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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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src/smt/params/smt_params_helper.pyg
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@ -92,6 +92,7 @@ def_module_params(module_name='smt',
('str.regex_automata_length_attempt_threshold', UINT, 10, 'number of length/path constraint attempts before checking unsatisfiability of regex terms'),
('str.fixed_length_models', BOOL, True, 'use fixed-length equation solver to construct models (Z3str3 only)'),
('str.fixed_length_refinement', BOOL, False, 'use abstraction refinement in fixed-length equation solver (Z3str3 only)'),
('str.fixed_length_naive_cex', BOOL, True, 'construct naive counterexamples when fixed-length model construction fails for a given length assignment (Z3str3 only)'),
('core.minimize', BOOL, False, 'minimize unsat core produced by SMT context'),
('core.extend_patterns', BOOL, False, 'extend unsat core with literals that trigger (potential) quantifier instances'),
('core.extend_patterns.max_distance', UINT, UINT_MAX, 'limits the distance of a pattern-extended unsat core'),