Program: 40448
Project: 40448
Buggy source:
private boolean changeGroup(CommandEvent commandEvent,Config config,User user,String userName,String[] args){
  String whatToChangeTo;
  StringBuilder gymNameBuilder;
  String gymName;
  Gym gym;
  Raid raid;
  whatToChangeTo=args[1].trim().toLowerCase();
  gymNameBuilder=new StringBuilder();
  for (int i=2; i < args.length; i++) {
    gymNameBuilder.append(args[i]).append("String_Node_Str");
  }
  gymName=gymNameBuilder.toString().trim();
  gym=gymRepository.search(user,gymName,config.getRegion());
  raid=raidRepository.getActiveRaidOrFallbackToExRaid(gym,config.getRegion(),user);
  verifyGroupPermission(commandEvent,user,raid,config);
  LocalTime newTime=parseTime(user,whatToChangeTo,localeService);
  LocalDateTime newDateTime=LocalDateTime.of(raid.getEndOfRaid().toLocalDate(),newTime);
  assertTimeInRaidTimespan(user,newDateTime,raid,localeService);
  assertGroupTimeNotBeforeNow(user,newDateTime,localeService);
  if (raidRepository.existsGroupForRaidAt(raid,newDateTime)) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.GROUP_NOT_ADDED,localeService.getLocaleForUser(user),String.valueOf(raid)));
  }
  if (raidRepository.hasManyGroupsForRaid(user,raid)) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.MANY_GROUPS_FOR_RAID,localeService.getLocaleForUser(user),String.valueOf(raid)));
  }
  int counter=0;
  boolean groupChanged=false;
  final Set<EmoticonSignUpMessageListener> listenersToCheck=new HashSet<>();
  for (  Object o : botService.getBot().getRegisteredListeners()) {
    if (o instanceof EmoticonSignUpMessageListener) {
      EmoticonSignUpMessageListener listener=(EmoticonSignUpMessageListener)o;
      final String raidId=raid.getId();
      final boolean isCorrectRaid=raidId.equals(listener.getRaidId());
      final boolean isUsersGroup=user.getId().equals(listener.getUserId());
      if (isCorrectRaid && isUsersGroup) {
        listenersToCheck.add(listener);
        break;
      }
      if (isCorrectRaid && (isUserAdministrator(commandEvent) || isUserServerMod(commandEvent,config))) {
        listenersToCheck.add(listener);
      }
    }
  }
  if (listenersToCheck.size() > 1) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.MANY_GROUPS_FOR_RAID,localeService.getLocaleForUser(user),String.valueOf(raid)));
  }
 else   if (listenersToCheck.size() == 0) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.NO_PERMISSION,localeService.getLocaleForUser(user)));
  }
  for (  EmoticonSignUpMessageListener listener : listenersToCheck) {
    final String raidId=raid.getId();
    final LocalDateTime currentStartAt=listener.getStartAt();
    if (currentStartAt != null && currentStartAt.equals(newDateTime)) {
    }
 else     if (currentStartAt != null) {
      LOGGER.info("String_Node_Str" + currentStartAt + "String_Node_Str"+ newDateTime);
      RaidGroup raidGroup=raidRepository.changeGroup(user,raidId,listener.getUserId(),currentStartAt,newDateTime);
      raidRepository.moveAllSignUpsForTimeToNewTime(raidId,currentStartAt,newDateTime,user);
      listener.setStartAt(newDateTime);
      groupChanged=true;
      replyBasedOnConfigAndRemoveAfter(config,commandEvent,localeService.getMessageFor(LocaleService.MOVED_GROUP,localeService.getLocaleForUser(user),printTimeIfSameDay(currentStartAt),printTimeIfSameDay(newDateTime),raid.getGym().getName()),30);
      LOGGER.info("String_Node_Str" + raidGroup);
    }
 else {
      replyBasedOnConfigAndRemoveAfter(config,commandEvent,localeService.getMessageFor(LocaleService.GROUP_CLEANING_UP,localeService.getLocaleForUser(user)),BotServerMain.timeToRemoveFeedbackInSeconds);
      commandEvent.getMessage().delete().queueAfter(50,TimeUnit.MILLISECONDS);
      return true;
    }
  }
  if (!groupChanged) {
    throw new UserMessedUpException(userName,localeService.getMessageFor(LocaleService.BAD_SYNTAX,localeService.getLocaleForUser(user)));
  }
  return false;
}

Fixed version (ground truth):
private boolean changeGroup(CommandEvent commandEvent,Config config,User user,String userName,String[] args){
  String whatToChangeTo;
  StringBuilder gymNameBuilder;
  String gymName;
  Gym gym;
  Raid raid;
  whatToChangeTo=args[1].trim().toLowerCase();
  gymNameBuilder=new StringBuilder();
  for (int i=2; i < args.length; i++) {
    gymNameBuilder.append(args[i]).append("String_Node_Str");
  }
  gymName=gymNameBuilder.toString().trim();
  gym=gymRepository.search(user,gymName,config.getRegion());
  raid=raidRepository.getActiveRaidOrFallbackToExRaid(gym,config.getRegion(),user);
  verifyGroupPermission(commandEvent,user,raid,config);
  LocalTime newTime=parseTime(user,whatToChangeTo,localeService);
  LocalDateTime newDateTime=LocalDateTime.of(raid.getEndOfRaid().toLocalDate(),newTime);
  assertTimeInRaidTimespan(user,newDateTime,raid,localeService);
  assertGroupTimeNotBeforeNow(user,newDateTime,localeService);
  if (raidRepository.existsGroupForRaidAt(raid,newDateTime)) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.GROUP_NOT_ADDED,localeService.getLocaleForUser(user),String.valueOf(raid)));
  }
  if (raidRepository.hasManyGroupsForRaid(user,raid)) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.MANY_GROUPS_FOR_RAID,localeService.getLocaleForUser(user),String.valueOf(raid)));
  }
  boolean groupChanged=false;
  final Set<EmoticonSignUpMessageListener> listenersToCheck=new HashSet<>();
  for (  Object o : botService.getBot().getRegisteredListeners()) {
    if (o instanceof EmoticonSignUpMessageListener) {
      EmoticonSignUpMessageListener listener=(EmoticonSignUpMessageListener)o;
      final String raidId=raid.getId();
      final boolean isCorrectRaid=raidId.equals(listener.getRaidId());
      final boolean isUsersGroup=user.getId().equals(listener.getUserId());
      if (isCorrectRaid && isUsersGroup) {
        listenersToCheck.add(listener);
        break;
      }
    }
  }
  if (listenersToCheck.size() == 0) {
    for (    Object o : botService.getBot().getRegisteredListeners()) {
      if (o instanceof EmoticonSignUpMessageListener) {
        EmoticonSignUpMessageListener listener=(EmoticonSignUpMessageListener)o;
        final String raidId=raid.getId();
        final boolean isCorrectRaid=raidId.equals(listener.getRaidId());
        if (isCorrectRaid && (isUserAdministrator(commandEvent) || isUserServerMod(commandEvent,config))) {
          listenersToCheck.add(listener);
        }
      }
    }
  }
  if (listenersToCheck.size() > 1) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.MANY_GROUPS_FOR_RAID,localeService.getLocaleForUser(user),String.valueOf(raid)));
  }
 else   if (listenersToCheck.size() == 0) {
    throw new UserMessedUpException(user,localeService.getMessageFor(LocaleService.NO_PERMISSION,localeService.getLocaleForUser(user)));
  }
  for (  EmoticonSignUpMessageListener listener : listenersToCheck) {
    final String raidId=raid.getId();
    final LocalDateTime currentStartAt=listener.getStartAt();
    if (currentStartAt != null && currentStartAt.equals(newDateTime)) {
    }
 else     if (currentStartAt != null) {
      LOGGER.info("String_Node_Str" + currentStartAt + "String_Node_Str"+ newDateTime);
      RaidGroup raidGroup=raidRepository.changeGroup(user,raidId,listener.getUserId(),currentStartAt,newDateTime);
      raidRepository.moveAllSignUpsForTimeToNewTime(raidId,currentStartAt,newDateTime,user);
      listener.setStartAt(newDateTime);
      groupChanged=true;
      replyBasedOnConfigAndRemoveAfter(config,commandEvent,localeService.getMessageFor(LocaleService.MOVED_GROUP,localeService.getLocaleForUser(user),printTimeIfSameDay(currentStartAt),printTimeIfSameDay(newDateTime),raid.getGym().getName()),30);
      LOGGER.info("String_Node_Str" + raidGroup);
    }
 else {
      replyBasedOnConfigAndRemoveAfter(config,commandEvent,localeService.getMessageFor(LocaleService.GROUP_CLEANING_UP,localeService.getLocaleForUser(user)),BotServerMain.timeToRemoveFeedbackInSeconds);
      commandEvent.getMessage().delete().queueAfter(50,TimeUnit.MILLISECONDS);
      return true;
    }
  }
  if (!groupChanged) {
    throw new UserMessedUpException(userName,localeService.getMessageFor(LocaleService.BAD_SYNTAX,localeService.getLocaleForUser(user)));
  }
  return false;
}