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[Frama-c-discuss] Memory Problems with Lithium
- Subject: [Frama-c-discuss] Memory Problems with Lithium
- From: Christoph.Weber at first.fraunhofer.de (Christoph Weber)
- Date: Tue Nov 4 09:35:55 2008
Hi, I just wanted to add, that next to the bug with preservation of loop invariants, the handling of pointer dereferencing is very annoying. I get the green bullets for this section only if I add loop invariant \valid(it1)&&\valid(it2); That seems very obsolete (at least for a user), i hope this wont be permanent Cheers Christoph On Thu, Oct 30, 2008 at 9:01 AM, Christoph Weber <Christoph.Weber@first.fraunhofer.de> wrote: Hello again, Thank You and granulations for the latest release. But I have some problems to get started. Lets start with an example. Following Function in separate files: fill.h: /*@ requires valid_range(first, last); requires \valid_range(first, 0, last-first -1); behavior is_not_empty: assumes not_empty_range(first, last); ensures \forall integer i; 0 <= i < last-first ==> first[i] == value; */ void fill (int* first, int* last, int value ); fill.c: #include "fill.h" void fill (int* first, int* last, int value ) { int* it = first; /*@ loop invariant first <= it <= last; loop invariant \forall integer k; 0 <= k < it - first ==> first[k] == value; */ while (it != last) *it++ = value; } I call Jessie: frama-c -jessie-analysis -jessie-int-model exact -jessie-no-regions -jessie-gui fill.c Now the problems: -the loop invariant cannot be preserved, => am I missing an option or an annotation (it went fine on H and He) -the declared int* it causes problems in pointer dereferencing -Z3, CVC3, and Yices get stuck and wont abort, the timeout never worked on any release yet (on my pc) I hope for help Cheers _______________________________________________ Frama-c-discuss mailing list Frama-c-discuss@lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/frama-c-discuss -- Yannick -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.gforge.inria.fr/pipermail/frama-c-discuss/attachments/20081104/1ef41b69/attachment.htm
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