Fix some minor bugs in integration fitness function

Author: pderakhshanfar

botsing-commons/src/main/java/eu/stamp/botsing/commons/graphs/cfg/BotsingRawControlFlowGraph.java

@@ -59,7 +59,7 @@ public void addInterProceduralEdge(BytecodeInstruction src, BytecodeInstruction
             }
         }
         if(!alreadyRedirected){
-            throw new IllegalArgumentException("method "+target.getMethodName()+" does not have any exit point");
+            LOG.warn("method "+target.getMethodName()+" does not have any exit point");
         }
         this.addEdge(src, target, false);
     }

botsing-reproduction/src/main/java/eu/stamp/botsing/fitnessfunction/IntegrationTestingFF.java

@@ -71,7 +71,7 @@ protected double exceptionCoverage(ExecutionResult executionResult) {
                 continue;
             }
 
-            int crashingLine = resultException.getStackTrace()[0].getLineNumber();
+            int crashingLine = resultException.getStackTrace()[frame].getLineNumber();
             if(targetCrash.getFrame(1).getLineNumber() != crashingLine || !targetCrash.getFrame(1).getClassName().equals(crashingClass)){
                 continue;
             }