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[Frama-c-discuss] Frama-c-discuss Digest, Vol 63, Issue 2

Hi Jens,

> > int x = 0;
> > 
> > /*@ requires y >= 0;
> >  @ ensures \result > x;
> >  @*/
> > int f(int y) { return y +1; }
> 
> 
> in my opinion the function cannot be verified because the operation y+1 might overflow
> in which case the result can become negative.

Yes, you are right. But my main issue was that - if you use Coq for example - execpt the type of x, nothing is known about its value.
I was looking for a minimal example. You have the same issue with an additional requires y < 10:

-- 
Pierre-Lo?c Garoche
Research Scientist @ ONERA
pierre-loic.garoche at onera.fr - pierre-loic-garoche at uiowa.edu
http://www.onera.fr/staff/pierre-loic-garoche/
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