swap order of ErrorStats.of call in SimulationAccuracyEvaluator

bundles/fr.irisa.cairn.gecos.typeexploration/src/fr/irisa/cairn/gecos/typeexploration/accuracy/SimulationAccuracyEvaluator.java

@@ -223,7 +223,7 @@ public class SimulationAccuracyEvaluator implements IAccuracyEvaluator {
 					if(refSnap.length != curSnap.length)
 						throw new RuntimeException("Number of values in snapshot " + i + " differ between current and "
 								+ "reference implemetation: " +refSnap.length + " vs " + curSnap.length);
-					return ErrorStats.ofDiff(curSnap, refSnap);
+					return ErrorStats.ofDiff(refSnap, curSnap);
 				}).collect(toList());
 				
 				snapshotErrorStatsMap.put(sym, snapshotErrorStats);