Program: 69134
Project: 69134
Buggy source:
private void handleOfferAvailabilityRequest(OfferAvailabilityRequest message,NodeAddress sender){
  log.trace("String_Node_Str" + message.getClass().getSimpleName() + "String_Node_Str"+ sender);
  if (p2PService.isBootstrapped()) {
    if (!stopped) {
      try {
        Validator.nonEmptyStringOf(message.offerId);
        checkNotNull(message.getPubKeyRing());
      }
 catch (      Throwable t) {
        log.warn("String_Node_Str" + message.toString());
        return;
      }
      Optional<OpenOffer> openOfferOptional=getOpenOfferById(message.offerId);
      AvailabilityResult availabilityResult;
      if (openOfferOptional.isPresent()) {
        if (openOfferOptional.get().getState() == OpenOffer.State.AVAILABLE) {
          final Offer offer=openOfferOptional.get().getOffer();
          if (!preferences.getIgnoreTradersList().stream().filter(i -> i.equals(offer.getMakerNodeAddress().getHostNameWithoutPostFix())).findAny().isPresent()) {
            availabilityResult=AvailabilityResult.AVAILABLE;
            List<NodeAddress> acceptedArbitrators=user.getAcceptedArbitratorAddresses();
            if (acceptedArbitrators != null && !acceptedArbitrators.isEmpty()) {
              try {
                offer.checkTradePriceTolerance(message.getTakersTradePrice());
              }
 catch (              TradePriceOutOfToleranceException e) {
                log.warn("String_Node_Str");
                availabilityResult=AvailabilityResult.PRICE_OUT_OF_TOLERANCE;
              }
catch (              MarketPriceNotAvailableException e) {
                log.warn(e.getMessage());
                availabilityResult=AvailabilityResult.MARKET_PRICE_NOT_AVAILABLE;
              }
catch (              Throwable e) {
                log.warn("String_Node_Str" + e.getMessage());
                availabilityResult=AvailabilityResult.UNKNOWN_FAILURE;
              }
            }
 else {
              log.warn("String_Node_Str" + acceptedArbitrators);
              availabilityResult=AvailabilityResult.NO_ARBITRATORS;
            }
          }
 else {
            availabilityResult=AvailabilityResult.USER_IGNORED;
          }
        }
 else {
          availabilityResult=AvailabilityResult.OFFER_TAKEN;
        }
      }
 else {
        log.warn("String_Node_Str");
        availabilityResult=AvailabilityResult.OFFER_TAKEN;
      }
      try {
        p2PService.sendEncryptedDirectMessage(sender,message.getPubKeyRing(),new OfferAvailabilityResponse(message.offerId,availabilityResult),new SendDirectMessageListener(){
          @Override public void onArrived(){
            log.trace("String_Node_Str");
          }
          @Override public void onFault(){
            log.debug("String_Node_Str");
          }
        }
);
      }
 catch (      Throwable t) {
        t.printStackTrace();
        log.debug("String_Node_Str" + t.getMessage());
      }
    }
 else {
      log.debug("String_Node_Str");
    }
  }
 else {
    log.info("String_Node_Str");
  }
}

Fixed version (ground truth):
private void handleOfferAvailabilityRequest(OfferAvailabilityRequest message,NodeAddress sender){
  log.trace("String_Node_Str" + message.getClass().getSimpleName() + "String_Node_Str"+ sender);
  if (p2PService.isBootstrapped()) {
    if (!stopped) {
      try {
        Validator.nonEmptyStringOf(message.offerId);
        checkNotNull(message.getPubKeyRing());
      }
 catch (      Throwable t) {
        log.warn("String_Node_Str" + message.toString());
        return;
      }
      Optional<OpenOffer> openOfferOptional=getOpenOfferById(message.offerId);
      AvailabilityResult availabilityResult;
      if (openOfferOptional.isPresent()) {
        if (openOfferOptional.get().getState() == OpenOffer.State.AVAILABLE) {
          final Offer offer=openOfferOptional.get().getOffer();
          if (!preferences.getIgnoreTradersList().stream().anyMatch(i -> i.equals(offer.getMakerNodeAddress().getHostNameWithoutPostFix()))) {
            availabilityResult=AvailabilityResult.AVAILABLE;
            List<NodeAddress> acceptedArbitrators=user.getAcceptedArbitratorAddresses();
            if (acceptedArbitrators != null && !acceptedArbitrators.isEmpty()) {
              try {
                offer.checkTradePriceTolerance(message.getTakersTradePrice());
              }
 catch (              TradePriceOutOfToleranceException e) {
                log.warn("String_Node_Str");
                availabilityResult=AvailabilityResult.PRICE_OUT_OF_TOLERANCE;
              }
catch (              MarketPriceNotAvailableException e) {
                log.warn(e.getMessage());
                availabilityResult=AvailabilityResult.MARKET_PRICE_NOT_AVAILABLE;
              }
catch (              Throwable e) {
                log.warn("String_Node_Str" + e.getMessage());
                availabilityResult=AvailabilityResult.UNKNOWN_FAILURE;
              }
            }
 else {
              log.warn("String_Node_Str" + acceptedArbitrators);
              availabilityResult=AvailabilityResult.NO_ARBITRATORS;
            }
          }
 else {
            availabilityResult=AvailabilityResult.USER_IGNORED;
          }
        }
 else {
          availabilityResult=AvailabilityResult.OFFER_TAKEN;
        }
      }
 else {
        log.warn("String_Node_Str");
        availabilityResult=AvailabilityResult.OFFER_TAKEN;
      }
      try {
        p2PService.sendEncryptedDirectMessage(sender,message.getPubKeyRing(),new OfferAvailabilityResponse(message.offerId,availabilityResult),new SendDirectMessageListener(){
          @Override public void onArrived(){
            log.trace("String_Node_Str");
          }
          @Override public void onFault(){
            log.debug("String_Node_Str");
          }
        }
);
      }
 catch (      Throwable t) {
        t.printStackTrace();
        log.debug("String_Node_Str" + t.getMessage());
      }
    }
 else {
      log.debug("String_Node_Str");
    }
  }
 else {
    log.info("String_Node_Str");
  }
}