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[Frama-c-discuss] Issues with WP on program doing simplepointer arithmetic

  • Subject: [Frama-c-discuss] Issues with WP on program doing simplepointer arithmetic
  • From: Patrick.Baudin at cea.fr (BAUDIN Patrick)
  • Date: Thu, 05 Sep 2013 07:46:22 +0200
  • In-reply-to: <29238_1378304292_r84EIBSm011029_15358548-77DD-4ED7-B160-25FC7B5618F4@cea.fr>
  • References: <CAC3Lx=aO-5GZmk_SOJ1w8=9P=VoXFM0K1Wf7xptVXR1a4YXYwA@mail.gmail.com> <29238_1378304292_r84EIBSm011029_15358548-77DD-4ED7-B160-25FC7B5618F4@cea.fr>
Hi,
In addition, it seems that some of yours loop assigns are incorrects, 
since the content of the stack is also modified.
Patrick.

04/09/2013 16:21, Lo?c Correnson wrote:
> Hi,
>
> It seems that, actually, many proof obligations are missing.
> The simple invariant over variable i is easily discharged on simple 
> goals, but the proof obligation for preservation is missing in your 
> case. There is a dangling node in the internal CFG generated by WP for 
> your code, but don't know why !
>
> Somebody else reported a simiar problem recently, but I can not figure 
> out what is the origin.
> As reported by Dillon, rephrasing the code can help. We are 
> investigating the problem !
>
> L.

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