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Assertion Failure in conflict_resolution::resolve #1233

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aengelke opened this issue Aug 25, 2017 · 0 comments
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Assertion Failure in conflict_resolution::resolve #1233

aengelke opened this issue Aug 25, 2017 · 0 comments
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@NikolajBjorner

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@aengelke
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For some constraint systems (e.g. the attached example) involving sequences, an assertion failure is raised in smt::conflict_resolution::resolve (src/smt/smt_conflict_resolution.cpp:571) using Z3 (master, dca30ab) with the invokation ./build/z3 encoding_gob.encFloat.smt2. This leads to a segmentation fault in release builds. Z3 4.5.0 returns "sat".

System: Ubuntu 16.04, x86-64

Example: encoding_gob.encFloat.smt2.txt (sorry for the size, generated using the Python API)
Backtrace: encoding_gob.encFloat.bt.txt
@NikolajBjorner NikolajBjorner mentioned this issue Aug 28, 2017
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@NikolajBjorner NikolajBjorner self-assigned this Sep 7, 2017
NikolajBjorner added a commit that referenced this issue Nov 21, 2017
@NikolajBjorner
adding instrumentation to debug #1233
33e8113 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
NikolajBjorner added a commit that referenced this issue Nov 21, 2017
@NikolajBjorner
debugging #1233
c5f231a 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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@NikolajBjorner @aengelke