Program: 41946
Project: 41946
Buggy source:
public boolean execute(ICommandSender sender,String[] args){
  if (args.length < 2 && args.length >= 3) {
    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_DENY) || player.hasPermission(PermissionNames.USER_DENY)) {
    IWorld world=player.getWorld();
    if (manager.isPlotWorld(world)) {
      Plot plot=manager.getPlot(player);
      if (plot == null) {
        player.sendMessage(C("String_Node_Str"));
        return true;
      }
      PlotMapInfo pmi=manager.getMap(world);
      String denied=args[1];
      if (player.getUniqueId().equals(plot.getOwnerId()) || player.hasPermission(PermissionNames.ADMIN_DENY)) {
        if ("String_Node_Str".equals(denied)) {
          return undenyAll(plot,player,pmi);
        }
        IOfflinePlayer offlinePlayer=serverBridge.getOfflinePlayer(denied);
        if (offlinePlayer == null) {
          player.sendMessage("String_Node_Str" + denied);
          return true;
        }
 else {
          denied=offlinePlayer.getUniqueId().toString();
        }
        if (plot.isDenied(denied)) {
          double price=0.0;
          PlotRemoveDeniedEvent event=new PlotRemoveDeniedEvent(plot,player,denied);
          if (manager.isEconomyEnabled(pmi)) {
            price=pmi.getUndenyPlayerPrice();
            if (serverBridge.has(player,price)) {
              plugin.getEventBus().post(event);
              if (event.isCancelled()) {
                return true;
              }
 else {
                EconomyResponse er=serverBridge.withdrawPlayer(player,price);
                if (!er.transactionSuccess()) {
                  player.sendMessage(er.errorMessage);
                  serverBridge.getLogger().warning(er.errorMessage);
                  return true;
                }
              }
            }
 else {
              player.sendMessage("String_Node_Str" + serverBridge.getEconomy().get().format(price) + "String_Node_Str"+ "String_Node_Str");
              return true;
            }
          }
 else {
            plugin.getEventBus().post(event);
          }
          if (!event.isCancelled()) {
            plot.removeDenied(denied);
            plugin.getSqlManager().savePlot(plot);
            player.sendMessage(C("String_Node_Str") + "String_Node_Str" + denied+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ serverBridge.getEconomy().get().format(price));
            if (isAdvancedLogging()) {
              if (price != 0) {
                serverBridge.getLogger().info(player.getName() + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ denied+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId().getID()+ ("String_Node_Str" + C("String_Node_Str") + "String_Node_Str"+ price));
              }
 else {
                serverBridge.getLogger().info(player.getName() + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ denied+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId().getID());
              }
            }
          }
        }
 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().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) {
    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_DENY) || player.hasPermission(PermissionNames.USER_DENY)) {
    IWorld world=player.getWorld();
    if (manager.isPlotWorld(world)) {
      Plot plot=manager.getPlot(player);
      if (plot == null) {
        player.sendMessage(C("String_Node_Str"));
        return true;
      }
      PlotMapInfo pmi=manager.getMap(world);
      String denied=args[1];
      if (player.getUniqueId().equals(plot.getOwnerId()) || player.hasPermission(PermissionNames.ADMIN_DENY)) {
        if ("String_Node_Str".equals(denied)) {
          return undenyAll(plot,player,pmi);
        }
        IOfflinePlayer offlinePlayer=serverBridge.getOfflinePlayer(denied);
        if (offlinePlayer == null) {
          player.sendMessage("String_Node_Str" + args[1]);
          return true;
        }
 else {
          denied=offlinePlayer.getUniqueId().toString();
        }
        if (plot.isDenied(denied)) {
          double price=0.0;
          PlotRemoveDeniedEvent event=new PlotRemoveDeniedEvent(plot,player,denied);
          if (manager.isEconomyEnabled(pmi)) {
            price=pmi.getUndenyPlayerPrice();
            if (serverBridge.has(player,price)) {
              plugin.getEventBus().post(event);
              if (event.isCancelled()) {
                return true;
              }
 else {
                EconomyResponse er=serverBridge.withdrawPlayer(player,price);
                if (!er.transactionSuccess()) {
                  player.sendMessage(er.errorMessage);
                  serverBridge.getLogger().warning(er.errorMessage);
                  return true;
                }
              }
            }
 else {
              player.sendMessage("String_Node_Str" + serverBridge.getEconomy().get().format(price) + "String_Node_Str"+ "String_Node_Str");
              return true;
            }
          }
 else {
            plugin.getEventBus().post(event);
          }
          if (!event.isCancelled()) {
            plot.removeDenied(denied);
            plugin.getSqlManager().savePlot(plot);
            player.sendMessage(C("String_Node_Str") + "String_Node_Str" + denied+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ serverBridge.getEconomy().get().format(price));
            if (isAdvancedLogging()) {
              if (price != 0) {
                serverBridge.getLogger().info(player.getName() + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ args[1]+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId().getID()+ ("String_Node_Str" + C("String_Node_Str") + "String_Node_Str"+ price));
              }
 else {
                serverBridge.getLogger().info(player.getName() + "String_Node_Str" + C("String_Node_Str")+ "String_Node_Str"+ args[1]+ "String_Node_Str"+ C("String_Node_Str")+ "String_Node_Str"+ plot.getId().getID());
              }
            }
          }
        }
 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().getID()+ "String_Node_Str"+ C("String_Node_Str"));
      }
    }
 else {
      player.sendMessage(C("String_Node_Str"));
    }
  }
 else {
    return false;
  }
  return true;
}