Program: 61504
Project: 61504
Buggy source:
@Override public Ingredient getFixIngredient(ModificationPoint modificationPoint,AstorOperator op){
  if (key2element.isEmpty())   key2element=queryelements().orElseThrow(RuntimeException::new);
  T suspicious=(T)modificationPoint.getCodeElement().getParent(typeFilter);
  if (suspicious == null) {
    log.info("String_Node_Str" + cls.getName() + "String_Node_Str"+ modificationPoint);
    return null;
  }
  String key=getkey(suspicious);
  log.debug("String_Node_Str" + key);
  if (!key2element.containsKey(key)) {
    log.error("String_Node_Str" + key);
    throw new RuntimeException();
  }
  if (!element2simlist.containsKey(suspicious))   computesimlist(suspicious);
  Queue<CtCodeElement> fixspace=getfixspace(modificationPoint,op,suspicious);
  int searchSpaceSize=fixspace.size();
  log.debug("String_Node_Str" + fixspace.isEmpty());
  if (fixspace.isEmpty())   return null;
  boolean continueSearching=true;
  int variant_id=modificationPoint.getProgramVariant().getId();
  Stats.currentStat.initializeIngCounter(variant_id);
  while (continueSearching) {
    CtElement ingredient=getingredient(fixspace);
    log.debug("String_Node_Str" + modificationPoint);
    if (ingredient == null)     return null;
    log.debug("String_Node_Str" + ingredient.getShortRepresentation());
    boolean alreadyApplied=alreadySelected(modificationPoint,ingredient,op);
    if (alreadyApplied) {
      log.debug("String_Node_Str");
      continue;
    }
    boolean sameCode=ingredient.equals(modificationPoint.getCodeElement());
    if (sameCode) {
      log.debug("String_Node_Str");
      continue;
    }
    boolean transformIngredient=ConfigurationProperties.getPropertyBool("String_Node_Str");
    if (transformIngredient) {
      if (modificationPoint.getContextOfModificationPoint().isEmpty()) {
        log.debug("String_Node_Str");
      }
      VarMapping mapping=VariableResolver.mapVariables(modificationPoint.getContextOfModificationPoint(),ingredient);
      if (mapping.getNotMappedVariables().isEmpty()) {
        if (mapping.getMappedVariables().isEmpty()) {
          log.debug("String_Node_Str");
          continueSearching=false;
        }
 else {
          log.debug("String_Node_Str" + ingredient);
          List<Map<String,CtVariable>> allCombinations=VariableResolver.findAllVarMappingCombination(mapping.getMappedVariables());
          if (allCombinations.size() > 0) {
            Map<String,CtVariable> selectedTransformation=allCombinations.get(0);
            log.debug("String_Node_Str" + selectedTransformation);
            Map<VarAccessWrapper,CtVariableAccess> originalMap=VariableResolver.convertIngredient(mapping,selectedTransformation);
            log.debug("String_Node_Str" + ingredient);
            continueSearching=!VariableResolver.fitInPlace(modificationPoint.getContextOfModificationPoint(),ingredient);
          }
        }
      }
 else {
        log.debug("String_Node_Str" + mapping.getNotMappedVariables());
      }
    }
 else {
      continueSearching=!VariableResolver.fitInPlace(modificationPoint.getContextOfModificationPoint(),ingredient);
    }
    Stats.currentStat.incrementIngCounter(variant_id);
    if (!continueSearching) {
      IngredientSpaceScope scope=determineIngredientScope(modificationPoint.getCodeElement(),ingredient);
      int ingCounter=Stats.currentStat.getIngCounter(variant_id);
      log.debug("String_Node_Str" + ingCounter);
      return new Ingredient(ingredient,scope);
    }
  }
  log.debug("String_Node_Str" + modificationPoint.getCodeElement() + "String_Node_Str"+ searchSpaceSize);
  return null;
}

Fixed version (ground truth):
@Override public Ingredient getFixIngredient(ModificationPoint modificationPoint,AstorOperator op){
  if (key2element.isEmpty())   key2element=queryelements().orElseThrow(RuntimeException::new);
  T suspicious=(T)modificationPoint.getCodeElement().getParent(typeFilter);
  if (suspicious == null) {
    log.info("String_Node_Str" + cls.getName() + "String_Node_Str"+ modificationPoint);
    return null;
  }
  String key=getkey(suspicious);
  log.debug("String_Node_Str" + key);
  if (!key2element.containsKey(key)) {
    log.error("String_Node_Str" + key);
    throw new RuntimeException();
  }
  if (!element2simlist.containsKey(suspicious))   computesimlist(suspicious);
  Queue<CtCodeElement> fixspace=getfixspace(modificationPoint,op,suspicious);
  int searchSpaceSize=fixspace.size();
  log.debug("String_Node_Str" + fixspace.isEmpty());
  if (fixspace.isEmpty())   return null;
  boolean continueSearching=true;
  int variant_id=modificationPoint.getProgramVariant().getId();
  Stats.currentStat.initializeIngCounter(variant_id);
  while (continueSearching) {
    CtElement ingredient=getingredient(fixspace);
    log.debug("String_Node_Str" + modificationPoint);
    if (ingredient == null)     return null;
    log.debug("String_Node_Str" + StringUtil.trunc(ingredient.getShortRepresentation()));
    boolean alreadyApplied=alreadySelected(modificationPoint,ingredient,op);
    if (alreadyApplied) {
      log.debug("String_Node_Str" + modificationPoint + "String_Node_Str"+ StringUtil.trunc(ingredient));
      continue;
    }
    boolean sameCode=ingredient.equals(modificationPoint.getCodeElement());
    if (sameCode) {
      log.debug("String_Node_Str");
      continue;
    }
    boolean transformIngredient=ConfigurationProperties.getPropertyBool("String_Node_Str");
    if (transformIngredient) {
      if (modificationPoint.getContextOfModificationPoint().isEmpty()) {
        log.debug("String_Node_Str");
      }
      VarMapping mapping=VariableResolver.mapVariables(modificationPoint.getContextOfModificationPoint(),ingredient);
      if (mapping.getNotMappedVariables().isEmpty()) {
        if (mapping.getMappedVariables().isEmpty()) {
          log.debug("String_Node_Str");
          continueSearching=false;
        }
 else {
          log.debug("String_Node_Str" + ingredient);
          List<Map<String,CtVariable>> allCombinations=VariableResolver.findAllVarMappingCombination(mapping.getMappedVariables());
          if (allCombinations.size() > 0) {
            Map<String,CtVariable> selectedTransformation=allCombinations.get(0);
            log.debug("String_Node_Str" + selectedTransformation);
            Map<VarAccessWrapper,CtVariableAccess> originalMap=VariableResolver.convertIngredient(mapping,selectedTransformation);
            log.debug("String_Node_Str" + ingredient);
            continueSearching=!VariableResolver.fitInPlace(modificationPoint.getContextOfModificationPoint(),ingredient);
          }
        }
      }
 else {
        log.debug("String_Node_Str" + mapping.getNotMappedVariables());
      }
    }
 else {
      continueSearching=!VariableResolver.fitInPlace(modificationPoint.getContextOfModificationPoint(),ingredient);
    }
    Stats.currentStat.incrementIngCounter(variant_id);
    if (!continueSearching) {
      IngredientSpaceScope scope=determineIngredientScope(modificationPoint.getCodeElement(),ingredient);
      int ingCounter=Stats.currentStat.getIngCounter(variant_id);
      log.debug("String_Node_Str" + ingCounter);
      return new Ingredient(ingredient,scope);
    }
  }
  log.debug("String_Node_Str" + modificationPoint.getCodeElement() + "String_Node_Str"+ searchSpaceSize);
  return null;
}