anchor.diff:                  true ->
                       try_timeouts(Port, Timeout div 2)
               end
  -    after Timeout + ?delay ->
  +    after Timeout + 100*?delay ->
                 ct:fail("driver failed to timeout")
       end.
   
  
positive.code:                           Timeout == 0 -> ok;
                            true -> try_cancel(Port, Timeout div 2)
                        end
                after ?delay ->
                          ct:fail("No message from driver")
                end
      end.
  
negative.code:                 true ->
                      try_timeouts(Port, Timeout div 2)
              end
      after Timeout + 100*?delay ->
                ct:fail("driver failed to timeout")
      end.
  
  