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Horn logic soundness bug #3872

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wintered opened this issue Apr 8, 2020 · 0 comments
Closed

Horn logic soundness bug #3872

wintered opened this issue Apr 8, 2020 · 0 comments

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@wintered
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wintered commented Apr 8, 2020 

[649] % z3 small.smt2
sat
unsat
[650] % 
[650] % cat small.smt2
(assert
 (exists ((a Real))
 (forall ((b Real))
  (xor (< b 0.0)
  (> b (mod (to_int b) (to_int 0.0)))))))
(check-sat)
(check-sat-using horn)
[651] %

OS: Ubuntu 18.04
Commit: 6e8d900
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@wintered