Program: 87364
Project: 87364
Buggy source:
/** 
 * Sets a new deadline and schedules the timers to fire accordingly.
 * @param deadline the deadline.
 */
public void setDeadline(Date deadline){
  timer24hour.cancel();
  timer1hour.cancel();
  timer0hour.cancel();
  if (deadline != null) {
    final Date aDayBeforeTheDeadline=new Date(deadline.getTime());
    aDayBeforeTheDeadline.setHours(aDayBeforeTheDeadline.getHours() - 24);
    final Date anHourBeforeTheDeadline=new Date(deadline.getTime());
    anHourBeforeTheDeadline.setHours(anHourBeforeTheDeadline.getHours() - 1);
    final Date now=new Date();
    if (now.before(deadline)) {
      if (now.before(aDayBeforeTheDeadline)) {
        timer24hour.cancel();
        long diff=aDayBeforeTheDeadline.getTime() - now.getTime();
        final long diffHours=diff / (1000 * 60 * 60);
        LOG.info("String_Node_Str" + diffHours + "String_Node_Str");
        if (diffHours < 24 * 3) {
          try {
            timer24hour.schedule((int)diff + (60 * 1000));
          }
 catch (          Exception exception) {
            LOG.log(Level.FINER,"String_Node_Str" + exception.getMessage(),exception);
          }
        }
      }
      if (now.before(anHourBeforeTheDeadline)) {
        timer1hour.cancel();
        long diff=anHourBeforeTheDeadline.getTime() - now.getTime();
        final long diffMinutes=diff / (1000 * 60);
        LOG.info("String_Node_Str" + diffMinutes + "String_Node_Str");
        if (diffMinutes < 3 * 24 * 60) {
          try {
            timer1hour.schedule((int)diff + (60 * 1000));
          }
 catch (          Exception exception) {
            LOG.log(Level.FINER,"String_Node_Str" + exception.getMessage(),exception);
          }
        }
      }
      timer0hour.cancel();
      long diff=deadline.getTime() - now.getTime();
      final long diffMinutes=diff / (1000 * 60);
      LOG.info("String_Node_Str" + diffMinutes + "String_Node_Str");
      if (diffMinutes < 3 * 24 * 60) {
        try {
          timer0hour.schedule((int)diff + (60 * 1000));
        }
 catch (        Exception exception) {
          LOG.log(Level.FINER,"String_Node_Str" + exception.getMessage(),exception);
        }
      }
    }
    if (now.before(deadline)) {
      if (now.after(anHourBeforeTheDeadline)) {
        timer1hour.run();
      }
 else       if (now.after(aDayBeforeTheDeadline)) {
        timer24hour.run();
      }
    }
 else {
      timer0hour.run();
    }
  }
}

Fixed version (ground truth):
/** 
 * Sets a new deadline and schedules the timers to fire accordingly.
 * @param deadline the deadline.
 */
public void setDeadline(Date deadline){
  timer24hour.cancel();
  timer1hour.cancel();
  timer0hour.cancel();
  if (deadline != null) {
    final Date aDayBeforeTheDeadline=new Date(deadline.getTime());
    aDayBeforeTheDeadline.setHours(aDayBeforeTheDeadline.getHours() - 24);
    final Date anHourBeforeTheDeadline=new Date(deadline.getTime());
    anHourBeforeTheDeadline.setHours(anHourBeforeTheDeadline.getHours() - 1);
    final Date now=getNow();
    if (now.before(deadline)) {
      if (now.before(aDayBeforeTheDeadline)) {
        timer24hour.cancel();
        long diff=aDayBeforeTheDeadline.getTime() - now.getTime();
        final long diffHours=diff / (1000 * 60 * 60);
        LOG.info("String_Node_Str" + diffHours + "String_Node_Str");
        if (diffHours < 24 * 3) {
          try {
            timer24hour.schedule((int)diff + (60 * 1000));
          }
 catch (          Exception exception) {
            LOG.log(Level.FINER,"String_Node_Str" + exception.getMessage(),exception);
          }
        }
      }
      if (now.before(anHourBeforeTheDeadline)) {
        timer1hour.cancel();
        long diff=anHourBeforeTheDeadline.getTime() - now.getTime();
        final long diffMinutes=diff / (1000 * 60);
        LOG.info("String_Node_Str" + diffMinutes + "String_Node_Str");
        if (diffMinutes < 3 * 24 * 60) {
          try {
            timer1hour.schedule((int)diff + (60 * 1000));
          }
 catch (          Exception exception) {
            LOG.log(Level.FINER,"String_Node_Str" + exception.getMessage(),exception);
          }
        }
      }
      timer0hour.cancel();
      long diff=deadline.getTime() - now.getTime();
      final long diffMinutes=diff / (1000 * 60);
      LOG.info("String_Node_Str" + diffMinutes + "String_Node_Str");
      if (diffMinutes < 3 * 24 * 60) {
        try {
          timer0hour.schedule((int)diff + (60 * 1000));
        }
 catch (        Exception exception) {
          LOG.log(Level.FINER,"String_Node_Str" + exception.getMessage(),exception);
        }
      }
    }
    if (now.before(deadline)) {
      if (now.after(aDayBeforeTheDeadline)) {
        timer24hour.run();
      }
 else       if (now.after(anHourBeforeTheDeadline)) {
        timer1hour.run();
      }
    }
 else {
      timer0hour.run();
    }
  }
}