Program: 41944
Project: 41944
Buggy source:
public boolean execute(ICommandSender sender,String[] args){
  if (args.length < 2 && args.length >= 3 || args[1].length() > 16) {
    sender.sendMessage(getUsage());
    return true;
  }
  if ("String_Node_Str".equals(args[1]) && plugin.getConfig().getBoolean("String_Node_Str")) {
    sender.sendMessage("String_Node_Str");
    return true;
  }
  IPlayer player=(IPlayer)sender;
  if (player.hasPermission(PermissionNames.ADMIN_ADD) || player.hasPermission(PermissionNames.USER_ADD) || player.hasPermission(PermissionNames.ADMIN_TRUST)|| player.hasPermission(PermissionNames.USER_TRUST)) {
    IWorld world=player.getWorld();
    if (manager.isPlotWorld(world)) {
      PlotMapInfo pmi=manager.getMap(world);
      Plot plot=manager.getPlot(player);
      if (plot == null) {
        player.sendMessage(C("String_Node_Str"));
        return true;
      }
 else {
        UUID playerUniqueId=player.getUniqueId();
        String allowed;
        if (plot.getOwnerId().equals(playerUniqueId) || player.hasPermission(PermissionNames.ADMIN_TRUST) || player.hasPermission(PermissionNames.ADMIN_ADD)) {
          if (args[1].equals("String_Node_Str")) {
            allowed="String_Node_Str";
          }
 else {
            IOfflinePlayer offlinePlayer=serverBridge.getOfflinePlayer(args[1]);
            if (offlinePlayer == null) {
              player.sendMessage("String_Node_Str" + args[1]);
              return true;
            }
 else {
              allowed=offlinePlayer.getUniqueId().toString();
            }
          }
          if (plot.isMember(allowed).isPresent()) {
            double price=0.0;
            PlotRemoveAllowedEvent event=new PlotRemoveAllowedEvent(plot,player,allowed);
            plugin.getEventBus().post(event);
            if (manager.isEconomyEnabled(pmi) && !event.isCancelled()) {
              price=pmi.getRemovePlayerPrice();
              if (serverBridge.has(player,price)) {
                EconomyResponse er=serverBridge.withdrawPlayer(player,price);
                if (!er.transactionSuccess()) {
                  player.sendMessage(er.errorMessage);
                  serverBridge.getLogger().warning(er.errorMessage);
                  return true;
                }
              }
 else {
                player.sendMessage(C("String_Node_Str") + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ serverBridge.getEconomy().get().format(price));
                return true;
              }
            }
            if (!event.isCancelled()) {
              if ("String_Node_Str".equals(allowed)) {
                plot.removeAllMembers();
              }
 else {
                plot.removeMembers(allowed);
              }
              player.sendMessage(C("String_Node_Str") + "String_Node_Str" + allowed+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ serverBridge.getEconomy().get().format(price));
              if (isAdvancedLogging()) {
                if (price == 0) {
                  serverBridge.getLogger().info(allowed + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ allowed+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId());
                }
 else {
                  serverBridge.getLogger().info(allowed + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ allowed+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId()+ ("String_Node_Str" + C("String_Node_Str") + "String_Node_Str"+ price));
                }
              }
            }
          }
 else {
            player.sendMessage(C("String_Node_Str") + "String_Node_Str" + args[1]+ "String_Node_Str"+ C("String_Node_Str"));
          }
        }
 else {
          player.sendMessage(C("String_Node_Str") + "String_Node_Str" + plot.getId()+ "String_Node_Str"+ C("String_Node_Str"));
        }
      }
    }
 else {
      player.sendMessage(C("String_Node_Str"));
    }
  }
 else {
    return false;
  }
  return true;
}

Fixed version (ground truth):
public boolean execute(ICommandSender sender,String[] args){
  if (args.length < 2 && args.length >= 3 || args[1].length() > 16) {
    sender.sendMessage(getUsage());
    return true;
  }
  if ("String_Node_Str".equals(args[1]) && plugin.getConfig().getBoolean("String_Node_Str")) {
    sender.sendMessage("String_Node_Str");
    return true;
  }
  IPlayer player=(IPlayer)sender;
  if (player.hasPermission(PermissionNames.ADMIN_ADD) || player.hasPermission(PermissionNames.USER_ADD) || player.hasPermission(PermissionNames.ADMIN_TRUST)|| player.hasPermission(PermissionNames.USER_TRUST)) {
    IWorld world=player.getWorld();
    if (manager.isPlotWorld(world)) {
      PlotMapInfo pmi=manager.getMap(world);
      Plot plot=manager.getPlot(player);
      if (plot == null) {
        player.sendMessage(C("String_Node_Str"));
        return true;
      }
 else {
        UUID playerUniqueId=player.getUniqueId();
        String allowed;
        if (plot.getOwnerId().equals(playerUniqueId) || player.hasPermission(PermissionNames.ADMIN_TRUST) || player.hasPermission(PermissionNames.ADMIN_ADD)) {
          if (args[1].equals("String_Node_Str")) {
            allowed="String_Node_Str";
          }
 else {
            IOfflinePlayer offlinePlayer=serverBridge.getOfflinePlayer(args[1]);
            if (offlinePlayer == null) {
              player.sendMessage("String_Node_Str" + args[1]);
              return true;
            }
 else {
              allowed=offlinePlayer.getUniqueId().toString();
            }
          }
          if (plot.isMember(allowed).isPresent()) {
            double price=0.0;
            PlotRemoveAllowedEvent event=new PlotRemoveAllowedEvent(plot,player,allowed);
            plugin.getEventBus().post(event);
            if (manager.isEconomyEnabled(pmi) && !event.isCancelled()) {
              price=pmi.getRemovePlayerPrice();
              if (serverBridge.has(player,price)) {
                EconomyResponse er=serverBridge.withdrawPlayer(player,price);
                if (!er.transactionSuccess()) {
                  player.sendMessage(er.errorMessage);
                  serverBridge.getLogger().warning(er.errorMessage);
                  return true;
                }
              }
 else {
                player.sendMessage(C("String_Node_Str") + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ serverBridge.getEconomy().get().format(price));
                return true;
              }
            }
            if (!event.isCancelled()) {
              if ("String_Node_Str".equals(allowed)) {
                plot.removeAllMembers();
              }
 else {
                plot.removeMembers(allowed);
              }
              player.sendMessage(C("String_Node_Str") + "String_Node_Str" + args[1]+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ serverBridge.getEconomy().get().format(price));
              if (isAdvancedLogging()) {
                if (price == 0) {
                  serverBridge.getLogger().info(args[1] + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ args[1]+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId());
                }
 else {
                  serverBridge.getLogger().info(args[1] + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ args[1]+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId()+ ("String_Node_Str" + C("String_Node_Str") + "String_Node_Str"+ price));
                }
              }
            }
          }
 else {
            player.sendMessage(C("String_Node_Str") + "String_Node_Str" + args[1]+ "String_Node_Str"+ C("String_Node_Str"));
          }
        }
 else {
          player.sendMessage(C("String_Node_Str") + "String_Node_Str" + plot.getId()+ "String_Node_Str"+ C("String_Node_Str"));
        }
      }
    }
 else {
      player.sendMessage(C("String_Node_Str"));
    }
  }
 else {
    return false;
  }
  return true;
}