diff --git a/src/main/java/de/dhbwstuttgart/bytecode/TPHExtractor.java b/src/main/java/de/dhbwstuttgart/bytecode/TPHExtractor.java
index b26c4da3..b908afa6 100644
--- a/src/main/java/de/dhbwstuttgart/bytecode/TPHExtractor.java
+++ b/src/main/java/de/dhbwstuttgart/bytecode/TPHExtractor.java
@@ -10,6 +10,9 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
 
 import de.dhbwstuttgart.bytecode.constraint.ExtendsConstraint;
 import de.dhbwstuttgart.bytecode.constraint.TPHConstraint;
@@ -30,6 +33,9 @@ import de.dhbwstuttgart.syntaxtree.type.GenericRefType;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
 import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.typeinference.constraints.Constraint;
+import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
+import de.dhbwstuttgart.typeinference.constraints.Pair;
 import de.dhbwstuttgart.typeinference.result.GenericInsertPair;
 import de.dhbwstuttgart.typeinference.result.ResultPair;
 import de.dhbwstuttgart.typeinference.result.ResultSet;
@@ -185,7 +191,29 @@ public class TPHExtractor extends AbstractASTWalker {
 	public void visit(Method method) {
 		inMethod = true;
 		String id = MethodUtility.createID(resolver,method);
-		methodAndTph = new MethodAndTPH(id, method.getConstraints());
+		Predicate<Pair> filterUndConstraints =  cs -> ((cs.TA1 instanceof TypePlaceholder) && (cs.TA1 instanceof TypePlaceholder) &&
+				(resultSet.resolveType((TypePlaceholder)(cs.TA1)).resolvedType instanceof TypePlaceholder) &&
+				(resultSet.resolveType((TypePlaceholder)(cs.TA2)).resolvedType instanceof TypePlaceholder));
+		    
+		Function<ConstraintSet<Pair>, ConstraintSet<Pair>> filterConstrRemainingTVar =
+				csS -> { 
+					ConstraintSet<Pair> ret = new ConstraintSet<>();
+					ret.addAllUndConstraint(
+							csS.getUndConstraints()
+							   .stream().filter(filterUndConstraints)
+							   .collect(Collectors.toCollection(Constraint<Pair>::new)));
+					  
+					csS.getOderConstraints()
+					   .forEach(oConSSet -> { Set<Constraint<Pair>> setCons = new HashSet<>();
+					            oConSSet.forEach(OConS -> { setCons.add(
+					                             OConS.stream()
+					                                  .filter(filterUndConstraints)
+					                                  .collect(Collectors.toCollection(Constraint<Pair>::new)) ); 
+					                             } ); 
+					            ret.addOderConstraint(setCons);} );
+				return ret;
+				};
+		methodAndTph = new MethodAndTPH(id, filterConstrRemainingTVar.apply(method.getConstraints()));
 
 		inLocalOrParamOrReturn = true;
 		method.getReturnType().accept(this);
@@ -194,7 +222,7 @@ public class TPHExtractor extends AbstractASTWalker {
         
         if(method.block != null)
             method.block.accept(this);
-		
+		 
 		inMethod = false;
 		ListOfMethodsAndTph.add(methodAndTph);
 	}
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java b/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java
index 31a466dd..1c7b7439 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/constraints/ConstraintSet.java
@@ -23,9 +23,17 @@ public class ConstraintSet<A> {
         oderConstraints.add(methodConstraints);
     }
 
+    public void addAllUndConstraint(Constraint<A> allUndConstraints){
+        undConstraints.addAll(allUndConstraints);
+    }
+    
+    public void addAllOderConstraint(List<Set<Constraint<A>>> allOderConstraints){
+        this.oderConstraints.addAll(allOderConstraints);
+    }
+    
     public void addAll(ConstraintSet constraints) {
-        this.undConstraints.addAll(constraints.undConstraints);
-        this.oderConstraints.addAll(constraints.oderConstraints);
+        this.addAllUndConstraint(constraints.undConstraints);
+        this.addAllOderConstraint(constraints.oderConstraints);
     }
 
     @Override