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[Frama-c-discuss] Small function with Shifting
- Subject: [Frama-c-discuss] Small function with Shifting
- From: virgile.prevosto at cea.fr (Virgile Prevosto)
- Date: Thu, 20 May 2010 15:30:57 +0200
- In-reply-to: <1274361797.2116.11.camel@iti27>
- References: <4BF51BEB.6040205@googlemail.com> <4BF5209A.4040402@inria.fr> <1274361797.2116.11.camel@iti27>
Le jeu. 20 mai 2010 15:23:17 CEST, Boris Hollas <hollas at informatik.htw-dresden.de> a ?crit : > > > 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? 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. > No, jessie always generates a proof obligation corresponding to the lemma. However, no automated prover will be able to discharge it (otherwise, they would prove the PO from the ensures clause directly). Thus, some additional work is needed (e.g. by using the coq output of why). -- E tutto per oggi, a la prossima volta. Virgile
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