MoDeS3 unit propagation WIP

19 files changed, 11137 insertions, 0 deletions

diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/.gitignore b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/.gitignore
new file mode 100644
index 00000000..e3a0ad7e
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/.gitignore
@@ -0,0 +1,26 @@
+/.ConnectedToReflexive.java._trace
+/.Modes3Queries.java._trace
+/.StraightReflexive.java._trace
+/.DivergentReflexive.java._trace
+/.TurnoutOutputsAreSame.java._trace
+/.Adjacent.java._trace
+/.Output.java._trace
+/.OutputReflexive.java._trace
+/.TooManyAdjacentSegmentsOfSegment.java._trace
+/.Turnout.java._trace
+/.ConnectedTo.java._trace
+/.TurnoutNotConnectedToOutput.java._trace
+/.DisjointNetwork.java._trace
+/.Reachable.java._trace
+/.Unreachable.java._trace
+/.TurnoutInSegments.java._trace
+/.ConnectedToNotSymmetric.java._trace
+/.TurnoutConnectedToBothOutputs.java._trace
+/.TooManyAdjacentTurnouts.java._trace
+/.NoAdjacentSegmentOfSegment.java._trace
+/.TurnoutOutput.java._trace
+/.NoInputOfSegment.java._trace
+/.TooManyInputsOfSegment.java._trace
+/.ExtraInputOfTurnout.java._trace
+/.NoExtraInputOfTurnout.java._trace
+/.TooManyExtraInputsOfTurnout.java._trace
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Adjacent.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Adjacent.java
new file mode 100644
index 00000000..e87f9c18
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Adjacent.java
@@ -0,0 +1,719 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.queries.Output;
+import modes3.queries.TurnoutOutput;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern adjacent(S1 : Segment, S2 : Segment) {
+ *              find output(S1, S2);
+ *         } or {
+ *              find turnoutOutput(S2, S1);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Adjacent extends BaseGeneratedEMFQuerySpecification<Adjacent.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.adjacent pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS1;
+    
+    private Segment fS2;
+    
+    private static List<String> parameterNames = makeImmutableList("S1", "S2");
+    
+    private Match(final Segment pS1, final Segment pS2) {
+      this.fS1 = pS1;
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S1": return this.fS1;
+          case "S2": return this.fS2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS1;
+          case 1: return this.fS2;
+          default: return null;
+      }
+    }
+    
+    public Segment getS1() {
+      return this.fS1;
+    }
+    
+    public Segment getS2() {
+      return this.fS2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S1".equals(parameterName) ) {
+          this.fS1 = (Segment) newValue;
+          return true;
+      }
+      if ("S2".equals(parameterName) ) {
+          this.fS2 = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS1(final Segment pS1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS1 = pS1;
+    }
+    
+    public void setS2(final Segment pS2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.adjacent";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Adjacent.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS1, fS2};
+    }
+    
+    @Override
+    public Adjacent.Match toImmutable() {
+      return isMutable() ? newMatch(fS1, fS2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S1\"=" + prettyPrintValue(fS1) + ", ");
+      result.append("\"S2\"=" + prettyPrintValue(fS2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS1, fS2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Adjacent.Match)) {
+          Adjacent.Match other = (Adjacent.Match) obj;
+          return Objects.equals(fS1, other.fS1) && Objects.equals(fS2, other.fS2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Adjacent specification() {
+      return Adjacent.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Adjacent.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Adjacent.Match newMutableMatch(final Segment pS1, final Segment pS2) {
+      return new Mutable(pS1, pS2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Adjacent.Match newMatch(final Segment pS1, final Segment pS2) {
+      return new Immutable(pS1, pS2);
+    }
+    
+    private static final class Mutable extends Adjacent.Match {
+      Mutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Adjacent.Match {
+      Immutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.adjacent pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern adjacent(S1 : Segment, S2 : Segment) {
+   *    find output(S1, S2);
+   * } or {
+   *    find turnoutOutput(S2, S1);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Adjacent
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Adjacent.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Adjacent.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Adjacent.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S1 = 0;
+    
+    private static final int POSITION_S2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Adjacent.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Adjacent.Match> getAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Adjacent.Match> streamAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Adjacent.Match> getOneArbitraryMatch(final Segment pS1, final Segment pS2) {
+      return rawGetOneArbitraryMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS1, final Segment pS2) {
+      return rawHasMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS1, final Segment pS2) {
+      return rawCountMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS1, final Segment pS2, final Consumer<? super Adjacent.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS1, pS2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Adjacent.Match newMatch(final Segment pS1, final Segment pS2) {
+      return Adjacent.Match.newMatch(pS1, pS2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S1, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Adjacent.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Adjacent.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S2, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Adjacent.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Adjacent.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected Adjacent.Match tupleToMatch(final Tuple t) {
+      try {
+          return Adjacent.Match.newMatch((Segment) t.get(POSITION_S1), (Segment) t.get(POSITION_S2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Adjacent.Match arrayToMatch(final Object[] match) {
+      try {
+          return Adjacent.Match.newMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Adjacent.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Adjacent.Match.newMutableMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Adjacent.Matcher> querySpecification() {
+      return Adjacent.instance();
+    }
+  }
+  
+  private Adjacent() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Adjacent instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Adjacent.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Adjacent.Matcher.on(engine);
+  }
+  
+  @Override
+  public Adjacent.Matcher instantiate() {
+    return Adjacent.Matcher.create();
+  }
+  
+  @Override
+  public Adjacent.Match newEmptyMatch() {
+    return Adjacent.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Adjacent.Match newMatch(final Object... parameters) {
+    return Adjacent.Match.newMatch((modes3.Segment) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Adjacent} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Adjacent#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Adjacent INSTANCE = new Adjacent();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Adjacent.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S1 = new PParameter("S1", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S2 = new PParameter("S2", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S1, parameter_S2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.adjacent";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S1","S2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    find output(S1, S2)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_S1, var_S2), Output.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    find turnoutOutput(S2, S1)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_S2, var_S1), TurnoutOutput.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedTo.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedTo.java
new file mode 100644
index 00000000..a0f14958
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedTo.java
@@ -0,0 +1,704 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern connectedTo(S1 : Segment, S2 : Segment) {
+ *              Segment.connectedTo(S1, S2);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ConnectedTo extends BaseGeneratedEMFQuerySpecification<ConnectedTo.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.connectedTo pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS1;
+    
+    private Segment fS2;
+    
+    private static List<String> parameterNames = makeImmutableList("S1", "S2");
+    
+    private Match(final Segment pS1, final Segment pS2) {
+      this.fS1 = pS1;
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S1": return this.fS1;
+          case "S2": return this.fS2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS1;
+          case 1: return this.fS2;
+          default: return null;
+      }
+    }
+    
+    public Segment getS1() {
+      return this.fS1;
+    }
+    
+    public Segment getS2() {
+      return this.fS2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S1".equals(parameterName) ) {
+          this.fS1 = (Segment) newValue;
+          return true;
+      }
+      if ("S2".equals(parameterName) ) {
+          this.fS2 = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS1(final Segment pS1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS1 = pS1;
+    }
+    
+    public void setS2(final Segment pS2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.connectedTo";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ConnectedTo.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS1, fS2};
+    }
+    
+    @Override
+    public ConnectedTo.Match toImmutable() {
+      return isMutable() ? newMatch(fS1, fS2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S1\"=" + prettyPrintValue(fS1) + ", ");
+      result.append("\"S2\"=" + prettyPrintValue(fS2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS1, fS2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ConnectedTo.Match)) {
+          ConnectedTo.Match other = (ConnectedTo.Match) obj;
+          return Objects.equals(fS1, other.fS1) && Objects.equals(fS2, other.fS2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ConnectedTo specification() {
+      return ConnectedTo.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ConnectedTo.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ConnectedTo.Match newMutableMatch(final Segment pS1, final Segment pS2) {
+      return new Mutable(pS1, pS2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ConnectedTo.Match newMatch(final Segment pS1, final Segment pS2) {
+      return new Immutable(pS1, pS2);
+    }
+    
+    private static final class Mutable extends ConnectedTo.Match {
+      Mutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ConnectedTo.Match {
+      Immutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.connectedTo pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern connectedTo(S1 : Segment, S2 : Segment) {
+   *    Segment.connectedTo(S1, S2);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ConnectedTo
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ConnectedTo.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ConnectedTo.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ConnectedTo.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S1 = 0;
+    
+    private static final int POSITION_S2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ConnectedTo.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ConnectedTo.Match> getAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ConnectedTo.Match> streamAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ConnectedTo.Match> getOneArbitraryMatch(final Segment pS1, final Segment pS2) {
+      return rawGetOneArbitraryMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS1, final Segment pS2) {
+      return rawHasMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS1, final Segment pS2) {
+      return rawCountMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS1, final Segment pS2, final Consumer<? super ConnectedTo.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS1, pS2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ConnectedTo.Match newMatch(final Segment pS1, final Segment pS2) {
+      return ConnectedTo.Match.newMatch(pS1, pS2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S1, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final ConnectedTo.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final ConnectedTo.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S2, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final ConnectedTo.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final ConnectedTo.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ConnectedTo.Match tupleToMatch(final Tuple t) {
+      try {
+          return ConnectedTo.Match.newMatch((Segment) t.get(POSITION_S1), (Segment) t.get(POSITION_S2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConnectedTo.Match arrayToMatch(final Object[] match) {
+      try {
+          return ConnectedTo.Match.newMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConnectedTo.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ConnectedTo.Match.newMutableMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ConnectedTo.Matcher> querySpecification() {
+      return ConnectedTo.instance();
+    }
+  }
+  
+  private ConnectedTo() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ConnectedTo instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ConnectedTo.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ConnectedTo.Matcher.on(engine);
+  }
+  
+  @Override
+  public ConnectedTo.Matcher instantiate() {
+    return ConnectedTo.Matcher.create();
+  }
+  
+  @Override
+  public ConnectedTo.Match newEmptyMatch() {
+    return ConnectedTo.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ConnectedTo.Match newMatch(final Object... parameters) {
+    return ConnectedTo.Match.newMatch((modes3.Segment) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ConnectedTo} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ConnectedTo#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ConnectedTo INSTANCE = new ConnectedTo();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ConnectedTo.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S1 = new PParameter("S1", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S2 = new PParameter("S2", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S1, parameter_S2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.connectedTo";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S1","S2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    Segment.connectedTo(S1, S2)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment", "connectedTo")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S2);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedToNotSymmetric.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedToNotSymmetric.java
new file mode 100644
index 00000000..91b74c7e
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedToNotSymmetric.java
@@ -0,0 +1,724 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.queries.ConnectedTo;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "connectedToNotSymmetric", severity = "error", key = { S1, S2 })
+ *         pattern connectedToNotSymmetric(S1 : Segment, S2 : Segment) {
+ *              Segment.connectedTo(S1, S2);
+ *              neg find connectedTo(S2, S1);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ConnectedToNotSymmetric extends BaseGeneratedEMFQuerySpecification<ConnectedToNotSymmetric.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.connectedToNotSymmetric pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS1;
+    
+    private Segment fS2;
+    
+    private static List<String> parameterNames = makeImmutableList("S1", "S2");
+    
+    private Match(final Segment pS1, final Segment pS2) {
+      this.fS1 = pS1;
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S1": return this.fS1;
+          case "S2": return this.fS2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS1;
+          case 1: return this.fS2;
+          default: return null;
+      }
+    }
+    
+    public Segment getS1() {
+      return this.fS1;
+    }
+    
+    public Segment getS2() {
+      return this.fS2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S1".equals(parameterName) ) {
+          this.fS1 = (Segment) newValue;
+          return true;
+      }
+      if ("S2".equals(parameterName) ) {
+          this.fS2 = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS1(final Segment pS1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS1 = pS1;
+    }
+    
+    public void setS2(final Segment pS2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.connectedToNotSymmetric";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ConnectedToNotSymmetric.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS1, fS2};
+    }
+    
+    @Override
+    public ConnectedToNotSymmetric.Match toImmutable() {
+      return isMutable() ? newMatch(fS1, fS2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S1\"=" + prettyPrintValue(fS1) + ", ");
+      result.append("\"S2\"=" + prettyPrintValue(fS2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS1, fS2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ConnectedToNotSymmetric.Match)) {
+          ConnectedToNotSymmetric.Match other = (ConnectedToNotSymmetric.Match) obj;
+          return Objects.equals(fS1, other.fS1) && Objects.equals(fS2, other.fS2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ConnectedToNotSymmetric specification() {
+      return ConnectedToNotSymmetric.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ConnectedToNotSymmetric.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ConnectedToNotSymmetric.Match newMutableMatch(final Segment pS1, final Segment pS2) {
+      return new Mutable(pS1, pS2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ConnectedToNotSymmetric.Match newMatch(final Segment pS1, final Segment pS2) {
+      return new Immutable(pS1, pS2);
+    }
+    
+    private static final class Mutable extends ConnectedToNotSymmetric.Match {
+      Mutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ConnectedToNotSymmetric.Match {
+      Immutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.connectedToNotSymmetric pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "connectedToNotSymmetric", severity = "error", key = { S1, S2 })
+   * pattern connectedToNotSymmetric(S1 : Segment, S2 : Segment) {
+   *    Segment.connectedTo(S1, S2);
+   *    neg find connectedTo(S2, S1);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ConnectedToNotSymmetric
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ConnectedToNotSymmetric.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ConnectedToNotSymmetric.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ConnectedToNotSymmetric.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S1 = 0;
+    
+    private static final int POSITION_S2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ConnectedToNotSymmetric.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ConnectedToNotSymmetric.Match> getAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ConnectedToNotSymmetric.Match> streamAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ConnectedToNotSymmetric.Match> getOneArbitraryMatch(final Segment pS1, final Segment pS2) {
+      return rawGetOneArbitraryMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS1, final Segment pS2) {
+      return rawHasMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS1, final Segment pS2) {
+      return rawCountMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS1, final Segment pS2, final Consumer<? super ConnectedToNotSymmetric.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS1, pS2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ConnectedToNotSymmetric.Match newMatch(final Segment pS1, final Segment pS2) {
+      return ConnectedToNotSymmetric.Match.newMatch(pS1, pS2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S1, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final ConnectedToNotSymmetric.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final ConnectedToNotSymmetric.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S2, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final ConnectedToNotSymmetric.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final ConnectedToNotSymmetric.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ConnectedToNotSymmetric.Match tupleToMatch(final Tuple t) {
+      try {
+          return ConnectedToNotSymmetric.Match.newMatch((Segment) t.get(POSITION_S1), (Segment) t.get(POSITION_S2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConnectedToNotSymmetric.Match arrayToMatch(final Object[] match) {
+      try {
+          return ConnectedToNotSymmetric.Match.newMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConnectedToNotSymmetric.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ConnectedToNotSymmetric.Match.newMutableMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ConnectedToNotSymmetric.Matcher> querySpecification() {
+      return ConnectedToNotSymmetric.instance();
+    }
+  }
+  
+  private ConnectedToNotSymmetric() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ConnectedToNotSymmetric instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ConnectedToNotSymmetric.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ConnectedToNotSymmetric.Matcher.on(engine);
+  }
+  
+  @Override
+  public ConnectedToNotSymmetric.Matcher instantiate() {
+    return ConnectedToNotSymmetric.Matcher.create();
+  }
+  
+  @Override
+  public ConnectedToNotSymmetric.Match newEmptyMatch() {
+    return ConnectedToNotSymmetric.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ConnectedToNotSymmetric.Match newMatch(final Object... parameters) {
+    return ConnectedToNotSymmetric.Match.newMatch((modes3.Segment) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ConnectedToNotSymmetric} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ConnectedToNotSymmetric#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ConnectedToNotSymmetric INSTANCE = new ConnectedToNotSymmetric();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ConnectedToNotSymmetric.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S1 = new PParameter("S1", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S2 = new PParameter("S2", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S1, parameter_S2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.connectedToNotSymmetric";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S1","S2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    Segment.connectedTo(S1, S2)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment", "connectedTo")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S2);
+          //    neg find connectedTo(S2, S1)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_S2, var_S1), ConnectedTo.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "connectedToNotSymmetric");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("S1"), 
+                              new ParameterReference("S2")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedToReflexive.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedToReflexive.java
new file mode 100644
index 00000000..948fec73
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ConnectedToReflexive.java
@@ -0,0 +1,563 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "connectedToReflexive", severity = "error", key = { S })
+ *         pattern connectedToReflexive(S : Segment) {
+ *              Segment.connectedTo(S, S);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ConnectedToReflexive extends BaseGeneratedEMFQuerySpecification<ConnectedToReflexive.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.connectedToReflexive pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS;
+    
+    private static List<String> parameterNames = makeImmutableList("S");
+    
+    private Match(final Segment pS) {
+      this.fS = pS;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S": return this.fS;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS;
+          default: return null;
+      }
+    }
+    
+    public Segment getS() {
+      return this.fS;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S".equals(parameterName) ) {
+          this.fS = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS(final Segment pS) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS = pS;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.connectedToReflexive";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ConnectedToReflexive.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS};
+    }
+    
+    @Override
+    public ConnectedToReflexive.Match toImmutable() {
+      return isMutable() ? newMatch(fS) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S\"=" + prettyPrintValue(fS));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ConnectedToReflexive.Match)) {
+          ConnectedToReflexive.Match other = (ConnectedToReflexive.Match) obj;
+          return Objects.equals(fS, other.fS);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ConnectedToReflexive specification() {
+      return ConnectedToReflexive.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ConnectedToReflexive.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ConnectedToReflexive.Match newMutableMatch(final Segment pS) {
+      return new Mutable(pS);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ConnectedToReflexive.Match newMatch(final Segment pS) {
+      return new Immutable(pS);
+    }
+    
+    private static final class Mutable extends ConnectedToReflexive.Match {
+      Mutable(final Segment pS) {
+        super(pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ConnectedToReflexive.Match {
+      Immutable(final Segment pS) {
+        super(pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.connectedToReflexive pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "connectedToReflexive", severity = "error", key = { S })
+   * pattern connectedToReflexive(S : Segment) {
+   *    Segment.connectedTo(S, S);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ConnectedToReflexive
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ConnectedToReflexive.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ConnectedToReflexive.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ConnectedToReflexive.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ConnectedToReflexive.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ConnectedToReflexive.Match> getAllMatches(final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pS}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ConnectedToReflexive.Match> streamAllMatches(final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pS});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ConnectedToReflexive.Match> getOneArbitraryMatch(final Segment pS) {
+      return rawGetOneArbitraryMatch(new Object[]{pS});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS) {
+      return rawHasMatch(new Object[]{pS});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS) {
+      return rawCountMatches(new Object[]{pS});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS, final Consumer<? super ConnectedToReflexive.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ConnectedToReflexive.Match newMatch(final Segment pS) {
+      return ConnectedToReflexive.Match.newMatch(pS);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray());
+    }
+    
+    @Override
+    protected ConnectedToReflexive.Match tupleToMatch(final Tuple t) {
+      try {
+          return ConnectedToReflexive.Match.newMatch((Segment) t.get(POSITION_S));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConnectedToReflexive.Match arrayToMatch(final Object[] match) {
+      try {
+          return ConnectedToReflexive.Match.newMatch((Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConnectedToReflexive.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ConnectedToReflexive.Match.newMutableMatch((Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ConnectedToReflexive.Matcher> querySpecification() {
+      return ConnectedToReflexive.instance();
+    }
+  }
+  
+  private ConnectedToReflexive() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ConnectedToReflexive instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ConnectedToReflexive.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ConnectedToReflexive.Matcher.on(engine);
+  }
+  
+  @Override
+  public ConnectedToReflexive.Matcher instantiate() {
+    return ConnectedToReflexive.Matcher.create();
+  }
+  
+  @Override
+  public ConnectedToReflexive.Match newEmptyMatch() {
+    return ConnectedToReflexive.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ConnectedToReflexive.Match newMatch(final Object... parameters) {
+    return ConnectedToReflexive.Match.newMatch((modes3.Segment) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ConnectedToReflexive} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ConnectedToReflexive#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ConnectedToReflexive INSTANCE = new ConnectedToReflexive();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ConnectedToReflexive.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S = new PParameter("S", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.connectedToReflexive";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S = body.getOrCreateVariableByName("S");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S, parameter_S)
+          ));
+          //    Segment.connectedTo(S, S)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment", "connectedTo")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "connectedToReflexive");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("S")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ExtraInputOfTurnout.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ExtraInputOfTurnout.java
new file mode 100644
index 00000000..62e2a54d
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/ExtraInputOfTurnout.java
@@ -0,0 +1,730 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.Turnout;
+import modes3.queries.Output;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern extraInputOfTurnout(T : Turnout, S : Segment) {
+ *              Turnout.straight(T, Straight);
+ *              Turnout.divergent(T, Divergent);
+ *              find output(S, T);
+ *              S != Straight;
+ *              S != Divergent;
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ExtraInputOfTurnout extends BaseGeneratedEMFQuerySpecification<ExtraInputOfTurnout.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.extraInputOfTurnout pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private Segment fS;
+    
+    private static List<String> parameterNames = makeImmutableList("T", "S");
+    
+    private Match(final Turnout pT, final Segment pS) {
+      this.fT = pT;
+      this.fS = pS;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          case "S": return this.fS;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          case 1: return this.fS;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    public Segment getS() {
+      return this.fS;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      if ("S".equals(parameterName) ) {
+          this.fS = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    public void setS(final Segment pS) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS = pS;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.extraInputOfTurnout";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ExtraInputOfTurnout.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT, fS};
+    }
+    
+    @Override
+    public ExtraInputOfTurnout.Match toImmutable() {
+      return isMutable() ? newMatch(fT, fS) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT) + ", ");
+      result.append("\"S\"=" + prettyPrintValue(fS));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT, fS);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ExtraInputOfTurnout.Match)) {
+          ExtraInputOfTurnout.Match other = (ExtraInputOfTurnout.Match) obj;
+          return Objects.equals(fT, other.fT) && Objects.equals(fS, other.fS);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ExtraInputOfTurnout specification() {
+      return ExtraInputOfTurnout.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ExtraInputOfTurnout.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ExtraInputOfTurnout.Match newMutableMatch(final Turnout pT, final Segment pS) {
+      return new Mutable(pT, pS);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ExtraInputOfTurnout.Match newMatch(final Turnout pT, final Segment pS) {
+      return new Immutable(pT, pS);
+    }
+    
+    private static final class Mutable extends ExtraInputOfTurnout.Match {
+      Mutable(final Turnout pT, final Segment pS) {
+        super(pT, pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ExtraInputOfTurnout.Match {
+      Immutable(final Turnout pT, final Segment pS) {
+        super(pT, pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.extraInputOfTurnout pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern extraInputOfTurnout(T : Turnout, S : Segment) {
+   *    Turnout.straight(T, Straight);
+   *    Turnout.divergent(T, Divergent);
+   *    find output(S, T);
+   *    S != Straight;
+   *    S != Divergent;
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ExtraInputOfTurnout
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ExtraInputOfTurnout.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ExtraInputOfTurnout.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ExtraInputOfTurnout.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final int POSITION_S = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ExtraInputOfTurnout.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ExtraInputOfTurnout.Match> getAllMatches(final Turnout pT, final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pT, pS}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ExtraInputOfTurnout.Match> streamAllMatches(final Turnout pT, final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ExtraInputOfTurnout.Match> getOneArbitraryMatch(final Turnout pT, final Segment pS) {
+      return rawGetOneArbitraryMatch(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT, final Segment pS) {
+      return rawHasMatch(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT, final Segment pS) {
+      return rawCountMatches(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Segment pS, final Consumer<? super ExtraInputOfTurnout.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT, pS}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ExtraInputOfTurnout.Match newMatch(final Turnout pT, final Segment pS) {
+      return ExtraInputOfTurnout.Match.newMatch(pT, pS);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT(final ExtraInputOfTurnout.Match partialMatch) {
+      return rawStreamAllValuesOfT(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT(final Segment pS) {
+      return rawStreamAllValuesOfT(new Object[]{null, pS});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT(final ExtraInputOfTurnout.Match partialMatch) {
+      return rawStreamAllValuesOfT(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT(final Segment pS) {
+      return rawStreamAllValuesOfT(new Object[]{null, pS}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS(final ExtraInputOfTurnout.Match partialMatch) {
+      return rawStreamAllValuesOfS(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS(final Turnout pT) {
+      return rawStreamAllValuesOfS(new Object[]{pT, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS(final ExtraInputOfTurnout.Match partialMatch) {
+      return rawStreamAllValuesOfS(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS(final Turnout pT) {
+      return rawStreamAllValuesOfS(new Object[]{pT, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ExtraInputOfTurnout.Match tupleToMatch(final Tuple t) {
+      try {
+          return ExtraInputOfTurnout.Match.newMatch((Turnout) t.get(POSITION_T), (Segment) t.get(POSITION_S));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ExtraInputOfTurnout.Match arrayToMatch(final Object[] match) {
+      try {
+          return ExtraInputOfTurnout.Match.newMatch((Turnout) match[POSITION_T], (Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ExtraInputOfTurnout.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ExtraInputOfTurnout.Match.newMutableMatch((Turnout) match[POSITION_T], (Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ExtraInputOfTurnout.Matcher> querySpecification() {
+      return ExtraInputOfTurnout.instance();
+    }
+  }
+  
+  private ExtraInputOfTurnout() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ExtraInputOfTurnout instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ExtraInputOfTurnout.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ExtraInputOfTurnout.Matcher.on(engine);
+  }
+  
+  @Override
+  public ExtraInputOfTurnout.Matcher instantiate() {
+    return ExtraInputOfTurnout.Matcher.create();
+  }
+  
+  @Override
+  public ExtraInputOfTurnout.Match newEmptyMatch() {
+    return ExtraInputOfTurnout.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ExtraInputOfTurnout.Match newMatch(final Object... parameters) {
+    return ExtraInputOfTurnout.Match.newMatch((modes3.Turnout) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ExtraInputOfTurnout} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ExtraInputOfTurnout#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ExtraInputOfTurnout INSTANCE = new ExtraInputOfTurnout();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ExtraInputOfTurnout.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S = new PParameter("S", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T, parameter_S);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.extraInputOfTurnout";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T","S");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var_S = body.getOrCreateVariableByName("S");
+          PVariable var_Straight = body.getOrCreateVariableByName("Straight");
+          PVariable var_Divergent = body.getOrCreateVariableByName("Divergent");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T),
+             new ExportedParameter(body, var_S, parameter_S)
+          ));
+          //    Turnout.straight(T, Straight)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "straight")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_Straight);
+          //    Turnout.divergent(T, Divergent)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "divergent")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_1_, var_Divergent);
+          //    find output(S, T)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_S, var_T), Output.instance().getInternalQueryRepresentation());
+          //    S != Straight
+          new Inequality(body, var_S, var_Straight);
+          //    S != Divergent
+          new Inequality(body, var_S, var_Divergent);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Modes3Queries.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Modes3Queries.java
new file mode 100644
index 00000000..01ec77a1
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Modes3Queries.java
@@ -0,0 +1,229 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import modes3.queries.Adjacent;
+import modes3.queries.ConnectedTo;
+import modes3.queries.ConnectedToNotSymmetric;
+import modes3.queries.ConnectedToReflexive;
+import modes3.queries.ExtraInputOfTurnout;
+import modes3.queries.NoExtraInputOfTurnout;
+import modes3.queries.Output;
+import modes3.queries.OutputReflexive;
+import modes3.queries.Reachable;
+import modes3.queries.TooManyExtraInputsOfTurnout;
+import modes3.queries.TooManyInputsOfSegment;
+import modes3.queries.Turnout;
+import modes3.queries.TurnoutConnectedToBothOutputs;
+import modes3.queries.TurnoutInSegments;
+import modes3.queries.TurnoutOutput;
+import modes3.queries.TurnoutOutputsAreSame;
+import modes3.queries.Unreachable;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedPatternGroup;
+
+/**
+ * A pattern group formed of all public patterns defined in Modes3Queries.vql.
+ * 
+ * <p>Use the static instance as any {@link interface org.eclipse.viatra.query.runtime.api.IQueryGroup}, to conveniently prepare
+ * a VIATRA Query engine for matching all patterns originally defined in file Modes3Queries.vql,
+ * in order to achieve better performance than one-by-one on-demand matcher initialization.
+ * 
+ * <p> From package modes3.queries, the group contains the definition of the following patterns: <ul>
+ * <li>turnoutInSegments</li>
+ * <li>connectedTo</li>
+ * <li>connectedToNotSymmetric</li>
+ * <li>connectedToReflexive</li>
+ * <li>turnoutOutput</li>
+ * <li>outputReflexive</li>
+ * <li>turnoutOutputsAreSame</li>
+ * <li>turnout</li>
+ * <li>output</li>
+ * <li>tooManyInputsOfSegment</li>
+ * <li>turnoutConnectedToBothOutputs</li>
+ * <li>extraInputOfTurnout</li>
+ * <li>noExtraInputOfTurnout</li>
+ * <li>tooManyExtraInputsOfTurnout</li>
+ * <li>adjacent</li>
+ * <li>reachable</li>
+ * <li>unreachable</li>
+ * </ul>
+ * 
+ * @see IQueryGroup
+ * 
+ */
+@SuppressWarnings("all")
+public final class Modes3Queries extends BaseGeneratedPatternGroup {
+  /**
+   * Access the pattern group.
+   * 
+   * @return the singleton instance of the group
+   * @throws ViatraQueryRuntimeException if there was an error loading the generated code of pattern specifications
+   * 
+   */
+  public static Modes3Queries instance() {
+    if (INSTANCE == null) {
+        INSTANCE = new Modes3Queries();
+    }
+    return INSTANCE;
+  }
+  
+  private static Modes3Queries INSTANCE;
+  
+  private Modes3Queries() {
+    querySpecifications.add(TurnoutInSegments.instance());
+    querySpecifications.add(ConnectedTo.instance());
+    querySpecifications.add(ConnectedToNotSymmetric.instance());
+    querySpecifications.add(ConnectedToReflexive.instance());
+    querySpecifications.add(TurnoutOutput.instance());
+    querySpecifications.add(OutputReflexive.instance());
+    querySpecifications.add(TurnoutOutputsAreSame.instance());
+    querySpecifications.add(Turnout.instance());
+    querySpecifications.add(Output.instance());
+    querySpecifications.add(TooManyInputsOfSegment.instance());
+    querySpecifications.add(TurnoutConnectedToBothOutputs.instance());
+    querySpecifications.add(ExtraInputOfTurnout.instance());
+    querySpecifications.add(NoExtraInputOfTurnout.instance());
+    querySpecifications.add(TooManyExtraInputsOfTurnout.instance());
+    querySpecifications.add(Adjacent.instance());
+    querySpecifications.add(Reachable.instance());
+    querySpecifications.add(Unreachable.instance());
+  }
+  
+  public TurnoutInSegments getTurnoutInSegments() {
+    return TurnoutInSegments.instance();
+  }
+  
+  public TurnoutInSegments.Matcher getTurnoutInSegments(final ViatraQueryEngine engine) {
+    return TurnoutInSegments.Matcher.on(engine);
+  }
+  
+  public ConnectedTo getConnectedTo() {
+    return ConnectedTo.instance();
+  }
+  
+  public ConnectedTo.Matcher getConnectedTo(final ViatraQueryEngine engine) {
+    return ConnectedTo.Matcher.on(engine);
+  }
+  
+  public ConnectedToNotSymmetric getConnectedToNotSymmetric() {
+    return ConnectedToNotSymmetric.instance();
+  }
+  
+  public ConnectedToNotSymmetric.Matcher getConnectedToNotSymmetric(final ViatraQueryEngine engine) {
+    return ConnectedToNotSymmetric.Matcher.on(engine);
+  }
+  
+  public ConnectedToReflexive getConnectedToReflexive() {
+    return ConnectedToReflexive.instance();
+  }
+  
+  public ConnectedToReflexive.Matcher getConnectedToReflexive(final ViatraQueryEngine engine) {
+    return ConnectedToReflexive.Matcher.on(engine);
+  }
+  
+  public TurnoutOutput getTurnoutOutput() {
+    return TurnoutOutput.instance();
+  }
+  
+  public TurnoutOutput.Matcher getTurnoutOutput(final ViatraQueryEngine engine) {
+    return TurnoutOutput.Matcher.on(engine);
+  }
+  
+  public OutputReflexive getOutputReflexive() {
+    return OutputReflexive.instance();
+  }
+  
+  public OutputReflexive.Matcher getOutputReflexive(final ViatraQueryEngine engine) {
+    return OutputReflexive.Matcher.on(engine);
+  }
+  
+  public TurnoutOutputsAreSame getTurnoutOutputsAreSame() {
+    return TurnoutOutputsAreSame.instance();
+  }
+  
+  public TurnoutOutputsAreSame.Matcher getTurnoutOutputsAreSame(final ViatraQueryEngine engine) {
+    return TurnoutOutputsAreSame.Matcher.on(engine);
+  }
+  
+  public Turnout getTurnout() {
+    return Turnout.instance();
+  }
+  
+  public Turnout.Matcher getTurnout(final ViatraQueryEngine engine) {
+    return Turnout.Matcher.on(engine);
+  }
+  
+  public Output getOutput() {
+    return Output.instance();
+  }
+  
+  public Output.Matcher getOutput(final ViatraQueryEngine engine) {
+    return Output.Matcher.on(engine);
+  }
+  
+  public TooManyInputsOfSegment getTooManyInputsOfSegment() {
+    return TooManyInputsOfSegment.instance();
+  }
+  
+  public TooManyInputsOfSegment.Matcher getTooManyInputsOfSegment(final ViatraQueryEngine engine) {
+    return TooManyInputsOfSegment.Matcher.on(engine);
+  }
+  
+  public TurnoutConnectedToBothOutputs getTurnoutConnectedToBothOutputs() {
+    return TurnoutConnectedToBothOutputs.instance();
+  }
+  
+  public TurnoutConnectedToBothOutputs.Matcher getTurnoutConnectedToBothOutputs(final ViatraQueryEngine engine) {
+    return TurnoutConnectedToBothOutputs.Matcher.on(engine);
+  }
+  
+  public ExtraInputOfTurnout getExtraInputOfTurnout() {
+    return ExtraInputOfTurnout.instance();
+  }
+  
+  public ExtraInputOfTurnout.Matcher getExtraInputOfTurnout(final ViatraQueryEngine engine) {
+    return ExtraInputOfTurnout.Matcher.on(engine);
+  }
+  
+  public NoExtraInputOfTurnout getNoExtraInputOfTurnout() {
+    return NoExtraInputOfTurnout.instance();
+  }
+  
+  public NoExtraInputOfTurnout.Matcher getNoExtraInputOfTurnout(final ViatraQueryEngine engine) {
+    return NoExtraInputOfTurnout.Matcher.on(engine);
+  }
+  
+  public TooManyExtraInputsOfTurnout getTooManyExtraInputsOfTurnout() {
+    return TooManyExtraInputsOfTurnout.instance();
+  }
+  
+  public TooManyExtraInputsOfTurnout.Matcher getTooManyExtraInputsOfTurnout(final ViatraQueryEngine engine) {
+    return TooManyExtraInputsOfTurnout.Matcher.on(engine);
+  }
+  
+  public Adjacent getAdjacent() {
+    return Adjacent.instance();
+  }
+  
+  public Adjacent.Matcher getAdjacent(final ViatraQueryEngine engine) {
+    return Adjacent.Matcher.on(engine);
+  }
+  
+  public Reachable getReachable() {
+    return Reachable.instance();
+  }
+  
+  public Reachable.Matcher getReachable(final ViatraQueryEngine engine) {
+    return Reachable.Matcher.on(engine);
+  }
+  
+  public Unreachable getUnreachable() {
+    return Unreachable.instance();
+  }
+  
+  public Unreachable.Matcher getUnreachable(final ViatraQueryEngine engine) {
+    return Unreachable.Matcher.on(engine);
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/NoExtraInputOfTurnout.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/NoExtraInputOfTurnout.java
new file mode 100644
index 00000000..621d736f
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/NoExtraInputOfTurnout.java
@@ -0,0 +1,560 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Turnout;
+import modes3.queries.ExtraInputOfTurnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "noExtraInputOfTurnout", severity = "error", key = { T })
+ *         pattern noExtraInputOfTurnout(T : Turnout) {
+ *              neg find extraInputOfTurnout(T, _);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class NoExtraInputOfTurnout extends BaseGeneratedEMFQuerySpecification<NoExtraInputOfTurnout.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.noExtraInputOfTurnout pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.noExtraInputOfTurnout";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return NoExtraInputOfTurnout.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public NoExtraInputOfTurnout.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof NoExtraInputOfTurnout.Match)) {
+          NoExtraInputOfTurnout.Match other = (NoExtraInputOfTurnout.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public NoExtraInputOfTurnout specification() {
+      return NoExtraInputOfTurnout.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static NoExtraInputOfTurnout.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static NoExtraInputOfTurnout.Match newMutableMatch(final Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static NoExtraInputOfTurnout.Match newMatch(final Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends NoExtraInputOfTurnout.Match {
+      Mutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends NoExtraInputOfTurnout.Match {
+      Immutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.noExtraInputOfTurnout pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "noExtraInputOfTurnout", severity = "error", key = { T })
+   * pattern noExtraInputOfTurnout(T : Turnout) {
+   *    neg find extraInputOfTurnout(T, _);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see NoExtraInputOfTurnout
+   * 
+   */
+  public static class Matcher extends BaseMatcher<NoExtraInputOfTurnout.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static NoExtraInputOfTurnout.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static NoExtraInputOfTurnout.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(NoExtraInputOfTurnout.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<NoExtraInputOfTurnout.Match> getAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<NoExtraInputOfTurnout.Match> streamAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<NoExtraInputOfTurnout.Match> getOneArbitraryMatch(final Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Consumer<? super NoExtraInputOfTurnout.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public NoExtraInputOfTurnout.Match newMatch(final Turnout pT) {
+      return NoExtraInputOfTurnout.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected NoExtraInputOfTurnout.Match tupleToMatch(final Tuple t) {
+      try {
+          return NoExtraInputOfTurnout.Match.newMatch((Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected NoExtraInputOfTurnout.Match arrayToMatch(final Object[] match) {
+      try {
+          return NoExtraInputOfTurnout.Match.newMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected NoExtraInputOfTurnout.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return NoExtraInputOfTurnout.Match.newMutableMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<NoExtraInputOfTurnout.Matcher> querySpecification() {
+      return NoExtraInputOfTurnout.instance();
+    }
+  }
+  
+  private NoExtraInputOfTurnout() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static NoExtraInputOfTurnout instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected NoExtraInputOfTurnout.Matcher instantiate(final ViatraQueryEngine engine) {
+    return NoExtraInputOfTurnout.Matcher.on(engine);
+  }
+  
+  @Override
+  public NoExtraInputOfTurnout.Matcher instantiate() {
+    return NoExtraInputOfTurnout.Matcher.create();
+  }
+  
+  @Override
+  public NoExtraInputOfTurnout.Match newEmptyMatch() {
+    return NoExtraInputOfTurnout.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public NoExtraInputOfTurnout.Match newMatch(final Object... parameters) {
+    return NoExtraInputOfTurnout.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link NoExtraInputOfTurnout} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link NoExtraInputOfTurnout#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final NoExtraInputOfTurnout INSTANCE = new NoExtraInputOfTurnout();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final NoExtraInputOfTurnout.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.noExtraInputOfTurnout";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    neg find extraInputOfTurnout(T, _)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_T, var___0_), ExtraInputOfTurnout.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "noExtraInputOfTurnout");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("T")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Output.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Output.java
new file mode 100644
index 00000000..615b33af
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Output.java
@@ -0,0 +1,724 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.queries.TurnoutOutput;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern output(S1 : Segment, S2 : Segment) {
+ *              Segment.connectedTo(S1, S2);
+ *         } or {
+ *              find turnoutOutput(S1, S2);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Output extends BaseGeneratedEMFQuerySpecification<Output.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.output pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS1;
+    
+    private Segment fS2;
+    
+    private static List<String> parameterNames = makeImmutableList("S1", "S2");
+    
+    private Match(final Segment pS1, final Segment pS2) {
+      this.fS1 = pS1;
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S1": return this.fS1;
+          case "S2": return this.fS2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS1;
+          case 1: return this.fS2;
+          default: return null;
+      }
+    }
+    
+    public Segment getS1() {
+      return this.fS1;
+    }
+    
+    public Segment getS2() {
+      return this.fS2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S1".equals(parameterName) ) {
+          this.fS1 = (Segment) newValue;
+          return true;
+      }
+      if ("S2".equals(parameterName) ) {
+          this.fS2 = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS1(final Segment pS1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS1 = pS1;
+    }
+    
+    public void setS2(final Segment pS2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.output";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Output.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS1, fS2};
+    }
+    
+    @Override
+    public Output.Match toImmutable() {
+      return isMutable() ? newMatch(fS1, fS2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S1\"=" + prettyPrintValue(fS1) + ", ");
+      result.append("\"S2\"=" + prettyPrintValue(fS2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS1, fS2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Output.Match)) {
+          Output.Match other = (Output.Match) obj;
+          return Objects.equals(fS1, other.fS1) && Objects.equals(fS2, other.fS2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Output specification() {
+      return Output.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Output.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Output.Match newMutableMatch(final Segment pS1, final Segment pS2) {
+      return new Mutable(pS1, pS2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Output.Match newMatch(final Segment pS1, final Segment pS2) {
+      return new Immutable(pS1, pS2);
+    }
+    
+    private static final class Mutable extends Output.Match {
+      Mutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Output.Match {
+      Immutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.output pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern output(S1 : Segment, S2 : Segment) {
+   *    Segment.connectedTo(S1, S2);
+   * } or {
+   *    find turnoutOutput(S1, S2);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Output
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Output.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Output.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Output.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S1 = 0;
+    
+    private static final int POSITION_S2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Output.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Output.Match> getAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Output.Match> streamAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Output.Match> getOneArbitraryMatch(final Segment pS1, final Segment pS2) {
+      return rawGetOneArbitraryMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS1, final Segment pS2) {
+      return rawHasMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS1, final Segment pS2) {
+      return rawCountMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS1, final Segment pS2, final Consumer<? super Output.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS1, pS2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Output.Match newMatch(final Segment pS1, final Segment pS2) {
+      return Output.Match.newMatch(pS1, pS2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S1, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Output.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Output.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S2, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Output.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Output.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected Output.Match tupleToMatch(final Tuple t) {
+      try {
+          return Output.Match.newMatch((Segment) t.get(POSITION_S1), (Segment) t.get(POSITION_S2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Output.Match arrayToMatch(final Object[] match) {
+      try {
+          return Output.Match.newMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Output.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Output.Match.newMutableMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Output.Matcher> querySpecification() {
+      return Output.instance();
+    }
+  }
+  
+  private Output() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Output instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Output.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Output.Matcher.on(engine);
+  }
+  
+  @Override
+  public Output.Matcher instantiate() {
+    return Output.Matcher.create();
+  }
+  
+  @Override
+  public Output.Match newEmptyMatch() {
+    return Output.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Output.Match newMatch(final Object... parameters) {
+    return Output.Match.newMatch((modes3.Segment) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Output} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Output#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Output INSTANCE = new Output();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Output.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S1 = new PParameter("S1", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S2 = new PParameter("S2", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S1, parameter_S2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.output";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S1","S2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    Segment.connectedTo(S1, S2)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment", "connectedTo")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S2);
+          bodies.add(body);
+      }
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    find turnoutOutput(S1, S2)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_S1, var_S2), TurnoutOutput.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/OutputReflexive.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/OutputReflexive.java
new file mode 100644
index 00000000..3d90ede5
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/OutputReflexive.java
@@ -0,0 +1,559 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Turnout;
+import modes3.queries.TurnoutOutput;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "outputReflexive", severity = "error", key = { T })
+ *         pattern outputReflexive(T : Turnout) {
+ *              find turnoutOutput(T, T);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class OutputReflexive extends BaseGeneratedEMFQuerySpecification<OutputReflexive.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.outputReflexive pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.outputReflexive";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return OutputReflexive.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public OutputReflexive.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof OutputReflexive.Match)) {
+          OutputReflexive.Match other = (OutputReflexive.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public OutputReflexive specification() {
+      return OutputReflexive.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static OutputReflexive.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static OutputReflexive.Match newMutableMatch(final Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static OutputReflexive.Match newMatch(final Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends OutputReflexive.Match {
+      Mutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends OutputReflexive.Match {
+      Immutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.outputReflexive pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "outputReflexive", severity = "error", key = { T })
+   * pattern outputReflexive(T : Turnout) {
+   *    find turnoutOutput(T, T);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see OutputReflexive
+   * 
+   */
+  public static class Matcher extends BaseMatcher<OutputReflexive.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static OutputReflexive.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static OutputReflexive.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(OutputReflexive.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<OutputReflexive.Match> getAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<OutputReflexive.Match> streamAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<OutputReflexive.Match> getOneArbitraryMatch(final Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Consumer<? super OutputReflexive.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public OutputReflexive.Match newMatch(final Turnout pT) {
+      return OutputReflexive.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected OutputReflexive.Match tupleToMatch(final Tuple t) {
+      try {
+          return OutputReflexive.Match.newMatch((Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected OutputReflexive.Match arrayToMatch(final Object[] match) {
+      try {
+          return OutputReflexive.Match.newMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected OutputReflexive.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return OutputReflexive.Match.newMutableMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<OutputReflexive.Matcher> querySpecification() {
+      return OutputReflexive.instance();
+    }
+  }
+  
+  private OutputReflexive() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static OutputReflexive instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected OutputReflexive.Matcher instantiate(final ViatraQueryEngine engine) {
+    return OutputReflexive.Matcher.on(engine);
+  }
+  
+  @Override
+  public OutputReflexive.Matcher instantiate() {
+    return OutputReflexive.Matcher.create();
+  }
+  
+  @Override
+  public OutputReflexive.Match newEmptyMatch() {
+    return OutputReflexive.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public OutputReflexive.Match newMatch(final Object... parameters) {
+    return OutputReflexive.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link OutputReflexive} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link OutputReflexive#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final OutputReflexive INSTANCE = new OutputReflexive();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final OutputReflexive.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.outputReflexive";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    find turnoutOutput(T, T)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_T, var_T), TurnoutOutput.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "outputReflexive");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("T")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Reachable.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Reachable.java
new file mode 100644
index 00000000..93d43c21
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Reachable.java
@@ -0,0 +1,719 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.queries.Adjacent;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.BinaryTransitiveClosure;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern reachable(S1 : Segment, S2 : Segment) {
+ *              S1 == S2;
+ *         } or {
+ *              find adjacent+(S1, S2);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Reachable extends BaseGeneratedEMFQuerySpecification<Reachable.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.reachable pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS1;
+    
+    private Segment fS2;
+    
+    private static List<String> parameterNames = makeImmutableList("S1", "S2");
+    
+    private Match(final Segment pS1, final Segment pS2) {
+      this.fS1 = pS1;
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S1": return this.fS1;
+          case "S2": return this.fS2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS1;
+          case 1: return this.fS2;
+          default: return null;
+      }
+    }
+    
+    public Segment getS1() {
+      return this.fS1;
+    }
+    
+    public Segment getS2() {
+      return this.fS2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S1".equals(parameterName) ) {
+          this.fS1 = (Segment) newValue;
+          return true;
+      }
+      if ("S2".equals(parameterName) ) {
+          this.fS2 = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS1(final Segment pS1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS1 = pS1;
+    }
+    
+    public void setS2(final Segment pS2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.reachable";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Reachable.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS1, fS2};
+    }
+    
+    @Override
+    public Reachable.Match toImmutable() {
+      return isMutable() ? newMatch(fS1, fS2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S1\"=" + prettyPrintValue(fS1) + ", ");
+      result.append("\"S2\"=" + prettyPrintValue(fS2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS1, fS2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Reachable.Match)) {
+          Reachable.Match other = (Reachable.Match) obj;
+          return Objects.equals(fS1, other.fS1) && Objects.equals(fS2, other.fS2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Reachable specification() {
+      return Reachable.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Reachable.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Reachable.Match newMutableMatch(final Segment pS1, final Segment pS2) {
+      return new Mutable(pS1, pS2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Reachable.Match newMatch(final Segment pS1, final Segment pS2) {
+      return new Immutable(pS1, pS2);
+    }
+    
+    private static final class Mutable extends Reachable.Match {
+      Mutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Reachable.Match {
+      Immutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.reachable pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern reachable(S1 : Segment, S2 : Segment) {
+   *    S1 == S2;
+   * } or {
+   *    find adjacent+(S1, S2);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Reachable
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Reachable.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Reachable.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Reachable.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S1 = 0;
+    
+    private static final int POSITION_S2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Reachable.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Reachable.Match> getAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Reachable.Match> streamAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Reachable.Match> getOneArbitraryMatch(final Segment pS1, final Segment pS2) {
+      return rawGetOneArbitraryMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS1, final Segment pS2) {
+      return rawHasMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS1, final Segment pS2) {
+      return rawCountMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS1, final Segment pS2, final Consumer<? super Reachable.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS1, pS2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Reachable.Match newMatch(final Segment pS1, final Segment pS2) {
+      return Reachable.Match.newMatch(pS1, pS2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S1, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Reachable.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Reachable.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S2, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Reachable.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Reachable.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected Reachable.Match tupleToMatch(final Tuple t) {
+      try {
+          return Reachable.Match.newMatch((Segment) t.get(POSITION_S1), (Segment) t.get(POSITION_S2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Reachable.Match arrayToMatch(final Object[] match) {
+      try {
+          return Reachable.Match.newMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Reachable.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Reachable.Match.newMutableMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Reachable.Matcher> querySpecification() {
+      return Reachable.instance();
+    }
+  }
+  
+  private Reachable() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Reachable instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Reachable.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Reachable.Matcher.on(engine);
+  }
+  
+  @Override
+  public Reachable.Matcher instantiate() {
+    return Reachable.Matcher.create();
+  }
+  
+  @Override
+  public Reachable.Match newEmptyMatch() {
+    return Reachable.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Reachable.Match newMatch(final Object... parameters) {
+    return Reachable.Match.newMatch((modes3.Segment) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Reachable} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Reachable#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Reachable INSTANCE = new Reachable();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Reachable.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S1 = new PParameter("S1", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S2 = new PParameter("S2", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S1, parameter_S2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.reachable";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S1","S2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    S1 == S2
+          new Equality(body, var_S1, var_S2);
+          bodies.add(body);
+      }
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    find adjacent+(S1, S2)
+          new BinaryTransitiveClosure(body, Tuples.flatTupleOf(var_S1, var_S2), Adjacent.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TooManyExtraInputsOfTurnout.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TooManyExtraInputsOfTurnout.java
new file mode 100644
index 00000000..9f417795
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TooManyExtraInputsOfTurnout.java
@@ -0,0 +1,570 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Turnout;
+import modes3.queries.ExtraInputOfTurnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "tooManyExtraInputsOfTurnout", severity = "error", key = { T })
+ *         pattern tooManyExtraInputsOfTurnout(T : Turnout) {
+ *              find extraInputOfTurnout(T, I1);
+ *              find extraInputOfTurnout(T, I2);
+ *              I1 != I2;
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TooManyExtraInputsOfTurnout extends BaseGeneratedEMFQuerySpecification<TooManyExtraInputsOfTurnout.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.tooManyExtraInputsOfTurnout pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.tooManyExtraInputsOfTurnout";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TooManyExtraInputsOfTurnout.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public TooManyExtraInputsOfTurnout.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TooManyExtraInputsOfTurnout.Match)) {
+          TooManyExtraInputsOfTurnout.Match other = (TooManyExtraInputsOfTurnout.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TooManyExtraInputsOfTurnout specification() {
+      return TooManyExtraInputsOfTurnout.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TooManyExtraInputsOfTurnout.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TooManyExtraInputsOfTurnout.Match newMutableMatch(final Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TooManyExtraInputsOfTurnout.Match newMatch(final Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends TooManyExtraInputsOfTurnout.Match {
+      Mutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TooManyExtraInputsOfTurnout.Match {
+      Immutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.tooManyExtraInputsOfTurnout pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "tooManyExtraInputsOfTurnout", severity = "error", key = { T })
+   * pattern tooManyExtraInputsOfTurnout(T : Turnout) {
+   *    find extraInputOfTurnout(T, I1);
+   *    find extraInputOfTurnout(T, I2);
+   *    I1 != I2;
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TooManyExtraInputsOfTurnout
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TooManyExtraInputsOfTurnout.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TooManyExtraInputsOfTurnout.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TooManyExtraInputsOfTurnout.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TooManyExtraInputsOfTurnout.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TooManyExtraInputsOfTurnout.Match> getAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TooManyExtraInputsOfTurnout.Match> streamAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TooManyExtraInputsOfTurnout.Match> getOneArbitraryMatch(final Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Consumer<? super TooManyExtraInputsOfTurnout.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TooManyExtraInputsOfTurnout.Match newMatch(final Turnout pT) {
+      return TooManyExtraInputsOfTurnout.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected TooManyExtraInputsOfTurnout.Match tupleToMatch(final Tuple t) {
+      try {
+          return TooManyExtraInputsOfTurnout.Match.newMatch((Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TooManyExtraInputsOfTurnout.Match arrayToMatch(final Object[] match) {
+      try {
+          return TooManyExtraInputsOfTurnout.Match.newMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TooManyExtraInputsOfTurnout.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TooManyExtraInputsOfTurnout.Match.newMutableMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TooManyExtraInputsOfTurnout.Matcher> querySpecification() {
+      return TooManyExtraInputsOfTurnout.instance();
+    }
+  }
+  
+  private TooManyExtraInputsOfTurnout() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TooManyExtraInputsOfTurnout instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TooManyExtraInputsOfTurnout.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TooManyExtraInputsOfTurnout.Matcher.on(engine);
+  }
+  
+  @Override
+  public TooManyExtraInputsOfTurnout.Matcher instantiate() {
+    return TooManyExtraInputsOfTurnout.Matcher.create();
+  }
+  
+  @Override
+  public TooManyExtraInputsOfTurnout.Match newEmptyMatch() {
+    return TooManyExtraInputsOfTurnout.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TooManyExtraInputsOfTurnout.Match newMatch(final Object... parameters) {
+    return TooManyExtraInputsOfTurnout.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TooManyExtraInputsOfTurnout} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TooManyExtraInputsOfTurnout#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TooManyExtraInputsOfTurnout INSTANCE = new TooManyExtraInputsOfTurnout();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TooManyExtraInputsOfTurnout.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.tooManyExtraInputsOfTurnout";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var_I1 = body.getOrCreateVariableByName("I1");
+          PVariable var_I2 = body.getOrCreateVariableByName("I2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    find extraInputOfTurnout(T, I1)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_T, var_I1), ExtraInputOfTurnout.instance().getInternalQueryRepresentation());
+          //    find extraInputOfTurnout(T, I2)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_T, var_I2), ExtraInputOfTurnout.instance().getInternalQueryRepresentation());
+          //    I1 != I2
+          new Inequality(body, var_I1, var_I2);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "tooManyExtraInputsOfTurnout");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("T")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TooManyInputsOfSegment.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TooManyInputsOfSegment.java
new file mode 100644
index 00000000..e5e8827c
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TooManyInputsOfSegment.java
@@ -0,0 +1,601 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.queries.Output;
+import modes3.queries.Turnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         //{@literal @}Constraint(message = "noInputOfSegment", severity = "error", key = { S })
+ *         //pattern noInputOfSegment(S : Segment) {
+ *         //   neg find turnout(S);
+ *         //   neg find output(_, S);
+ *         //}
+ *         
+ *         {@literal @}Constraint(message = "tooManyInputsOfSegment", severity = "error", key = { S })
+ *         pattern tooManyInputsOfSegment(S : Segment) {
+ *              neg find turnout(S);
+ *              find output(I1, S);
+ *              find output(I2, S);
+ *              find output(I3, S);
+ *              I1 != I2;
+ *              I1 != I3;
+ *              I2 != I3;
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TooManyInputsOfSegment extends BaseGeneratedEMFQuerySpecification<TooManyInputsOfSegment.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.tooManyInputsOfSegment pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS;
+    
+    private static List<String> parameterNames = makeImmutableList("S");
+    
+    private Match(final Segment pS) {
+      this.fS = pS;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S": return this.fS;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS;
+          default: return null;
+      }
+    }
+    
+    public Segment getS() {
+      return this.fS;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S".equals(parameterName) ) {
+          this.fS = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS(final Segment pS) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS = pS;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.tooManyInputsOfSegment";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TooManyInputsOfSegment.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS};
+    }
+    
+    @Override
+    public TooManyInputsOfSegment.Match toImmutable() {
+      return isMutable() ? newMatch(fS) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S\"=" + prettyPrintValue(fS));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TooManyInputsOfSegment.Match)) {
+          TooManyInputsOfSegment.Match other = (TooManyInputsOfSegment.Match) obj;
+          return Objects.equals(fS, other.fS);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TooManyInputsOfSegment specification() {
+      return TooManyInputsOfSegment.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TooManyInputsOfSegment.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TooManyInputsOfSegment.Match newMutableMatch(final Segment pS) {
+      return new Mutable(pS);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TooManyInputsOfSegment.Match newMatch(final Segment pS) {
+      return new Immutable(pS);
+    }
+    
+    private static final class Mutable extends TooManyInputsOfSegment.Match {
+      Mutable(final Segment pS) {
+        super(pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TooManyInputsOfSegment.Match {
+      Immutable(final Segment pS) {
+        super(pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.tooManyInputsOfSegment pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * //{@literal @}Constraint(message = "noInputOfSegment", severity = "error", key = { S })
+   * //pattern noInputOfSegment(S : Segment) {
+   * // neg find turnout(S);
+   * // neg find output(_, S);
+   * //}
+   * 
+   * {@literal @}Constraint(message = "tooManyInputsOfSegment", severity = "error", key = { S })
+   * pattern tooManyInputsOfSegment(S : Segment) {
+   *    neg find turnout(S);
+   *    find output(I1, S);
+   *    find output(I2, S);
+   *    find output(I3, S);
+   *    I1 != I2;
+   *    I1 != I3;
+   *    I2 != I3;
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TooManyInputsOfSegment
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TooManyInputsOfSegment.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TooManyInputsOfSegment.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TooManyInputsOfSegment.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TooManyInputsOfSegment.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TooManyInputsOfSegment.Match> getAllMatches(final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pS}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TooManyInputsOfSegment.Match> streamAllMatches(final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pS});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TooManyInputsOfSegment.Match> getOneArbitraryMatch(final Segment pS) {
+      return rawGetOneArbitraryMatch(new Object[]{pS});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS) {
+      return rawHasMatch(new Object[]{pS});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS) {
+      return rawCountMatches(new Object[]{pS});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS, final Consumer<? super TooManyInputsOfSegment.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TooManyInputsOfSegment.Match newMatch(final Segment pS) {
+      return TooManyInputsOfSegment.Match.newMatch(pS);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray());
+    }
+    
+    @Override
+    protected TooManyInputsOfSegment.Match tupleToMatch(final Tuple t) {
+      try {
+          return TooManyInputsOfSegment.Match.newMatch((Segment) t.get(POSITION_S));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TooManyInputsOfSegment.Match arrayToMatch(final Object[] match) {
+      try {
+          return TooManyInputsOfSegment.Match.newMatch((Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TooManyInputsOfSegment.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TooManyInputsOfSegment.Match.newMutableMatch((Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TooManyInputsOfSegment.Matcher> querySpecification() {
+      return TooManyInputsOfSegment.instance();
+    }
+  }
+  
+  private TooManyInputsOfSegment() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TooManyInputsOfSegment instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TooManyInputsOfSegment.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TooManyInputsOfSegment.Matcher.on(engine);
+  }
+  
+  @Override
+  public TooManyInputsOfSegment.Matcher instantiate() {
+    return TooManyInputsOfSegment.Matcher.create();
+  }
+  
+  @Override
+  public TooManyInputsOfSegment.Match newEmptyMatch() {
+    return TooManyInputsOfSegment.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TooManyInputsOfSegment.Match newMatch(final Object... parameters) {
+    return TooManyInputsOfSegment.Match.newMatch((modes3.Segment) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TooManyInputsOfSegment} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TooManyInputsOfSegment#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TooManyInputsOfSegment INSTANCE = new TooManyInputsOfSegment();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TooManyInputsOfSegment.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S = new PParameter("S", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.tooManyInputsOfSegment";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S = body.getOrCreateVariableByName("S");
+          PVariable var_I1 = body.getOrCreateVariableByName("I1");
+          PVariable var_I2 = body.getOrCreateVariableByName("I2");
+          PVariable var_I3 = body.getOrCreateVariableByName("I3");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S, parameter_S)
+          ));
+          //    neg find turnout(S)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_S), Turnout.instance().getInternalQueryRepresentation());
+          //    find output(I1, S)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_I1, var_S), Output.instance().getInternalQueryRepresentation());
+          //    find output(I2, S)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_I2, var_S), Output.instance().getInternalQueryRepresentation());
+          //    find output(I3, S)
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_I3, var_S), Output.instance().getInternalQueryRepresentation());
+          //    I1 != I2
+          new Inequality(body, var_I1, var_I2);
+          //    I1 != I3
+          new Inequality(body, var_I1, var_I3);
+          //    I2 != I3
+          new Inequality(body, var_I2, var_I3);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "tooManyInputsOfSegment");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("S")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Turnout.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Turnout.java
new file mode 100644
index 00000000..34c7631c
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Turnout.java
@@ -0,0 +1,543 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern turnout(T : Turnout) {
+ *              Turnout(T);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Turnout extends BaseGeneratedEMFQuerySpecification<Turnout.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.turnout pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private modes3.Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final modes3.Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public modes3.Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (modes3.Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final modes3.Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.turnout";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Turnout.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public Turnout.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Turnout.Match)) {
+          Turnout.Match other = (Turnout.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Turnout specification() {
+      return Turnout.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Turnout.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Turnout.Match newMutableMatch(final modes3.Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Turnout.Match newMatch(final modes3.Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends Turnout.Match {
+      Mutable(final modes3.Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Turnout.Match {
+      Immutable(final modes3.Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.turnout pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern turnout(T : Turnout) {
+   *    Turnout(T);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Turnout
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Turnout.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Turnout.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Turnout.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Turnout.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Turnout.Match> getAllMatches(final modes3.Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Turnout.Match> streamAllMatches(final modes3.Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Turnout.Match> getOneArbitraryMatch(final modes3.Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final modes3.Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final modes3.Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final modes3.Turnout pT, final Consumer<? super Turnout.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Turnout.Match newMatch(final modes3.Turnout pT) {
+      return Turnout.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<modes3.Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(modes3.Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<modes3.Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<modes3.Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected Turnout.Match tupleToMatch(final Tuple t) {
+      try {
+          return Turnout.Match.newMatch((modes3.Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Turnout.Match arrayToMatch(final Object[] match) {
+      try {
+          return Turnout.Match.newMatch((modes3.Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Turnout.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Turnout.Match.newMutableMatch((modes3.Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Turnout.Matcher> querySpecification() {
+      return Turnout.instance();
+    }
+  }
+  
+  private Turnout() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Turnout instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Turnout.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Turnout.Matcher.on(engine);
+  }
+  
+  @Override
+  public Turnout.Matcher instantiate() {
+    return Turnout.Matcher.create();
+  }
+  
+  @Override
+  public Turnout.Match newEmptyMatch() {
+    return Turnout.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Turnout.Match newMatch(final Object... parameters) {
+    return Turnout.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Turnout} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Turnout#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Turnout INSTANCE = new Turnout();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Turnout.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.turnout";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    Turnout(T)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutConnectedToBothOutputs.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutConnectedToBothOutputs.java
new file mode 100644
index 00000000..674bb275
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutConnectedToBothOutputs.java
@@ -0,0 +1,589 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Turnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "turnoutConnectedToBothOutputs", severity = "error", key = { T })
+ *         pattern turnoutConnectedToBothOutputs(T : Turnout) {
+ *              Turnout.straight(T, Straight);
+ *              Turnout.divergent(T, Divergent);
+ *              Segment.connectedTo(T, Straight);
+ *              Segment.connectedTo(T, Divergent);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TurnoutConnectedToBothOutputs extends BaseGeneratedEMFQuerySpecification<TurnoutConnectedToBothOutputs.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.turnoutConnectedToBothOutputs pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.turnoutConnectedToBothOutputs";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TurnoutConnectedToBothOutputs.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public TurnoutConnectedToBothOutputs.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TurnoutConnectedToBothOutputs.Match)) {
+          TurnoutConnectedToBothOutputs.Match other = (TurnoutConnectedToBothOutputs.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TurnoutConnectedToBothOutputs specification() {
+      return TurnoutConnectedToBothOutputs.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TurnoutConnectedToBothOutputs.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TurnoutConnectedToBothOutputs.Match newMutableMatch(final Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TurnoutConnectedToBothOutputs.Match newMatch(final Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends TurnoutConnectedToBothOutputs.Match {
+      Mutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TurnoutConnectedToBothOutputs.Match {
+      Immutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.turnoutConnectedToBothOutputs pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "turnoutConnectedToBothOutputs", severity = "error", key = { T })
+   * pattern turnoutConnectedToBothOutputs(T : Turnout) {
+   *    Turnout.straight(T, Straight);
+   *    Turnout.divergent(T, Divergent);
+   *    Segment.connectedTo(T, Straight);
+   *    Segment.connectedTo(T, Divergent);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TurnoutConnectedToBothOutputs
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TurnoutConnectedToBothOutputs.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TurnoutConnectedToBothOutputs.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TurnoutConnectedToBothOutputs.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TurnoutConnectedToBothOutputs.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TurnoutConnectedToBothOutputs.Match> getAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TurnoutConnectedToBothOutputs.Match> streamAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TurnoutConnectedToBothOutputs.Match> getOneArbitraryMatch(final Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Consumer<? super TurnoutConnectedToBothOutputs.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TurnoutConnectedToBothOutputs.Match newMatch(final Turnout pT) {
+      return TurnoutConnectedToBothOutputs.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected TurnoutConnectedToBothOutputs.Match tupleToMatch(final Tuple t) {
+      try {
+          return TurnoutConnectedToBothOutputs.Match.newMatch((Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutConnectedToBothOutputs.Match arrayToMatch(final Object[] match) {
+      try {
+          return TurnoutConnectedToBothOutputs.Match.newMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutConnectedToBothOutputs.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TurnoutConnectedToBothOutputs.Match.newMutableMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TurnoutConnectedToBothOutputs.Matcher> querySpecification() {
+      return TurnoutConnectedToBothOutputs.instance();
+    }
+  }
+  
+  private TurnoutConnectedToBothOutputs() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TurnoutConnectedToBothOutputs instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TurnoutConnectedToBothOutputs.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TurnoutConnectedToBothOutputs.Matcher.on(engine);
+  }
+  
+  @Override
+  public TurnoutConnectedToBothOutputs.Matcher instantiate() {
+    return TurnoutConnectedToBothOutputs.Matcher.create();
+  }
+  
+  @Override
+  public TurnoutConnectedToBothOutputs.Match newEmptyMatch() {
+    return TurnoutConnectedToBothOutputs.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TurnoutConnectedToBothOutputs.Match newMatch(final Object... parameters) {
+    return TurnoutConnectedToBothOutputs.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TurnoutConnectedToBothOutputs} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TurnoutConnectedToBothOutputs#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TurnoutConnectedToBothOutputs INSTANCE = new TurnoutConnectedToBothOutputs();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TurnoutConnectedToBothOutputs.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.turnoutConnectedToBothOutputs";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var_Straight = body.getOrCreateVariableByName("Straight");
+          PVariable var_Divergent = body.getOrCreateVariableByName("Divergent");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    Turnout.straight(T, Straight)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "straight")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_Straight);
+          //    Turnout.divergent(T, Divergent)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "divergent")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_1_, var_Divergent);
+          //    Segment.connectedTo(T, Straight)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          PVariable var__virtual_2_ = body.getOrCreateVariableByName(".virtual{2}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_2_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment", "connectedTo")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_2_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_2_, var_Straight);
+          //    Segment.connectedTo(T, Divergent)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          PVariable var__virtual_3_ = body.getOrCreateVariableByName(".virtual{3}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_3_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment", "connectedTo")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_3_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_3_, var_Divergent);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "turnoutConnectedToBothOutputs");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("T")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutInSegments.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutInSegments.java
new file mode 100644
index 00000000..9c9a5d18
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutInSegments.java
@@ -0,0 +1,564 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Turnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "turnoutInSegments", severity = "error", key = { T })
+ *         pattern turnoutInSegments(T : Turnout) {
+ *              Modes3ModelRoot.segments(_, T);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TurnoutInSegments extends BaseGeneratedEMFQuerySpecification<TurnoutInSegments.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.turnoutInSegments pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.turnoutInSegments";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TurnoutInSegments.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public TurnoutInSegments.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TurnoutInSegments.Match)) {
+          TurnoutInSegments.Match other = (TurnoutInSegments.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TurnoutInSegments specification() {
+      return TurnoutInSegments.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TurnoutInSegments.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TurnoutInSegments.Match newMutableMatch(final Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TurnoutInSegments.Match newMatch(final Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends TurnoutInSegments.Match {
+      Mutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TurnoutInSegments.Match {
+      Immutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.turnoutInSegments pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "turnoutInSegments", severity = "error", key = { T })
+   * pattern turnoutInSegments(T : Turnout) {
+   *    Modes3ModelRoot.segments(_, T);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TurnoutInSegments
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TurnoutInSegments.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TurnoutInSegments.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TurnoutInSegments.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TurnoutInSegments.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TurnoutInSegments.Match> getAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TurnoutInSegments.Match> streamAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TurnoutInSegments.Match> getOneArbitraryMatch(final Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Consumer<? super TurnoutInSegments.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TurnoutInSegments.Match newMatch(final Turnout pT) {
+      return TurnoutInSegments.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected TurnoutInSegments.Match tupleToMatch(final Tuple t) {
+      try {
+          return TurnoutInSegments.Match.newMatch((Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutInSegments.Match arrayToMatch(final Object[] match) {
+      try {
+          return TurnoutInSegments.Match.newMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutInSegments.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TurnoutInSegments.Match.newMutableMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TurnoutInSegments.Matcher> querySpecification() {
+      return TurnoutInSegments.instance();
+    }
+  }
+  
+  private TurnoutInSegments() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TurnoutInSegments instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TurnoutInSegments.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TurnoutInSegments.Matcher.on(engine);
+  }
+  
+  @Override
+  public TurnoutInSegments.Matcher instantiate() {
+    return TurnoutInSegments.Matcher.create();
+  }
+  
+  @Override
+  public TurnoutInSegments.Match newEmptyMatch() {
+    return TurnoutInSegments.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TurnoutInSegments.Match newMatch(final Object... parameters) {
+    return TurnoutInSegments.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TurnoutInSegments} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TurnoutInSegments#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TurnoutInSegments INSTANCE = new TurnoutInSegments();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TurnoutInSegments.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.turnoutInSegments";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    Modes3ModelRoot.segments(_, T)
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Modes3ModelRoot")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Modes3ModelRoot", "segments")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_T);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "turnoutInSegments");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("T")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutOutput.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutOutput.java
new file mode 100644
index 00000000..87cccfde
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutOutput.java
@@ -0,0 +1,727 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.Turnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         pattern turnoutOutput(T : Turnout, S : Segment) {
+ *              Turnout.straight(T, S);
+ *         } or {
+ *              Turnout.divergent(T, S);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TurnoutOutput extends BaseGeneratedEMFQuerySpecification<TurnoutOutput.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.turnoutOutput pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private Segment fS;
+    
+    private static List<String> parameterNames = makeImmutableList("T", "S");
+    
+    private Match(final Turnout pT, final Segment pS) {
+      this.fT = pT;
+      this.fS = pS;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          case "S": return this.fS;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          case 1: return this.fS;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    public Segment getS() {
+      return this.fS;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      if ("S".equals(parameterName) ) {
+          this.fS = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    public void setS(final Segment pS) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS = pS;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.turnoutOutput";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TurnoutOutput.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT, fS};
+    }
+    
+    @Override
+    public TurnoutOutput.Match toImmutable() {
+      return isMutable() ? newMatch(fT, fS) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT) + ", ");
+      result.append("\"S\"=" + prettyPrintValue(fS));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT, fS);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TurnoutOutput.Match)) {
+          TurnoutOutput.Match other = (TurnoutOutput.Match) obj;
+          return Objects.equals(fT, other.fT) && Objects.equals(fS, other.fS);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TurnoutOutput specification() {
+      return TurnoutOutput.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TurnoutOutput.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TurnoutOutput.Match newMutableMatch(final Turnout pT, final Segment pS) {
+      return new Mutable(pT, pS);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TurnoutOutput.Match newMatch(final Turnout pT, final Segment pS) {
+      return new Immutable(pT, pS);
+    }
+    
+    private static final class Mutable extends TurnoutOutput.Match {
+      Mutable(final Turnout pT, final Segment pS) {
+        super(pT, pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TurnoutOutput.Match {
+      Immutable(final Turnout pT, final Segment pS) {
+        super(pT, pS);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.turnoutOutput pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * pattern turnoutOutput(T : Turnout, S : Segment) {
+   *    Turnout.straight(T, S);
+   * } or {
+   *    Turnout.divergent(T, S);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TurnoutOutput
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TurnoutOutput.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TurnoutOutput.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TurnoutOutput.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final int POSITION_S = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TurnoutOutput.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TurnoutOutput.Match> getAllMatches(final Turnout pT, final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pT, pS}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TurnoutOutput.Match> streamAllMatches(final Turnout pT, final Segment pS) {
+      return rawStreamAllMatches(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TurnoutOutput.Match> getOneArbitraryMatch(final Turnout pT, final Segment pS) {
+      return rawGetOneArbitraryMatch(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT, final Segment pS) {
+      return rawHasMatch(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT, final Segment pS) {
+      return rawCountMatches(new Object[]{pT, pS});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Segment pS, final Consumer<? super TurnoutOutput.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT, pS}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param pS the fixed value of pattern parameter S, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TurnoutOutput.Match newMatch(final Turnout pT, final Segment pS) {
+      return TurnoutOutput.Match.newMatch(pT, pS);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT(final TurnoutOutput.Match partialMatch) {
+      return rawStreamAllValuesOfT(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT(final Segment pS) {
+      return rawStreamAllValuesOfT(new Object[]{null, pS});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT(final TurnoutOutput.Match partialMatch) {
+      return rawStreamAllValuesOfT(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT(final Segment pS) {
+      return rawStreamAllValuesOfT(new Object[]{null, pS}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS() {
+      return rawStreamAllValuesOfS(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS(final TurnoutOutput.Match partialMatch) {
+      return rawStreamAllValuesOfS(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS(final Turnout pT) {
+      return rawStreamAllValuesOfS(new Object[]{pT, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS(final TurnoutOutput.Match partialMatch) {
+      return rawStreamAllValuesOfS(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS(final Turnout pT) {
+      return rawStreamAllValuesOfS(new Object[]{pT, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected TurnoutOutput.Match tupleToMatch(final Tuple t) {
+      try {
+          return TurnoutOutput.Match.newMatch((Turnout) t.get(POSITION_T), (Segment) t.get(POSITION_S));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutOutput.Match arrayToMatch(final Object[] match) {
+      try {
+          return TurnoutOutput.Match.newMatch((Turnout) match[POSITION_T], (Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutOutput.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TurnoutOutput.Match.newMutableMatch((Turnout) match[POSITION_T], (Segment) match[POSITION_S]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TurnoutOutput.Matcher> querySpecification() {
+      return TurnoutOutput.instance();
+    }
+  }
+  
+  private TurnoutOutput() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TurnoutOutput instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TurnoutOutput.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TurnoutOutput.Matcher.on(engine);
+  }
+  
+  @Override
+  public TurnoutOutput.Matcher instantiate() {
+    return TurnoutOutput.Matcher.create();
+  }
+  
+  @Override
+  public TurnoutOutput.Match newEmptyMatch() {
+    return TurnoutOutput.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TurnoutOutput.Match newMatch(final Object... parameters) {
+    return TurnoutOutput.Match.newMatch((modes3.Turnout) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TurnoutOutput} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TurnoutOutput#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TurnoutOutput INSTANCE = new TurnoutOutput();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TurnoutOutput.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S = new PParameter("S", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T, parameter_S);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.turnoutOutput";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T","S");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var_S = body.getOrCreateVariableByName("S");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T),
+             new ExportedParameter(body, var_S, parameter_S)
+          ));
+          //    Turnout.straight(T, S)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "straight")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S);
+          bodies.add(body);
+      }
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var_S = body.getOrCreateVariableByName("S");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T),
+             new ExportedParameter(body, var_S, parameter_S)
+          ));
+          //    Turnout.divergent(T, S)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "divergent")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S);
+          bodies.add(body);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutOutputsAreSame.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutOutputsAreSame.java
new file mode 100644
index 00000000..ba59d45c
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/TurnoutOutputsAreSame.java
@@ -0,0 +1,572 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Turnout;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "turnoutOutputsAreSame", severity = "error", key = { T })
+ *         pattern turnoutOutputsAreSame(T : Turnout) {
+ *              Turnout.straight(T, S);
+ *              Turnout.divergent(T, S);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class TurnoutOutputsAreSame extends BaseGeneratedEMFQuerySpecification<TurnoutOutputsAreSame.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.turnoutOutputsAreSame pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Turnout fT;
+    
+    private static List<String> parameterNames = makeImmutableList("T");
+    
+    private Match(final Turnout pT) {
+      this.fT = pT;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "T": return this.fT;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fT;
+          default: return null;
+      }
+    }
+    
+    public Turnout getT() {
+      return this.fT;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("T".equals(parameterName) ) {
+          this.fT = (Turnout) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setT(final Turnout pT) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fT = pT;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.turnoutOutputsAreSame";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return TurnoutOutputsAreSame.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fT};
+    }
+    
+    @Override
+    public TurnoutOutputsAreSame.Match toImmutable() {
+      return isMutable() ? newMatch(fT) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"T\"=" + prettyPrintValue(fT));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fT);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof TurnoutOutputsAreSame.Match)) {
+          TurnoutOutputsAreSame.Match other = (TurnoutOutputsAreSame.Match) obj;
+          return Objects.equals(fT, other.fT);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public TurnoutOutputsAreSame specification() {
+      return TurnoutOutputsAreSame.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static TurnoutOutputsAreSame.Match newEmptyMatch() {
+      return new Mutable(null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static TurnoutOutputsAreSame.Match newMutableMatch(final Turnout pT) {
+      return new Mutable(pT);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static TurnoutOutputsAreSame.Match newMatch(final Turnout pT) {
+      return new Immutable(pT);
+    }
+    
+    private static final class Mutable extends TurnoutOutputsAreSame.Match {
+      Mutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends TurnoutOutputsAreSame.Match {
+      Immutable(final Turnout pT) {
+        super(pT);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.turnoutOutputsAreSame pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "turnoutOutputsAreSame", severity = "error", key = { T })
+   * pattern turnoutOutputsAreSame(T : Turnout) {
+   *    Turnout.straight(T, S);
+   *    Turnout.divergent(T, S);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see TurnoutOutputsAreSame
+   * 
+   */
+  public static class Matcher extends BaseMatcher<TurnoutOutputsAreSame.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static TurnoutOutputsAreSame.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static TurnoutOutputsAreSame.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_T = 0;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(TurnoutOutputsAreSame.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<TurnoutOutputsAreSame.Match> getAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<TurnoutOutputsAreSame.Match> streamAllMatches(final Turnout pT) {
+      return rawStreamAllMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<TurnoutOutputsAreSame.Match> getOneArbitraryMatch(final Turnout pT) {
+      return rawGetOneArbitraryMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Turnout pT) {
+      return rawHasMatch(new Object[]{pT});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Turnout pT) {
+      return rawCountMatches(new Object[]{pT});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Turnout pT, final Consumer<? super TurnoutOutputsAreSame.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pT}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pT the fixed value of pattern parameter T, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public TurnoutOutputsAreSame.Match newMatch(final Turnout pT) {
+      return TurnoutOutputsAreSame.Match.newMatch(pT);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Turnout> rawStreamAllValuesOfT(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_T, parameters).map(Turnout.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Turnout> getAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for T.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Turnout> streamAllValuesOfT() {
+      return rawStreamAllValuesOfT(emptyArray());
+    }
+    
+    @Override
+    protected TurnoutOutputsAreSame.Match tupleToMatch(final Tuple t) {
+      try {
+          return TurnoutOutputsAreSame.Match.newMatch((Turnout) t.get(POSITION_T));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutOutputsAreSame.Match arrayToMatch(final Object[] match) {
+      try {
+          return TurnoutOutputsAreSame.Match.newMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected TurnoutOutputsAreSame.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return TurnoutOutputsAreSame.Match.newMutableMatch((Turnout) match[POSITION_T]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<TurnoutOutputsAreSame.Matcher> querySpecification() {
+      return TurnoutOutputsAreSame.instance();
+    }
+  }
+  
+  private TurnoutOutputsAreSame() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static TurnoutOutputsAreSame instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected TurnoutOutputsAreSame.Matcher instantiate(final ViatraQueryEngine engine) {
+    return TurnoutOutputsAreSame.Matcher.on(engine);
+  }
+  
+  @Override
+  public TurnoutOutputsAreSame.Matcher instantiate() {
+    return TurnoutOutputsAreSame.Matcher.create();
+  }
+  
+  @Override
+  public TurnoutOutputsAreSame.Match newEmptyMatch() {
+    return TurnoutOutputsAreSame.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public TurnoutOutputsAreSame.Match newMatch(final Object... parameters) {
+    return TurnoutOutputsAreSame.Match.newMatch((modes3.Turnout) parameters[0]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link TurnoutOutputsAreSame} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link TurnoutOutputsAreSame#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final TurnoutOutputsAreSame INSTANCE = new TurnoutOutputsAreSame();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final TurnoutOutputsAreSame.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_T = new PParameter("T", "modes3.Turnout", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_T);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.turnoutOutputsAreSame";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("T");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_T = body.getOrCreateVariableByName("T");
+          PVariable var_S = body.getOrCreateVariableByName("S");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_T, parameter_T)
+          ));
+          //    Turnout.straight(T, S)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "straight")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_0_, var_S);
+          //    Turnout.divergent(T, S)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_T, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Turnout", "divergent")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new Equality(body, var__virtual_1_, var_S);
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "turnoutOutputsAreSame");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("T")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}
diff --git a/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Unreachable.java b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Unreachable.java
new file mode 100644
index 00000000..a1b76f83
--- /dev/null
+++ b/Domains/ca.mcgill.rtgmrt.example.modes3/vql-gen/modes3/queries/Unreachable.java
@@ -0,0 +1,714 @@
+/**
+ * Generated from platform:/resource/ca.mcgill.rtgmrt.example.modes3/src/modes3/queries/Modes3Queries.vql
+ */
+package modes3.queries;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import modes3.Segment;
+import modes3.queries.Reachable;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message = "unreachable", severity = "error", key = { S1, S2 })
+ *         pattern unreachable(S1 : Segment, S2 : Segment) {
+ *              neg find reachable(S1, S2);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class Unreachable extends BaseGeneratedEMFQuerySpecification<Unreachable.Matcher> {
+  /**
+   * Pattern-specific match representation of the modes3.queries.unreachable pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Segment fS1;
+    
+    private Segment fS2;
+    
+    private static List<String> parameterNames = makeImmutableList("S1", "S2");
+    
+    private Match(final Segment pS1, final Segment pS2) {
+      this.fS1 = pS1;
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "S1": return this.fS1;
+          case "S2": return this.fS2;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fS1;
+          case 1: return this.fS2;
+          default: return null;
+      }
+    }
+    
+    public Segment getS1() {
+      return this.fS1;
+    }
+    
+    public Segment getS2() {
+      return this.fS2;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("S1".equals(parameterName) ) {
+          this.fS1 = (Segment) newValue;
+          return true;
+      }
+      if ("S2".equals(parameterName) ) {
+          this.fS2 = (Segment) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setS1(final Segment pS1) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS1 = pS1;
+    }
+    
+    public void setS2(final Segment pS2) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fS2 = pS2;
+    }
+    
+    @Override
+    public String patternName() {
+      return "modes3.queries.unreachable";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return Unreachable.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fS1, fS2};
+    }
+    
+    @Override
+    public Unreachable.Match toImmutable() {
+      return isMutable() ? newMatch(fS1, fS2) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"S1\"=" + prettyPrintValue(fS1) + ", ");
+      result.append("\"S2\"=" + prettyPrintValue(fS2));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fS1, fS2);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof Unreachable.Match)) {
+          Unreachable.Match other = (Unreachable.Match) obj;
+          return Objects.equals(fS1, other.fS1) && Objects.equals(fS2, other.fS2);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public Unreachable specification() {
+      return Unreachable.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static Unreachable.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static Unreachable.Match newMutableMatch(final Segment pS1, final Segment pS2) {
+      return new Mutable(pS1, pS2);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static Unreachable.Match newMatch(final Segment pS1, final Segment pS2) {
+      return new Immutable(pS1, pS2);
+    }
+    
+    private static final class Mutable extends Unreachable.Match {
+      Mutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends Unreachable.Match {
+      Immutable(final Segment pS1, final Segment pS2) {
+        super(pS1, pS2);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the modes3.queries.unreachable pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message = "unreachable", severity = "error", key = { S1, S2 })
+   * pattern unreachable(S1 : Segment, S2 : Segment) {
+   *    neg find reachable(S1, S2);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see Unreachable
+   * 
+   */
+  public static class Matcher extends BaseMatcher<Unreachable.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static Unreachable.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static Unreachable.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_S1 = 0;
+    
+    private static final int POSITION_S2 = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(Unreachable.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<Unreachable.Match> getAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<Unreachable.Match> streamAllMatches(final Segment pS1, final Segment pS2) {
+      return rawStreamAllMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<Unreachable.Match> getOneArbitraryMatch(final Segment pS1, final Segment pS2) {
+      return rawGetOneArbitraryMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Segment pS1, final Segment pS2) {
+      return rawHasMatch(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Segment pS1, final Segment pS2) {
+      return rawCountMatches(new Object[]{pS1, pS2});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Segment pS1, final Segment pS2, final Consumer<? super Unreachable.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pS1, pS2}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pS1 the fixed value of pattern parameter S1, or null if not bound.
+     * @param pS2 the fixed value of pattern parameter S2, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public Unreachable.Match newMatch(final Segment pS1, final Segment pS2) {
+      return Unreachable.Match.newMatch(pS1, pS2);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS1(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S1, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1() {
+      return rawStreamAllValuesOfS1(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Unreachable.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Unreachable.Match partialMatch) {
+      return rawStreamAllValuesOfS1(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S1.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS1(final Segment pS2) {
+      return rawStreamAllValuesOfS1(new Object[]{null, pS2}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Segment> rawStreamAllValuesOfS2(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_S2, parameters).map(Segment.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2() {
+      return rawStreamAllValuesOfS2(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Unreachable.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Segment> streamAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Unreachable.Match partialMatch) {
+      return rawStreamAllValuesOfS2(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for S2.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Segment> getAllValuesOfS2(final Segment pS1) {
+      return rawStreamAllValuesOfS2(new Object[]{pS1, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected Unreachable.Match tupleToMatch(final Tuple t) {
+      try {
+          return Unreachable.Match.newMatch((Segment) t.get(POSITION_S1), (Segment) t.get(POSITION_S2));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Unreachable.Match arrayToMatch(final Object[] match) {
+      try {
+          return Unreachable.Match.newMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected Unreachable.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return Unreachable.Match.newMutableMatch((Segment) match[POSITION_S1], (Segment) match[POSITION_S2]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<Unreachable.Matcher> querySpecification() {
+      return Unreachable.instance();
+    }
+  }
+  
+  private Unreachable() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static Unreachable instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected Unreachable.Matcher instantiate(final ViatraQueryEngine engine) {
+    return Unreachable.Matcher.on(engine);
+  }
+  
+  @Override
+  public Unreachable.Matcher instantiate() {
+    return Unreachable.Matcher.create();
+  }
+  
+  @Override
+  public Unreachable.Match newEmptyMatch() {
+    return Unreachable.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public Unreachable.Match newMatch(final Object... parameters) {
+    return Unreachable.Match.newMatch((modes3.Segment) parameters[0], (modes3.Segment) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link Unreachable} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link Unreachable#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final Unreachable INSTANCE = new Unreachable();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final Unreachable.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_S1 = new PParameter("S1", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_S2 = new PParameter("S2", "modes3.Segment", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.ece.mcgill.ca/wcet/modes3", "Segment")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_S1, parameter_S2);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "modes3.queries.unreachable";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("S1","S2");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_S1 = body.getOrCreateVariableByName("S1");
+          PVariable var_S2 = body.getOrCreateVariableByName("S2");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S1), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_S2), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.ece.mcgill.ca/wcet/modes3", "Segment")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_S1, parameter_S1),
+             new ExportedParameter(body, var_S2, parameter_S2)
+          ));
+          //    neg find reachable(S1, S2)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_S1, var_S2), Reachable.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "unreachable");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("S1"), 
+                              new ParameterReference("S2")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}