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hoist co-factors eagerly without adding axioms

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-25 15:10:45 -07:00
parent e938ee33bb
commit a97bc65af4
6 changed files with 94 additions and 68 deletions
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6
src/smt/theory_seq.cpp
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@ -3493,8 +3493,10 @@ bool theory_seq::should_research(expr_ref_vector & unsat_core) {
}
if (k_min < UINT_MAX) {
m_max_unfolding_depth++;
IF_VERBOSE(1, verbose_stream() << "(smt.seq :increase-length " << mk_pp(s_min, m) << " " << 2*k_min << ")\n");
add_length_limit(s_min, 2*k_min, false);
k_min *= 2;
k_min = std::max(m_util.str.min_length(s_min), k_min);
IF_VERBOSE(1, verbose_stream() << "(smt.seq :increase-length " << mk_pp(s_min, m) << " " << k_min << ")\n");
add_length_limit(s_min, k_min, false);
return true;
}
else if (has_max_unfolding) {