diff --git a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
index fc1b0000..c582fa96 100644
--- a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
+++ b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
@@ -69,7 +69,7 @@ public class JavaTXCompiler {
 
 	//public static JavaTXCompiler INSTANCE;
     final CompilationEnvironment environment;
-	Boolean resultmodel = true;
+	Boolean resultmodel = false;
     public final Map<File, SourceFile> sourceFiles = new HashMap<>();
     Boolean log = false; //gibt an ob ein Log-File nach System.getProperty("user.dir")+""/logFiles/"" geschrieben werden soll?
     public volatile UnifyTaskModel usedTasks = new UnifyTaskModel();
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java b/src/main/java/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
index 0f1017ed..92b72ec4 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
@@ -121,6 +121,7 @@ public class UnifyTypeFactory {
     	}
     	PlaceholderType ntph = new PlaceholderType(tph.getName());
     	ntph.setVariance(tph.getVariance());
+    	ntph.setOrCons(tph.getOrCons());
     	int in = PLACEHOLDERS.indexOf(ntph);
 		if (in == -1) {
 			PLACEHOLDERS.add(ntph);
diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/type/TypePlaceholder.java b/src/main/java/de/dhbwstuttgart/syntaxtree/type/TypePlaceholder.java
index 2aaa8068..8452b2c8 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/type/TypePlaceholder.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/type/TypePlaceholder.java
@@ -24,6 +24,14 @@ public class TypePlaceholder extends RefTypeOrTPHOrWildcardOrGeneric
 	 * wird im Generate Generics Teil nach der Rueckumwandlung nach dem Unify genutzt
 	 */
 	private int variance = 0;
+	
+	/*
+     * Fuer Oder-Constraints:
+     * orCons = 1: Receiver
+     * orCons = 0: Argument oder kein Oder-Constraint 
+     * orCons = -1: RetType
+     */
+    private byte orCons = 0;
 
 
     /**
@@ -104,4 +112,12 @@ public class TypePlaceholder extends RefTypeOrTPHOrWildcardOrGeneric
     public void accept(ResultSetVisitor visitor) {
         visitor.visit(this);
     }
+
+    public void setOrCons(byte i) {
+		orCons = i;
+	}
+
+	public byte getOrCons() {
+		return orCons;
+	}
 }
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
index ecd7600f..acdce189 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
@@ -613,6 +613,11 @@ public class TYPEStmt implements StatementVisitor{
         methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.SMALLERDOT));
         extendsMethodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.SMALLERDOT));
         
+        //methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
+        //extendsMethodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
+        
+        ((TypePlaceholder)forMethod.getType()).setOrCons((byte)-1);//fuer Maximums-Bestimmung
+        
         Set<Pair> parameterContraints = generateParameterConstraints(forMethod, assumption, info, resolver);
         
         methodConstraint.addAll(parameterContraints);
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java
index 35eee0eb..7e319a42 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/OrderingUnifyPair.java
@@ -131,7 +131,11 @@ public class OrderingUnifyPair extends OrderingExtend<Set<UnifyPair>> {
 	 * fuehrt zu Fehlern bei Arrays.sort (contract nicht erfuellt)
 	 * @see com.google.common.collect.Ordering#compare(java.lang.Object, java.lang.Object)
 	 */
-	public int compare (Set<UnifyPair> left, Set<UnifyPair> right) {
+	public int compare (Set<UnifyPair> leftpara, Set<UnifyPair> rightpara) {
+		
+		Set<UnifyPair> left = new HashSet<>(leftpara);
+		Set<UnifyPair> right = new HashSet<>(rightpara);
+		
 		/*
 		//pairop = PairOperator.SMALLERDOTWC;
 		List<UnifyType> al = new ArrayList<>();
@@ -220,22 +224,26 @@ public class OrderingUnifyPair extends OrderingExtend<Set<UnifyPair>> {
 	            		   !(y.getRhsType() instanceof PlaceholderType) && 
 	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
 				.collect(Collectors.toCollection(HashSet::new));
+		left.removeAll(lefteqOder);
 		Set<UnifyPair> righteqOder = right.stream()
 				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
 	               return (y.getLhsType() instanceof PlaceholderType && 
 	            		   !(y.getRhsType() instanceof PlaceholderType) && 
 	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
 				.collect(Collectors.toCollection(HashSet::new));
+		right.removeAll(righteqOder);
 		Set<UnifyPair> lefteqRet = left.stream()
 				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
 	               return (y.getRhsType() instanceof PlaceholderType && 
-	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
+	            		   ((PlaceholderType)y.getRhsType()).getOrCons() == (byte)-1);})
 				.collect(Collectors.toCollection(HashSet::new));
+		left.removeAll(lefteqRet);
 		Set<UnifyPair> righteqRet = right.stream()
 				.filter(x -> { UnifyPair y = x.getGroundBasePair(); 
 	               return (y.getRhsType() instanceof PlaceholderType && 
-	            		   x.getPairOp() == PairOperator.EQUALSDOT);})
+	            		   ((PlaceholderType)y.getRhsType()).getOrCons() == (byte)-1);})
 				.collect(Collectors.toCollection(HashSet::new));
+		right.removeAll(righteqRet);
 		Set<UnifyPair> leftleOder = left.stream()
 				.filter(x -> (x.getPairOp() == PairOperator.SMALLERDOT))
 				.collect(Collectors.toCollection(HashSet::new));
diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/PlaceholderType.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/PlaceholderType.java
index 63f3d448..07d85727 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/model/PlaceholderType.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/model/PlaceholderType.java
@@ -59,6 +59,14 @@ public final class PlaceholderType extends UnifyType{
      * PL 2018-03-21
      */
     private int variance = 0;
+    
+    /*
+     * Fuer Oder-Constraints:
+     * orCons = 1: Receiver
+     * orCons = 0: Argument oder kein Oder-Constraint 
+     * orCons = -1: RetType
+     */
+    private byte orCons = 0;
 	
 	/**
 	 * Creates a new placeholder type with the specified name.
@@ -122,6 +130,14 @@ public final class PlaceholderType extends UnifyType{
 		}}
 	}
 	
+	public void setOrCons(byte i) {
+		orCons = i;
+	}
+	
+	public byte getOrCons() {
+		return orCons;
+	}
+	
 	public Boolean isWildcardable() {
 		return wildcardable;
 	}