diff --git a/prism/Makefile b/prism/Makefile
index 1fb0ebaa..9153bfcf 100644
--- a/prism/Makefile
+++ b/prism/Makefile
@@ -388,8 +388,8 @@ make_dirs:
 	fi
 
 tests: testslocal
-	@if [ -d ~/prism-tests ]; then \
-	  cd ~/prism-tests && $(PWD)/etc/scripts/prism-auto -t -m . -p $(PWD)/bin/prism; \
+	@if [ -d ~/prism/prism-tests ]; then \
+	  cd ~/prism/prism-tests && $(PWD)/etc/scripts/prism-auto -t -m . -p $(PWD)/bin/prism; \
 	else \
 	  echo "Skipping tests"; \
 	fi
diff --git a/prism/src/explicit/DTMCModelChecker.java b/prism/src/explicit/DTMCModelChecker.java
index bc94d1ca..f1620558 100644
--- a/prism/src/explicit/DTMCModelChecker.java
+++ b/prism/src/explicit/DTMCModelChecker.java
@@ -100,7 +100,7 @@ public class DTMCModelChecker extends ProbModelChecker
 
 		// Build product of Markov chain and automaton
 		mainLog.println("\nConstructing MC-DRA product...");
-		Pair<Model, int[]> pair = mcLtl.constructProductMC(dra, (DTMC) model, labelBS);
+		Pair<Model, int[]> pair = mcLtl.constructProductMC(dra, (DTMC) model, labelBS, statesOfInterest);
 		modelProduct = pair.first;
 		int invMap[] = pair.second;
 		mainLog.print("\n" + modelProduct.infoStringTable());
diff --git a/prism/src/explicit/LTLModelChecker.java b/prism/src/explicit/LTLModelChecker.java
index bb5f274c..57a8402d 100644
--- a/prism/src/explicit/LTLModelChecker.java
+++ b/prism/src/explicit/LTLModelChecker.java
@@ -36,6 +36,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Vector;
 
+import common.IterableStateSet;
+
 import parser.ast.Expression;
 import parser.ast.ExpressionBinaryOp;
 import parser.ast.ExpressionLabel;
@@ -130,9 +132,10 @@ public class LTLModelChecker extends PrismComponent
 	 * @param dra The DRA
 	 * @param dtmc The DTMC
 	 * @param labelBS BitSets giving the set of states for each AP in the DRA
+	 * @param statesOfInterest the set of states for which values should be calculated (null = all states)
 	 * @return The product DTMC and a list of each of its states (s,q), encoded as (s * draSize + q) 
 	 */
-	public Pair<Model, int[]> constructProductMC(DRA<BitSet> dra, DTMC dtmc, Vector<BitSet> labelBS) throws PrismException
+	public Pair<Model, int[]> constructProductMC(DRA<BitSet> dra, DTMC dtmc, Vector<BitSet> labelBS, BitSet statesOfInterest) throws PrismException
 	{
 		DTMCSimple prodModel = new DTMCSimple();
 
@@ -152,13 +155,13 @@ public class LTLModelChecker extends PrismComponent
 		int map[] = new int[prodNumStates];
 		Arrays.fill(map, -1);
 
-		// As we need results for all states of the original model,
-		// we explore states of the product starting from those that
-		// correspond to *all* states of the original model.
-		// These are designated as initial states of the model
+		// We need results for all states of the original model in statesOfInterest
+		// We thus explore states of the product starting from these states.
+		// These are designated as initial states of the product model
 		// (a) to ensure reachability is done for these states; and
-		// (b) to later identify the corresponding product state for each model state 
-		for (int s_0 = 0; s_0 < dtmc.getNumStates(); s_0++) {
+		// (b) to later identify the corresponding product state for the original states
+		//     of interest
+		for (int s_0 : new IterableStateSet(statesOfInterest, dtmc.getNumStates())) {
 			// Get BitSet representing APs (labels) satisfied by state s_0
 			for (int k = 0; k < numAPs; k++) {
 				s_labels.set(k, labelBS.get(Integer.parseInt(dra.getAPList().get(k).substring(1))).get(s_0));
@@ -220,9 +223,10 @@ public class LTLModelChecker extends PrismComponent
 	 * @param dra The DRA
 	 * @param mdp The MDP
 	 * @param labelBS BitSets giving the set of states for each AP in the DRA
+	 * @param statesOfInterest the set of states for which values should be calculated (null = all states)
 	 * @return The product MDP and a list of each of its states (s,q), encoded as (s * draSize + q) 
 	 */
-	public Pair<NondetModel, int[]> constructProductMDP(DRA<BitSet> dra, MDP mdp, Vector<BitSet> labelBS) throws PrismException
+	public Pair<NondetModel, int[]> constructProductMDP(DRA<BitSet> dra, MDP mdp, Vector<BitSet> labelBS, BitSet statesOfInterest) throws PrismException
 	{
 		MDPSimple prodModel = new MDPSimple();
 
@@ -242,13 +246,13 @@ public class LTLModelChecker extends PrismComponent
 		int map[] = new int[prodNumStates];
 		Arrays.fill(map, -1);
 
-		// As we need results for all states of the original model,
-		// we explore states of the product starting from those that
-		// correspond to *all* states of the original model.
-		// These are designated as initial states of the model
+		// We need results for all states of the original model in statesOfInterest
+		// We thus explore states of the product starting from these states.
+		// These are designated as initial states of the product model
 		// (a) to ensure reachability is done for these states; and
-		// (b) to later identify the corresponding product state for each model state 
-		for (int s_0 = 0; s_0 < mdp.getNumStates(); s_0++) {
+		// (b) to later identify the corresponding product state for the original states
+		//     of interest
+		for (int s_0 : new IterableStateSet(statesOfInterest, mdp.getNumStates())) {
 			// Get BitSet representing APs (labels) satisfied by state s_0
 			for (int k = 0; k < numAPs; k++) {
 				s_labels.set(k, labelBS.get(Integer.parseInt(dra.getAPList().get(k).substring(1))).get(s_0));
diff --git a/prism/src/explicit/MDPModelChecker.java b/prism/src/explicit/MDPModelChecker.java
index 1401f111..0b25d94e 100644
--- a/prism/src/explicit/MDPModelChecker.java
+++ b/prism/src/explicit/MDPModelChecker.java
@@ -108,7 +108,7 @@ public class MDPModelChecker extends ProbModelChecker
 
 		// Build product of MDP and automaton
 		mainLog.println("\nConstructing MDP-DRA product...");
-		Pair<NondetModel, int[]> pair = mcLtl.constructProductMDP(dra, (MDP) model, labelBS);
+		Pair<NondetModel, int[]> pair = mcLtl.constructProductMDP(dra, (MDP) model, labelBS, statesOfInterest);
 		modelProduct = pair.first;
 		int invMap[] = pair.second;