Program: 101885
Project: 101885
Buggy source:
public boolean checkFastBreak(Player player,Block block){
  if (!Utilities.isUsingMcMMOAbility(player)) {
    int violations=FASTBREAK_MAXVIOLATIONS;
    if (player.getGameMode() == GameMode.CREATIVE) {
      violations=FASTBREAK_MAXVIOLATIONS_CREATIVE;
    }
    String name=player.getName();
    if (!player.getInventory().getItemInHand().containsEnchantment(Enchantment.DIG_SPEED) && !Utilities.isInstantBreak(block.getType()) && !isInstantBreakExempt(player)&& !(player.getInventory().getItemInHand().getType() == Material.SHEARS && block.getType() == Material.LEAVES && player.getGameMode() != GameMode.CREATIVE)) {
      if (blockPunches.get(name) != null) {
        int i=blockPunches.get(name);
        if (i < BLOCK_PUNCH_MIN) {
          return true;
        }
      }
      if (!fastBreakViolation.containsKey(name)) {
        fastBreakViolation.put(name,0);
      }
 else {
        Long math=System.currentTimeMillis() - lastBlockBroken.get(name);
        if (fastBreakViolation.get(name) > violations && math < FASTBREAK_MAXVIOLATIONTIME) {
          lastBlockBroken.put(name,System.currentTimeMillis());
          player.sendMessage(ChatColor.RED + "String_Node_Str");
          return true;
        }
 else         if (fastBreakViolation.get(name) > 0 && math > FASTBREAK_MAXVIOLATIONTIME) {
          fastBreakViolation.put(name,0);
        }
      }
      if (!blocksBroken.containsKey(name) || !lastBlockBroken.containsKey(name)) {
        if (!lastBlockBroken.containsKey(name)) {
          lastBlockBroken.put(name,System.currentTimeMillis());
        }
        blocksBroken.put(name,0);
      }
 else {
        blocksBroken.put(name,blocksBroken.get(name) + 1);
        Long math=System.currentTimeMillis() - lastBlockBroken.get(name);
        if (blocksBroken.get(name) > FASTBREAK_LIMIT && math < FASTBREAK_TIMEMAX) {
          blocksBroken.put(name,0);
          lastBlockBroken.put(name,System.currentTimeMillis());
          fastBreakViolation.put(name,fastBreakViolation.get(name) + 1);
          return true;
        }
 else         if (blocksBroken.get(name) > FASTBREAK_LIMIT) {
          lastBlockBroken.put(name,System.currentTimeMillis());
          blocksBroken.put(name,0);
        }
      }
    }
  }
  return false;
}

Fixed version (ground truth):
public boolean checkFastBreak(Player player,Block block){
  if (!Utilities.isUsingMcMMOAbility(player)) {
    int violations=FASTBREAK_MAXVIOLATIONS;
    if (player.getGameMode() == GameMode.CREATIVE) {
      violations=FASTBREAK_MAXVIOLATIONS_CREATIVE;
    }
    String name=player.getName();
    if (!player.getInventory().getItemInHand().containsEnchantment(Enchantment.DIG_SPEED) && !Utilities.isInstantBreak(block.getType()) && !isInstantBreakExempt(player)&& !(player.getInventory().getItemInHand().getType() == Material.SHEARS && block.getType() == Material.LEAVES)) {
      if (blockPunches.get(name) != null && player.getGameMode() != GameMode.CREATIVE) {
        int i=blockPunches.get(name);
        if (i < BLOCK_PUNCH_MIN) {
          return true;
        }
      }
      if (!fastBreakViolation.containsKey(name)) {
        fastBreakViolation.put(name,0);
      }
 else {
        Long math=System.currentTimeMillis() - lastBlockBroken.get(name);
        if (fastBreakViolation.get(name) > violations && math < FASTBREAK_MAXVIOLATIONTIME) {
          lastBlockBroken.put(name,System.currentTimeMillis());
          player.sendMessage(ChatColor.RED + "String_Node_Str");
          return true;
        }
 else         if (fastBreakViolation.get(name) > 0 && math > FASTBREAK_MAXVIOLATIONTIME) {
          fastBreakViolation.put(name,0);
        }
      }
      if (!blocksBroken.containsKey(name) || !lastBlockBroken.containsKey(name)) {
        if (!lastBlockBroken.containsKey(name)) {
          lastBlockBroken.put(name,System.currentTimeMillis());
        }
        blocksBroken.put(name,0);
      }
 else {
        blocksBroken.put(name,blocksBroken.get(name) + 1);
        Long math=System.currentTimeMillis() - lastBlockBroken.get(name);
        if (blocksBroken.get(name) > FASTBREAK_LIMIT && math < FASTBREAK_TIMEMAX) {
          blocksBroken.put(name,0);
          lastBlockBroken.put(name,System.currentTimeMillis());
          fastBreakViolation.put(name,fastBreakViolation.get(name) + 1);
          return true;
        }
 else         if (blocksBroken.get(name) > FASTBREAK_LIMIT) {
          lastBlockBroken.put(name,System.currentTimeMillis());
          blocksBroken.put(name,0);
        }
      }
    }
  }
  return false;
}