*To*: cl-isabelle-users at lists.cam.ac.uk*Subject*: Re: [isabelle] Issue with smt and linear arithmetic*From*: Tobias Nipkow <nipkow at in.tum.de>*Date*: Sun, 14 Aug 2016 14:26:33 +0200*In-reply-to*: <20160814103452.62B041C0501@vmmaildmz1.informatik.tu-muenchen.de>*References*: <CAKXUXMwmTGTRa5C-J2_JcEF83mF_22Yd1GUtHBv4eaduVLg=Jg@mail.gmail.com> <20160814103452.62B041C0501@vmmaildmz1.informatik.tu-muenchen.de>*User-agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:45.0) Gecko/20100101 Thunderbird/45.2.0

Tobias On 14/08/2016 12:28, Sascha BÃhme wrote:

Hi Lukas, linarith works as follows: Based on a decomposition of the original problem into a set of linear inequalities, it tries to find a refutation for them. The trace for the refutation is used to replay the steps, which should yield the Theorem False in the end. Proof replay essentially applies the simplifier with a carefully selected simpset. Whenever the final theorem differs from False, the warning you noticed is shown. In your particular case, the obvious simplification for â(2x +2y) / 2â is not performed, because some rule or simproc is missing in linarithâs simpset. Extending the simpset appropriately would be a solution. Iâll see what I can do, such that your issue is resolved in the next release of Isabelle. Cheers, Sascha Von: Lukas Bulwahn

**Attachment:
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**References**:**[isabelle] Issue with smt and linear arithmetic***From:*Lukas Bulwahn

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