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Incorrect check-sat result for QF_NIA script #2370

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Heizmann opened this issue Jul 2, 2019 · 2 comments
Closed

Incorrect check-sat result for QF_NIA script #2370

Heizmann opened this issue Jul 2, 2019 · 2 comments

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@Heizmann
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Heizmann commented Jul 2, 2019 •
edited

On the attached example, I incorrectly get a sat response and an invalid model.
LemonRindBug.smt2.txt
Without the push 1 command I would get the expected result.

This problem is absolutely not urgent for us. At the moment we rarely have modulo terms where the second operand is not a constant. I just stumbled upon this problem while developing some examples for a lecture.
NikolajBjorner added a commit that referenced this issue Jul 2, 2019
@NikolajBjorner
separate rewriter used by smt context from asserted formulas to avoid…
db87f2a 
… term substitution, exposed by #2370

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
@NikolajBjorner
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appreciated, it exposed a problem with caching term normalization from the pre-processor that got used during search.

@NikolajBjorner
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I think this was fixed

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@Heizmann @NikolajBjorner