--- layout: fc_discuss_archives title: Message 53 from Frama-C-discuss on January 2011 ---
Hi all, Sorry but I have currently very little time to answer on such a question on a specific program Quick guess: Jessie poorly supports arrays embedded in structs and behaves like it was a pointer to another array, e.g. struct S { int a[3] } handle as it was struct S { int *a; } this explains why you need to specify \valid_range(a,0,2) even if it is obvious. Similarly, for two array fields a and b you should say something like forall i ,j 0 <= i <= 3 && 0 <= j <= 3 ==> a+i != b+j to tell that a and b do not point to the same array Hope this helps, - Claude On 01/25/2011 09:20 AM, Arnaud Dieumegard wrote: > Hi all, > > I tried to prove my program without the struct and it succeeded !!! > > Maybe I have to create some logic specification for the struct ? > Or something to help the solver to understand what is on the structure. > > You could find enclosed the new c-code. > > I will now try to add some "structure specification". > > > > > > > Arnaud > > On Jan 24, 2011, at 9:05 PM, David MENTRE wrote: > > >> Hello, >> >> 2011/1/24 David MENTRE<dmentre at linux-france.org>: >> >>> Yes. Please find attached a variation of Arnaud's program that >>> compiles and runs under Jessie. >>> >>> I really don't understand why the assert in the for() loop of function >>> f() (VC 6.) is not proved. >>> >>> I'm using Frama-C Boron with Alt-Ergo 0.91. >>> >> I still cannot prove the assertion with Frama-C Carbon beta 2, Why >> 2.28 and Alt-ergo 0.91[1]. The problem is probably in the assertion >> itself, but I don't see where. >> >> Regards, >> d. >> >> [1] And a slight modification on annotations, see attached C file. >> <dieumegard-case2.c>_______________________________________________ >> Frama-c-discuss mailing list >> Frama-c-discuss at lists.gforge.inria.fr >> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/frama-c-discuss >> > > > Cordialement, > > Arnaud Dieumegard > Research engineer > IRIT / ACADIE > arnaud.dieumegard at enseeiht.fr > > > > > > > _______________________________________________ > Frama-c-discuss mailing list > Frama-c-discuss at lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/frama-c-discuss -- Claude March? | tel: +33 1 72 92 59 69 INRIA Saclay - ?le-de-France | mobile: +33 6 33 14 57 93 Parc Orsay Universit? | fax: +33 1 74 85 42 29 4, rue Jacques Monod - B?timent N | http://www.lri.fr/~marche/ F-91893 ORSAY Cedex |