Program: 166701
Project: 166701
Buggy source:
/** 
 * Check if a Sentence provide a better answer to a Question or Goal
 * @param belief The proposed answer
 * @param task The task to be processed
 * @param memory Reference to the memory
 */
public static boolean trySolution(Sentence belief,final Task task,final DerivationContext nal){
  Sentence problem=task.sentence;
  Memory memory=nal.mem();
  if (!TemporalRules.matchingOrder(problem.getTemporalOrder(),belief.getTemporalOrder())) {
    memory.emit(Unsolved.class,task,belief,"String_Node_Str");
    return false;
  }
  if (task.sentence.containQueryVar() && belief.containQueryVar()) {
    return false;
  }
  Sentence oldBest=task.getBestSolution();
  float newQ=TemporalRules.solutionQuality(problem,belief,memory);
  if (oldBest != null) {
    float oldQ=TemporalRules.solutionQuality(problem,oldBest,memory);
    if (oldQ >= newQ) {
      if (problem.isGoal()) {
        memory.emotion.adjustHappy(oldQ,task.getPriority(),nal);
      }
      memory.emit(Unsolved.class,task,belief,"String_Node_Str");
      return false;
    }
  }
  task.setBestSolution(memory,belief);
  if (problem.isGoal()) {
    memory.emotion.adjustHappy(newQ,task.getPriority(),nal);
  }
  BudgetValue budget=TemporalRules.solutionEval(problem,belief,task,nal);
  if ((budget != null) && budget.aboveThreshold()) {
    if (task.sentence.punctuation == Symbols.QUESTION_MARK || task.sentence.punctuation == Symbols.QUEST_MARK) {
      if (task.isInput()) {
        memory.emit(Answer.class,task,belief);
      }
 else {
        memory.emit(Output.class,task,belief);
      }
    }
 else {
      memory.emit(Output.class,task,belief);
    }
    nal.addTask(nal.getCurrentTask(),budget,belief,task.getParentBelief());
    return true;
  }
 else {
    memory.emit(Unsolved.class,task,belief,"String_Node_Str");
  }
  return false;
}

Fixed version (ground truth):
/** 
 * Check if a Sentence provide a better answer to a Question or Goal
 * @param belief The proposed answer
 * @param task The task to be processed
 * @param memory Reference to the memory
 */
public static boolean trySolution(Sentence belief,final Task task,final DerivationContext nal){
  Sentence problem=task.sentence;
  Memory memory=nal.mem();
  Sentence oldBest=task.getBestSolution();
  float newQ=TemporalRules.solutionQuality(problem,belief,memory);
  if (oldBest != null) {
    float oldQ=TemporalRules.solutionQuality(problem,oldBest,memory);
    if (oldQ >= newQ) {
      if (problem.isGoal()) {
        memory.emotion.adjustHappy(oldQ,task.getPriority(),nal);
      }
      memory.emit(Unsolved.class,task,belief,"String_Node_Str");
      return false;
    }
  }
  task.setBestSolution(memory,belief);
  if (problem.isGoal()) {
    memory.emotion.adjustHappy(newQ,task.getPriority(),nal);
  }
  BudgetValue budget=TemporalRules.solutionEval(problem,belief,task,nal);
  if ((budget != null) && budget.aboveThreshold()) {
    if (task.sentence.punctuation == Symbols.QUESTION_MARK || task.sentence.punctuation == Symbols.QUEST_MARK) {
      if (task.isInput()) {
        memory.emit(Answer.class,task,belief);
      }
 else {
        memory.emit(Output.class,task,belief);
      }
    }
 else {
      memory.emit(Output.class,task,belief);
    }
    nal.addTask(nal.getCurrentTask(),budget,belief,task.getParentBelief());
    return true;
  }
 else {
    memory.emit(Unsolved.class,task,belief,"String_Node_Str");
  }
  return false;
}