anchor.diff:  bif(halt, 1) -> true;
   bif(hd, 1) -> true;
   bif(integer_to_list, 1) -> true;
  +bif(integer_to_list, 2) -> true;
   bif(iolist_size, 1) -> true;
   bif(iolist_to_binary, 1) -> true;
   bif(is_alive, 0) -> true;
  
positive.code: bif(max,2) -> true;
  bif(min,2) -> true;
  bif(module_loaded, 1) -> true;
  bif(monitor_node, 2) -> true;
  bif(node, 0) -> true;
  bif(node, 1) -> true;
  
negative.code: bif(list_to_existing_atom, 1) -> true;
  bif(list_to_float, 1) -> true;
  bif(list_to_integer, 1) -> true;
  bif(list_to_integer, 2) -> true;
  bif(list_to_pid, 1) -> true;
  bif(list_to_tuple, 1) -> true;
  bif(load_module, 2) -> true;
  