anchor.diff:  
   %% @private
   log_dir() ->
  -    root_log_dir() ++ "/" ++ simulation_id().
  +    root_log_dir() ++ "/" ++ simulation_id() ++ "/".
   
   %% @private
   simulation_id() ->
  
positive.code: 
  %% @private
  main_log() ->
      log_dir() ++ "/" ++ main_log_suffix().
  
  %% @private
  main_log_suffix() ->
  
negative.code: 
  %% @private
  overcounting_log() ->
      log_dir() ++ overcounting_log_suffix().
  
  %% @private
  overcounting_log_suffix() ->
  