Program: 157800
Project: 157800
Buggy source:
@Override public boolean priority(Game game){
  passed=false;
  if (!abort) {
    HumanPlayer controllingPlayer=this;
    if (isGameUnderControl()) {
      Player player=game.getPlayer(getTurnControlledBy());
      if (player instanceof HumanPlayer) {
        controllingPlayer=(HumanPlayer)player;
      }
    }
    if (getJustActivatedType() != null && !holdingPriority) {
      if (controllingPlayer.getUserData().isPassPriorityCast() && getJustActivatedType() == AbilityType.SPELL) {
        setJustActivatedType(null);
        pass(game);
        return false;
      }
      if (controllingPlayer.getUserData().isPassPriorityActivation() && getJustActivatedType() == AbilityType.ACTIVATED) {
        setJustActivatedType(null);
        pass(game);
        return false;
      }
    }
    if (isGameUnderControl()) {
      if (passedAllTurns || passedTurnSkipStack) {
        if (passWithManaPoolCheck(game)) {
          return false;
        }
      }
      if (passedUntilEndStepBeforeMyTurn) {
        if (game.getTurn().getStepType() != PhaseStep.END_TURN) {
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
 else {
          PlayerList playerList=game.getState().getPlayerList(playerId);
          if (!playerList.getPrevious().equals(game.getActivePlayerId())) {
            if (passWithManaPoolCheck(game)) {
              return false;
            }
          }
        }
      }
      if (game.getStack().isEmpty()) {
        passedUntilStackResolved=false;
        boolean dontCheckPassStep=false;
        if (passedTurn || passedTurnSkipStack) {
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
        if (passedUntilNextMain) {
          if (game.getTurn().getStepType() == PhaseStep.POSTCOMBAT_MAIN || game.getTurn().getStepType() == PhaseStep.PRECOMBAT_MAIN) {
            if (!skippedAtLeastOnce || (!playerId.equals(game.getActivePlayerId()) && !controllingPlayer.getUserData().getUserSkipPrioritySteps().isStopOnAllMainPhases())) {
              skippedAtLeastOnce=true;
              if (passWithManaPoolCheck(game)) {
                return false;
              }
            }
 else {
              dontCheckPassStep=true;
              passedUntilNextMain=false;
            }
          }
 else {
            skippedAtLeastOnce=true;
            if (passWithManaPoolCheck(game)) {
              return false;
            }
          }
        }
        if (passedUntilEndOfTurn) {
          if (game.getTurn().getStepType() == PhaseStep.END_TURN) {
            if (!skippedAtLeastOnce || (playerId.equals(game.getActivePlayerId()) && !controllingPlayer.getUserData().getUserSkipPrioritySteps().isStopOnAllEndPhases())) {
              skippedAtLeastOnce=true;
              if (passWithManaPoolCheck(game)) {
                return false;
              }
            }
 else {
              dontCheckPassStep=true;
              passedUntilEndOfTurn=false;
            }
          }
 else {
            skippedAtLeastOnce=true;
            if (passWithManaPoolCheck(game)) {
              return false;
            }
          }
        }
        if (!dontCheckPassStep && checkPassStep(game,controllingPlayer)) {
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
      }
 else       if (passedUntilStackResolved) {
        if (dateLastAddedToStack == game.getStack().getDateLastAdded()) {
          dateLastAddedToStack=game.getStack().getDateLastAdded();
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
 else {
          passedUntilStackResolved=false;
        }
      }
    }
    while (canRespond()) {
      updateGameStatePriority("String_Node_Str",game);
      holdingPriority=false;
      if (!isExecutingMacro()) {
        game.firePriorityEvent(playerId);
      }
      waitForResponse(game);
      if (game.executingRollback()) {
        return true;
      }
      if (response.getBoolean() != null || response.getInteger() != null) {
        if (passWithManaPoolCheck(game) && !activatingMacro) {
          return false;
        }
 else {
          if (activatingMacro) {
synchronized (actionQueue) {
              actionQueue.notifyAll();
            }
          }
          continue;
        }
      }
      break;
    }
    if (response.getString() != null && response.getString().equals("String_Node_Str")) {
      specialAction(game);
    }
 else     if (response.getUUID() != null) {
      boolean result=false;
      MageObject object=game.getObject(response.getUUID());
      if (object != null) {
        Zone zone=game.getState().getZone(object.getId());
        if (zone != null) {
          if (object instanceof Card && ((Card)object).isFaceDown(game) && lookAtFaceDownCard((Card)object,game)) {
            result=true;
          }
 else {
            Player actingPlayer=null;
            if (playerId.equals(game.getPriorityPlayerId())) {
              actingPlayer=this;
            }
 else             if (getPlayersUnderYourControl().contains(game.getPriorityPlayerId())) {
              actingPlayer=game.getPlayer(game.getPriorityPlayerId());
            }
            if (actingPlayer != null) {
              LinkedHashMap<UUID,ActivatedAbility> useableAbilities=actingPlayer.getUseableActivatedAbilities(object,zone,game);
              if (useableAbilities != null && !useableAbilities.isEmpty()) {
                activateAbility(useableAbilities,object,game);
                result=true;
              }
            }
          }
        }
      }
      return result;
    }
 else     if (response.getManaType() != null) {
      return false;
    }
    return true;
  }
  return false;
}

Fixed version (ground truth):
@Override public boolean priority(Game game){
  passed=false;
  if (!abort) {
    HumanPlayer controllingPlayer=this;
    if (isGameUnderControl()) {
      Player player=game.getPlayer(getTurnControlledBy());
      if (player instanceof HumanPlayer) {
        controllingPlayer=(HumanPlayer)player;
      }
    }
    if (getJustActivatedType() != null && !holdingPriority) {
      if (controllingPlayer.getUserData().isPassPriorityCast() && getJustActivatedType() == AbilityType.SPELL) {
        setJustActivatedType(null);
        pass(game);
        return false;
      }
      if (controllingPlayer.getUserData().isPassPriorityActivation() && getJustActivatedType() == AbilityType.ACTIVATED) {
        setJustActivatedType(null);
        pass(game);
        return false;
      }
    }
    if (isGameUnderControl()) {
      if (passedAllTurns || passedTurnSkipStack) {
        if (passWithManaPoolCheck(game)) {
          return false;
        }
      }
      if (passedUntilEndStepBeforeMyTurn) {
        if (game.getTurn().getStepType() != PhaseStep.END_TURN) {
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
 else {
          PlayerList playerList=game.getState().getPlayerList(playerId);
          if (!playerList.getPrevious().equals(game.getActivePlayerId())) {
            if (passWithManaPoolCheck(game)) {
              return false;
            }
          }
        }
      }
      if (game.getStack().isEmpty()) {
        passedUntilStackResolved=false;
        boolean dontCheckPassStep=false;
        if (passedTurn || passedTurnSkipStack) {
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
        if (passedUntilNextMain) {
          if (game.getTurn().getStepType() == PhaseStep.POSTCOMBAT_MAIN || game.getTurn().getStepType() == PhaseStep.PRECOMBAT_MAIN) {
            if (!skippedAtLeastOnce || (!playerId.equals(game.getActivePlayerId()) && !controllingPlayer.getUserData().getUserSkipPrioritySteps().isStopOnAllMainPhases())) {
              skippedAtLeastOnce=true;
              if (passWithManaPoolCheck(game)) {
                return false;
              }
            }
 else {
              dontCheckPassStep=true;
              passedUntilNextMain=false;
            }
          }
 else {
            skippedAtLeastOnce=true;
            if (passWithManaPoolCheck(game)) {
              return false;
            }
          }
        }
        if (passedUntilEndOfTurn) {
          if (game.getTurn().getStepType() == PhaseStep.END_TURN) {
            if (!skippedAtLeastOnce || (playerId.equals(game.getActivePlayerId()) && !controllingPlayer.getUserData().getUserSkipPrioritySteps().isStopOnAllEndPhases())) {
              skippedAtLeastOnce=true;
              if (passWithManaPoolCheck(game)) {
                return false;
              }
            }
 else {
              dontCheckPassStep=true;
              passedUntilEndOfTurn=false;
            }
          }
 else {
            skippedAtLeastOnce=true;
            if (passWithManaPoolCheck(game)) {
              return false;
            }
          }
        }
        if (!dontCheckPassStep && checkPassStep(game,controllingPlayer)) {
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
      }
 else       if (passedUntilStackResolved) {
        if (dateLastAddedToStack == game.getStack().getDateLastAdded()) {
          dateLastAddedToStack=game.getStack().getDateLastAdded();
          if (passWithManaPoolCheck(game)) {
            return false;
          }
        }
 else {
          passedUntilStackResolved=false;
        }
      }
    }
    while (canRespond()) {
      updateGameStatePriority("String_Node_Str",game);
      holdingPriority=false;
      prepareForResponse(game);
      if (!isExecutingMacro()) {
        game.firePriorityEvent(playerId);
      }
      waitForResponse(game);
      if (game.executingRollback()) {
        return true;
      }
      if (response.getBoolean() != null || response.getInteger() != null) {
        if (passWithManaPoolCheck(game) && !activatingMacro) {
          return false;
        }
 else {
          if (activatingMacro) {
synchronized (actionQueue) {
              actionQueue.notifyAll();
            }
          }
          continue;
        }
      }
      break;
    }
    if (response.getString() != null && response.getString().equals("String_Node_Str")) {
      specialAction(game);
    }
 else     if (response.getUUID() != null) {
      boolean result=false;
      MageObject object=game.getObject(response.getUUID());
      if (object != null) {
        Zone zone=game.getState().getZone(object.getId());
        if (zone != null) {
          if (object instanceof Card && ((Card)object).isFaceDown(game) && lookAtFaceDownCard((Card)object,game)) {
            result=true;
          }
 else {
            Player actingPlayer=null;
            if (playerId.equals(game.getPriorityPlayerId())) {
              actingPlayer=this;
            }
 else             if (getPlayersUnderYourControl().contains(game.getPriorityPlayerId())) {
              actingPlayer=game.getPlayer(game.getPriorityPlayerId());
            }
            if (actingPlayer != null) {
              LinkedHashMap<UUID,ActivatedAbility> useableAbilities=actingPlayer.getUseableActivatedAbilities(object,zone,game);
              if (useableAbilities != null && !useableAbilities.isEmpty()) {
                activateAbility(useableAbilities,object,game);
                result=true;
              }
            }
          }
        }
      }
      return result;
    }
 else     if (response.getManaType() != null) {
      return false;
    }
    return true;
  }
  return false;
}