruleIdentifier EOF ;
+    public final String entryRuleIdentifier() throws RecognitionException {
+        String current = null;
+
+        AntlrDatatypeRuleToken iv_ruleIdentifier = null;
+
+
+        try {
+            // InternalProblem.g:1796:50: (iv_ruleIdentifier= ruleIdentifier EOF )
+            // InternalProblem.g:1797:2: iv_ruleIdentifier= ruleIdentifier EOF
+            {
+             newCompositeNode(grammarAccess.getIdentifierRule()); 
+            pushFollow(FOLLOW_1);
+            iv_ruleIdentifier=ruleIdentifier();
+
+            state._fsp--;
+
+             current =iv_ruleIdentifier.getText(); 
+            match(input,EOF,FOLLOW_2); 
+
+            }
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "entryRuleIdentifier"
+
+
+    // $ANTLR start "ruleIdentifier"
+    // InternalProblem.g:1803:1: ruleIdentifier returns [AntlrDatatypeRuleToken current=new AntlrDatatypeRuleToken()] : (this_ID_0= RULE_ID | kw= 'true' | kw= 'false' ) ;
+    public final AntlrDatatypeRuleToken ruleIdentifier() throws RecognitionException {
+        AntlrDatatypeRuleToken current = new AntlrDatatypeRuleToken();
+
+        Token this_ID_0=null;
+        Token kw=null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1809:2: ( (this_ID_0= RULE_ID | kw= 'true' | kw= 'false' ) )
+            // InternalProblem.g:1810:2: (this_ID_0= RULE_ID | kw= 'true' | kw= 'false' )
+            {
+            // InternalProblem.g:1810:2: (this_ID_0= RULE_ID | kw= 'true' | kw= 'false' )
+            int alt44=3;
+            switch ( input.LA(1) ) {
+            case RULE_ID:
+                {
+                alt44=1;
+                }
+                break;
+            case 40:
+                {
+                alt44=2;
+                }
+                break;
+            case 41:
+                {
+                alt44=3;
+                }
+                break;
+            default:
+                NoViableAltException nvae =
+                    new NoViableAltException("", 44, 0, input);
+
+                throw nvae;
+            }
+
+            switch (alt44) {
+                case 1 :
+                    // InternalProblem.g:1811:3: this_ID_0= RULE_ID
+                    {
+                    this_ID_0=(Token)match(input,RULE_ID,FOLLOW_2); 
+
+                                        current.merge(this_ID_0);
+                                
+
+                                        newLeafNode(this_ID_0, grammarAccess.getIdentifierAccess().getIDTerminalRuleCall_0());
+                                
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1819:3: kw= 'true'
+                    {
+                    kw=(Token)match(input,40,FOLLOW_2); 
+
+                                        current.merge(kw);
+                                        newLeafNode(kw, grammarAccess.getIdentifierAccess().getTrueKeyword_1());
+                                
+
+                    }
+                    break;
+                case 3 :
+                    // InternalProblem.g:1825:3: kw= 'false'
+                    {
+                    kw=(Token)match(input,41,FOLLOW_2); 
+
+                                        current.merge(kw);
+                                        newLeafNode(kw, grammarAccess.getIdentifierAccess().getFalseKeyword_2());
+                                
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleIdentifier"
+
+
+    // $ANTLR start "ruleLogicValue"
+    // InternalProblem.g:1834:1: ruleLogicValue returns [Enumerator current=null] : ( (enumLiteral_0= 'true' ) | (enumLiteral_1= 'false' ) | (enumLiteral_2= 'unknown' ) ) ;
+    public final Enumerator ruleLogicValue() throws RecognitionException {
+        Enumerator current = null;
+
+        Token enumLiteral_0=null;
+        Token enumLiteral_1=null;
+        Token enumLiteral_2=null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1840:2: ( ( (enumLiteral_0= 'true' ) | (enumLiteral_1= 'false' ) | (enumLiteral_2= 'unknown' ) ) )
+            // InternalProblem.g:1841:2: ( (enumLiteral_0= 'true' ) | (enumLiteral_1= 'false' ) | (enumLiteral_2= 'unknown' ) )
+            {
+            // InternalProblem.g:1841:2: ( (enumLiteral_0= 'true' ) | (enumLiteral_1= 'false' ) | (enumLiteral_2= 'unknown' ) )
+            int alt45=3;
+            switch ( input.LA(1) ) {
+            case 40:
+                {
+                alt45=1;
+                }
+                break;
+            case 41:
+                {
+                alt45=2;
+                }
+                break;
+            case 42:
+                {
+                alt45=3;
+                }
+                break;
+            default:
+                NoViableAltException nvae =
+                    new NoViableAltException("", 45, 0, input);
+
+                throw nvae;
+            }
+
+            switch (alt45) {
+                case 1 :
+                    // InternalProblem.g:1842:3: (enumLiteral_0= 'true' )
+                    {
+                    // InternalProblem.g:1842:3: (enumLiteral_0= 'true' )
+                    // InternalProblem.g:1843:4: enumLiteral_0= 'true'
+                    {
+                    enumLiteral_0=(Token)match(input,40,FOLLOW_2); 
+
+                                                current = grammarAccess.getLogicValueAccess().getTRUEEnumLiteralDeclaration_0().getEnumLiteral().getInstance();
+                                                newLeafNode(enumLiteral_0, grammarAccess.getLogicValueAccess().getTRUEEnumLiteralDeclaration_0());
+                                        
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1850:3: (enumLiteral_1= 'false' )
+                    {
+                    // InternalProblem.g:1850:3: (enumLiteral_1= 'false' )
+                    // InternalProblem.g:1851:4: enumLiteral_1= 'false'
+                    {
+                    enumLiteral_1=(Token)match(input,41,FOLLOW_2); 
+
+                                                current = grammarAccess.getLogicValueAccess().getFALSEEnumLiteralDeclaration_1().getEnumLiteral().getInstance();
+                                                newLeafNode(enumLiteral_1, grammarAccess.getLogicValueAccess().getFALSEEnumLiteralDeclaration_1());
+                                        
+
+                    }
+
+
+                    }
+                    break;
+                case 3 :
+                    // InternalProblem.g:1858:3: (enumLiteral_2= 'unknown' )
+                    {
+                    // InternalProblem.g:1858:3: (enumLiteral_2= 'unknown' )
+                    // InternalProblem.g:1859:4: enumLiteral_2= 'unknown'
+                    {
+                    enumLiteral_2=(Token)match(input,42,FOLLOW_2); 
+
+                                                current = grammarAccess.getLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_2().getEnumLiteral().getInstance();
+                                                newLeafNode(enumLiteral_2, grammarAccess.getLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_2());
+                                        
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleLogicValue"
+
+
+    // $ANTLR start "ruleShortLogicValue"
+    // InternalProblem.g:1869:1: ruleShortLogicValue returns [Enumerator current=null] : ( (enumLiteral_0= '!' ) | (enumLiteral_1= '?' ) ) ;
+    public final Enumerator ruleShortLogicValue() throws RecognitionException {
+        Enumerator current = null;
+
+        Token enumLiteral_0=null;
+        Token enumLiteral_1=null;
+
+
+                enterRule();
+
+        try {
+            // InternalProblem.g:1875:2: ( ( (enumLiteral_0= '!' ) | (enumLiteral_1= '?' ) ) )
+            // InternalProblem.g:1876:2: ( (enumLiteral_0= '!' ) | (enumLiteral_1= '?' ) )
+            {
+            // InternalProblem.g:1876:2: ( (enumLiteral_0= '!' ) | (enumLiteral_1= '?' ) )
+            int alt46=2;
+            int LA46_0 = input.LA(1);
+
+            if ( (LA46_0==32) ) {
+                alt46=1;
+            }
+            else if ( (LA46_0==43) ) {
+                alt46=2;
+            }
+            else {
+                NoViableAltException nvae =
+                    new NoViableAltException("", 46, 0, input);
+
+                throw nvae;
+            }
+            switch (alt46) {
+                case 1 :
+                    // InternalProblem.g:1877:3: (enumLiteral_0= '!' )
+                    {
+                    // InternalProblem.g:1877:3: (enumLiteral_0= '!' )
+                    // InternalProblem.g:1878:4: enumLiteral_0= '!'
+                    {
+                    enumLiteral_0=(Token)match(input,32,FOLLOW_2); 
+
+                                                current = grammarAccess.getShortLogicValueAccess().getFALSEEnumLiteralDeclaration_0().getEnumLiteral().getInstance();
+                                                newLeafNode(enumLiteral_0, grammarAccess.getShortLogicValueAccess().getFALSEEnumLiteralDeclaration_0());
+                                        
+
+                    }
+
+
+                    }
+                    break;
+                case 2 :
+                    // InternalProblem.g:1885:3: (enumLiteral_1= '?' )
+                    {
+                    // InternalProblem.g:1885:3: (enumLiteral_1= '?' )
+                    // InternalProblem.g:1886:4: enumLiteral_1= '?'
+                    {
+                    enumLiteral_1=(Token)match(input,43,FOLLOW_2); 
+
+                                                current = grammarAccess.getShortLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_1().getEnumLiteral().getInstance();
+                                                newLeafNode(enumLiteral_1, grammarAccess.getShortLogicValueAccess().getUNKNOWNEnumLiteralDeclaration_1());
+                                        
+
+                    }
+
+
+                    }
+                    break;
+
+            }
+
+
+            }
+
+
+                leaveRule();
+
+        }
+
+            catch (RecognitionException re) {
+                recover(input,re);
+                appendSkippedTokens();
+            }
+        finally {
+        }
+        return current;
+    }
+    // $ANTLR end "ruleShortLogicValue"
+
+    // Delegated rules
+
+
+    protected DFA34 dfa34 = new DFA34(this);
+    static final String dfa_1s = "\41\uffff";
+    static final String dfa_2s = "\1\4\4\35\1\uffff\2\4\4\21\1\15\4\35\2\4\1\uffff\10\21\1\4\4\21";
+    static final String dfa_3s = "\1\53\1\35\3\42\1\uffff\2\51\1\36\7\42\1\35\2\51\1\uffff\1\36\6\42\1\36\1\51\3\42\1\36";
+    static final String dfa_4s = "\5\uffff\1\2\15\uffff\1\1\15\uffff";
+    static final String dfa_5s = "\41\uffff}>";
+    static final String[] dfa_6s = {
+            "\1\2\1\uffff\1\1\31\uffff\1\5\7\uffff\1\3\1\4\1\uffff\1\5",
+            "\1\6",
+            "\1\6\4\uffff\1\7",
+            "\1\6\4\uffff\1\7",
+            "\1\6\4\uffff\1\7",
+            "",
+            "\1\11\1\uffff\1\10\27\uffff\1\14\11\uffff\1\12\1\13",
+            "\1\15\1\uffff\1\20\41\uffff\1\16\1\17",
+            "\1\21\14\uffff\1\14",
+            "\1\21\14\uffff\1\14\3\uffff\1\22",
+            "\1\21\14\uffff\1\14\3\uffff\1\22",
+            "\1\21\14\uffff\1\14\3\uffff\1\22",
+            "\1\5\24\uffff\1\23",
+            "\1\6\4\uffff\1\7",
+            "\1\6\4\uffff\1\7",
+            "\1\6\4\uffff\1\7",
+            "\1\6",
+            "\1\25\1\uffff\1\24\41\uffff\1\26\1\27",
+            "\1\30\1\uffff\1\33\41\uffff\1\31\1\32",
+            "",
+            "\1\21\14\uffff\1\14",
+            "\1\21\14\uffff\1\14\3\uffff\1\34",
+            "\1\21\14\uffff\1\14\3\uffff\1\34",
+            "\1\21\14\uffff\1\14\3\uffff\1\34",
+            "\1\21\14\uffff\1\14\3\uffff\1\22",
+            "\1\21\14\uffff\1\14\3\uffff\1\22",
+            "\1\21\14\uffff\1\14\3\uffff\1\22",
+            "\1\21\14\uffff\1\14",
+            "\1\35\1\uffff\1\40\41\uffff\1\36\1\37",
+            "\1\21\14\uffff\1\14\3\uffff\1\34",
+            "\1\21\14\uffff\1\14\3\uffff\1\34",
+            "\1\21\14\uffff\1\14\3\uffff\1\34",
+            "\1\21\14\uffff\1\14"
+    };
+
+    static final short[] dfa_1 = DFA.unpackEncodedString(dfa_1s);
+    static final char[] dfa_2 = DFA.unpackEncodedStringToUnsignedChars(dfa_2s);
+    static final char[] dfa_3 = DFA.unpackEncodedStringToUnsignedChars(dfa_3s);
+    static final short[] dfa_4 = DFA.unpackEncodedString(dfa_4s);
+    static final short[] dfa_5 = DFA.unpackEncodedString(dfa_5s);
+    static final short[][] dfa_6 = unpackEncodedStringArray(dfa_6s);
+
+    class DFA34 extends DFA {
+
+        public DFA34(BaseRecognizer recognizer) {
+            this.recognizer = recognizer;
+            this.decisionNumber = 34;
+            this.eot = dfa_1;
+            this.eof = dfa_1;
+            this.min = dfa_2;
+            this.max = dfa_3;
+            this.accept = dfa_4;
+            this.special = dfa_5;
+            this.transition = dfa_6;
+        }
+        public String getDescription() {
+            return "1138:3: ( ( ( ( ruleQualifiedName ) ) otherlv_1= '(' ( ( ( ruleQualifiedName ) ) (otherlv_3= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_5= ')' otherlv_6= ':' ( (lv_value_7_0= ruleLogicValue ) ) ) | ( ( (lv_value_8_0= ruleShortLogicValue ) )? ( ( ruleQualifiedName ) ) otherlv_10= '(' ( ( ( ruleQualifiedName ) ) (otherlv_12= ',' ( ( ruleQualifiedName ) ) )* )? otherlv_14= ')' ) )";
+        }
+    }
+ 
+
+    public static final BitSet FOLLOW_1 = new BitSet(new long[]{0x0000000000000000L});
+    public static final BitSet FOLLOW_2 = new BitSet(new long[]{0x0000000000000002L});
+    public static final BitSet FOLLOW_3 = new BitSet(new long[]{0x0000030000000010L});
+    public static final BitSet FOLLOW_4 = new BitSet(new long[]{0x0000000000002000L});
+    public static final BitSet FOLLOW_5 = new BitSet(new long[]{0x00000B091820C052L});
+    public static final BitSet FOLLOW_6 = new BitSet(new long[]{0x0000000000008000L});
+    public static final BitSet FOLLOW_7 = new BitSet(new long[]{0x0000000000052000L});
+    public static final BitSet FOLLOW_8 = new BitSet(new long[]{0x0000030000000050L});
+    public static final BitSet FOLLOW_9 = new BitSet(new long[]{0x0000000000062000L});
+    public static final BitSet FOLLOW_10 = new BitSet(new long[]{0x0000030000D00050L});
+    public static final BitSet FOLLOW_11 = new BitSet(new long[]{0x0000030000D80050L});
+    public static final BitSet FOLLOW_12 = new BitSet(new long[]{0x0000000000042000L});
+    public static final BitSet FOLLOW_13 = new BitSet(new long[]{0x0000030000100050L});
+    public static final BitSet FOLLOW_14 = new BitSet(new long[]{0x00000000001A0000L});
+    public static final BitSet FOLLOW_15 = new BitSet(new long[]{0x0000000000100000L});
+    public static final BitSet FOLLOW_16 = new BitSet(new long[]{0x0000030001000010L});
+    public static final BitSet FOLLOW_17 = new BitSet(new long[]{0x0000000000000020L});
+    public static final BitSet FOLLOW_18 = new BitSet(new long[]{0x0000000002000000L});
+    public static final BitSet FOLLOW_19 = new BitSet(new long[]{0x0000000004000002L});
+    public static final BitSet FOLLOW_20 = new BitSet(new long[]{0x0000030010000010L});
+    public static final BitSet FOLLOW_21 = new BitSet(new long[]{0x0000000020000000L});
+    public static final BitSet FOLLOW_22 = new BitSet(new long[]{0x0000030040000050L});
+    public static final BitSet FOLLOW_23 = new BitSet(new long[]{0x0000000040020000L});
+    public static final BitSet FOLLOW_24 = new BitSet(new long[]{0x0000000080002000L});
+    public static final BitSet FOLLOW_25 = new BitSet(new long[]{0x0000030100000050L});
+    public static final BitSet FOLLOW_26 = new BitSet(new long[]{0x0000000000082000L});
+    public static final BitSet FOLLOW_27 = new BitSet(new long[]{0x0000000000020002L});
+    public static final BitSet FOLLOW_28 = new BitSet(new long[]{0x0000000220000000L});
+    public static final BitSet FOLLOW_29 = new BitSet(new long[]{0x0000000400000000L});
+    public static final BitSet FOLLOW_30 = new BitSet(new long[]{0x0000070000000000L});
+    public static final BitSet FOLLOW_31 = new BitSet(new long[]{0x0000000000000010L});
+    public static final BitSet FOLLOW_32 = new BitSet(new long[]{0x0000000000022000L});
+    public static final BitSet FOLLOW_33 = new BitSet(new long[]{0x0000003000000000L});
+    public static final BitSet FOLLOW_34 = new BitSet(new long[]{0x0000004000000000L});
+    public static final BitSet FOLLOW_35 = new BitSet(new long[]{0x0000008000000020L});
+    public static final BitSet FOLLOW_36 = new BitSet(new long[]{0x0000000400000002L});
+    public static final BitSet FOLLOW_37 = new BitSet(new long[]{0x0000000000000040L});
+
+}
\ No newline at end of file
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java
new file mode 100644
index 00000000..5b024d47
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/scoping/AbstractProblemScopeProvider.java
@@ -0,0 +1,9 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.scoping;
+
+import org.eclipse.xtext.scoping.impl.DelegatingScopeProvider;
+
+public abstract class AbstractProblemScopeProvider extends DelegatingScopeProvider {
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java
new file mode 100644
index 00000000..cb44c31f
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSemanticSequencer.java
@@ -0,0 +1,369 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.serializer;
+
+import com.google.inject.Inject;
+import java.util.Set;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EPackage;
+import org.eclipse.viatra.solver.language.model.problem.Argument;
+import org.eclipse.viatra.solver.language.model.problem.Assertion;
+import org.eclipse.viatra.solver.language.model.problem.Atom;
+import org.eclipse.viatra.solver.language.model.problem.ClassDeclaration;
+import org.eclipse.viatra.solver.language.model.problem.Conjunction;
+import org.eclipse.viatra.solver.language.model.problem.EnumDeclaration;
+import org.eclipse.viatra.solver.language.model.problem.ExactMultiplicity;
+import org.eclipse.viatra.solver.language.model.problem.NegativeLiteral;
+import org.eclipse.viatra.solver.language.model.problem.Node;
+import org.eclipse.viatra.solver.language.model.problem.PredicateDefinition;
+import org.eclipse.viatra.solver.language.model.problem.Problem;
+import org.eclipse.viatra.solver.language.model.problem.ProblemPackage;
+import org.eclipse.viatra.solver.language.model.problem.RangeMultiplicity;
+import org.eclipse.viatra.solver.language.model.problem.ReferenceDeclaration;
+import org.eclipse.viatra.solver.language.model.problem.ScopeDeclaration;
+import org.eclipse.viatra.solver.language.model.problem.TypeScope;
+import org.eclipse.viatra.solver.language.model.problem.UnboundedMultiplicity;
+import org.eclipse.viatra.solver.language.services.ProblemGrammarAccess;
+import org.eclipse.xtext.Action;
+import org.eclipse.xtext.Parameter;
+import org.eclipse.xtext.ParserRule;
+import org.eclipse.xtext.serializer.ISerializationContext;
+import org.eclipse.xtext.serializer.acceptor.SequenceFeeder;
+import org.eclipse.xtext.serializer.sequencer.AbstractDelegatingSemanticSequencer;
+import org.eclipse.xtext.serializer.sequencer.ITransientValueService.ValueTransient;
+
+@SuppressWarnings("all")
+public class ProblemSemanticSequencer extends AbstractDelegatingSemanticSequencer {
+
+        @Inject
+        private ProblemGrammarAccess grammarAccess;
+        
+        @Override
+        public void sequence(ISerializationContext context, EObject semanticObject) {
+                EPackage epackage = semanticObject.eClass().getEPackage();
+                ParserRule rule = context.getParserRule();
+                Action action = context.getAssignedAction();
+                Set<Parameter> parameters = context.getEnabledBooleanParameters();
+                if (epackage == ProblemPackage.eINSTANCE)
+                        switch (semanticObject.eClass().getClassifierID()) {
+                        case ProblemPackage.ARGUMENT:
+                                sequence_Argument(context, (Argument) semanticObject); 
+                                return; 
+                        case ProblemPackage.ASSERTION:
+                                sequence_Assertion(context, (Assertion) semanticObject); 
+                                return; 
+                        case ProblemPackage.ATOM:
+                                sequence_Atom(context, (Atom) semanticObject); 
+                                return; 
+                        case ProblemPackage.CLASS_DECLARATION:
+                                sequence_ClassDeclaration(context, (ClassDeclaration) semanticObject); 
+                                return; 
+                        case ProblemPackage.CONJUNCTION:
+                                sequence_Conjunction(context, (Conjunction) semanticObject); 
+                                return; 
+                        case ProblemPackage.ENUM_DECLARATION:
+                                sequence_EnumDeclaration(context, (EnumDeclaration) semanticObject); 
+                                return; 
+                        case ProblemPackage.EXACT_MULTIPLICITY:
+                                sequence_ExactMultiplicity(context, (ExactMultiplicity) semanticObject); 
+                                return; 
+                        case ProblemPackage.NEGATIVE_LITERAL:
+                                sequence_NegativeLiteral(context, (NegativeLiteral) semanticObject); 
+                                return; 
+                        case ProblemPackage.NODE:
+                                sequence_EnumLiteral(context, (Node) semanticObject); 
+                                return; 
+                        case ProblemPackage.PARAMETER:
+                                sequence_Parameter(context, (org.eclipse.viatra.solver.language.model.problem.Parameter) semanticObject); 
+                                return; 
+                        case ProblemPackage.PREDICATE_DEFINITION:
+                                sequence_PredicateDefinition(context, (PredicateDefinition) semanticObject); 
+                                return; 
+                        case ProblemPackage.PROBLEM:
+                                sequence_Problem(context, (Problem) semanticObject); 
+                                return; 
+                        case ProblemPackage.RANGE_MULTIPLICITY:
+                                sequence_RangeMultiplicity(context, (RangeMultiplicity) semanticObject); 
+                                return; 
+                        case ProblemPackage.REFERENCE_DECLARATION:
+                                sequence_ReferenceDeclaration(context, (ReferenceDeclaration) semanticObject); 
+                                return; 
+                        case ProblemPackage.SCOPE_DECLARATION:
+                                sequence_ScopeDeclaration(context, (ScopeDeclaration) semanticObject); 
+                                return; 
+                        case ProblemPackage.TYPE_SCOPE:
+                                sequence_TypeScope(context, (TypeScope) semanticObject); 
+                                return; 
+                        case ProblemPackage.UNBOUNDED_MULTIPLICITY:
+                                sequence_UnboundedMultiplicity(context, (UnboundedMultiplicity) semanticObject); 
+                                return; 
+                        }
+                if (errorAcceptor != null)
+                        errorAcceptor.accept(diagnosticProvider.createInvalidContextOrTypeDiagnostic(semanticObject, context));
+        }
+        
+        /**
+         * Contexts:
+         *     Argument returns Argument
+         *
+         * Constraint:
+         *     variableOrNode=[VariableOrNode|QualifiedName]
+         */
+        protected void sequence_Argument(ISerializationContext context, Argument semanticObject) {
+                if (errorAcceptor != null) {
+                        if (transientValues.isValueTransient(semanticObject, ProblemPackage.Literals.ARGUMENT__VARIABLE_OR_NODE) == ValueTransient.YES)
+                                errorAcceptor.accept(diagnosticProvider.createFeatureValueMissing(semanticObject, ProblemPackage.Literals.ARGUMENT__VARIABLE_OR_NODE));
+                }
+                SequenceFeeder feeder = createSequencerFeeder(context, semanticObject);
+                feeder.accept(grammarAccess.getArgumentAccess().getVariableOrNodeVariableOrNodeQualifiedNameParserRuleCall_0_1(), semanticObject.eGet(ProblemPackage.Literals.ARGUMENT__VARIABLE_OR_NODE, false));
+                feeder.finish();
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Statement returns Assertion
+         *     Assertion returns Assertion
+         *
+         * Constraint:
+         *     (
+         *         (relation=[Relation|QualifiedName] (arguments+=[Node|QualifiedName] arguments+=[Node|QualifiedName]*)? value=LogicValue) | 
+         *         (value=ShortLogicValue? relation=[Relation|QualifiedName] (arguments+=[Node|QualifiedName] arguments+=[Node|QualifiedName]*)?)
+         *     )
+         */
+        protected void sequence_Assertion(ISerializationContext context, Assertion semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Literal returns Atom
+         *     Atom returns Atom
+         *
+         * Constraint:
+         *     (relation=[Relation|QualifiedName] transitiveClosure?='+'? (arguments+=Argument arguments+=Argument*)?)
+         */
+        protected void sequence_Atom(ISerializationContext context, Atom semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Statement returns ClassDeclaration
+         *     ClassDeclaration returns ClassDeclaration
+         *
+         * Constraint:
+         *     (
+         *         abstract?='abstract'? 
+         *         name=Identifier 
+         *         (superTypes+=[Relation|QualifiedName] superTypes+=[Relation|QualifiedName]*)? 
+         *         referenceDeclarations+=ReferenceDeclaration*
+         *     )
+         */
+        protected void sequence_ClassDeclaration(ISerializationContext context, ClassDeclaration semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Conjunction returns Conjunction
+         *
+         * Constraint:
+         *     (literals+=Literal literals+=Literal*)
+         */
+        protected void sequence_Conjunction(ISerializationContext context, Conjunction semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Statement returns EnumDeclaration
+         *     EnumDeclaration returns EnumDeclaration
+         *
+         * Constraint:
+         *     (name=Identifier (literals+=EnumLiteral literals+=EnumLiteral*)?)
+         */
+        protected void sequence_EnumDeclaration(ISerializationContext context, EnumDeclaration semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     EnumLiteral returns Node
+         *
+         * Constraint:
+         *     name=QuotedOrUnquotedId
+         */
+        protected void sequence_EnumLiteral(ISerializationContext context, Node semanticObject) {
+                if (errorAcceptor != null) {
+                        if (transientValues.isValueTransient(semanticObject, ProblemPackage.Literals.NAMED_ELEMENT__NAME) == ValueTransient.YES)
+                                errorAcceptor.accept(diagnosticProvider.createFeatureValueMissing(semanticObject, ProblemPackage.Literals.NAMED_ELEMENT__NAME));
+                }
+                SequenceFeeder feeder = createSequencerFeeder(context, semanticObject);
+                feeder.accept(grammarAccess.getEnumLiteralAccess().getNameQuotedOrUnquotedIdParserRuleCall_0(), semanticObject.getName());
+                feeder.finish();
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Multiplicity returns ExactMultiplicity
+         *     DefiniteMultiplicity returns ExactMultiplicity
+         *     ExactMultiplicity returns ExactMultiplicity
+         *
+         * Constraint:
+         *     exactValue=INT
+         */
+        protected void sequence_ExactMultiplicity(ISerializationContext context, ExactMultiplicity semanticObject) {
+                if (errorAcceptor != null) {
+                        if (transientValues.isValueTransient(semanticObject, ProblemPackage.Literals.EXACT_MULTIPLICITY__EXACT_VALUE) == ValueTransient.YES)
+                                errorAcceptor.accept(diagnosticProvider.createFeatureValueMissing(semanticObject, ProblemPackage.Literals.EXACT_MULTIPLICITY__EXACT_VALUE));
+                }
+                SequenceFeeder feeder = createSequencerFeeder(context, semanticObject);
+                feeder.accept(grammarAccess.getExactMultiplicityAccess().getExactValueINTTerminalRuleCall_0(), semanticObject.getExactValue());
+                feeder.finish();
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Literal returns NegativeLiteral
+         *     NegativeLiteral returns NegativeLiteral
+         *
+         * Constraint:
+         *     atom=Atom
+         */
+        protected void sequence_NegativeLiteral(ISerializationContext context, NegativeLiteral semanticObject) {
+                if (errorAcceptor != null) {
+                        if (transientValues.isValueTransient(semanticObject, ProblemPackage.Literals.NEGATIVE_LITERAL__ATOM) == ValueTransient.YES)
+                                errorAcceptor.accept(diagnosticProvider.createFeatureValueMissing(semanticObject, ProblemPackage.Literals.NEGATIVE_LITERAL__ATOM));
+                }
+                SequenceFeeder feeder = createSequencerFeeder(context, semanticObject);
+                feeder.accept(grammarAccess.getNegativeLiteralAccess().getAtomAtomParserRuleCall_1_0(), semanticObject.getAtom());
+                feeder.finish();
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Parameter returns Parameter
+         *
+         * Constraint:
+         *     (parameterType=[Relation|QualifiedName]? name=Identifier)
+         */
+        protected void sequence_Parameter(ISerializationContext context, org.eclipse.viatra.solver.language.model.problem.Parameter semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Statement returns PredicateDefinition
+         *     PredicateDefinition returns PredicateDefinition
+         *
+         * Constraint:
+         *     (error?='error'? name=Identifier (parameters+=Parameter parameters+=Parameter*)? (bodies+=Conjunction bodies+=Conjunction*)?)
+         */
+        protected void sequence_PredicateDefinition(ISerializationContext context, PredicateDefinition semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Problem returns Problem
+         *
+         * Constraint:
+         *     ((name=Identifier statements+=Statement+) | statements+=Statement+)?
+         */
+        protected void sequence_Problem(ISerializationContext context, Problem semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Multiplicity returns RangeMultiplicity
+         *     DefiniteMultiplicity returns RangeMultiplicity
+         *     RangeMultiplicity returns RangeMultiplicity
+         *
+         * Constraint:
+         *     (lowerBound=INT upperBound=UpperBound)
+         */
+        protected void sequence_RangeMultiplicity(ISerializationContext context, RangeMultiplicity semanticObject) {
+                if (errorAcceptor != null) {
+                        if (transientValues.isValueTransient(semanticObject, ProblemPackage.Literals.RANGE_MULTIPLICITY__LOWER_BOUND) == ValueTransient.YES)
+                                errorAcceptor.accept(diagnosticProvider.createFeatureValueMissing(semanticObject, ProblemPackage.Literals.RANGE_MULTIPLICITY__LOWER_BOUND));
+                        if (transientValues.isValueTransient(semanticObject, ProblemPackage.Literals.RANGE_MULTIPLICITY__UPPER_BOUND) == ValueTransient.YES)
+                                errorAcceptor.accept(diagnosticProvider.createFeatureValueMissing(semanticObject, ProblemPackage.Literals.RANGE_MULTIPLICITY__UPPER_BOUND));
+                }
+                SequenceFeeder feeder = createSequencerFeeder(context, semanticObject);
+                feeder.accept(grammarAccess.getRangeMultiplicityAccess().getLowerBoundINTTerminalRuleCall_0_0(), semanticObject.getLowerBound());
+                feeder.accept(grammarAccess.getRangeMultiplicityAccess().getUpperBoundUpperBoundParserRuleCall_2_0(), semanticObject.getUpperBound());
+                feeder.finish();
+        }
+        
+        
+        /**
+         * Contexts:
+         *     ReferenceDeclaration returns ReferenceDeclaration
+         *
+         * Constraint:
+         *     (
+         *         containment?='contains'? 
+         *         referenceType=[Relation|QualifiedName] 
+         *         multiplicity=Multiplicity? 
+         *         name=Identifier 
+         *         opposite=[ReferenceDeclaration|QualifiedName]?
+         *     )
+         */
+        protected void sequence_ReferenceDeclaration(ISerializationContext context, ReferenceDeclaration semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Statement returns ScopeDeclaration
+         *     ScopeDeclaration returns ScopeDeclaration
+         *
+         * Constraint:
+         *     (typeScopes+=TypeScope typeScopes+=TypeScope*)
+         */
+        protected void sequence_ScopeDeclaration(ISerializationContext context, ScopeDeclaration semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     TypeScope returns TypeScope
+         *
+         * Constraint:
+         *     (targetType=[ClassDeclaration|ID] increment?='+='? multiplicity=DefiniteMultiplicity)
+         */
+        protected void sequence_TypeScope(ISerializationContext context, TypeScope semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+        /**
+         * Contexts:
+         *     Multiplicity returns UnboundedMultiplicity
+         *     UnboundedMultiplicity returns UnboundedMultiplicity
+         *
+         * Constraint:
+         *     {UnboundedMultiplicity}
+         */
+        protected void sequence_UnboundedMultiplicity(ISerializationContext context, UnboundedMultiplicity semanticObject) {
+                genericSequencer.createSequence(context, semanticObject);
+        }
+        
+        
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java
new file mode 100644
index 00000000..3f0a3f05
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/serializer/ProblemSyntacticSequencer.java
@@ -0,0 +1,139 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.serializer;
+
+import com.google.inject.Inject;
+import java.util.List;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.viatra.solver.language.services.ProblemGrammarAccess;
+import org.eclipse.xtext.IGrammarAccess;
+import org.eclipse.xtext.RuleCall;
+import org.eclipse.xtext.nodemodel.INode;
+import org.eclipse.xtext.serializer.analysis.GrammarAlias.AbstractElementAlias;
+import org.eclipse.xtext.serializer.analysis.GrammarAlias.AlternativeAlias;
+import org.eclipse.xtext.serializer.analysis.GrammarAlias.GroupAlias;
+import org.eclipse.xtext.serializer.analysis.GrammarAlias.TokenAlias;
+import org.eclipse.xtext.serializer.analysis.ISyntacticSequencerPDAProvider.ISynNavigable;
+import org.eclipse.xtext.serializer.analysis.ISyntacticSequencerPDAProvider.ISynTransition;
+import org.eclipse.xtext.serializer.sequencer.AbstractSyntacticSequencer;
+
+@SuppressWarnings("all")
+public class ProblemSyntacticSequencer extends AbstractSyntacticSequencer {
+
+        protected ProblemGrammarAccess grammarAccess;
+        protected AbstractElementAlias match_ClassDeclaration_FullStopKeyword_4_1_or___LeftCurlyBracketKeyword_4_0_0_RightCurlyBracketKeyword_4_0_2__;
+        protected AbstractElementAlias match_ClassDeclaration_SemicolonKeyword_4_0_1_1_q;
+        protected AbstractElementAlias match_EnumDeclaration_FullStopKeyword_2_1_or___LeftCurlyBracketKeyword_2_0_0_RightCurlyBracketKeyword_2_0_2__;
+        protected AbstractElementAlias match_EnumDeclaration___CommaKeyword_2_0_1_2_0_or_SemicolonKeyword_2_0_1_2_1__q;
+        protected AbstractElementAlias match_PredicateDefinition_PredKeyword_0_0_1_q;
+        protected AbstractElementAlias match_ReferenceDeclaration_RefersKeyword_0_1_q;
+        
+        @Inject
+        protected void init(IGrammarAccess access) {
+                grammarAccess = (ProblemGrammarAccess) access;
+                match_ClassDeclaration_FullStopKeyword_4_1_or___LeftCurlyBracketKeyword_4_0_0_RightCurlyBracketKeyword_4_0_2__ = new AlternativeAlias(false, false, new GroupAlias(false, false, new TokenAlias(false, false, grammarAccess.getClassDeclarationAccess().getLeftCurlyBracketKeyword_4_0_0()), new TokenAlias(false, false, grammarAccess.getClassDeclarationAccess().getRightCurlyBracketKeyword_4_0_2())), new TokenAlias(false, false, grammarAccess.getClassDeclarationAccess().getFullStopKeyword_4_1()));
+                match_ClassDeclaration_SemicolonKeyword_4_0_1_1_q = new TokenAlias(false, true, grammarAccess.getClassDeclarationAccess().getSemicolonKeyword_4_0_1_1());
+                match_EnumDeclaration_FullStopKeyword_2_1_or___LeftCurlyBracketKeyword_2_0_0_RightCurlyBracketKeyword_2_0_2__ = new AlternativeAlias(false, false, new GroupAlias(false, false, new TokenAlias(false, false, grammarAccess.getEnumDeclarationAccess().getLeftCurlyBracketKeyword_2_0_0()), new TokenAlias(false, false, grammarAccess.getEnumDeclarationAccess().getRightCurlyBracketKeyword_2_0_2())), new TokenAlias(false, false, grammarAccess.getEnumDeclarationAccess().getFullStopKeyword_2_1()));
+                match_EnumDeclaration___CommaKeyword_2_0_1_2_0_or_SemicolonKeyword_2_0_1_2_1__q = new AlternativeAlias(false, true, new TokenAlias(false, false, grammarAccess.getEnumDeclarationAccess().getCommaKeyword_2_0_1_2_0()), new TokenAlias(false, false, grammarAccess.getEnumDeclarationAccess().getSemicolonKeyword_2_0_1_2_1()));
+                match_PredicateDefinition_PredKeyword_0_0_1_q = new TokenAlias(false, true, grammarAccess.getPredicateDefinitionAccess().getPredKeyword_0_0_1());
+                match_ReferenceDeclaration_RefersKeyword_0_1_q = new TokenAlias(false, true, grammarAccess.getReferenceDeclarationAccess().getRefersKeyword_0_1());
+        }
+        
+        @Override
+        protected String getUnassignedRuleCallToken(EObject semanticObject, RuleCall ruleCall, INode node) {
+                return "";
+        }
+        
+        
+        @Override
+        protected void emitUnassignedTokens(EObject semanticObject, ISynTransition transition, INode fromNode, INode toNode) {
+                if (transition.getAmbiguousSyntaxes().isEmpty()) return;
+                List<INode> transitionNodes = collectNodes(fromNode, toNode);
+                for (AbstractElementAlias syntax : transition.getAmbiguousSyntaxes()) {
+                        List<INode> syntaxNodes = getNodesFor(transitionNodes, syntax);
+                        if (match_ClassDeclaration_FullStopKeyword_4_1_or___LeftCurlyBracketKeyword_4_0_0_RightCurlyBracketKeyword_4_0_2__.equals(syntax))
+                                emit_ClassDeclaration_FullStopKeyword_4_1_or___LeftCurlyBracketKeyword_4_0_0_RightCurlyBracketKeyword_4_0_2__(semanticObject, getLastNavigableState(), syntaxNodes);
+                        else if (match_ClassDeclaration_SemicolonKeyword_4_0_1_1_q.equals(syntax))
+                                emit_ClassDeclaration_SemicolonKeyword_4_0_1_1_q(semanticObject, getLastNavigableState(), syntaxNodes);
+                        else if (match_EnumDeclaration_FullStopKeyword_2_1_or___LeftCurlyBracketKeyword_2_0_0_RightCurlyBracketKeyword_2_0_2__.equals(syntax))
+                                emit_EnumDeclaration_FullStopKeyword_2_1_or___LeftCurlyBracketKeyword_2_0_0_RightCurlyBracketKeyword_2_0_2__(semanticObject, getLastNavigableState(), syntaxNodes);
+                        else if (match_EnumDeclaration___CommaKeyword_2_0_1_2_0_or_SemicolonKeyword_2_0_1_2_1__q.equals(syntax))
+                                emit_EnumDeclaration___CommaKeyword_2_0_1_2_0_or_SemicolonKeyword_2_0_1_2_1__q(semanticObject, getLastNavigableState(), syntaxNodes);
+                        else if (match_PredicateDefinition_PredKeyword_0_0_1_q.equals(syntax))
+                                emit_PredicateDefinition_PredKeyword_0_0_1_q(semanticObject, getLastNavigableState(), syntaxNodes);
+                        else if (match_ReferenceDeclaration_RefersKeyword_0_1_q.equals(syntax))
+                                emit_ReferenceDeclaration_RefersKeyword_0_1_q(semanticObject, getLastNavigableState(), syntaxNodes);
+                        else acceptNodes(getLastNavigableState(), syntaxNodes);
+                }
+        }
+
+        /**
+         * Ambiguous syntax:
+         *     ('{' '}') | '.'
+         *
+         * This ambiguous syntax occurs at:
+         *     name=Identifier (ambiguity) (rule end)
+         *     superTypes+=[Relation|QualifiedName] (ambiguity) (rule end)
+         */
+        protected void emit_ClassDeclaration_FullStopKeyword_4_1_or___LeftCurlyBracketKeyword_4_0_0_RightCurlyBracketKeyword_4_0_2__(EObject semanticObject, ISynNavigable transition, List<INode> nodes) {
+                acceptNodes(transition, nodes);
+        }
+        
+        /**
+         * Ambiguous syntax:
+         *     ';'?
+         *
+         * This ambiguous syntax occurs at:
+         *     referenceDeclarations+=ReferenceDeclaration (ambiguity) '}' (rule end)
+         *     referenceDeclarations+=ReferenceDeclaration (ambiguity) referenceDeclarations+=ReferenceDeclaration
+         */
+        protected void emit_ClassDeclaration_SemicolonKeyword_4_0_1_1_q(EObject semanticObject, ISynNavigable transition, List<INode> nodes) {
+                acceptNodes(transition, nodes);
+        }
+        
+        /**
+         * Ambiguous syntax:
+         *     ('{' '}') | '.'
+         *
+         * This ambiguous syntax occurs at:
+         *     name=Identifier (ambiguity) (rule end)
+         */
+        protected void emit_EnumDeclaration_FullStopKeyword_2_1_or___LeftCurlyBracketKeyword_2_0_0_RightCurlyBracketKeyword_2_0_2__(EObject semanticObject, ISynNavigable transition, List<INode> nodes) {
+                acceptNodes(transition, nodes);
+        }
+        
+        /**
+         * Ambiguous syntax:
+         *     (',' | ';')?
+         *
+         * This ambiguous syntax occurs at:
+         *     literals+=EnumLiteral (ambiguity) '}' (rule end)
+         */
+        protected void emit_EnumDeclaration___CommaKeyword_2_0_1_2_0_or_SemicolonKeyword_2_0_1_2_1__q(EObject semanticObject, ISynNavigable transition, List<INode> nodes) {
+                acceptNodes(transition, nodes);
+        }
+        
+        /**
+         * Ambiguous syntax:
+         *     'pred'?
+         *
+         * This ambiguous syntax occurs at:
+         *     error?='error' (ambiguity) name=Identifier
+         */
+        protected void emit_PredicateDefinition_PredKeyword_0_0_1_q(EObject semanticObject, ISynNavigable transition, List<INode> nodes) {
+                acceptNodes(transition, nodes);
+        }
+        
+        /**
+         * Ambiguous syntax:
+         *     'refers'?
+         *
+         * This ambiguous syntax occurs at:
+         *     (rule start) (ambiguity) referenceType=[Relation|QualifiedName]
+         */
+        protected void emit_ReferenceDeclaration_RefersKeyword_0_1_q(EObject semanticObject, ISynNavigable transition, List<INode> nodes) {
+                acceptNodes(transition, nodes);
+        }
+        
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java
new file mode 100644
index 00000000..4368036b
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/services/ProblemGrammarAccess.java
@@ -0,0 +1,1706 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.services;
+
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.util.List;
+import org.eclipse.xtext.Action;
+import org.eclipse.xtext.Alternatives;
+import org.eclipse.xtext.Assignment;
+import org.eclipse.xtext.CrossReference;
+import org.eclipse.xtext.EnumLiteralDeclaration;
+import org.eclipse.xtext.EnumRule;
+import org.eclipse.xtext.Grammar;
+import org.eclipse.xtext.GrammarUtil;
+import org.eclipse.xtext.Group;
+import org.eclipse.xtext.Keyword;
+import org.eclipse.xtext.ParserRule;
+import org.eclipse.xtext.RuleCall;
+import org.eclipse.xtext.TerminalRule;
+import org.eclipse.xtext.common.services.TerminalsGrammarAccess;
+import org.eclipse.xtext.service.AbstractElementFinder;
+import org.eclipse.xtext.service.GrammarProvider;
+
+@Singleton
+public class ProblemGrammarAccess extends AbstractElementFinder.AbstractGrammarElementFinder {
+        
+        public class ProblemElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Problem");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Group cGroup_0 = (Group)cGroup.eContents().get(0);
+                private final Keyword cProblemKeyword_0_0 = (Keyword)cGroup_0.eContents().get(0);
+                private final Assignment cNameAssignment_0_1 = (Assignment)cGroup_0.eContents().get(1);
+                private final RuleCall cNameIdentifierParserRuleCall_0_1_0 = (RuleCall)cNameAssignment_0_1.eContents().get(0);
+                private final Keyword cFullStopKeyword_0_2 = (Keyword)cGroup_0.eContents().get(2);
+                private final Assignment cStatementsAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final RuleCall cStatementsStatementParserRuleCall_1_0 = (RuleCall)cStatementsAssignment_1.eContents().get(0);
+                
+                //Problem:
+                //    ("problem" name=Identifier ".")?
+                //    statements+=Statement*;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //("problem" name=Identifier ".")?
+                //statements+=Statement*
+                public Group getGroup() { return cGroup; }
+                
+                //("problem" name=Identifier ".")?
+                public Group getGroup_0() { return cGroup_0; }
+                
+                //"problem"
+                public Keyword getProblemKeyword_0_0() { return cProblemKeyword_0_0; }
+                
+                //name=Identifier
+                public Assignment getNameAssignment_0_1() { return cNameAssignment_0_1; }
+                
+                //Identifier
+                public RuleCall getNameIdentifierParserRuleCall_0_1_0() { return cNameIdentifierParserRuleCall_0_1_0; }
+                
+                //"."
+                public Keyword getFullStopKeyword_0_2() { return cFullStopKeyword_0_2; }
+                
+                //statements+=Statement*
+                public Assignment getStatementsAssignment_1() { return cStatementsAssignment_1; }
+                
+                //Statement
+                public RuleCall getStatementsStatementParserRuleCall_1_0() { return cStatementsStatementParserRuleCall_1_0; }
+        }
+        public class StatementElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Statement");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cClassDeclarationParserRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final RuleCall cEnumDeclarationParserRuleCall_1 = (RuleCall)cAlternatives.eContents().get(1);
+                private final RuleCall cPredicateDefinitionParserRuleCall_2 = (RuleCall)cAlternatives.eContents().get(2);
+                private final RuleCall cAssertionParserRuleCall_3 = (RuleCall)cAlternatives.eContents().get(3);
+                private final RuleCall cScopeDeclarationParserRuleCall_4 = (RuleCall)cAlternatives.eContents().get(4);
+                
+                //Statement:
+                //    ClassDeclaration | EnumDeclaration | PredicateDefinition | Assertion | ScopeDeclaration;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //ClassDeclaration | EnumDeclaration | PredicateDefinition | Assertion | ScopeDeclaration
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //ClassDeclaration
+                public RuleCall getClassDeclarationParserRuleCall_0() { return cClassDeclarationParserRuleCall_0; }
+                
+                //EnumDeclaration
+                public RuleCall getEnumDeclarationParserRuleCall_1() { return cEnumDeclarationParserRuleCall_1; }
+                
+                //PredicateDefinition
+                public RuleCall getPredicateDefinitionParserRuleCall_2() { return cPredicateDefinitionParserRuleCall_2; }
+                
+                //Assertion
+                public RuleCall getAssertionParserRuleCall_3() { return cAssertionParserRuleCall_3; }
+                
+                //ScopeDeclaration
+                public RuleCall getScopeDeclarationParserRuleCall_4() { return cScopeDeclarationParserRuleCall_4; }
+        }
+        public class ClassDeclarationElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.ClassDeclaration");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Assignment cAbstractAssignment_0 = (Assignment)cGroup.eContents().get(0);
+                private final Keyword cAbstractAbstractKeyword_0_0 = (Keyword)cAbstractAssignment_0.eContents().get(0);
+                private final Keyword cClassKeyword_1 = (Keyword)cGroup.eContents().get(1);
+                private final Assignment cNameAssignment_2 = (Assignment)cGroup.eContents().get(2);
+                private final RuleCall cNameIdentifierParserRuleCall_2_0 = (RuleCall)cNameAssignment_2.eContents().get(0);
+                private final Group cGroup_3 = (Group)cGroup.eContents().get(3);
+                private final Keyword cExtendsKeyword_3_0 = (Keyword)cGroup_3.eContents().get(0);
+                private final Assignment cSuperTypesAssignment_3_1 = (Assignment)cGroup_3.eContents().get(1);
+                private final CrossReference cSuperTypesRelationCrossReference_3_1_0 = (CrossReference)cSuperTypesAssignment_3_1.eContents().get(0);
+                private final RuleCall cSuperTypesRelationQualifiedNameParserRuleCall_3_1_0_1 = (RuleCall)cSuperTypesRelationCrossReference_3_1_0.eContents().get(1);
+                private final Group cGroup_3_2 = (Group)cGroup_3.eContents().get(2);
+                private final Keyword cCommaKeyword_3_2_0 = (Keyword)cGroup_3_2.eContents().get(0);
+                private final Assignment cSuperTypesAssignment_3_2_1 = (Assignment)cGroup_3_2.eContents().get(1);
+                private final CrossReference cSuperTypesRelationCrossReference_3_2_1_0 = (CrossReference)cSuperTypesAssignment_3_2_1.eContents().get(0);
+                private final RuleCall cSuperTypesRelationQualifiedNameParserRuleCall_3_2_1_0_1 = (RuleCall)cSuperTypesRelationCrossReference_3_2_1_0.eContents().get(1);
+                private final Alternatives cAlternatives_4 = (Alternatives)cGroup.eContents().get(4);
+                private final Group cGroup_4_0 = (Group)cAlternatives_4.eContents().get(0);
+                private final Keyword cLeftCurlyBracketKeyword_4_0_0 = (Keyword)cGroup_4_0.eContents().get(0);
+                private final Group cGroup_4_0_1 = (Group)cGroup_4_0.eContents().get(1);
+                private final Assignment cReferenceDeclarationsAssignment_4_0_1_0 = (Assignment)cGroup_4_0_1.eContents().get(0);
+                private final RuleCall cReferenceDeclarationsReferenceDeclarationParserRuleCall_4_0_1_0_0 = (RuleCall)cReferenceDeclarationsAssignment_4_0_1_0.eContents().get(0);
+                private final Keyword cSemicolonKeyword_4_0_1_1 = (Keyword)cGroup_4_0_1.eContents().get(1);
+                private final Keyword cRightCurlyBracketKeyword_4_0_2 = (Keyword)cGroup_4_0.eContents().get(2);
+                private final Keyword cFullStopKeyword_4_1 = (Keyword)cAlternatives_4.eContents().get(1);
+                
+                //ClassDeclaration:
+                //    abstract?="abstract"? "class"
+                //    name=Identifier
+                //    ("extends" superTypes+=[Relation|QualifiedName] ("," superTypes+=[Relation|QualifiedName])*)?
+                //    ("{" (referenceDeclarations+=ReferenceDeclaration ";"?)* "}" | ".");
+                @Override public ParserRule getRule() { return rule; }
+                
+                //abstract?="abstract"? "class"
+                //name=Identifier
+                //("extends" superTypes+=[Relation|QualifiedName] ("," superTypes+=[Relation|QualifiedName])*)?
+                //("{" (referenceDeclarations+=ReferenceDeclaration ";"?)* "}" | ".")
+                public Group getGroup() { return cGroup; }
+                
+                //abstract?="abstract"?
+                public Assignment getAbstractAssignment_0() { return cAbstractAssignment_0; }
+                
+                //"abstract"
+                public Keyword getAbstractAbstractKeyword_0_0() { return cAbstractAbstractKeyword_0_0; }
+                
+                //"class"
+                public Keyword getClassKeyword_1() { return cClassKeyword_1; }
+                
+                //name=Identifier
+                public Assignment getNameAssignment_2() { return cNameAssignment_2; }
+                
+                //Identifier
+                public RuleCall getNameIdentifierParserRuleCall_2_0() { return cNameIdentifierParserRuleCall_2_0; }
+                
+                //("extends" superTypes+=[Relation|QualifiedName] ("," superTypes+=[Relation|QualifiedName])*)?
+                public Group getGroup_3() { return cGroup_3; }
+                
+                //"extends"
+                public Keyword getExtendsKeyword_3_0() { return cExtendsKeyword_3_0; }
+                
+                //superTypes+=[Relation|QualifiedName]
+                public Assignment getSuperTypesAssignment_3_1() { return cSuperTypesAssignment_3_1; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getSuperTypesRelationCrossReference_3_1_0() { return cSuperTypesRelationCrossReference_3_1_0; }
+                
+                //QualifiedName
+                public RuleCall getSuperTypesRelationQualifiedNameParserRuleCall_3_1_0_1() { return cSuperTypesRelationQualifiedNameParserRuleCall_3_1_0_1; }
+                
+                //("," superTypes+=[Relation|QualifiedName])*
+                public Group getGroup_3_2() { return cGroup_3_2; }
+                
+                //","
+                public Keyword getCommaKeyword_3_2_0() { return cCommaKeyword_3_2_0; }
+                
+                //superTypes+=[Relation|QualifiedName]
+                public Assignment getSuperTypesAssignment_3_2_1() { return cSuperTypesAssignment_3_2_1; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getSuperTypesRelationCrossReference_3_2_1_0() { return cSuperTypesRelationCrossReference_3_2_1_0; }
+                
+                //QualifiedName
+                public RuleCall getSuperTypesRelationQualifiedNameParserRuleCall_3_2_1_0_1() { return cSuperTypesRelationQualifiedNameParserRuleCall_3_2_1_0_1; }
+                
+                //("{" (referenceDeclarations+=ReferenceDeclaration ";"?)* "}" | ".")
+                public Alternatives getAlternatives_4() { return cAlternatives_4; }
+                
+                //"{" (referenceDeclarations+=ReferenceDeclaration ";"?)* "}"
+                public Group getGroup_4_0() { return cGroup_4_0; }
+                
+                //"{"
+                public Keyword getLeftCurlyBracketKeyword_4_0_0() { return cLeftCurlyBracketKeyword_4_0_0; }
+                
+                //(referenceDeclarations+=ReferenceDeclaration ";"?)*
+                public Group getGroup_4_0_1() { return cGroup_4_0_1; }
+                
+                //referenceDeclarations+=ReferenceDeclaration
+                public Assignment getReferenceDeclarationsAssignment_4_0_1_0() { return cReferenceDeclarationsAssignment_4_0_1_0; }
+                
+                //ReferenceDeclaration
+                public RuleCall getReferenceDeclarationsReferenceDeclarationParserRuleCall_4_0_1_0_0() { return cReferenceDeclarationsReferenceDeclarationParserRuleCall_4_0_1_0_0; }
+                
+                //";"?
+                public Keyword getSemicolonKeyword_4_0_1_1() { return cSemicolonKeyword_4_0_1_1; }
+                
+                //"}"
+                public Keyword getRightCurlyBracketKeyword_4_0_2() { return cRightCurlyBracketKeyword_4_0_2; }
+                
+                //"."
+                public Keyword getFullStopKeyword_4_1() { return cFullStopKeyword_4_1; }
+        }
+        public class EnumDeclarationElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.EnumDeclaration");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Keyword cEnumKeyword_0 = (Keyword)cGroup.eContents().get(0);
+                private final Assignment cNameAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final RuleCall cNameIdentifierParserRuleCall_1_0 = (RuleCall)cNameAssignment_1.eContents().get(0);
+                private final Alternatives cAlternatives_2 = (Alternatives)cGroup.eContents().get(2);
+                private final Group cGroup_2_0 = (Group)cAlternatives_2.eContents().get(0);
+                private final Keyword cLeftCurlyBracketKeyword_2_0_0 = (Keyword)cGroup_2_0.eContents().get(0);
+                private final Group cGroup_2_0_1 = (Group)cGroup_2_0.eContents().get(1);
+                private final Assignment cLiteralsAssignment_2_0_1_0 = (Assignment)cGroup_2_0_1.eContents().get(0);
+                private final RuleCall cLiteralsEnumLiteralParserRuleCall_2_0_1_0_0 = (RuleCall)cLiteralsAssignment_2_0_1_0.eContents().get(0);
+                private final Group cGroup_2_0_1_1 = (Group)cGroup_2_0_1.eContents().get(1);
+                private final Keyword cCommaKeyword_2_0_1_1_0 = (Keyword)cGroup_2_0_1_1.eContents().get(0);
+                private final Assignment cLiteralsAssignment_2_0_1_1_1 = (Assignment)cGroup_2_0_1_1.eContents().get(1);
+                private final RuleCall cLiteralsEnumLiteralParserRuleCall_2_0_1_1_1_0 = (RuleCall)cLiteralsAssignment_2_0_1_1_1.eContents().get(0);
+                private final Alternatives cAlternatives_2_0_1_2 = (Alternatives)cGroup_2_0_1.eContents().get(2);
+                private final Keyword cCommaKeyword_2_0_1_2_0 = (Keyword)cAlternatives_2_0_1_2.eContents().get(0);
+                private final Keyword cSemicolonKeyword_2_0_1_2_1 = (Keyword)cAlternatives_2_0_1_2.eContents().get(1);
+                private final Keyword cRightCurlyBracketKeyword_2_0_2 = (Keyword)cGroup_2_0.eContents().get(2);
+                private final Keyword cFullStopKeyword_2_1 = (Keyword)cAlternatives_2.eContents().get(1);
+                
+                //EnumDeclaration:
+                //    "enum"
+                //    name=Identifier
+                //    ("{" (literals+=EnumLiteral ("," literals+=EnumLiteral)* ("," | ";")?)? "}" | ".");
+                @Override public ParserRule getRule() { return rule; }
+                
+                //"enum"
+                //name=Identifier
+                //("{" (literals+=EnumLiteral ("," literals+=EnumLiteral)* ("," | ";")?)? "}" | ".")
+                public Group getGroup() { return cGroup; }
+                
+                //"enum"
+                public Keyword getEnumKeyword_0() { return cEnumKeyword_0; }
+                
+                //name=Identifier
+                public Assignment getNameAssignment_1() { return cNameAssignment_1; }
+                
+                //Identifier
+                public RuleCall getNameIdentifierParserRuleCall_1_0() { return cNameIdentifierParserRuleCall_1_0; }
+                
+                //("{" (literals+=EnumLiteral ("," literals+=EnumLiteral)* ("," | ";")?)? "}" | ".")
+                public Alternatives getAlternatives_2() { return cAlternatives_2; }
+                
+                //"{" (literals+=EnumLiteral ("," literals+=EnumLiteral)* ("," | ";")?)? "}"
+                public Group getGroup_2_0() { return cGroup_2_0; }
+                
+                //"{"
+                public Keyword getLeftCurlyBracketKeyword_2_0_0() { return cLeftCurlyBracketKeyword_2_0_0; }
+                
+                //(literals+=EnumLiteral ("," literals+=EnumLiteral)* ("," | ";")?)?
+                public Group getGroup_2_0_1() { return cGroup_2_0_1; }
+                
+                //literals+=EnumLiteral
+                public Assignment getLiteralsAssignment_2_0_1_0() { return cLiteralsAssignment_2_0_1_0; }
+                
+                //EnumLiteral
+                public RuleCall getLiteralsEnumLiteralParserRuleCall_2_0_1_0_0() { return cLiteralsEnumLiteralParserRuleCall_2_0_1_0_0; }
+                
+                //("," literals+=EnumLiteral)*
+                public Group getGroup_2_0_1_1() { return cGroup_2_0_1_1; }
+                
+                //","
+                public Keyword getCommaKeyword_2_0_1_1_0() { return cCommaKeyword_2_0_1_1_0; }
+                
+                //literals+=EnumLiteral
+                public Assignment getLiteralsAssignment_2_0_1_1_1() { return cLiteralsAssignment_2_0_1_1_1; }
+                
+                //EnumLiteral
+                public RuleCall getLiteralsEnumLiteralParserRuleCall_2_0_1_1_1_0() { return cLiteralsEnumLiteralParserRuleCall_2_0_1_1_1_0; }
+                
+                //("," | ";")?
+                public Alternatives getAlternatives_2_0_1_2() { return cAlternatives_2_0_1_2; }
+                
+                //","
+                public Keyword getCommaKeyword_2_0_1_2_0() { return cCommaKeyword_2_0_1_2_0; }
+                
+                //";"
+                public Keyword getSemicolonKeyword_2_0_1_2_1() { return cSemicolonKeyword_2_0_1_2_1; }
+                
+                //"}"
+                public Keyword getRightCurlyBracketKeyword_2_0_2() { return cRightCurlyBracketKeyword_2_0_2; }
+                
+                //"."
+                public Keyword getFullStopKeyword_2_1() { return cFullStopKeyword_2_1; }
+        }
+        public class EnumLiteralElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.EnumLiteral");
+                private final Assignment cNameAssignment = (Assignment)rule.eContents().get(1);
+                private final RuleCall cNameQuotedOrUnquotedIdParserRuleCall_0 = (RuleCall)cNameAssignment.eContents().get(0);
+                
+                //EnumLiteral returns Node:
+                //    name=QuotedOrUnquotedId;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //name=QuotedOrUnquotedId
+                public Assignment getNameAssignment() { return cNameAssignment; }
+                
+                //QuotedOrUnquotedId
+                public RuleCall getNameQuotedOrUnquotedIdParserRuleCall_0() { return cNameQuotedOrUnquotedIdParserRuleCall_0; }
+        }
+        public class ReferenceDeclarationElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.ReferenceDeclaration");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Alternatives cAlternatives_0 = (Alternatives)cGroup.eContents().get(0);
+                private final Assignment cContainmentAssignment_0_0 = (Assignment)cAlternatives_0.eContents().get(0);
+                private final Keyword cContainmentContainsKeyword_0_0_0 = (Keyword)cContainmentAssignment_0_0.eContents().get(0);
+                private final Keyword cRefersKeyword_0_1 = (Keyword)cAlternatives_0.eContents().get(1);
+                private final Assignment cReferenceTypeAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final CrossReference cReferenceTypeRelationCrossReference_1_0 = (CrossReference)cReferenceTypeAssignment_1.eContents().get(0);
+                private final RuleCall cReferenceTypeRelationQualifiedNameParserRuleCall_1_0_1 = (RuleCall)cReferenceTypeRelationCrossReference_1_0.eContents().get(1);
+                private final Group cGroup_2 = (Group)cGroup.eContents().get(2);
+                private final Keyword cLeftSquareBracketKeyword_2_0 = (Keyword)cGroup_2.eContents().get(0);
+                private final Assignment cMultiplicityAssignment_2_1 = (Assignment)cGroup_2.eContents().get(1);
+                private final RuleCall cMultiplicityMultiplicityParserRuleCall_2_1_0 = (RuleCall)cMultiplicityAssignment_2_1.eContents().get(0);
+                private final Keyword cRightSquareBracketKeyword_2_2 = (Keyword)cGroup_2.eContents().get(2);
+                private final Assignment cNameAssignment_3 = (Assignment)cGroup.eContents().get(3);
+                private final RuleCall cNameIdentifierParserRuleCall_3_0 = (RuleCall)cNameAssignment_3.eContents().get(0);
+                private final Group cGroup_4 = (Group)cGroup.eContents().get(4);
+                private final Keyword cOppositeKeyword_4_0 = (Keyword)cGroup_4.eContents().get(0);
+                private final Assignment cOppositeAssignment_4_1 = (Assignment)cGroup_4.eContents().get(1);
+                private final CrossReference cOppositeReferenceDeclarationCrossReference_4_1_0 = (CrossReference)cOppositeAssignment_4_1.eContents().get(0);
+                private final RuleCall cOppositeReferenceDeclarationQualifiedNameParserRuleCall_4_1_0_1 = (RuleCall)cOppositeReferenceDeclarationCrossReference_4_1_0.eContents().get(1);
+                
+                //ReferenceDeclaration:
+                //    (containment?="contains" | "refers")?
+                //    referenceType=[Relation|QualifiedName]
+                //    ("[" multiplicity=Multiplicity "]")?
+                //    name=Identifier
+                //    ("opposite" opposite=[ReferenceDeclaration|QualifiedName])?;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //(containment?="contains" | "refers")?
+                //referenceType=[Relation|QualifiedName]
+                //("[" multiplicity=Multiplicity "]")?
+                //name=Identifier
+                //("opposite" opposite=[ReferenceDeclaration|QualifiedName])?
+                public Group getGroup() { return cGroup; }
+                
+                //(containment?="contains" | "refers")?
+                public Alternatives getAlternatives_0() { return cAlternatives_0; }
+                
+                //containment?="contains"
+                public Assignment getContainmentAssignment_0_0() { return cContainmentAssignment_0_0; }
+                
+                //"contains"
+                public Keyword getContainmentContainsKeyword_0_0_0() { return cContainmentContainsKeyword_0_0_0; }
+                
+                //"refers"
+                public Keyword getRefersKeyword_0_1() { return cRefersKeyword_0_1; }
+                
+                //referenceType=[Relation|QualifiedName]
+                public Assignment getReferenceTypeAssignment_1() { return cReferenceTypeAssignment_1; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getReferenceTypeRelationCrossReference_1_0() { return cReferenceTypeRelationCrossReference_1_0; }
+                
+                //QualifiedName
+                public RuleCall getReferenceTypeRelationQualifiedNameParserRuleCall_1_0_1() { return cReferenceTypeRelationQualifiedNameParserRuleCall_1_0_1; }
+                
+                //("[" multiplicity=Multiplicity "]")?
+                public Group getGroup_2() { return cGroup_2; }
+                
+                //"["
+                public Keyword getLeftSquareBracketKeyword_2_0() { return cLeftSquareBracketKeyword_2_0; }
+                
+                //multiplicity=Multiplicity
+                public Assignment getMultiplicityAssignment_2_1() { return cMultiplicityAssignment_2_1; }
+                
+                //Multiplicity
+                public RuleCall getMultiplicityMultiplicityParserRuleCall_2_1_0() { return cMultiplicityMultiplicityParserRuleCall_2_1_0; }
+                
+                //"]"
+                public Keyword getRightSquareBracketKeyword_2_2() { return cRightSquareBracketKeyword_2_2; }
+                
+                //name=Identifier
+                public Assignment getNameAssignment_3() { return cNameAssignment_3; }
+                
+                //Identifier
+                public RuleCall getNameIdentifierParserRuleCall_3_0() { return cNameIdentifierParserRuleCall_3_0; }
+                
+                //("opposite" opposite=[ReferenceDeclaration|QualifiedName])?
+                public Group getGroup_4() { return cGroup_4; }
+                
+                //"opposite"
+                public Keyword getOppositeKeyword_4_0() { return cOppositeKeyword_4_0; }
+                
+                //opposite=[ReferenceDeclaration|QualifiedName]
+                public Assignment getOppositeAssignment_4_1() { return cOppositeAssignment_4_1; }
+                
+                //[ReferenceDeclaration|QualifiedName]
+                public CrossReference getOppositeReferenceDeclarationCrossReference_4_1_0() { return cOppositeReferenceDeclarationCrossReference_4_1_0; }
+                
+                //QualifiedName
+                public RuleCall getOppositeReferenceDeclarationQualifiedNameParserRuleCall_4_1_0_1() { return cOppositeReferenceDeclarationQualifiedNameParserRuleCall_4_1_0_1; }
+        }
+        public class PredicateDefinitionElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.PredicateDefinition");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Alternatives cAlternatives_0 = (Alternatives)cGroup.eContents().get(0);
+                private final Group cGroup_0_0 = (Group)cAlternatives_0.eContents().get(0);
+                private final Assignment cErrorAssignment_0_0_0 = (Assignment)cGroup_0_0.eContents().get(0);
+                private final Keyword cErrorErrorKeyword_0_0_0_0 = (Keyword)cErrorAssignment_0_0_0.eContents().get(0);
+                private final Keyword cPredKeyword_0_0_1 = (Keyword)cGroup_0_0.eContents().get(1);
+                private final Keyword cPredKeyword_0_1 = (Keyword)cAlternatives_0.eContents().get(1);
+                private final Assignment cNameAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final RuleCall cNameIdentifierParserRuleCall_1_0 = (RuleCall)cNameAssignment_1.eContents().get(0);
+                private final Keyword cLeftParenthesisKeyword_2 = (Keyword)cGroup.eContents().get(2);
+                private final Group cGroup_3 = (Group)cGroup.eContents().get(3);
+                private final Assignment cParametersAssignment_3_0 = (Assignment)cGroup_3.eContents().get(0);
+                private final RuleCall cParametersParameterParserRuleCall_3_0_0 = (RuleCall)cParametersAssignment_3_0.eContents().get(0);
+                private final Group cGroup_3_1 = (Group)cGroup_3.eContents().get(1);
+                private final Keyword cCommaKeyword_3_1_0 = (Keyword)cGroup_3_1.eContents().get(0);
+                private final Assignment cParametersAssignment_3_1_1 = (Assignment)cGroup_3_1.eContents().get(1);
+                private final RuleCall cParametersParameterParserRuleCall_3_1_1_0 = (RuleCall)cParametersAssignment_3_1_1.eContents().get(0);
+                private final Keyword cRightParenthesisKeyword_4 = (Keyword)cGroup.eContents().get(4);
+                private final Group cGroup_5 = (Group)cGroup.eContents().get(5);
+                private final Keyword cColonHyphenMinusKeyword_5_0 = (Keyword)cGroup_5.eContents().get(0);
+                private final Assignment cBodiesAssignment_5_1 = (Assignment)cGroup_5.eContents().get(1);
+                private final RuleCall cBodiesConjunctionParserRuleCall_5_1_0 = (RuleCall)cBodiesAssignment_5_1.eContents().get(0);
+                private final Group cGroup_5_2 = (Group)cGroup_5.eContents().get(2);
+                private final Keyword cSemicolonKeyword_5_2_0 = (Keyword)cGroup_5_2.eContents().get(0);
+                private final Assignment cBodiesAssignment_5_2_1 = (Assignment)cGroup_5_2.eContents().get(1);
+                private final RuleCall cBodiesConjunctionParserRuleCall_5_2_1_0 = (RuleCall)cBodiesAssignment_5_2_1.eContents().get(0);
+                private final Keyword cFullStopKeyword_6 = (Keyword)cGroup.eContents().get(6);
+                
+                //PredicateDefinition:
+                //    (error?="error" "pred"? | "pred")
+                //    name=Identifier
+                //    "(" (parameters+=Parameter ("," parameters+=Parameter)*)? ")"
+                //    (":-" bodies+=Conjunction (";" bodies+=Conjunction)*)?
+                //    ".";
+                @Override public ParserRule getRule() { return rule; }
+                
+                //(error?="error" "pred"? | "pred")
+                //name=Identifier
+                //"(" (parameters+=Parameter ("," parameters+=Parameter)*)? ")"
+                //(":-" bodies+=Conjunction (";" bodies+=Conjunction)*)?
+                //"."
+                public Group getGroup() { return cGroup; }
+                
+                //(error?="error" "pred"? | "pred")
+                public Alternatives getAlternatives_0() { return cAlternatives_0; }
+                
+                //error?="error" "pred"?
+                public Group getGroup_0_0() { return cGroup_0_0; }
+                
+                //error?="error"
+                public Assignment getErrorAssignment_0_0_0() { return cErrorAssignment_0_0_0; }
+                
+                //"error"
+                public Keyword getErrorErrorKeyword_0_0_0_0() { return cErrorErrorKeyword_0_0_0_0; }
+                
+                //"pred"?
+                public Keyword getPredKeyword_0_0_1() { return cPredKeyword_0_0_1; }
+                
+                //"pred"
+                public Keyword getPredKeyword_0_1() { return cPredKeyword_0_1; }
+                
+                //name=Identifier
+                public Assignment getNameAssignment_1() { return cNameAssignment_1; }
+                
+                //Identifier
+                public RuleCall getNameIdentifierParserRuleCall_1_0() { return cNameIdentifierParserRuleCall_1_0; }
+                
+                //"("
+                public Keyword getLeftParenthesisKeyword_2() { return cLeftParenthesisKeyword_2; }
+                
+                //(parameters+=Parameter ("," parameters+=Parameter)*)?
+                public Group getGroup_3() { return cGroup_3; }
+                
+                //parameters+=Parameter
+                public Assignment getParametersAssignment_3_0() { return cParametersAssignment_3_0; }
+                
+                //Parameter
+                public RuleCall getParametersParameterParserRuleCall_3_0_0() { return cParametersParameterParserRuleCall_3_0_0; }
+                
+                //("," parameters+=Parameter)*
+                public Group getGroup_3_1() { return cGroup_3_1; }
+                
+                //","
+                public Keyword getCommaKeyword_3_1_0() { return cCommaKeyword_3_1_0; }
+                
+                //parameters+=Parameter
+                public Assignment getParametersAssignment_3_1_1() { return cParametersAssignment_3_1_1; }
+                
+                //Parameter
+                public RuleCall getParametersParameterParserRuleCall_3_1_1_0() { return cParametersParameterParserRuleCall_3_1_1_0; }
+                
+                //")"
+                public Keyword getRightParenthesisKeyword_4() { return cRightParenthesisKeyword_4; }
+                
+                //(":-" bodies+=Conjunction (";" bodies+=Conjunction)*)?
+                public Group getGroup_5() { return cGroup_5; }
+                
+                //":-"
+                public Keyword getColonHyphenMinusKeyword_5_0() { return cColonHyphenMinusKeyword_5_0; }
+                
+                //bodies+=Conjunction
+                public Assignment getBodiesAssignment_5_1() { return cBodiesAssignment_5_1; }
+                
+                //Conjunction
+                public RuleCall getBodiesConjunctionParserRuleCall_5_1_0() { return cBodiesConjunctionParserRuleCall_5_1_0; }
+                
+                //(";" bodies+=Conjunction)*
+                public Group getGroup_5_2() { return cGroup_5_2; }
+                
+                //";"
+                public Keyword getSemicolonKeyword_5_2_0() { return cSemicolonKeyword_5_2_0; }
+                
+                //bodies+=Conjunction
+                public Assignment getBodiesAssignment_5_2_1() { return cBodiesAssignment_5_2_1; }
+                
+                //Conjunction
+                public RuleCall getBodiesConjunctionParserRuleCall_5_2_1_0() { return cBodiesConjunctionParserRuleCall_5_2_1_0; }
+                
+                //"."
+                public Keyword getFullStopKeyword_6() { return cFullStopKeyword_6; }
+        }
+        public class ParameterElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Parameter");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Assignment cParameterTypeAssignment_0 = (Assignment)cGroup.eContents().get(0);
+                private final CrossReference cParameterTypeRelationCrossReference_0_0 = (CrossReference)cParameterTypeAssignment_0.eContents().get(0);
+                private final RuleCall cParameterTypeRelationQualifiedNameParserRuleCall_0_0_1 = (RuleCall)cParameterTypeRelationCrossReference_0_0.eContents().get(1);
+                private final Assignment cNameAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final RuleCall cNameIdentifierParserRuleCall_1_0 = (RuleCall)cNameAssignment_1.eContents().get(0);
+                
+                //Parameter:
+                //    parameterType=[Relation|QualifiedName]? name=Identifier;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //parameterType=[Relation|QualifiedName]? name=Identifier
+                public Group getGroup() { return cGroup; }
+                
+                //parameterType=[Relation|QualifiedName]?
+                public Assignment getParameterTypeAssignment_0() { return cParameterTypeAssignment_0; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getParameterTypeRelationCrossReference_0_0() { return cParameterTypeRelationCrossReference_0_0; }
+                
+                //QualifiedName
+                public RuleCall getParameterTypeRelationQualifiedNameParserRuleCall_0_0_1() { return cParameterTypeRelationQualifiedNameParserRuleCall_0_0_1; }
+                
+                //name=Identifier
+                public Assignment getNameAssignment_1() { return cNameAssignment_1; }
+                
+                //Identifier
+                public RuleCall getNameIdentifierParserRuleCall_1_0() { return cNameIdentifierParserRuleCall_1_0; }
+        }
+        public class ConjunctionElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Conjunction");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Assignment cLiteralsAssignment_0 = (Assignment)cGroup.eContents().get(0);
+                private final RuleCall cLiteralsLiteralParserRuleCall_0_0 = (RuleCall)cLiteralsAssignment_0.eContents().get(0);
+                private final Group cGroup_1 = (Group)cGroup.eContents().get(1);
+                private final Keyword cCommaKeyword_1_0 = (Keyword)cGroup_1.eContents().get(0);
+                private final Assignment cLiteralsAssignment_1_1 = (Assignment)cGroup_1.eContents().get(1);
+                private final RuleCall cLiteralsLiteralParserRuleCall_1_1_0 = (RuleCall)cLiteralsAssignment_1_1.eContents().get(0);
+                
+                //Conjunction:
+                //    literals+=Literal ("," literals+=Literal)*;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //literals+=Literal ("," literals+=Literal)*
+                public Group getGroup() { return cGroup; }
+                
+                //literals+=Literal
+                public Assignment getLiteralsAssignment_0() { return cLiteralsAssignment_0; }
+                
+                //Literal
+                public RuleCall getLiteralsLiteralParserRuleCall_0_0() { return cLiteralsLiteralParserRuleCall_0_0; }
+                
+                //("," literals+=Literal)*
+                public Group getGroup_1() { return cGroup_1; }
+                
+                //","
+                public Keyword getCommaKeyword_1_0() { return cCommaKeyword_1_0; }
+                
+                //literals+=Literal
+                public Assignment getLiteralsAssignment_1_1() { return cLiteralsAssignment_1_1; }
+                
+                //Literal
+                public RuleCall getLiteralsLiteralParserRuleCall_1_1_0() { return cLiteralsLiteralParserRuleCall_1_1_0; }
+        }
+        public class LiteralElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Literal");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cAtomParserRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final RuleCall cNegativeLiteralParserRuleCall_1 = (RuleCall)cAlternatives.eContents().get(1);
+                
+                //Literal:
+                //    Atom | NegativeLiteral;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //Atom | NegativeLiteral
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //Atom
+                public RuleCall getAtomParserRuleCall_0() { return cAtomParserRuleCall_0; }
+                
+                //NegativeLiteral
+                public RuleCall getNegativeLiteralParserRuleCall_1() { return cNegativeLiteralParserRuleCall_1; }
+        }
+        public class NegativeLiteralElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.NegativeLiteral");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Keyword cExclamationMarkKeyword_0 = (Keyword)cGroup.eContents().get(0);
+                private final Assignment cAtomAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final RuleCall cAtomAtomParserRuleCall_1_0 = (RuleCall)cAtomAssignment_1.eContents().get(0);
+                
+                //NegativeLiteral:
+                //    "!" atom=Atom;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //"!" atom=Atom
+                public Group getGroup() { return cGroup; }
+                
+                //"!"
+                public Keyword getExclamationMarkKeyword_0() { return cExclamationMarkKeyword_0; }
+                
+                //atom=Atom
+                public Assignment getAtomAssignment_1() { return cAtomAssignment_1; }
+                
+                //Atom
+                public RuleCall getAtomAtomParserRuleCall_1_0() { return cAtomAtomParserRuleCall_1_0; }
+        }
+        public class AtomElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Atom");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Assignment cRelationAssignment_0 = (Assignment)cGroup.eContents().get(0);
+                private final CrossReference cRelationRelationCrossReference_0_0 = (CrossReference)cRelationAssignment_0.eContents().get(0);
+                private final RuleCall cRelationRelationQualifiedNameParserRuleCall_0_0_1 = (RuleCall)cRelationRelationCrossReference_0_0.eContents().get(1);
+                private final Assignment cTransitiveClosureAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final Keyword cTransitiveClosurePlusSignKeyword_1_0 = (Keyword)cTransitiveClosureAssignment_1.eContents().get(0);
+                private final Keyword cLeftParenthesisKeyword_2 = (Keyword)cGroup.eContents().get(2);
+                private final Group cGroup_3 = (Group)cGroup.eContents().get(3);
+                private final Assignment cArgumentsAssignment_3_0 = (Assignment)cGroup_3.eContents().get(0);
+                private final RuleCall cArgumentsArgumentParserRuleCall_3_0_0 = (RuleCall)cArgumentsAssignment_3_0.eContents().get(0);
+                private final Group cGroup_3_1 = (Group)cGroup_3.eContents().get(1);
+                private final Keyword cCommaKeyword_3_1_0 = (Keyword)cGroup_3_1.eContents().get(0);
+                private final Assignment cArgumentsAssignment_3_1_1 = (Assignment)cGroup_3_1.eContents().get(1);
+                private final RuleCall cArgumentsArgumentParserRuleCall_3_1_1_0 = (RuleCall)cArgumentsAssignment_3_1_1.eContents().get(0);
+                private final Keyword cRightParenthesisKeyword_4 = (Keyword)cGroup.eContents().get(4);
+                
+                //Atom:
+                //    relation=[Relation|QualifiedName]
+                //    transitiveClosure?="+"?
+                //    "(" (arguments+=Argument ("," arguments+=Argument)*)? ")";
+                @Override public ParserRule getRule() { return rule; }
+                
+                //relation=[Relation|QualifiedName]
+                //transitiveClosure?="+"?
+                //"(" (arguments+=Argument ("," arguments+=Argument)*)? ")"
+                public Group getGroup() { return cGroup; }
+                
+                //relation=[Relation|QualifiedName]
+                public Assignment getRelationAssignment_0() { return cRelationAssignment_0; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getRelationRelationCrossReference_0_0() { return cRelationRelationCrossReference_0_0; }
+                
+                //QualifiedName
+                public RuleCall getRelationRelationQualifiedNameParserRuleCall_0_0_1() { return cRelationRelationQualifiedNameParserRuleCall_0_0_1; }
+                
+                //transitiveClosure?="+"?
+                public Assignment getTransitiveClosureAssignment_1() { return cTransitiveClosureAssignment_1; }
+                
+                //"+"
+                public Keyword getTransitiveClosurePlusSignKeyword_1_0() { return cTransitiveClosurePlusSignKeyword_1_0; }
+                
+                //"("
+                public Keyword getLeftParenthesisKeyword_2() { return cLeftParenthesisKeyword_2; }
+                
+                //(arguments+=Argument ("," arguments+=Argument)*)?
+                public Group getGroup_3() { return cGroup_3; }
+                
+                //arguments+=Argument
+                public Assignment getArgumentsAssignment_3_0() { return cArgumentsAssignment_3_0; }
+                
+                //Argument
+                public RuleCall getArgumentsArgumentParserRuleCall_3_0_0() { return cArgumentsArgumentParserRuleCall_3_0_0; }
+                
+                //("," arguments+=Argument)*
+                public Group getGroup_3_1() { return cGroup_3_1; }
+                
+                //","
+                public Keyword getCommaKeyword_3_1_0() { return cCommaKeyword_3_1_0; }
+                
+                //arguments+=Argument
+                public Assignment getArgumentsAssignment_3_1_1() { return cArgumentsAssignment_3_1_1; }
+                
+                //Argument
+                public RuleCall getArgumentsArgumentParserRuleCall_3_1_1_0() { return cArgumentsArgumentParserRuleCall_3_1_1_0; }
+                
+                //")"
+                public Keyword getRightParenthesisKeyword_4() { return cRightParenthesisKeyword_4; }
+        }
+        public class ArgumentElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Argument");
+                private final Assignment cVariableOrNodeAssignment = (Assignment)rule.eContents().get(1);
+                private final CrossReference cVariableOrNodeVariableOrNodeCrossReference_0 = (CrossReference)cVariableOrNodeAssignment.eContents().get(0);
+                private final RuleCall cVariableOrNodeVariableOrNodeQualifiedNameParserRuleCall_0_1 = (RuleCall)cVariableOrNodeVariableOrNodeCrossReference_0.eContents().get(1);
+                
+                //Argument:
+                //    variableOrNode=[VariableOrNode|QualifiedName];
+                @Override public ParserRule getRule() { return rule; }
+                
+                //variableOrNode=[VariableOrNode|QualifiedName]
+                public Assignment getVariableOrNodeAssignment() { return cVariableOrNodeAssignment; }
+                
+                //[VariableOrNode|QualifiedName]
+                public CrossReference getVariableOrNodeVariableOrNodeCrossReference_0() { return cVariableOrNodeVariableOrNodeCrossReference_0; }
+                
+                //QualifiedName
+                public RuleCall getVariableOrNodeVariableOrNodeQualifiedNameParserRuleCall_0_1() { return cVariableOrNodeVariableOrNodeQualifiedNameParserRuleCall_0_1; }
+        }
+        public class AssertionElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Assertion");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Alternatives cAlternatives_0 = (Alternatives)cGroup.eContents().get(0);
+                private final Group cGroup_0_0 = (Group)cAlternatives_0.eContents().get(0);
+                private final Assignment cRelationAssignment_0_0_0 = (Assignment)cGroup_0_0.eContents().get(0);
+                private final CrossReference cRelationRelationCrossReference_0_0_0_0 = (CrossReference)cRelationAssignment_0_0_0.eContents().get(0);
+                private final RuleCall cRelationRelationQualifiedNameParserRuleCall_0_0_0_0_1 = (RuleCall)cRelationRelationCrossReference_0_0_0_0.eContents().get(1);
+                private final Keyword cLeftParenthesisKeyword_0_0_1 = (Keyword)cGroup_0_0.eContents().get(1);
+                private final Group cGroup_0_0_2 = (Group)cGroup_0_0.eContents().get(2);
+                private final Assignment cArgumentsAssignment_0_0_2_0 = (Assignment)cGroup_0_0_2.eContents().get(0);
+                private final CrossReference cArgumentsNodeCrossReference_0_0_2_0_0 = (CrossReference)cArgumentsAssignment_0_0_2_0.eContents().get(0);
+                private final RuleCall cArgumentsNodeQualifiedNameParserRuleCall_0_0_2_0_0_1 = (RuleCall)cArgumentsNodeCrossReference_0_0_2_0_0.eContents().get(1);
+                private final Group cGroup_0_0_2_1 = (Group)cGroup_0_0_2.eContents().get(1);
+                private final Keyword cCommaKeyword_0_0_2_1_0 = (Keyword)cGroup_0_0_2_1.eContents().get(0);
+                private final Assignment cArgumentsAssignment_0_0_2_1_1 = (Assignment)cGroup_0_0_2_1.eContents().get(1);
+                private final CrossReference cArgumentsNodeCrossReference_0_0_2_1_1_0 = (CrossReference)cArgumentsAssignment_0_0_2_1_1.eContents().get(0);
+                private final RuleCall cArgumentsNodeQualifiedNameParserRuleCall_0_0_2_1_1_0_1 = (RuleCall)cArgumentsNodeCrossReference_0_0_2_1_1_0.eContents().get(1);
+                private final Keyword cRightParenthesisKeyword_0_0_3 = (Keyword)cGroup_0_0.eContents().get(3);
+                private final Keyword cColonKeyword_0_0_4 = (Keyword)cGroup_0_0.eContents().get(4);
+                private final Assignment cValueAssignment_0_0_5 = (Assignment)cGroup_0_0.eContents().get(5);
+                private final RuleCall cValueLogicValueEnumRuleCall_0_0_5_0 = (RuleCall)cValueAssignment_0_0_5.eContents().get(0);
+                private final Group cGroup_0_1 = (Group)cAlternatives_0.eContents().get(1);
+                private final Assignment cValueAssignment_0_1_0 = (Assignment)cGroup_0_1.eContents().get(0);
+                private final RuleCall cValueShortLogicValueEnumRuleCall_0_1_0_0 = (RuleCall)cValueAssignment_0_1_0.eContents().get(0);
+                private final Assignment cRelationAssignment_0_1_1 = (Assignment)cGroup_0_1.eContents().get(1);
+                private final CrossReference cRelationRelationCrossReference_0_1_1_0 = (CrossReference)cRelationAssignment_0_1_1.eContents().get(0);
+                private final RuleCall cRelationRelationQualifiedNameParserRuleCall_0_1_1_0_1 = (RuleCall)cRelationRelationCrossReference_0_1_1_0.eContents().get(1);
+                private final Keyword cLeftParenthesisKeyword_0_1_2 = (Keyword)cGroup_0_1.eContents().get(2);
+                private final Group cGroup_0_1_3 = (Group)cGroup_0_1.eContents().get(3);
+                private final Assignment cArgumentsAssignment_0_1_3_0 = (Assignment)cGroup_0_1_3.eContents().get(0);
+                private final CrossReference cArgumentsNodeCrossReference_0_1_3_0_0 = (CrossReference)cArgumentsAssignment_0_1_3_0.eContents().get(0);
+                private final RuleCall cArgumentsNodeQualifiedNameParserRuleCall_0_1_3_0_0_1 = (RuleCall)cArgumentsNodeCrossReference_0_1_3_0_0.eContents().get(1);
+                private final Group cGroup_0_1_3_1 = (Group)cGroup_0_1_3.eContents().get(1);
+                private final Keyword cCommaKeyword_0_1_3_1_0 = (Keyword)cGroup_0_1_3_1.eContents().get(0);
+                private final Assignment cArgumentsAssignment_0_1_3_1_1 = (Assignment)cGroup_0_1_3_1.eContents().get(1);
+                private final CrossReference cArgumentsNodeCrossReference_0_1_3_1_1_0 = (CrossReference)cArgumentsAssignment_0_1_3_1_1.eContents().get(0);
+                private final RuleCall cArgumentsNodeQualifiedNameParserRuleCall_0_1_3_1_1_0_1 = (RuleCall)cArgumentsNodeCrossReference_0_1_3_1_1_0.eContents().get(1);
+                private final Keyword cRightParenthesisKeyword_0_1_4 = (Keyword)cGroup_0_1.eContents().get(4);
+                private final Keyword cFullStopKeyword_1 = (Keyword)cGroup.eContents().get(1);
+                
+                //Assertion:
+                //    (relation=[Relation|QualifiedName]
+                //    "(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")"
+                //    ":" value=LogicValue |
+                //    value=ShortLogicValue?
+                //    relation=[Relation|QualifiedName]
+                //    "(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")")
+                //    ".";
+                @Override public ParserRule getRule() { return rule; }
+                
+                //(relation=[Relation|QualifiedName]
+                //"(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")"
+                //":" value=LogicValue |
+                //value=ShortLogicValue?
+                //relation=[Relation|QualifiedName]
+                //"(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")")
+                //"."
+                public Group getGroup() { return cGroup; }
+                
+                //(relation=[Relation|QualifiedName]
+                //"(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")"
+                //":" value=LogicValue |
+                //value=ShortLogicValue?
+                //relation=[Relation|QualifiedName]
+                //"(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")")
+                public Alternatives getAlternatives_0() { return cAlternatives_0; }
+                
+                //relation=[Relation|QualifiedName]
+                //    "(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")"
+                //    ":" value=LogicValue
+                public Group getGroup_0_0() { return cGroup_0_0; }
+                
+                //relation=[Relation|QualifiedName]
+                public Assignment getRelationAssignment_0_0_0() { return cRelationAssignment_0_0_0; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getRelationRelationCrossReference_0_0_0_0() { return cRelationRelationCrossReference_0_0_0_0; }
+                
+                //QualifiedName
+                public RuleCall getRelationRelationQualifiedNameParserRuleCall_0_0_0_0_1() { return cRelationRelationQualifiedNameParserRuleCall_0_0_0_0_1; }
+                
+                //"("
+                public Keyword getLeftParenthesisKeyword_0_0_1() { return cLeftParenthesisKeyword_0_0_1; }
+                
+                //(arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)?
+                public Group getGroup_0_0_2() { return cGroup_0_0_2; }
+                
+                //arguments+=[Node|QualifiedName]
+                public Assignment getArgumentsAssignment_0_0_2_0() { return cArgumentsAssignment_0_0_2_0; }
+                
+                //[Node|QualifiedName]
+                public CrossReference getArgumentsNodeCrossReference_0_0_2_0_0() { return cArgumentsNodeCrossReference_0_0_2_0_0; }
+                
+                //QualifiedName
+                public RuleCall getArgumentsNodeQualifiedNameParserRuleCall_0_0_2_0_0_1() { return cArgumentsNodeQualifiedNameParserRuleCall_0_0_2_0_0_1; }
+                
+                //("," arguments+=[Node|QualifiedName])*
+                public Group getGroup_0_0_2_1() { return cGroup_0_0_2_1; }
+                
+                //","
+                public Keyword getCommaKeyword_0_0_2_1_0() { return cCommaKeyword_0_0_2_1_0; }
+                
+                //arguments+=[Node|QualifiedName]
+                public Assignment getArgumentsAssignment_0_0_2_1_1() { return cArgumentsAssignment_0_0_2_1_1; }
+                
+                //[Node|QualifiedName]
+                public CrossReference getArgumentsNodeCrossReference_0_0_2_1_1_0() { return cArgumentsNodeCrossReference_0_0_2_1_1_0; }
+                
+                //QualifiedName
+                public RuleCall getArgumentsNodeQualifiedNameParserRuleCall_0_0_2_1_1_0_1() { return cArgumentsNodeQualifiedNameParserRuleCall_0_0_2_1_1_0_1; }
+                
+                //")"
+                public Keyword getRightParenthesisKeyword_0_0_3() { return cRightParenthesisKeyword_0_0_3; }
+                
+                //":"
+                public Keyword getColonKeyword_0_0_4() { return cColonKeyword_0_0_4; }
+                
+                //value=LogicValue
+                public Assignment getValueAssignment_0_0_5() { return cValueAssignment_0_0_5; }
+                
+                //LogicValue
+                public RuleCall getValueLogicValueEnumRuleCall_0_0_5_0() { return cValueLogicValueEnumRuleCall_0_0_5_0; }
+                
+                //value=ShortLogicValue?
+                //relation=[Relation|QualifiedName]
+                //"(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")"
+                public Group getGroup_0_1() { return cGroup_0_1; }
+                
+                //value=ShortLogicValue?
+                public Assignment getValueAssignment_0_1_0() { return cValueAssignment_0_1_0; }
+                
+                //ShortLogicValue
+                public RuleCall getValueShortLogicValueEnumRuleCall_0_1_0_0() { return cValueShortLogicValueEnumRuleCall_0_1_0_0; }
+                
+                //relation=[Relation|QualifiedName]
+                public Assignment getRelationAssignment_0_1_1() { return cRelationAssignment_0_1_1; }
+                
+                //[Relation|QualifiedName]
+                public CrossReference getRelationRelationCrossReference_0_1_1_0() { return cRelationRelationCrossReference_0_1_1_0; }
+                
+                //QualifiedName
+                public RuleCall getRelationRelationQualifiedNameParserRuleCall_0_1_1_0_1() { return cRelationRelationQualifiedNameParserRuleCall_0_1_1_0_1; }
+                
+                //"("
+                public Keyword getLeftParenthesisKeyword_0_1_2() { return cLeftParenthesisKeyword_0_1_2; }
+                
+                //(arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)?
+                public Group getGroup_0_1_3() { return cGroup_0_1_3; }
+                
+                //arguments+=[Node|QualifiedName]
+                public Assignment getArgumentsAssignment_0_1_3_0() { return cArgumentsAssignment_0_1_3_0; }
+                
+                //[Node|QualifiedName]
+                public CrossReference getArgumentsNodeCrossReference_0_1_3_0_0() { return cArgumentsNodeCrossReference_0_1_3_0_0; }
+                
+                //QualifiedName
+                public RuleCall getArgumentsNodeQualifiedNameParserRuleCall_0_1_3_0_0_1() { return cArgumentsNodeQualifiedNameParserRuleCall_0_1_3_0_0_1; }
+                
+                //("," arguments+=[Node|QualifiedName])*
+                public Group getGroup_0_1_3_1() { return cGroup_0_1_3_1; }
+                
+                //","
+                public Keyword getCommaKeyword_0_1_3_1_0() { return cCommaKeyword_0_1_3_1_0; }
+                
+                //arguments+=[Node|QualifiedName]
+                public Assignment getArgumentsAssignment_0_1_3_1_1() { return cArgumentsAssignment_0_1_3_1_1; }
+                
+                //[Node|QualifiedName]
+                public CrossReference getArgumentsNodeCrossReference_0_1_3_1_1_0() { return cArgumentsNodeCrossReference_0_1_3_1_1_0; }
+                
+                //QualifiedName
+                public RuleCall getArgumentsNodeQualifiedNameParserRuleCall_0_1_3_1_1_0_1() { return cArgumentsNodeQualifiedNameParserRuleCall_0_1_3_1_1_0_1; }
+                
+                //")"
+                public Keyword getRightParenthesisKeyword_0_1_4() { return cRightParenthesisKeyword_0_1_4; }
+                
+                //"."
+                public Keyword getFullStopKeyword_1() { return cFullStopKeyword_1; }
+        }
+        public class ScopeDeclarationElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.ScopeDeclaration");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Keyword cScopeKeyword_0 = (Keyword)cGroup.eContents().get(0);
+                private final Assignment cTypeScopesAssignment_1 = (Assignment)cGroup.eContents().get(1);
+                private final RuleCall cTypeScopesTypeScopeParserRuleCall_1_0 = (RuleCall)cTypeScopesAssignment_1.eContents().get(0);
+                private final Group cGroup_2 = (Group)cGroup.eContents().get(2);
+                private final Keyword cCommaKeyword_2_0 = (Keyword)cGroup_2.eContents().get(0);
+                private final Assignment cTypeScopesAssignment_2_1 = (Assignment)cGroup_2.eContents().get(1);
+                private final RuleCall cTypeScopesTypeScopeParserRuleCall_2_1_0 = (RuleCall)cTypeScopesAssignment_2_1.eContents().get(0);
+                private final Keyword cFullStopKeyword_3 = (Keyword)cGroup.eContents().get(3);
+                
+                //ScopeDeclaration:
+                //    "scope" typeScopes+=TypeScope ("," typeScopes+=TypeScope)* ".";
+                @Override public ParserRule getRule() { return rule; }
+                
+                //"scope" typeScopes+=TypeScope ("," typeScopes+=TypeScope)* "."
+                public Group getGroup() { return cGroup; }
+                
+                //"scope"
+                public Keyword getScopeKeyword_0() { return cScopeKeyword_0; }
+                
+                //typeScopes+=TypeScope
+                public Assignment getTypeScopesAssignment_1() { return cTypeScopesAssignment_1; }
+                
+                //TypeScope
+                public RuleCall getTypeScopesTypeScopeParserRuleCall_1_0() { return cTypeScopesTypeScopeParserRuleCall_1_0; }
+                
+                //("," typeScopes+=TypeScope)*
+                public Group getGroup_2() { return cGroup_2; }
+                
+                //","
+                public Keyword getCommaKeyword_2_0() { return cCommaKeyword_2_0; }
+                
+                //typeScopes+=TypeScope
+                public Assignment getTypeScopesAssignment_2_1() { return cTypeScopesAssignment_2_1; }
+                
+                //TypeScope
+                public RuleCall getTypeScopesTypeScopeParserRuleCall_2_1_0() { return cTypeScopesTypeScopeParserRuleCall_2_1_0; }
+                
+                //"."
+                public Keyword getFullStopKeyword_3() { return cFullStopKeyword_3; }
+        }
+        public class TypeScopeElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.TypeScope");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Assignment cTargetTypeAssignment_0 = (Assignment)cGroup.eContents().get(0);
+                private final CrossReference cTargetTypeClassDeclarationCrossReference_0_0 = (CrossReference)cTargetTypeAssignment_0.eContents().get(0);
+                private final RuleCall cTargetTypeClassDeclarationIDTerminalRuleCall_0_0_1 = (RuleCall)cTargetTypeClassDeclarationCrossReference_0_0.eContents().get(1);
+                private final Alternatives cAlternatives_1 = (Alternatives)cGroup.eContents().get(1);
+                private final Assignment cIncrementAssignment_1_0 = (Assignment)cAlternatives_1.eContents().get(0);
+                private final Keyword cIncrementPlusSignEqualsSignKeyword_1_0_0 = (Keyword)cIncrementAssignment_1_0.eContents().get(0);
+                private final Keyword cEqualsSignKeyword_1_1 = (Keyword)cAlternatives_1.eContents().get(1);
+                private final Assignment cMultiplicityAssignment_2 = (Assignment)cGroup.eContents().get(2);
+                private final RuleCall cMultiplicityDefiniteMultiplicityParserRuleCall_2_0 = (RuleCall)cMultiplicityAssignment_2.eContents().get(0);
+                
+                //TypeScope:
+                //    targetType=[ClassDeclaration]
+                //    (increment?="+=" | "=")
+                //    multiplicity=DefiniteMultiplicity;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //targetType=[ClassDeclaration]
+                //(increment?="+=" | "=")
+                //multiplicity=DefiniteMultiplicity
+                public Group getGroup() { return cGroup; }
+                
+                //targetType=[ClassDeclaration]
+                public Assignment getTargetTypeAssignment_0() { return cTargetTypeAssignment_0; }
+                
+                //[ClassDeclaration]
+                public CrossReference getTargetTypeClassDeclarationCrossReference_0_0() { return cTargetTypeClassDeclarationCrossReference_0_0; }
+                
+                //ID
+                public RuleCall getTargetTypeClassDeclarationIDTerminalRuleCall_0_0_1() { return cTargetTypeClassDeclarationIDTerminalRuleCall_0_0_1; }
+                
+                //(increment?="+=" | "=")
+                public Alternatives getAlternatives_1() { return cAlternatives_1; }
+                
+                //increment?="+="
+                public Assignment getIncrementAssignment_1_0() { return cIncrementAssignment_1_0; }
+                
+                //"+="
+                public Keyword getIncrementPlusSignEqualsSignKeyword_1_0_0() { return cIncrementPlusSignEqualsSignKeyword_1_0_0; }
+                
+                //"="
+                public Keyword getEqualsSignKeyword_1_1() { return cEqualsSignKeyword_1_1; }
+                
+                //multiplicity=DefiniteMultiplicity
+                public Assignment getMultiplicityAssignment_2() { return cMultiplicityAssignment_2; }
+                
+                //DefiniteMultiplicity
+                public RuleCall getMultiplicityDefiniteMultiplicityParserRuleCall_2_0() { return cMultiplicityDefiniteMultiplicityParserRuleCall_2_0; }
+        }
+        public class MultiplicityElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Multiplicity");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cUnboundedMultiplicityParserRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final RuleCall cDefiniteMultiplicityParserRuleCall_1 = (RuleCall)cAlternatives.eContents().get(1);
+                
+                //Multiplicity:
+                //    UnboundedMultiplicity | DefiniteMultiplicity;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //UnboundedMultiplicity | DefiniteMultiplicity
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //UnboundedMultiplicity
+                public RuleCall getUnboundedMultiplicityParserRuleCall_0() { return cUnboundedMultiplicityParserRuleCall_0; }
+                
+                //DefiniteMultiplicity
+                public RuleCall getDefiniteMultiplicityParserRuleCall_1() { return cDefiniteMultiplicityParserRuleCall_1; }
+        }
+        public class DefiniteMultiplicityElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.DefiniteMultiplicity");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cRangeMultiplicityParserRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final RuleCall cExactMultiplicityParserRuleCall_1 = (RuleCall)cAlternatives.eContents().get(1);
+                
+                //DefiniteMultiplicity returns Multiplicity:
+                //    RangeMultiplicity | ExactMultiplicity;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //RangeMultiplicity | ExactMultiplicity
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //RangeMultiplicity
+                public RuleCall getRangeMultiplicityParserRuleCall_0() { return cRangeMultiplicityParserRuleCall_0; }
+                
+                //ExactMultiplicity
+                public RuleCall getExactMultiplicityParserRuleCall_1() { return cExactMultiplicityParserRuleCall_1; }
+        }
+        public class UnboundedMultiplicityElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.UnboundedMultiplicity");
+                private final Action cUnboundedMultiplicityAction = (Action)rule.eContents().get(1);
+                
+                //UnboundedMultiplicity:
+                //    {UnboundedMultiplicity};
+                @Override public ParserRule getRule() { return rule; }
+                
+                //{UnboundedMultiplicity}
+                public Action getUnboundedMultiplicityAction() { return cUnboundedMultiplicityAction; }
+        }
+        public class RangeMultiplicityElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.RangeMultiplicity");
+                private final Group cGroup = (Group)rule.eContents().get(1);
+                private final Assignment cLowerBoundAssignment_0 = (Assignment)cGroup.eContents().get(0);
+                private final RuleCall cLowerBoundINTTerminalRuleCall_0_0 = (RuleCall)cLowerBoundAssignment_0.eContents().get(0);
+                private final Keyword cFullStopFullStopKeyword_1 = (Keyword)cGroup.eContents().get(1);
+                private final Assignment cUpperBoundAssignment_2 = (Assignment)cGroup.eContents().get(2);
+                private final RuleCall cUpperBoundUpperBoundParserRuleCall_2_0 = (RuleCall)cUpperBoundAssignment_2.eContents().get(0);
+                
+                //RangeMultiplicity:
+                //    lowerBound=INT ".." upperBound=UpperBound;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //lowerBound=INT ".." upperBound=UpperBound
+                public Group getGroup() { return cGroup; }
+                
+                //lowerBound=INT
+                public Assignment getLowerBoundAssignment_0() { return cLowerBoundAssignment_0; }
+                
+                //INT
+                public RuleCall getLowerBoundINTTerminalRuleCall_0_0() { return cLowerBoundINTTerminalRuleCall_0_0; }
+                
+                //".."
+                public Keyword getFullStopFullStopKeyword_1() { return cFullStopFullStopKeyword_1; }
+                
+                //upperBound=UpperBound
+                public Assignment getUpperBoundAssignment_2() { return cUpperBoundAssignment_2; }
+                
+                //UpperBound
+                public RuleCall getUpperBoundUpperBoundParserRuleCall_2_0() { return cUpperBoundUpperBoundParserRuleCall_2_0; }
+        }
+        public class ExactMultiplicityElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.ExactMultiplicity");
+                private final Assignment cExactValueAssignment = (Assignment)rule.eContents().get(1);
+                private final RuleCall cExactValueINTTerminalRuleCall_0 = (RuleCall)cExactValueAssignment.eContents().get(0);
+                
+                //ExactMultiplicity:
+                //    exactValue=INT;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //exactValue=INT
+                public Assignment getExactValueAssignment() { return cExactValueAssignment; }
+                
+                //INT
+                public RuleCall getExactValueINTTerminalRuleCall_0() { return cExactValueINTTerminalRuleCall_0; }
+        }
+        public class UpperBoundElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.UpperBound");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cINTTerminalRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final Keyword cAsteriskKeyword_1 = (Keyword)cAlternatives.eContents().get(1);
+                
+                //UpperBound returns ecore::EInt:
+                //    INT | "*";
+                @Override public ParserRule getRule() { return rule; }
+                
+                //INT | "*"
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //INT
+                public RuleCall getINTTerminalRuleCall_0() { return cINTTerminalRuleCall_0; }
+                
+                //"*"
+                public Keyword getAsteriskKeyword_1() { return cAsteriskKeyword_1; }
+        }
+        public class QuotedOrUnquotedIdElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.QuotedOrUnquotedId");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cQUOTED_IDTerminalRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final RuleCall cIdentifierParserRuleCall_1 = (RuleCall)cAlternatives.eContents().get(1);
+                
+                //QuotedOrUnquotedId:
+                //    QUOTED_ID | Identifier;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //QUOTED_ID | Identifier
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //QUOTED_ID
+                public RuleCall getQUOTED_IDTerminalRuleCall_0() { return cQUOTED_IDTerminalRuleCall_0; }
+                
+                //Identifier
+                public RuleCall getIdentifierParserRuleCall_1() { return cIdentifierParserRuleCall_1; }
+        }
+        public class QualifiedNameElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.QualifiedName");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cQUOTED_IDTerminalRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final Group cGroup_1 = (Group)cAlternatives.eContents().get(1);
+                private final RuleCall cIdentifierParserRuleCall_1_0 = (RuleCall)cGroup_1.eContents().get(0);
+                private final Group cGroup_1_1 = (Group)cGroup_1.eContents().get(1);
+                private final Keyword cColonKeyword_1_1_0 = (Keyword)cGroup_1_1.eContents().get(0);
+                private final RuleCall cIdentifierParserRuleCall_1_1_1 = (RuleCall)cGroup_1_1.eContents().get(1);
+                private final Group cGroup_1_2 = (Group)cGroup_1.eContents().get(2);
+                private final Keyword cColonKeyword_1_2_0 = (Keyword)cGroup_1_2.eContents().get(0);
+                private final RuleCall cQUOTED_IDTerminalRuleCall_1_2_1 = (RuleCall)cGroup_1_2.eContents().get(1);
+                
+                //QualifiedName:
+                //    QUOTED_ID | Identifier (":" Identifier)* (":" QUOTED_ID)?;
+                @Override public ParserRule getRule() { return rule; }
+                
+                //QUOTED_ID | Identifier (":" Identifier)* (":" QUOTED_ID)?
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //QUOTED_ID
+                public RuleCall getQUOTED_IDTerminalRuleCall_0() { return cQUOTED_IDTerminalRuleCall_0; }
+                
+                //Identifier (":" Identifier)* (":" QUOTED_ID)?
+                public Group getGroup_1() { return cGroup_1; }
+                
+                //Identifier
+                public RuleCall getIdentifierParserRuleCall_1_0() { return cIdentifierParserRuleCall_1_0; }
+                
+                //(":" Identifier)*
+                public Group getGroup_1_1() { return cGroup_1_1; }
+                
+                //":"
+                public Keyword getColonKeyword_1_1_0() { return cColonKeyword_1_1_0; }
+                
+                //Identifier
+                public RuleCall getIdentifierParserRuleCall_1_1_1() { return cIdentifierParserRuleCall_1_1_1; }
+                
+                //(":" QUOTED_ID)?
+                public Group getGroup_1_2() { return cGroup_1_2; }
+                
+                //":"
+                public Keyword getColonKeyword_1_2_0() { return cColonKeyword_1_2_0; }
+                
+                //QUOTED_ID
+                public RuleCall getQUOTED_IDTerminalRuleCall_1_2_1() { return cQUOTED_IDTerminalRuleCall_1_2_1; }
+        }
+        public class IdentifierElements extends AbstractParserRuleElementFinder {
+                private final ParserRule rule = (ParserRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.Identifier");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final RuleCall cIDTerminalRuleCall_0 = (RuleCall)cAlternatives.eContents().get(0);
+                private final Keyword cTrueKeyword_1 = (Keyword)cAlternatives.eContents().get(1);
+                private final Keyword cFalseKeyword_2 = (Keyword)cAlternatives.eContents().get(2);
+                
+                //Identifier:
+                //    ID | "true" | "false";
+                @Override public ParserRule getRule() { return rule; }
+                
+                //ID | "true" | "false"
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //ID
+                public RuleCall getIDTerminalRuleCall_0() { return cIDTerminalRuleCall_0; }
+                
+                //"true"
+                public Keyword getTrueKeyword_1() { return cTrueKeyword_1; }
+                
+                //"false"
+                public Keyword getFalseKeyword_2() { return cFalseKeyword_2; }
+        }
+        
+        public class LogicValueElements extends AbstractElementFinder.AbstractEnumRuleElementFinder {
+                private final EnumRule rule = (EnumRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.LogicValue");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final EnumLiteralDeclaration cTRUEEnumLiteralDeclaration_0 = (EnumLiteralDeclaration)cAlternatives.eContents().get(0);
+                private final Keyword cTRUETrueKeyword_0_0 = (Keyword)cTRUEEnumLiteralDeclaration_0.eContents().get(0);
+                private final EnumLiteralDeclaration cFALSEEnumLiteralDeclaration_1 = (EnumLiteralDeclaration)cAlternatives.eContents().get(1);
+                private final Keyword cFALSEFalseKeyword_1_0 = (Keyword)cFALSEEnumLiteralDeclaration_1.eContents().get(0);
+                private final EnumLiteralDeclaration cUNKNOWNEnumLiteralDeclaration_2 = (EnumLiteralDeclaration)cAlternatives.eContents().get(2);
+                private final Keyword cUNKNOWNUnknownKeyword_2_0 = (Keyword)cUNKNOWNEnumLiteralDeclaration_2.eContents().get(0);
+                
+                //enum LogicValue:
+                //    TRUE="true" | FALSE="false" | UNKNOWN="unknown";
+                public EnumRule getRule() { return rule; }
+                
+                //TRUE="true" | FALSE="false" | UNKNOWN="unknown"
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //TRUE="true"
+                public EnumLiteralDeclaration getTRUEEnumLiteralDeclaration_0() { return cTRUEEnumLiteralDeclaration_0; }
+                
+                //"true"
+                public Keyword getTRUETrueKeyword_0_0() { return cTRUETrueKeyword_0_0; }
+                
+                //FALSE="false"
+                public EnumLiteralDeclaration getFALSEEnumLiteralDeclaration_1() { return cFALSEEnumLiteralDeclaration_1; }
+                
+                //"false"
+                public Keyword getFALSEFalseKeyword_1_0() { return cFALSEFalseKeyword_1_0; }
+                
+                //UNKNOWN="unknown"
+                public EnumLiteralDeclaration getUNKNOWNEnumLiteralDeclaration_2() { return cUNKNOWNEnumLiteralDeclaration_2; }
+                
+                //"unknown"
+                public Keyword getUNKNOWNUnknownKeyword_2_0() { return cUNKNOWNUnknownKeyword_2_0; }
+        }
+        public class ShortLogicValueElements extends AbstractElementFinder.AbstractEnumRuleElementFinder {
+                private final EnumRule rule = (EnumRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.ShortLogicValue");
+                private final Alternatives cAlternatives = (Alternatives)rule.eContents().get(1);
+                private final EnumLiteralDeclaration cFALSEEnumLiteralDeclaration_0 = (EnumLiteralDeclaration)cAlternatives.eContents().get(0);
+                private final Keyword cFALSEExclamationMarkKeyword_0_0 = (Keyword)cFALSEEnumLiteralDeclaration_0.eContents().get(0);
+                private final EnumLiteralDeclaration cUNKNOWNEnumLiteralDeclaration_1 = (EnumLiteralDeclaration)cAlternatives.eContents().get(1);
+                private final Keyword cUNKNOWNQuestionMarkKeyword_1_0 = (Keyword)cUNKNOWNEnumLiteralDeclaration_1.eContents().get(0);
+                
+                //enum ShortLogicValue returns LogicValue:
+                //    FALSE="!" | UNKNOWN="?";
+                public EnumRule getRule() { return rule; }
+                
+                //FALSE="!" | UNKNOWN="?"
+                public Alternatives getAlternatives() { return cAlternatives; }
+                
+                //FALSE="!"
+                public EnumLiteralDeclaration getFALSEEnumLiteralDeclaration_0() { return cFALSEEnumLiteralDeclaration_0; }
+                
+                //"!"
+                public Keyword getFALSEExclamationMarkKeyword_0_0() { return cFALSEExclamationMarkKeyword_0_0; }
+                
+                //UNKNOWN="?"
+                public EnumLiteralDeclaration getUNKNOWNEnumLiteralDeclaration_1() { return cUNKNOWNEnumLiteralDeclaration_1; }
+                
+                //"?"
+                public Keyword getUNKNOWNQuestionMarkKeyword_1_0() { return cUNKNOWNQuestionMarkKeyword_1_0; }
+        }
+        
+        private final ProblemElements pProblem;
+        private final StatementElements pStatement;
+        private final ClassDeclarationElements pClassDeclaration;
+        private final EnumDeclarationElements pEnumDeclaration;
+        private final EnumLiteralElements pEnumLiteral;
+        private final ReferenceDeclarationElements pReferenceDeclaration;
+        private final PredicateDefinitionElements pPredicateDefinition;
+        private final ParameterElements pParameter;
+        private final ConjunctionElements pConjunction;
+        private final LiteralElements pLiteral;
+        private final NegativeLiteralElements pNegativeLiteral;
+        private final AtomElements pAtom;
+        private final ArgumentElements pArgument;
+        private final AssertionElements pAssertion;
+        private final LogicValueElements eLogicValue;
+        private final ShortLogicValueElements eShortLogicValue;
+        private final ScopeDeclarationElements pScopeDeclaration;
+        private final TypeScopeElements pTypeScope;
+        private final MultiplicityElements pMultiplicity;
+        private final DefiniteMultiplicityElements pDefiniteMultiplicity;
+        private final UnboundedMultiplicityElements pUnboundedMultiplicity;
+        private final RangeMultiplicityElements pRangeMultiplicity;
+        private final ExactMultiplicityElements pExactMultiplicity;
+        private final UpperBoundElements pUpperBound;
+        private final QuotedOrUnquotedIdElements pQuotedOrUnquotedId;
+        private final QualifiedNameElements pQualifiedName;
+        private final IdentifierElements pIdentifier;
+        private final TerminalRule tSTRING;
+        private final TerminalRule tQUOTED_ID;
+        
+        private final Grammar grammar;
+        
+        private final TerminalsGrammarAccess gaTerminals;
+
+        @Inject
+        public ProblemGrammarAccess(GrammarProvider grammarProvider,
+                        TerminalsGrammarAccess gaTerminals) {
+                this.grammar = internalFindGrammar(grammarProvider);
+                this.gaTerminals = gaTerminals;
+                this.pProblem = new ProblemElements();
+                this.pStatement = new StatementElements();
+                this.pClassDeclaration = new ClassDeclarationElements();
+                this.pEnumDeclaration = new EnumDeclarationElements();
+                this.pEnumLiteral = new EnumLiteralElements();
+                this.pReferenceDeclaration = new ReferenceDeclarationElements();
+                this.pPredicateDefinition = new PredicateDefinitionElements();
+                this.pParameter = new ParameterElements();
+                this.pConjunction = new ConjunctionElements();
+                this.pLiteral = new LiteralElements();
+                this.pNegativeLiteral = new NegativeLiteralElements();
+                this.pAtom = new AtomElements();
+                this.pArgument = new ArgumentElements();
+                this.pAssertion = new AssertionElements();
+                this.eLogicValue = new LogicValueElements();
+                this.eShortLogicValue = new ShortLogicValueElements();
+                this.pScopeDeclaration = new ScopeDeclarationElements();
+                this.pTypeScope = new TypeScopeElements();
+                this.pMultiplicity = new MultiplicityElements();
+                this.pDefiniteMultiplicity = new DefiniteMultiplicityElements();
+                this.pUnboundedMultiplicity = new UnboundedMultiplicityElements();
+                this.pRangeMultiplicity = new RangeMultiplicityElements();
+                this.pExactMultiplicity = new ExactMultiplicityElements();
+                this.pUpperBound = new UpperBoundElements();
+                this.pQuotedOrUnquotedId = new QuotedOrUnquotedIdElements();
+                this.pQualifiedName = new QualifiedNameElements();
+                this.pIdentifier = new IdentifierElements();
+                this.tSTRING = (TerminalRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.STRING");
+                this.tQUOTED_ID = (TerminalRule) GrammarUtil.findRuleForName(getGrammar(), "org.eclipse.viatra.solver.language.Problem.QUOTED_ID");
+        }
+        
+        protected Grammar internalFindGrammar(GrammarProvider grammarProvider) {
+                Grammar grammar = grammarProvider.getGrammar(this);
+                while (grammar != null) {
+                        if ("org.eclipse.viatra.solver.language.Problem".equals(grammar.getName())) {
+                                return grammar;
+                        }
+                        List<Grammar> grammars = grammar.getUsedGrammars();
+                        if (!grammars.isEmpty()) {
+                                grammar = grammars.iterator().next();
+                        } else {
+                                return null;
+                        }
+                }
+                return grammar;
+        }
+        
+        @Override
+        public Grammar getGrammar() {
+                return grammar;
+        }
+        
+        
+        public TerminalsGrammarAccess getTerminalsGrammarAccess() {
+                return gaTerminals;
+        }
+
+        
+        //Problem:
+        //    ("problem" name=Identifier ".")?
+        //    statements+=Statement*;
+        public ProblemElements getProblemAccess() {
+                return pProblem;
+        }
+        
+        public ParserRule getProblemRule() {
+                return getProblemAccess().getRule();
+        }
+        
+        //Statement:
+        //    ClassDeclaration | EnumDeclaration | PredicateDefinition | Assertion | ScopeDeclaration;
+        public StatementElements getStatementAccess() {
+                return pStatement;
+        }
+        
+        public ParserRule getStatementRule() {
+                return getStatementAccess().getRule();
+        }
+        
+        //ClassDeclaration:
+        //    abstract?="abstract"? "class"
+        //    name=Identifier
+        //    ("extends" superTypes+=[Relation|QualifiedName] ("," superTypes+=[Relation|QualifiedName])*)?
+        //    ("{" (referenceDeclarations+=ReferenceDeclaration ";"?)* "}" | ".");
+        public ClassDeclarationElements getClassDeclarationAccess() {
+                return pClassDeclaration;
+        }
+        
+        public ParserRule getClassDeclarationRule() {
+                return getClassDeclarationAccess().getRule();
+        }
+        
+        //EnumDeclaration:
+        //    "enum"
+        //    name=Identifier
+        //    ("{" (literals+=EnumLiteral ("," literals+=EnumLiteral)* ("," | ";")?)? "}" | ".");
+        public EnumDeclarationElements getEnumDeclarationAccess() {
+                return pEnumDeclaration;
+        }
+        
+        public ParserRule getEnumDeclarationRule() {
+                return getEnumDeclarationAccess().getRule();
+        }
+        
+        //EnumLiteral returns Node:
+        //    name=QuotedOrUnquotedId;
+        public EnumLiteralElements getEnumLiteralAccess() {
+                return pEnumLiteral;
+        }
+        
+        public ParserRule getEnumLiteralRule() {
+                return getEnumLiteralAccess().getRule();
+        }
+        
+        //ReferenceDeclaration:
+        //    (containment?="contains" | "refers")?
+        //    referenceType=[Relation|QualifiedName]
+        //    ("[" multiplicity=Multiplicity "]")?
+        //    name=Identifier
+        //    ("opposite" opposite=[ReferenceDeclaration|QualifiedName])?;
+        public ReferenceDeclarationElements getReferenceDeclarationAccess() {
+                return pReferenceDeclaration;
+        }
+        
+        public ParserRule getReferenceDeclarationRule() {
+                return getReferenceDeclarationAccess().getRule();
+        }
+        
+        //PredicateDefinition:
+        //    (error?="error" "pred"? | "pred")
+        //    name=Identifier
+        //    "(" (parameters+=Parameter ("," parameters+=Parameter)*)? ")"
+        //    (":-" bodies+=Conjunction (";" bodies+=Conjunction)*)?
+        //    ".";
+        public PredicateDefinitionElements getPredicateDefinitionAccess() {
+                return pPredicateDefinition;
+        }
+        
+        public ParserRule getPredicateDefinitionRule() {
+                return getPredicateDefinitionAccess().getRule();
+        }
+        
+        //Parameter:
+        //    parameterType=[Relation|QualifiedName]? name=Identifier;
+        public ParameterElements getParameterAccess() {
+                return pParameter;
+        }
+        
+        public ParserRule getParameterRule() {
+                return getParameterAccess().getRule();
+        }
+        
+        //Conjunction:
+        //    literals+=Literal ("," literals+=Literal)*;
+        public ConjunctionElements getConjunctionAccess() {
+                return pConjunction;
+        }
+        
+        public ParserRule getConjunctionRule() {
+                return getConjunctionAccess().getRule();
+        }
+        
+        //Literal:
+        //    Atom | NegativeLiteral;
+        public LiteralElements getLiteralAccess() {
+                return pLiteral;
+        }
+        
+        public ParserRule getLiteralRule() {
+                return getLiteralAccess().getRule();
+        }
+        
+        //NegativeLiteral:
+        //    "!" atom=Atom;
+        public NegativeLiteralElements getNegativeLiteralAccess() {
+                return pNegativeLiteral;
+        }
+        
+        public ParserRule getNegativeLiteralRule() {
+                return getNegativeLiteralAccess().getRule();
+        }
+        
+        //Atom:
+        //    relation=[Relation|QualifiedName]
+        //    transitiveClosure?="+"?
+        //    "(" (arguments+=Argument ("," arguments+=Argument)*)? ")";
+        public AtomElements getAtomAccess() {
+                return pAtom;
+        }
+        
+        public ParserRule getAtomRule() {
+                return getAtomAccess().getRule();
+        }
+        
+        //Argument:
+        //    variableOrNode=[VariableOrNode|QualifiedName];
+        public ArgumentElements getArgumentAccess() {
+                return pArgument;
+        }
+        
+        public ParserRule getArgumentRule() {
+                return getArgumentAccess().getRule();
+        }
+        
+        //Assertion:
+        //    (relation=[Relation|QualifiedName]
+        //    "(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")"
+        //    ":" value=LogicValue |
+        //    value=ShortLogicValue?
+        //    relation=[Relation|QualifiedName]
+        //    "(" (arguments+=[Node|QualifiedName] ("," arguments+=[Node|QualifiedName])*)? ")")
+        //    ".";
+        public AssertionElements getAssertionAccess() {
+                return pAssertion;
+        }
+        
+        public ParserRule getAssertionRule() {
+                return getAssertionAccess().getRule();
+        }
+        
+        //enum LogicValue:
+        //    TRUE="true" | FALSE="false" | UNKNOWN="unknown";
+        public LogicValueElements getLogicValueAccess() {
+                return eLogicValue;
+        }
+        
+        public EnumRule getLogicValueRule() {
+                return getLogicValueAccess().getRule();
+        }
+        
+        //enum ShortLogicValue returns LogicValue:
+        //    FALSE="!" | UNKNOWN="?";
+        public ShortLogicValueElements getShortLogicValueAccess() {
+                return eShortLogicValue;
+        }
+        
+        public EnumRule getShortLogicValueRule() {
+                return getShortLogicValueAccess().getRule();
+        }
+        
+        //ScopeDeclaration:
+        //    "scope" typeScopes+=TypeScope ("," typeScopes+=TypeScope)* ".";
+        public ScopeDeclarationElements getScopeDeclarationAccess() {
+                return pScopeDeclaration;
+        }
+        
+        public ParserRule getScopeDeclarationRule() {
+                return getScopeDeclarationAccess().getRule();
+        }
+        
+        //TypeScope:
+        //    targetType=[ClassDeclaration]
+        //    (increment?="+=" | "=")
+        //    multiplicity=DefiniteMultiplicity;
+        public TypeScopeElements getTypeScopeAccess() {
+                return pTypeScope;
+        }
+        
+        public ParserRule getTypeScopeRule() {
+                return getTypeScopeAccess().getRule();
+        }
+        
+        //Multiplicity:
+        //    UnboundedMultiplicity | DefiniteMultiplicity;
+        public MultiplicityElements getMultiplicityAccess() {
+                return pMultiplicity;
+        }
+        
+        public ParserRule getMultiplicityRule() {
+                return getMultiplicityAccess().getRule();
+        }
+        
+        //DefiniteMultiplicity returns Multiplicity:
+        //    RangeMultiplicity | ExactMultiplicity;
+        public DefiniteMultiplicityElements getDefiniteMultiplicityAccess() {
+                return pDefiniteMultiplicity;
+        }
+        
+        public ParserRule getDefiniteMultiplicityRule() {
+                return getDefiniteMultiplicityAccess().getRule();
+        }
+        
+        //UnboundedMultiplicity:
+        //    {UnboundedMultiplicity};
+        public UnboundedMultiplicityElements getUnboundedMultiplicityAccess() {
+                return pUnboundedMultiplicity;
+        }
+        
+        public ParserRule getUnboundedMultiplicityRule() {
+                return getUnboundedMultiplicityAccess().getRule();
+        }
+        
+        //RangeMultiplicity:
+        //    lowerBound=INT ".." upperBound=UpperBound;
+        public RangeMultiplicityElements getRangeMultiplicityAccess() {
+                return pRangeMultiplicity;
+        }
+        
+        public ParserRule getRangeMultiplicityRule() {
+                return getRangeMultiplicityAccess().getRule();
+        }
+        
+        //ExactMultiplicity:
+        //    exactValue=INT;
+        public ExactMultiplicityElements getExactMultiplicityAccess() {
+                return pExactMultiplicity;
+        }
+        
+        public ParserRule getExactMultiplicityRule() {
+                return getExactMultiplicityAccess().getRule();
+        }
+        
+        //UpperBound returns ecore::EInt:
+        //    INT | "*";
+        public UpperBoundElements getUpperBoundAccess() {
+                return pUpperBound;
+        }
+        
+        public ParserRule getUpperBoundRule() {
+                return getUpperBoundAccess().getRule();
+        }
+        
+        //QuotedOrUnquotedId:
+        //    QUOTED_ID | Identifier;
+        public QuotedOrUnquotedIdElements getQuotedOrUnquotedIdAccess() {
+                return pQuotedOrUnquotedId;
+        }
+        
+        public ParserRule getQuotedOrUnquotedIdRule() {
+                return getQuotedOrUnquotedIdAccess().getRule();
+        }
+        
+        //QualifiedName:
+        //    QUOTED_ID | Identifier (":" Identifier)* (":" QUOTED_ID)?;
+        public QualifiedNameElements getQualifiedNameAccess() {
+                return pQualifiedName;
+        }
+        
+        public ParserRule getQualifiedNameRule() {
+                return getQualifiedNameAccess().getRule();
+        }
+        
+        //Identifier:
+        //    ID | "true" | "false";
+        public IdentifierElements getIdentifierAccess() {
+                return pIdentifier;
+        }
+        
+        public ParserRule getIdentifierRule() {
+                return getIdentifierAccess().getRule();
+        }
+        
+        //@Override
+        //terminal STRING:
+        //    '"' ('\\' . /* 'b'|'t'|'n'|'f'|'r'|'u'|'"'|"'"|'\\' */ | !('\\' | '"'))* '"';
+        public TerminalRule getSTRINGRule() {
+                return tSTRING;
+        }
+        
+        //terminal QUOTED_ID:
+        //    "'" ('\\' . /* 'b'|'t'|'n'|'f'|'r'|'u'|'"'|"'"|'\\' */ | !('\\' | "'"))* "'";
+        public TerminalRule getQUOTED_IDRule() {
+                return tQUOTED_ID;
+        }
+        
+        //terminal ID: '^'?('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'_'|'0'..'9')*;
+        public TerminalRule getIDRule() {
+                return gaTerminals.getIDRule();
+        }
+        
+        //terminal INT returns ecore::EInt: ('0'..'9')+;
+        public TerminalRule getINTRule() {
+                return gaTerminals.getINTRule();
+        }
+        
+        //terminal ML_COMMENT : '/*' -> '*/';
+        public TerminalRule getML_COMMENTRule() {
+                return gaTerminals.getML_COMMENTRule();
+        }
+        
+        //terminal SL_COMMENT : '//' !('\n'|'\r')* ('\r'? '\n')?;
+        public TerminalRule getSL_COMMENTRule() {
+                return gaTerminals.getSL_COMMENTRule();
+        }
+        
+        //terminal WS         : (' '|'\t'|'\r'|'\n')+;
+        public TerminalRule getWSRule() {
+                return gaTerminals.getWSRule();
+        }
+        
+        //terminal ANY_OTHER: .;
+        public TerminalRule getANY_OTHERRule() {
+                return gaTerminals.getANY_OTHERRule();
+        }
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java
new file mode 100644
index 00000000..9cd73e1e
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/AbstractProblemValidator.java
@@ -0,0 +1,19 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.validation;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.eclipse.emf.ecore.EPackage;
+import org.eclipse.xtext.validation.AbstractDeclarativeValidator;
+
+public abstract class AbstractProblemValidator extends AbstractDeclarativeValidator {
+        
+        @Override
+        protected List<EPackage> getEPackages() {
+                List<EPackage> result = new ArrayList<EPackage>();
+                result.add(EPackage.Registry.INSTANCE.getEPackage("http://www.eclipse.org/viatra/solver/language/model/Problem"));
+                return result;
+        }
+}
diff --git a/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java
new file mode 100644
index 00000000..f5a0d87d
--- /dev/null
+++ b/language/src/main/xtext-gen/org/eclipse/viatra/solver/language/validation/ProblemConfigurableIssueCodesProvider.java
@@ -0,0 +1,22 @@
+/*
+ * generated by Xtext 2.26.0.M1
+ */
+package org.eclipse.viatra.solver.language.validation;
+
+import org.eclipse.xtext.preferences.PreferenceKey;
+import org.eclipse.xtext.util.IAcceptor;
+import org.eclipse.xtext.validation.ConfigurableIssueCodesProvider;
+import org.eclipse.xtext.validation.SeverityConverter;
+
+@SuppressWarnings("restriction")
+public class ProblemConfigurableIssueCodesProvider extends ConfigurableIssueCodesProvider {
+        protected static final String ISSUE_CODE_PREFIX = "org.eclipse.viatra.solver.language.";
+
+        public static final String DEPRECATED_MODEL_PART = ISSUE_CODE_PREFIX + "deprecatedModelPart";
+
+        @Override
+        protected void initialize(IAcceptor<PreferenceKey> acceptor) {
+                super.initialize(acceptor);
+                acceptor.accept(create(DEPRECATED_MODEL_PART, SeverityConverter.SEVERITY_WARNING));
+        }
+}
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/test/java/org/eclipse/viatra/solver/language/tests/ProblemParsingTest.xtend b/language/src/test/java/org/eclipse/viatra/solver/language/tests/ProblemParsingTest.xtend
index b007cf8b..b007cf8b 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/test/java/org/eclipse/viatra/solver/language/tests/ProblemParsingTest.xtend
+++ b/language/src/test/java/org/eclipse/viatra/solver/language/tests/ProblemParsingTest.xtend
diff --git a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/test/xtext-gen/org/eclipse/viatra/solver/language/tests/ProblemInjectorProvider.java b/language/src/test/xtext-gen/org/eclipse/viatra/solver/language/tests/ProblemInjectorProvider.java
index 7d0ef1bb..7d0ef1bb 100644
--- a/org.eclipse.viatra.solver.language.parent/org.eclipse.viatra.solver.language/src/test/xtext-gen/org/eclipse/viatra/solver/language/tests/ProblemInjectorProvider.java
+++ b/language/src/test/xtext-gen/org/eclipse/viatra/solver/language/tests/ProblemInjectorProvider.java
diff --git a/org.eclipse.viatra.solver.language.parent/.gitignore b/org.eclipse.viatra.solver.language.parent/.gitignore
deleted file mode 100644
index da88288c..00000000
--- a/org.eclipse.viatra.solver.language.parent/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/.gradle/
diff --git a/org.eclipse.viatra.solver.language.parent/settings.gradle b/org.eclipse.viatra.solver.language.parent/settings.gradle
deleted file mode 100644
index 5ddc5fc4..00000000
--- a/org.eclipse.viatra.solver.language.parent/settings.gradle
+++ /dev/null
@@ -1,4 +0,0 @@
-include 'org.eclipse.viatra.solver.language'
-include 'org.eclipse.viatra.solver.language.ide'
-include 'org.eclipse.viatra.solver.language.model'
-include 'org.eclipse.viatra.solver.language.web'
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 00000000..237e5772
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,4 @@
+include 'language'
+include 'language-ide'
+include 'language-model'
+include 'language-web'