How to prevent timeout command to kill?

My process **a.out** is starting by a timeout command similar to:

1 ./a.out - 
It runs on a server and I  have  no control over that because it is part of a shell script that being invoked by the server automatically. 

Is there any possibility or solution that I can implement so that a.out won't get killed until it finishes? 

 - I already mapped signal 15 (SIGTERM) by SIG_IGN macro, so it runs about 5s instead of 1s.
 - If I send SIGKILL to

timeout``` then both gets killed. - Sending SIGSTOP and SIGHUP to timeout seems to have no effect. I searched a lot regarding this matter, but all questions and texts seems to be on timeout usage. Is there anything else I can do? like another signal, forking, preventing timeout to get time correctly, blocking signals, doing something in inline assembly, anything at all? Thank you.