--- layout: fc_discuss_archives title: Message 6 from Frama-C-discuss on May 2013 ---
Hi, it's interesting that you mention you can prove it with z3. In my experience with the WP plugin, I cant prove anything with Z3 (4.3.2) save one or other random PO. I usually rely on CVC3 (2.4.1) 2013/5/6 Lo?c Correnson <loic.correnson at cea.fr> > Thanks for the report. > > It's seems to be related to a problem in alt-ergo with the record theory : > the addition of the helper assertions trigger more fact on record > comparisons. > Without these helpers, alt-ergo give up very quickly (less than 1s), which > can be a sign of incompleteness. > Goals are proven with Z3, though. > > Regarding cvc3, it is indeed a why3 issue, if any. > L. > > > Le 4 mai 2013 ? 19:07, Cristiano Sousa a ?crit : > > Hi, > > I'm having a odd problem with proving a simple contract with the WP > plugin. I'm forced to insert the assertions HELPER and HELPER2 in order to > discharge all POs, when in the Oxygen release I didn't need this kind of > assertions. Without HELPER, BOUND cannot be proved and without HELPER2 the > post condition cannot be proved. Note: the rest of the assertions were > inserted to help me pinpoint the problem. > > http://pastebin.com/p5AdPN2n > > Also, in the previous release of frama-c there was a problem with cvc3 > processes not being killed. This problem now happens more ofter but i'm > guessing this is a problem related to why and not frama-c. > > Thanks! > _______________________________________________ > 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 > > > > _______________________________________________ > 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 > -- Cumprimentos, Cristiano Sousa -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.gforge.inria.fr/pipermail/frama-c-discuss/attachments/20130507/d581cd37/attachment.html>