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[Frama-c-discuss] Problem with \old

Michael Schausten wrote:
> Hello,
>
> I'm getting started using Frama-c, but now I'm stuck with a (probably 
> simple) problem.
> My code:
>
> /*@ ensures (\old(*p) < *p);
> */
> void fun(int* p) {
>   *p++;
> }
>
> I try to prove it with Alt-Ergo via the GWhy-Tool with
> frama-c -jessie-analysis -jessie-gui fun.c

If you enforce parentheses: (*p)++
then you will get the expected answer.

If you really meant *p++, that is *(p++), then your ensures clause is 
wrong: *p is not modified.


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