- Added a global attack id, starting at one. Currently only shown in

XML and Dot output. For Dot, it is included in the label. For XML, it
  is an added attribute of the 'attack' tag.

src/modelchecker.c

@@ -1239,6 +1239,7 @@ violateClaim (const System sys, int length, int claimev, Termlist reqt)
   flag = 1;
 
   /* Count the violations */
+  sys->attackid++;
   sys->failed = statesIncrease (sys->failed);
   clinfo = sys->traceEvent[claimev]->claiminfo;
   clinfo->failed = statesIncrease (clinfo->failed);	// note: for modelchecking secrecy, this can lead to more fails (at further events in branches of the tree) than claim encounters