Program: 155156
Project: 155156
Buggy source:
private static void checkRelationshipList(int i,int node,int prev,int next,FileChannel fileChannel,ByteBuffer buffer) throws IOException {
  long fileSize=fileChannel.size();
  int recordSize=33;
  if (next != NO_NEXT_BLOCK) {
    if ((next + 1) * recordSize > fileSize || next < 0) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    buffer.clear();
    fileChannel.position((long)next * recordSize);
    fileChannel.read(buffer);
    buffer.flip();
    byte inUse=buffer.get();
    if (inUse != RECORD_IN_USE + NOT_DIRECTED && inUse != RECORD_IN_USE + DIRECTED) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    int firstNode=buffer.getInt();
    int secondNode=buffer.getInt();
    buffer.getInt();
    int firstPrev=buffer.getInt();
    buffer.getInt();
    int secondPrev=buffer.getInt();
    buffer.getInt();
    if (firstNode != node && secondNode != node) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    if (firstNode == node && firstPrev != i) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    if (secondNode == node && secondPrev != i) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
  }
  if (prev != NO_PREV_BLOCK) {
    if ((prev + 1) * recordSize > fileSize || prev < 0) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
    buffer.clear();
    fileChannel.position((long)prev * recordSize);
    fileChannel.read(buffer);
    buffer.flip();
    byte inUse=buffer.get();
    if (inUse != RECORD_IN_USE + NOT_DIRECTED && inUse != RECORD_IN_USE + DIRECTED) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
    int firstNode=buffer.getInt();
    int secondNode=buffer.getInt();
    buffer.getInt();
    buffer.getInt();
    int firstNext=buffer.getInt();
    buffer.getInt();
    int secondNext=buffer.getInt();
    if (firstNode != node && secondNode != node) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    if (firstNode == node && firstNext != i) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
    if (secondNode == node && secondNext != i) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
  }
}

Fixed version (ground truth):
private static void checkRelationshipList(int i,int node,int prev,int next,FileChannel fileChannel,ByteBuffer buffer) throws IOException {
  long fileSize=fileChannel.size();
  int recordSize=33;
  if (next != NO_NEXT_BLOCK) {
    if ((long)(next + 1) * recordSize > fileSize || next < 0) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    buffer.clear();
    fileChannel.position((long)next * recordSize);
    fileChannel.read(buffer);
    buffer.flip();
    byte inUse=buffer.get();
    if (inUse != RECORD_IN_USE + NOT_DIRECTED && inUse != RECORD_IN_USE + DIRECTED) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    int firstNode=buffer.getInt();
    int secondNode=buffer.getInt();
    buffer.getInt();
    int firstPrev=buffer.getInt();
    buffer.getInt();
    int secondPrev=buffer.getInt();
    buffer.getInt();
    if (firstNode != node && secondNode != node) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    if (firstNode == node && firstPrev != i) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    if (secondNode == node && secondPrev != i) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
  }
  if (prev != NO_PREV_BLOCK) {
    if ((long)(prev + 1) * recordSize > fileSize || prev < 0) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
    buffer.clear();
    fileChannel.position((long)prev * recordSize);
    fileChannel.read(buffer);
    buffer.flip();
    byte inUse=buffer.get();
    if (inUse != RECORD_IN_USE + NOT_DIRECTED && inUse != RECORD_IN_USE + DIRECTED) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
    int firstNode=buffer.getInt();
    int secondNode=buffer.getInt();
    buffer.getInt();
    buffer.getInt();
    int firstNext=buffer.getInt();
    buffer.getInt();
    int secondNext=buffer.getInt();
    if (firstNode != node && secondNode != node) {
      throw new IOException("String_Node_Str" + next + "String_Node_Str"+ i);
    }
    if (firstNode == node && firstNext != i) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
    if (secondNode == node && secondNext != i) {
      throw new IOException("String_Node_Str" + prev + "String_Node_Str"+ i);
    }
  }
}