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z3str3: add smt.str.fixed_length_naive_cex option for naive length-based counterexamples

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Murphy Berzish 2020-01-20 15:34:43 -05:00 • committed by Nikolaj Bjorner
parent c1e7d7788e
commit cf3f271f5b
4 changed files with 39 additions and 21 deletions
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10
src/smt/params/theory_str_params.h
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@ -130,6 +130,13 @@ struct theory_str_params {
*/
bool m_FixedLengthRefinement;
/*
* If FixedLengthNaiveCounterexamples is true and the fixed-length equation solver is enabled,
* Z3str3 will only construct simple counterexamples to block unsatisfiable length assignments
* instead of attempting to learn more complex lessons.
*/
bool m_FixedLengthNaiveCounterexamples;
theory_str_params(params_ref const & p = params_ref()):
m_StrongArrangements(true),
m_AggressiveLengthTesting(false),
@ -149,7 +156,8 @@ struct theory_str_params {
m_RegexAutomata_FailedIntersectionThreshold(10),
m_RegexAutomata_LengthAttemptThreshold(10),
m_FixedLengthModels(true),
m_FixedLengthRefinement(false)
m_FixedLengthRefinement(false),
m_FixedLengthNaiveCounterexamples(true)
{
updt_params(p);
}