Use the system class for this stuff, lot faster.
--- gov/nasa/jpf/search/heuristic/Interleaving.java (revision 210)
+++ gov/nasa/jpf/search/heuristic/Interleaving.java (working copy)
@@ -65,9 +65,7 @@
int[] newThreads = new int[newSize];
newThreads[0] = lastRun;
- for (int i = 1; i < newSize; i++) {
- newThreads[i] = threads[i - 1];
- }
+ System.arraycopy(threads, 0, newThreads, 1, newSize - 1);
search.getNew().otherData = newThreads;