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[Frama-c-discuss] Small function with Shifting
- Subject: [Frama-c-discuss] Small function with Shifting
- From: Claude.Marche at inria.fr (Claude Marche)
- Date: Thu, 20 May 2010 15:36:38 +0200
- In-reply-to: <1274361797.2116.11.camel@iti27>
- References: <4BF51BEB.6040205@googlemail.com> <4BF5209A.4040402@inria.fr> <1274361797.2116.11.camel@iti27>
Boris Hollas wrote: > On Thu, 2010-05-20 at 13:44 +0200, Claude Marche wrote: > > >> The lemma itself is not proved of course, you have to convince yourself >> of its truth by other means: from human review to use of a proof assistant. >> > > Does that mean that Jessie/why doesn't prove a user supplied lemma? It generates a proof obligation for it, of course. If some automatic provers proves it you are happy, if not and if you are brave, you can use a proof assistant (and if you are not brave enough, try to convince yourself that it is true anyway) > The > ACSL reference is unclear on this, it states "Of course, a complete > verification of an ACSL specification has to provide a proof for each > lemma." It's unclear to me who has to provide this proof. > Quite a philosophical question, indeed ;-) Let me remind the main "theorem" behind the Jessie/Why plugin: if all the proof obligations are valid formulas, then the code satisfies its ACSL annotations. It does not tell you anything about who is going to guarantee that they are valid! - Claude -- 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 |
- References:
- [Frama-c-discuss] Small function with Shifting
- From: michaelschausten at googlemail.com (Michael Schausten)
- [Frama-c-discuss] Small function with Shifting
- From: Claude.Marche at inria.fr (Claude Marche)
- [Frama-c-discuss] Small function with Shifting
- From: hollas at informatik.htw-dresden.de (Boris Hollas)
- [Frama-c-discuss] Small function with Shifting
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