anchor.diff:  	    io:format("Failed: ~p~n",[Alg]),
   	    io:format("Length ~p ~p~n",[length(Refval), length(Testval)]),
   	    io:format("Head ~p ~p~n",[hd(Refval), hd(Testval)]),
  -	    ok
  +	    exit(wrong_value)
       end.
   
   gen_jump(Algo) ->
  
positive.code: 	    io:format("Failed: ~p~n",[Alg]),
  	    io:format("Length ~p ~p~n",[length(Refval), length(Testval)]),
  	    io:format("Head ~p ~p~n",[hd(Refval), hd(Testval)]),
  	    ok
      end.
  
  gen(Algo) ->
  
negative.code: 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  %% Check if each algorithm generates the proper sequence.
  reference(Config) when is_list(Config) ->
      [reference_1(Alg) || Alg <- algs()],
      ok.
  