diff --git a/prism/src/explicit/STPGAbstrSimple.java b/prism/src/explicit/STPGAbstrSimple.java
index 6b0fcadb..9992a6d3 100644
--- a/prism/src/explicit/STPGAbstrSimple.java
+++ b/prism/src/explicit/STPGAbstrSimple.java
@@ -818,7 +818,7 @@ public class STPGAbstrSimple extends ModelSimple implements STPG
 					minmax2 = d;
 				first2 = false;
 			}
-			minmax2 += rewards.getNestedTransitionReward(s, dsIter);
+			minmax2 += rewards.getTransitionReward(s, dsIter);
 			// Check whether we have exceeded min/max so far
 			if (first1 || (min1 && minmax2 < minmax1) || (!min1 && minmax2 > minmax1))
 				minmax1 = minmax2;
@@ -861,7 +861,7 @@ public class STPGAbstrSimple extends ModelSimple implements STPG
 					minmax2 = d;
 				first2 = false;
 			}
-			minmax2 += rewards.getNestedTransitionReward(s, dsIter);
+			minmax2 += rewards.getTransitionReward(s, dsIter);
 			// Store strategy info if value matches
 			//if (PrismUtils.doublesAreClose(val, d, termCritParam, termCrit == TermCrit.ABSOLUTE)) {
 			if (PrismUtils.doublesAreClose(val, minmax2, 1e-12, false)) {
diff --git a/prism/src/explicit/rewards/STPGRewards.java b/prism/src/explicit/rewards/STPGRewards.java
index bd5e2b9c..8a06797d 100644
--- a/prism/src/explicit/rewards/STPGRewards.java
+++ b/prism/src/explicit/rewards/STPGRewards.java
@@ -44,11 +44,6 @@ public interface STPGRewards extends Rewards
 	 */
 	public abstract double getTransitionReward(int s, int i); 
 	
-	/**
-	 * Get the transition reward for the {@code i}th nested choice from state {@code s}.
-	 */
-	public abstract double getNestedTransitionReward(int s, int i);
-	
 	/**
 	 * Get the transition reward for the {@code i,j}th nested choice from state {@code s}.
 	 */
diff --git a/prism/src/explicit/rewards/STPGRewardsSimple.java b/prism/src/explicit/rewards/STPGRewardsSimple.java
index 008f00ca..9475475f 100644
--- a/prism/src/explicit/rewards/STPGRewardsSimple.java
+++ b/prism/src/explicit/rewards/STPGRewardsSimple.java
@@ -32,10 +32,8 @@ import java.util.List;
 
 public class STPGRewardsSimple extends MDPRewardsSimple implements STPGRewards
 {
-	/** Nested transition rewards (level 1) */
-	protected List<List<Double>> nestedTransRewards1;
-	/** Nested transition rewards (level 2) */
-	protected List<List<List<Double>>> nestedTransRewards2;
+	/** Nested transition rewards */
+	protected List<List<List<Double>>> nestedTransRewards;
 
 	/**
 	 * Constructor: all zero rewards.
@@ -44,45 +42,11 @@ public class STPGRewardsSimple extends MDPRewardsSimple implements STPGRewards
 	public STPGRewardsSimple(int numStates)
 	{
 		super(numStates);
-		// Initially lists are just null (denoting all 0)
-		nestedTransRewards1 = null;
-		nestedTransRewards2 = null;
+		// Initially list is just null (denoting all 0)
+		nestedTransRewards = null;
 	}
 	
 	// Mutators
-	
-	/**
-	 * Set the reward for the {@code i}th nested transition of state {@code s} to {@code r}.
-	 */
-	public void setNestedTransitionReward(int s, int i, double r)
-	{
-		List<Double> list;
-		// Nothing to do for zero reward
-		if (r == 0.0)
-			return;
-		// If no rewards array created yet, create it
-		if (nestedTransRewards1 == null) {
-			nestedTransRewards1 = new ArrayList<List<Double>>(numStates);
-			for (int j = 0; j < numStates; j++)
-				nestedTransRewards1.add(null);
-		}
-		// If no rewards for state s yet, create list
-		if (nestedTransRewards1.get(s) == null) {
-			list = new ArrayList<Double>();
-			nestedTransRewards1.set(s, list);
-		} else {
-			list = nestedTransRewards1.get(s);
-		}
-		// If list not big enough, extend
-		int n = i - list.size() + 1;
-		if (n > 0) {
-			for (int j = 0; j < n; j++) {
-				list.add(0.0);
-			}
-		}
-		// Set reward
-		list.set(i, r);
-	}
 
 	/**
 	 * Set the reward for the {@code i},{@code j}th nested transition of state {@code s} to {@code r}.
@@ -95,17 +59,17 @@ public class STPGRewardsSimple extends MDPRewardsSimple implements STPGRewards
 		if (r == 0.0)
 			return;
 		// If no rewards array created yet, create it
-		if (nestedTransRewards2 == null) {
-			nestedTransRewards2 = new ArrayList<List<List<Double>>>(numStates);
+		if (nestedTransRewards == null) {
+			nestedTransRewards = new ArrayList<List<List<Double>>>(numStates);
 			for (int k = 0; k < numStates; k++)
-				nestedTransRewards2.add(null);
+				nestedTransRewards.add(null);
 		}
 		// If no rewards for state s yet, create list1
-		if (nestedTransRewards2.get(s) == null) {
+		if (nestedTransRewards.get(s) == null) {
 			list1 = new ArrayList<List<Double>>();
-			nestedTransRewards2.set(s, list1);
+			nestedTransRewards.set(s, list1);
 		} else {
-			list1 = nestedTransRewards2.get(s);
+			list1 = nestedTransRewards.get(s);
 		}
 		// If list1 not big enough, extend
 		int n1 = i - list1.size() + 1;
@@ -138,33 +102,19 @@ public class STPGRewardsSimple extends MDPRewardsSimple implements STPGRewards
 	public void clearRewards(int s)
 	{
 		super.clearRewards(s);
-		if (nestedTransRewards1 != null && nestedTransRewards1.size() > s) {
-			nestedTransRewards1.set(s, null);
-		}
-		if (nestedTransRewards2 != null && nestedTransRewards2.size() > s) {
-			nestedTransRewards2.set(s, null);
+		if (nestedTransRewards != null && nestedTransRewards.size() > s) {
+			nestedTransRewards.set(s, null);
 		}
 	}
 	
 	// Accessors
 	
-	@Override
-	public double getNestedTransitionReward(int s, int i)
-	{
-		List<Double> list;
-		if (nestedTransRewards1 == null || (list = nestedTransRewards1.get(s)) == null)
-			return 0.0;
-		if (list.size() <= i)
-			return 0.0;
-		return list.get(i);
-	}
-	
 	@Override
 	public double getNestedTransitionReward(int s, int i, int j)
 	{
 		List<List<Double>> list1;
 		List<Double> list2;
-		if (nestedTransRewards2 == null || (list1 = nestedTransRewards2.get(s)) == null)
+		if (nestedTransRewards == null || (list1 = nestedTransRewards.get(s)) == null)
 			return 0.0;
 		if (list1.size() <= i || (list2 = list1.get(i)) == null)
 			return 0.0;
@@ -176,6 +126,6 @@ public class STPGRewardsSimple extends MDPRewardsSimple implements STPGRewards
 	@Override
 	public String toString()
 	{
-		return super.toString() + "; ntr1: " + nestedTransRewards1 + "; ntr2:" + nestedTransRewards2;
+		return super.toString() + "; ntr:" + nestedTransRewards;
 	}
 }