Program: 158696
Project: 158696
Buggy source:
private void checkTrigger(TriggeredAbility ability,GameEvent event,Game game){
  MageObject object=game.getObject(ability.getSourceId());
  if (ability.isInUseableZone(game,object,event)) {
    if (event == null || !game.getContinuousEffects().preventedByRuleModification(event,ability,game,false)) {
      if (object != null) {
        boolean controllerSet=false;
        if (!ability.getZone().equals(Zone.COMMAND) && event != null && event.getTargetId() != null && event.getTargetId().equals(ability.getSourceId()) && (event.getType().equals(EventType.ZONE_CHANGE) || event.getType().equals(EventType.DESTROYED_PERMANENT) || event.getType().equals(EventType.SACRIFICED_PERMANENT))) {
          Permanent permanent=(Permanent)game.getLastKnownInformation(ability.getSourceId(),Zone.BATTLEFIELD,ability.getSourceObjectZoneChangeCounter() - 1);
          if (permanent != null) {
            if (!ability.getWorksFaceDown() && permanent.isFaceDown(game)) {
              return;
            }
            controllerSet=true;
            ability.setControllerId(permanent.getControllerId());
          }
        }
        if (!controllerSet) {
          if (object instanceof Permanent) {
            ability.setControllerId(((Permanent)object).getControllerId());
          }
 else           if (object instanceof Spell) {
            ability.setControllerId(((Spell)object).getControllerId());
          }
 else           if (object instanceof Card) {
            ability.setControllerId(((Card)object).getOwnerId());
          }
        }
      }
      if (ability.checkTrigger(event,game)) {
        ability.trigger(game,ability.getControllerId());
      }
    }
  }
}

Fixed version (ground truth):
private void checkTrigger(TriggeredAbility ability,GameEvent event,Game game){
  MageObject object=game.getObject(ability.getSourceId());
  if (ability.isInUseableZone(game,object,event)) {
    if (event == null || !game.getContinuousEffects().preventedByRuleModification(event,ability,game,false)) {
      if (object != null) {
        boolean controllerSet=false;
        if (!ability.getZone().equals(Zone.COMMAND) && event != null && event.getTargetId() != null && ((event.getType().equals(EventType.ZONE_CHANGE) && ((ZoneChangeEvent)event).getFromZone().equals(Zone.BATTLEFIELD)) || event.getType().equals(EventType.DESTROYED_PERMANENT) || event.getType().equals(EventType.SACRIFICED_PERMANENT)) && game.getLKI().get(Zone.BATTLEFIELD) != null && game.getLKI().get(Zone.BATTLEFIELD).containsKey(ability.getSourceId())) {
          Permanent permanent=(Permanent)game.getLastKnownInformation(ability.getSourceId(),Zone.BATTLEFIELD,ability.getSourceObjectZoneChangeCounter() - 1);
          if (permanent != null) {
            if (!ability.getWorksFaceDown() && permanent.isFaceDown(game)) {
              return;
            }
            controllerSet=true;
            ability.setControllerId(permanent.getControllerId());
          }
        }
        if (!controllerSet) {
          if (object instanceof Permanent) {
            ability.setControllerId(((Permanent)object).getControllerId());
          }
 else           if (object instanceof Spell) {
            ability.setControllerId(((Spell)object).getControllerId());
          }
 else           if (object instanceof Card) {
            ability.setControllerId(((Card)object).getOwnerId());
          }
        }
      }
      if (ability.checkTrigger(event,game)) {
        ability.trigger(game,ability.getControllerId());
      }
    }
  }
}