Frama-C-discuss mailing list archives

This page gathers the archives of the old Frama-C-discuss archives, that was hosted by Inria's gforge before its demise at the end of 2020. To search for mails newer than September 2020, please visit the page of the new mailing list on Renater.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Frama-c-discuss] Lemma Selection

Hi,
I understand you want to use the Instance tactic from the GUI, right ?
You shall select a term of the goal that contains a symbol (function, predicate) that appears in the lemma you want to apply.
	L.

> Le 22 janv. 2020 à 20:40, Alexander Bakst <abakst at galois.com> a écrit :
> 
> Hi all,
> 
> I have the following (silly, meaningless) program:
> 
> typedef struct foo_s {
>     int x;
>     int y;
> } foo_t;
> 
> /*@ axiomatic funcs {
>   @   logic int func1(foo_t x);
>   @   logic int func2(int x);
>   @   }
>   @   */
> 
> /*@ lemma foo:
>   @   \forall foo_t f1;
>   @   \forall foo_t f2;
>   @   func1(f2) == func1(f1) ==>
>   @   func1(f1) == func2(func1(f2));
>   @*/
> 
> //@assigns pFoo->x, pFoo->y;
> void boo(foo_t *pFoo);
> 
> //@ requires \valid(pFoo);
> void goo(foo_t *pFoo) {
>     //@ ghost foo_t f = *pFoo;
>  PRE:
>     boo(pFoo);
>     //@ ghost foo_t g = *pFoo;
>     //@ assert func1(f) == func2(func1(g));
> }
> 
> When I load this in the frama-c gui and try to prove the assertion, I’m surprised that I can not select the lemma `foo`. How does frama-c/wp decide which lemmas are related to the term?
> 
> Thanks,
> Alexander
> 
> _______________________________________________
> Frama-c-discuss mailing list
> Frama-c-discuss at lists.gforge.inria.fr
> https://lists.gforge.inria.fr/mailman/listinfo/frama-c-discuss

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.gforge.inria.fr/pipermail/frama-c-discuss/attachments/20200123/736ecedc/attachment.html>