diff --git a/prism/src/explicit/SubNondetModel.java b/prism/src/explicit/SubNondetModel.java
index 409b1046..be084a78 100644
--- a/prism/src/explicit/SubNondetModel.java
+++ b/prism/src/explicit/SubNondetModel.java
@@ -352,10 +352,10 @@ public class SubNondetModel implements NondetModel
 	@Override
 	public Object getAction(int s, int i)
 	{
-		s = translateState(s);
-		i = translateAction(s, i);
+		int sOriginal = translateState(s);
+		int iOriginal = translateAction(s, i);
 
-		return model.getAction(s, i);
+		return model.getAction(sOriginal, iOriginal);
 	}
 
 	@Override
@@ -367,38 +367,38 @@ public class SubNondetModel implements NondetModel
 	@Override
 	public int getNumTransitions(int s, int i)
 	{
-		s = translateState(s);
-		i = translateAction(s, i);
-		return model.getNumTransitions(s, i);
+		int sOriginal = translateState(s);
+		int iOriginal = translateAction(s, i);
+		return model.getNumTransitions(sOriginal, iOriginal);
 	}
 	
 	@Override
 	public boolean allSuccessorsInSet(int s, int i, BitSet set)
 	{
-		s = translateState(s);
-		i = translateAction(s, i);
+		int sOriginal = translateState(s);
+		int iOriginal = translateAction(s, i);
 		set = translateSet(set);
 
-		return model.allSuccessorsInSet(s, i, set);
+		return model.allSuccessorsInSet(sOriginal, iOriginal, set);
 	}
 
 	@Override
 	public boolean someSuccessorsInSet(int s, int i, BitSet set)
 	{
-		s = translateState(s);
-		i = translateAction(s, i);
+		int sOriginal = translateState(s);
+		int iOriginal = translateAction(s, i);
 		set = translateSet(set);
 
-		return model.someSuccessorsInSet(s, i, set);
+		return model.someSuccessorsInSet(sOriginal, iOriginal, set);
 	}
 
 	@Override
 	public Iterator<Integer> getSuccessorsIterator(int s, int i)
 	{
-		s = translateState(s);
-		i = translateAction(s, i);
+		int sOriginal = translateState(s);
+		int iOriginal = translateAction(s, i);
 		List<Integer> succ = new ArrayList<Integer>();
-		Iterator<Integer> it = model.getSuccessorsIterator(s, i);
+		Iterator<Integer> it = model.getSuccessorsIterator(sOriginal, iOriginal);
 		while (it.hasNext()) {
 			int j = it.next();
 			succ.add(inverseTranslateState(j));