Program: 29289
Project: 29289
Buggy source:
private String encode(long... numbers){
  int numberHashInt=0;
  for (int i=0; i < numbers.length; i++) {
    numberHashInt+=(numbers[i] % (i + 100));
  }
  String alphabet=this.alphabet;
  char ret=alphabet.toCharArray()[numberHashInt % alphabet.length()];
  char lottery=ret;
  long num;
  int sepsIndex, guardIndex;
  String buffer="String_Node_Str", ret_str=ret + "String_Node_Str";
  char guard;
  for (int i=0; i < numbers.length; i++) {
    num=numbers[i];
    buffer=lottery + this.salt + alphabet;
    alphabet=this.consistentShuffle(alphabet,buffer.substring(0,alphabet.length()));
    String last=this.hash((int)num,alphabet);
    ret_str+=last;
    if (i + 1 < numbers.length) {
      num%=((int)last.toCharArray()[0] + i);
      sepsIndex=(int)(num % this.seps.length());
      ret_str+=this.seps.toCharArray()[sepsIndex];
    }
  }
  if (ret_str.length() < this.minHashLength) {
    guardIndex=(numberHashInt + (int)(ret_str.toCharArray()[0])) % this.guards.length();
    guard=this.guards.toCharArray()[guardIndex];
    ret_str=guard + ret_str;
    if (ret_str.length() < this.minHashLength) {
      guardIndex=(numberHashInt + (int)(ret_str.toCharArray()[2])) % this.guards.length();
      guard=this.guards.toCharArray()[guardIndex];
      ret_str+=guard;
    }
  }
  int halfLen=(int)(this.alphabet.length() / 2);
  while (ret_str.length() < this.minHashLength) {
    this.alphabet=this.consistentShuffle(this.alphabet,this.alphabet);
    ret_str=this.alphabet.substring(halfLen) + ret_str + this.alphabet.substring(0,halfLen);
    int excess=ret_str.length() - this.minHashLength;
    if (excess > 0) {
      ret_str=ret_str.substring(excess / 2,this.minHashLength);
    }
  }
  return ret_str;
}

Fixed version (ground truth):
private String encode(long... numbers){
  int numberHashInt=0;
  for (int i=0; i < numbers.length; i++) {
    numberHashInt+=(numbers[i] % (i + 100));
  }
  String alphabet=this.alphabet;
  char ret=alphabet.toCharArray()[numberHashInt % alphabet.length()];
  char lottery=ret;
  long num;
  int sepsIndex, guardIndex;
  String buffer="String_Node_Str", ret_str=ret + "String_Node_Str";
  char guard;
  for (int i=0; i < numbers.length; i++) {
    num=numbers[i];
    buffer=lottery + this.salt + alphabet;
    alphabet=this.consistentShuffle(alphabet,buffer.substring(0,alphabet.length()));
    String last=this.hash((int)num,alphabet);
    ret_str+=last;
    if (i + 1 < numbers.length) {
      num%=((int)last.toCharArray()[0] + i);
      sepsIndex=(int)(num % this.seps.length());
      ret_str+=this.seps.toCharArray()[sepsIndex];
    }
  }
  if (ret_str.length() < this.minHashLength) {
    guardIndex=(numberHashInt + (int)(ret_str.toCharArray()[0])) % this.guards.length();
    guard=this.guards.toCharArray()[guardIndex];
    ret_str=guard + ret_str;
    if (ret_str.length() < this.minHashLength) {
      guardIndex=(numberHashInt + (int)(ret_str.toCharArray()[2])) % this.guards.length();
      guard=this.guards.toCharArray()[guardIndex];
      ret_str+=guard;
    }
  }
  int halfLen=(int)(alphabet.length() / 2);
  while (ret_str.length() < this.minHashLength) {
    alphabet=this.consistentShuffle(alphabet,alphabet);
    ret_str=alphabet.substring(halfLen) + ret_str + alphabet.substring(0,halfLen);
    int excess=ret_str.length() - this.minHashLength;
    if (excess > 0) {
      int start_pos=excess / 2;
      ret_str=ret_str.substring(start_pos,start_pos + this.minHashLength);
    }
  }
  return ret_str;
}