Program: 880
Project: 880
Buggy source:
private boolean isPredictionOfEventCorrect(EntityRef character,ActivationRequest event){
  LocationComponent location=character.getComponent(LocationComponent.class);
  CharacterComponent characterComponent=character.getComponent(CharacterComponent.class);
  Vector3f direction=characterComponent.getLookDirection();
  if (!(vectorsAreAboutEqual(event.getDirection(),direction))) {
    logger.error("String_Node_Str",event.getDirection(),direction);
  }
  direction=event.getDirection();
  Vector3f originPos=location.getWorldPosition();
  originPos.y+=characterComponent.eyeOffset;
  if (!(vectorsAreAboutEqual(event.getOrigin(),originPos))) {
    logger.info("String_Node_Str",getPlayerNameFromCharacter(character),event.getOrigin(),originPos);
    return false;
  }
  if (event.isOwnedEntityUsage()) {
    if (!event.getUsedOwnedEntity().exists()) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
    if (!networkSystem.getOwnerEntity(event.getUsedOwnedEntity()).equals(networkSystem.getOwnerEntity(character))) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
  }
 else {
    if (event.getUsedOwnedEntity().exists()) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
  }
  if (event.isEventWithTarget()) {
    if (!event.getTarget().exists()) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
    HitResult result=physics.rayTrace(originPos,direction,characterComponent.interactionRange,filter);
    if (!result.isHit()) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
    EntityRef hitEntity=result.getEntity();
    if (!hitEntity.equals(event.getTarget())) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
    if (!(vectorsAreAboutEqual(event.getHitPosition(),result.getHitPoint()))) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
  }
 else {
    if (event.getTarget().exists()) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
    if (!(vectorsAreAboutEqual(event.getHitPosition(),originPos))) {
      logger.info("String_Node_Str",getPlayerNameFromCharacter(character));
      return false;
    }
  }
  return true;
}

Fixed version (ground truth):
private boolean isPredictionOfEventCorrect(EntityRef character,ActivationRequest event){
  LocationComponent location=character.getComponent(LocationComponent.class);
  CharacterComponent characterComponent=character.getComponent(CharacterComponent.class);
  Vector3f direction=characterComponent.getLookDirection();
  if (!(vectorsAreAboutEqual(event.getDirection(),direction))) {
    logger.error("String_Node_Str",event.getDirection(),direction);
  }
  direction=event.getDirection();
  Vector3f originPos=location.getWorldPosition();
  originPos.y+=characterComponent.eyeOffset;
  if (!(vectorsAreAboutEqual(event.getOrigin(),originPos))) {
    String msg="String_Node_Str";
    logger.info(msg,getPlayerNameFromCharacter(character),event.getOrigin(),originPos);
    return false;
  }
  if (event.isOwnedEntityUsage()) {
    if (!event.getUsedOwnedEntity().exists()) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
    if (!networkSystem.getOwnerEntity(event.getUsedOwnedEntity()).equals(networkSystem.getOwnerEntity(character))) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
  }
 else {
    if (event.getUsedOwnedEntity().exists()) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
  }
  if (event.isEventWithTarget()) {
    if (!event.getTarget().exists()) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
    HitResult result=physics.rayTrace(originPos,direction,characterComponent.interactionRange,filter);
    if (!result.isHit()) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
    EntityRef hitEntity=result.getEntity();
    if (!hitEntity.equals(event.getTarget())) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
    if (!(vectorsAreAboutEqual(event.getHitPosition(),result.getHitPoint()))) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
  }
 else {
    if (event.getTarget().exists()) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
    if (!(vectorsAreAboutEqual(event.getHitPosition(),originPos))) {
      String msg="String_Node_Str";
      logger.info(msg,getPlayerNameFromCharacter(character));
      return false;
    }
  }
  return true;
}