Program: 28971
Project: 28971
Buggy source:
@Test public void timeWindowBatchTest6() throws InterruptedException {
  log.info("String_Node_Str");
  SiddhiManager siddhiManager=new SiddhiManager();
  String streams="String_Node_Str" + "String_Node_Str" + "String_Node_Str";
  String query="String_Node_Str" + "String_Node_Str" + "String_Node_Str"+ "String_Node_Str"+ "String_Node_Str"+ "String_Node_Str";
  ExecutionPlanRuntime executionPlanRuntime=siddhiManager.createExecutionPlanRuntime(streams + query);
  try {
    executionPlanRuntime.addCallback("String_Node_Str",new QueryCallback(){
      @Override public void receive(      long timeStamp,      Event[] inEvents,      Event[] removeEvents){
        EventPrinter.print(timeStamp,inEvents,removeEvents);
        if (inEvents != null) {
          inEventCount+=(inEvents.length);
        }
        if (removeEvents != null) {
          removeEventCount+=(removeEvents.length);
        }
        eventArrived=true;
      }
    }
);
    InputHandler cseEventStreamHandler=executionPlanRuntime.getInputHandler("String_Node_Str");
    InputHandler twitterStreamHandler=executionPlanRuntime.getInputHandler("String_Node_Str");
    executionPlanRuntime.start();
    cseEventStreamHandler.send(new Object[]{"String_Node_Str",55.6f,100});
    twitterStreamHandler.send(new Object[]{"String_Node_Str","String_Node_Str","String_Node_Str"});
    cseEventStreamHandler.send(new Object[]{"String_Node_Str",75.6f,100});
    Thread.sleep(1500);
    cseEventStreamHandler.send(new Object[]{"String_Node_Str",57.6f,100});
    Thread.sleep(1000);
    Assert.assertEquals(2,inEventCount);
    Assert.assertEquals(0,removeEventCount);
    Assert.assertTrue(eventArrived);
  }
  finally {
    executionPlanRuntime.shutdown();
  }
}

Fixed version (ground truth):
@Test public void timeWindowBatchTest6() throws InterruptedException {
  log.info("String_Node_Str");
  SiddhiManager siddhiManager=new SiddhiManager();
  String streams="String_Node_Str" + "String_Node_Str" + "String_Node_Str";
  String query="String_Node_Str" + "String_Node_Str" + "String_Node_Str"+ "String_Node_Str"+ "String_Node_Str"+ "String_Node_Str";
  ExecutionPlanRuntime executionPlanRuntime=siddhiManager.createExecutionPlanRuntime(streams + query);
  try {
    executionPlanRuntime.addCallback("String_Node_Str",new QueryCallback(){
      @Override public void receive(      long timeStamp,      Event[] inEvents,      Event[] removeEvents){
        EventPrinter.print(timeStamp,inEvents,removeEvents);
        if (inEvents != null) {
          inEventCount+=(inEvents.length);
        }
        if (removeEvents != null) {
          removeEventCount+=(removeEvents.length);
        }
        eventArrived=true;
      }
    }
);
    InputHandler cseEventStreamHandler=executionPlanRuntime.getInputHandler("String_Node_Str");
    InputHandler twitterStreamHandler=executionPlanRuntime.getInputHandler("String_Node_Str");
    executionPlanRuntime.start();
    cseEventStreamHandler.send(new Object[]{"String_Node_Str",55.6f,100});
    twitterStreamHandler.send(new Object[]{"String_Node_Str","String_Node_Str","String_Node_Str"});
    cseEventStreamHandler.send(new Object[]{"String_Node_Str",75.6f,100});
    Thread.sleep(1500);
    cseEventStreamHandler.send(new Object[]{"String_Node_Str",57.6f,100});
    Thread.sleep(1000);
    Assert.assertTrue("String_Node_Str",inEventCount == 1 || inEventCount == 2);
    Assert.assertEquals(0,removeEventCount);
    Assert.assertTrue(eventArrived);
  }
  finally {
    executionPlanRuntime.shutdown();
  }
}