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--check-unsat-cores fatal failure at CVC4/src/theory/theory_model_builder.cpp:797 #3813

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muchang opened this issue Feb 25, 2020 · 0 comments · Fixed by #3843
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--check-unsat-cores fatal failure at CVC4/src/theory/theory_model_builder.cpp:797 #3813

muchang opened this issue Feb 25, 2020 · 0 comments · Fixed by #3843
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muchang commented Feb 25, 2020

Hi,
For this formula:

(declare-fun a () (Array Int Bool))
(declare-fun b () (Array Int Bool))
(assert (= a (store b 0 true)))
(check-sat)

CVC4 --check-unsat-cores throws out a fatal failure:

Fatal failure within virtual bool CVC4::theory::TheoryEngineModelBuilder::buildModel(CVC4::Model*) at CVC4/src/theory/theory_model_builder.cpp:797
Check failure
 !t.isBoolean() || (*i2).isVar() || (*i2).getKind() == kind::APPLY_UF
Aborted

OS: Ubuntu 18.04
Commit: 6e17dd6
@ajreynol ajreynol added bug minor Priority and removed minor Priority labels Feb 25, 2020
@ajreynol ajreynol self-assigned this Feb 25, 2020
@ajreynol ajreynol mentioned this issue Feb 28, 2020
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aniemetz pushed a commit that referenced this issue Feb 29, 2020
@ajreynol
Fix assertion related to assignability in the model. (#3843)
4ac14c0 
Fixes #3813.

It appears that an assertion was hardcoded to check whether a term was a variable or APPLY_UF application whereas this check should use isAssignable. This avoids an assertion failure on the given benchmark.
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Fix assertion related to isAssignable ajreynol/CVC4
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@ajreynol @muchang