diff --git a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
index 6703dfa51..2778fd191 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/unify/TypeUnifyTask.java
@@ -947,9 +947,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					writeLog("a in " + variance + " "+ a);
 					writeLog("nextSetasListRest: " + nextSetasListRest.toString());
 				}
-				while (!nextSetasListRest.isEmpty()) {
-					Set<UnifyPair> nSaL = nextSetasListRest.remove(0);
-					synchronized (this) { nextSetasList.remove(nSaL);
+				while (!nextSetasList.isEmpty()) {
+					Set<UnifyPair> nSaL = nextSetasList.remove(0);
+					synchronized (this) { //nextSetasList.remove(nSaL);
 						writeLog("1 RM" + nSaL.toString());
 					}
 					
@@ -1049,9 +1049,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					writeLog("a in " + variance + " "+ a);
 					writeLog("nextSetasListRest: " + nextSetasListRest.toString());
 				}
-				while (!nextSetasListRest.isEmpty()) {
-					Set<UnifyPair> nSaL = nextSetasListRest.remove(0);
-					synchronized (this) { nextSetasList.remove(nSaL);
+				while (!nextSetasList.isEmpty()) {
+					Set<UnifyPair> nSaL = nextSetasList.remove(0);
+					synchronized (this) { //nextSetasList.remove(nSaL);
 						writeLog("-1 RM" + nSaL.toString());
 					}
 					
@@ -1151,9 +1151,9 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 					writeLog("a in " + variance + " "+ a);
 					writeLog("nextSetasListRest: " + nextSetasListRest.toString());
 				}
-		    	while (!nextSetasListRest.isEmpty()) {
-		    		Set<UnifyPair> nSaL = nextSetasListRest.remove(0);
-		    		nextSetasList.remove(nSaL); //PL einkommentiert 20-02-03
+		    	while (!nextSetasList.isEmpty()) {
+		    		Set<UnifyPair> nSaL = nextSetasList.remove(0);
+		    		//nextSetasList.remove(nSaL); //PL einkommentiert 20-02-03
 		    		Set<UnifyPair> newEq = new HashSet<>(eq);
 		    		Set<Set<UnifyPair>> newElems = new HashSet<>(elems);
 		    		List<Set<Constraint<UnifyPair>>> newOderConstraints = new ArrayList<>(oderConstraints);
@@ -2630,7 +2630,7 @@ public class TypeUnifyTask extends RecursiveTask<Set<Set<UnifyPair>>>  {
 		if (finalresult) {
 		synchronized ( this ) { 
 			try {
-				statistics.write(str + "\n");
+				statistics.write("Thread No. " + thNo + ": " + str + "\n");
 				statistics.flush();
 			
 			}