z3 - After changing from 4.3.2 to 4.4 I get often status UNKNOWN where I got SATISFIABLE or UNSATISFIABLE first -

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my scenario follows:

  • first follow optimistic assumptions well; check assertions without asking unsat core (just using assert).
  • when status unsatisfiable during 1 of tests change strategy , use assertandtrack beginning full unsat core.

with version 4.3.2 works perfectly, after switching 4.4 (stable , latest) z3 returns status unknown (even checks delivered satisfiable in 4.4 without assertandtrack).

does can give me hint how solve problem or further analyze problem?

thanks

christian

for second argument assert-and-track need pass propositional atom or negation of one. not checked in previous versions. may explanation of why seeing different behavior.


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