Program: 76280
Project: 76280
Buggy source:
/** 
 * Executes the code in this actor. This actor randomly chooses whether to grab the chopstick to the left or right of it first. When it has one chopstick, it then tries to grab the other chopstick beside it. This process mimics the eating action of the philosopher twenty times, and then finishes normally.
 * @exception IllegalActionException If an error occurs duringexecuting the process.
 */
public void fire() throws IllegalActionException {
  Random rand=new Random();
  Token t=new IntToken(0);
  double interval=0.0;
  double rate=1;
  int count=0;
  try {
    while (count < 20) {
      rate=((DoubleToken)_thinking.getToken()).doubleValue();
      interval=(int)(rand.nextDouble() * rate * 1000);
      interval=interval / 1000;
      System.out.println(getName() + count + "String_Node_Str"+ interval);
      Thread th=Thread.currentThread();
      th.sleep((long)interval * 1000);
      delay(interval);
      if (rand.nextDouble() > 0.5) {
        leftIn.get(0);
        gotLeft=true;
        _notifyListeners();
        waitingRight=true;
        rightIn.get(0);
        gotRight=true;
        waitingRight=false;
        _notifyListeners();
      }
 else {
        rightIn.get(0);
        gotRight=true;
        _notifyListeners();
        waitingLeft=true;
        leftIn.get(0);
        gotLeft=true;
        waitingLeft=false;
        _notifyListeners();
      }
      rate=((DoubleToken)_eating.getToken()).doubleValue();
      interval=(int)(rand.nextDouble() * rate * 2000);
      interval=interval / 1000;
      System.out.println(getName() + "String_Node_Str" + interval);
      th.sleep((long)interval * 1000);
      delay(interval);
      leftOut.send(0,t);
      gotLeft=false;
      rightOut.send(0,t);
      gotRight=false;
      _notifyListeners();
      count++;
    }
    return;
  }
 catch (  NoTokenException ex) {
    throw new IllegalActionException(getName() + "String_Node_Str" + "String_Node_Str");
  }
catch (  InterruptedException ex) {
    throw new IllegalActionException(getName() + "String_Node_Str" + "String_Node_Str");
  }
}

Fixed version (ground truth):
/** 
 * Executes the code in this actor. This actor randomly chooses whether to grab the chopstick to the left or right of it first. When it has one chopstick, it then tries to grab the other chopstick beside it. This process mimics the eating action of the philosopher twenty times, and then finishes normally.
 * @exception IllegalActionException If an error occurs duringexecuting the process.
 */
public void fire() throws IllegalActionException {
  Random rand=new Random();
  Token t=new IntToken(0);
  double interval=0.0;
  double rate=1;
  int count=0;
  try {
    while (count < 20) {
      rate=((DoubleToken)thinking.getToken()).doubleValue();
      interval=(int)(rand.nextDouble() * rate * 1000);
      interval=interval / 1000;
      System.out.println(getName() + count + "String_Node_Str"+ interval);
      Thread th=Thread.currentThread();
      th.sleep((long)interval * 1000);
      delay(interval);
      if (rand.nextDouble() > 0.5) {
        leftIn.get(0);
        gotLeft=true;
        _notifyListeners();
        waitingRight=true;
        rightIn.get(0);
        gotRight=true;
        waitingRight=false;
        _notifyListeners();
      }
 else {
        rightIn.get(0);
        gotRight=true;
        _notifyListeners();
        waitingLeft=true;
        leftIn.get(0);
        gotLeft=true;
        waitingLeft=false;
        _notifyListeners();
      }
      rate=((DoubleToken)eating.getToken()).doubleValue();
      interval=(int)(rand.nextDouble() * rate * 2000);
      interval=interval / 1000;
      System.out.println(getName() + "String_Node_Str" + interval);
      th.sleep((long)interval * 1000);
      delay(interval);
      leftOut.send(0,t);
      gotLeft=false;
      rightOut.send(0,t);
      gotRight=false;
      _notifyListeners();
      count++;
    }
    return;
  }
 catch (  NoTokenException ex) {
    throw new IllegalActionException(getName() + "String_Node_Str" + "String_Node_Str");
  }
catch (  InterruptedException ex) {
    throw new IllegalActionException(getName() + "String_Node_Str" + "String_Node_Str");
  }
}