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z3str3: assert precondition for regex linearity axiom

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Murphy Berzish 2020-02-13 14:43:09 -05:00 committed by Nikolaj Bjorner
parent 0146259ea4
commit 85fd139c7f
1 changed files with 2 additions and 1 deletions
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src/smt/theory_str_regex.cpp
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@ -93,7 +93,8 @@ namespace smt {
// generate new length constraint
expr_ref_vector extra_length_vars(m);
expr_ref _top_level_length_constraint = infer_all_regex_lengths(mk_strlen(str), re, extra_length_vars);
expr_ref top_level_length_constraint(_top_level_length_constraint, m);
expr_ref premise(str_in_re, m);
expr_ref top_level_length_constraint(m.mk_implies(premise, _top_level_length_constraint), m);
th_rewriter rw(m);
rw(top_level_length_constraint);
TRACE("str", tout << "top-level length constraint: " << mk_pp(top_level_length_constraint, m) << std::endl;);