Program: 69118
Project: 69118
Buggy source:
public Contract(OfferPayload offerPayload,long tradeAmount,long tradePrice,String takerFeeTxID,NodeAddress buyerNodeAddress,NodeAddress sellerNodeAddress,NodeAddress arbitratorNodeAddress,NodeAddress mediatorNodeAddress,boolean isBuyerMakerAndSellerTaker,String makerAccountId,String takerAccountId,PaymentAccountPayload makerPaymentAccountPayload,PaymentAccountPayload takerPaymentAccountPayload,PubKeyRing makerPubKeyRing,PubKeyRing takerPubKeyRing,String makerPayoutAddressString,String takerPayoutAddressString,byte[] makerMultiSigPubKey,byte[] takerMultiSigPubKey){
  this.offerPayload=offerPayload;
  this.tradeAmount=tradeAmount;
  this.tradePrice=tradePrice;
  this.takerFeeTxID=takerFeeTxID;
  this.buyerNodeAddress=buyerNodeAddress;
  this.sellerNodeAddress=sellerNodeAddress;
  this.arbitratorNodeAddress=arbitratorNodeAddress;
  this.mediatorNodeAddress=mediatorNodeAddress;
  this.isBuyerMakerAndSellerTaker=isBuyerMakerAndSellerTaker;
  this.makerAccountId=makerAccountId;
  this.takerAccountId=takerAccountId;
  this.makerPaymentAccountPayload=makerPaymentAccountPayload;
  this.takerPaymentAccountPayload=takerPaymentAccountPayload;
  this.makerPubKeyRing=makerPubKeyRing;
  this.takerPubKeyRing=takerPubKeyRing;
  this.makerPayoutAddressString=makerPayoutAddressString;
  this.takerPayoutAddressString=takerPayoutAddressString;
  this.makerMultiSigPubKey=makerMultiSigPubKey;
  this.takerMultiSigPubKey=takerMultiSigPubKey;
  checkArgument(makerPaymentAccountPayload.getPaymentMethodId().equals(takerPaymentAccountPayload.getPaymentMethodId()),"String_Node_Str" + "String_Node_Str" + makerPaymentAccountPayload.getPaymentMethodId() + "String_Node_Str"+ "String_Node_Str"+ takerPaymentAccountPayload.getPaymentMethodId());
}

Fixed version (ground truth):
public Contract(OfferPayload offerPayload,long tradeAmount,long tradePrice,String takerFeeTxID,NodeAddress buyerNodeAddress,NodeAddress sellerNodeAddress,NodeAddress arbitratorNodeAddress,NodeAddress mediatorNodeAddress,boolean isBuyerMakerAndSellerTaker,String makerAccountId,String takerAccountId,PaymentAccountPayload makerPaymentAccountPayload,PaymentAccountPayload takerPaymentAccountPayload,PubKeyRing makerPubKeyRing,PubKeyRing takerPubKeyRing,String makerPayoutAddressString,String takerPayoutAddressString,byte[] makerMultiSigPubKey,byte[] takerMultiSigPubKey){
  this.offerPayload=offerPayload;
  this.tradeAmount=tradeAmount;
  this.tradePrice=tradePrice;
  this.takerFeeTxID=takerFeeTxID;
  this.buyerNodeAddress=buyerNodeAddress;
  this.sellerNodeAddress=sellerNodeAddress;
  this.arbitratorNodeAddress=arbitratorNodeAddress;
  this.mediatorNodeAddress=mediatorNodeAddress;
  this.isBuyerMakerAndSellerTaker=isBuyerMakerAndSellerTaker;
  this.makerAccountId=makerAccountId;
  this.takerAccountId=takerAccountId;
  this.makerPaymentAccountPayload=makerPaymentAccountPayload;
  this.takerPaymentAccountPayload=takerPaymentAccountPayload;
  this.makerPubKeyRing=makerPubKeyRing;
  this.takerPubKeyRing=takerPubKeyRing;
  this.makerPayoutAddressString=makerPayoutAddressString;
  this.takerPayoutAddressString=takerPayoutAddressString;
  this.makerMultiSigPubKey=makerMultiSigPubKey;
  this.takerMultiSigPubKey=takerMultiSigPubKey;
  String makerPaymentMethodId=makerPaymentAccountPayload.getPaymentMethodId();
  String takerPaymentMethodId=takerPaymentAccountPayload.getPaymentMethodId();
  boolean result=(makerPaymentMethodId.equals(PaymentMethod.SEPA_ID) && takerPaymentMethodId.equals(PaymentMethod.SEPA_INSTANT_ID)) || makerPaymentMethodId.equals(takerPaymentMethodId);
  checkArgument(result,"String_Node_Str" + "String_Node_Str" + makerPaymentMethodId + "String_Node_Str"+ "String_Node_Str"+ takerPaymentMethodId);
}