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fix #4073

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-23 11:40:16 -07:00
parent 50d58114cf
commit 8f297666fe
1 changed files with 8 additions and 7 deletions
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15
src/smt/theory_seq.cpp
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@ -3000,19 +3000,20 @@ void theory_seq::assign_eh(bool_var v, bool is_true) {
return;
}
expr_ref se1(e1, m), se2(e2, m);
m_rewrite(se1);
m_rewrite(se2);
if (is_true) {
expr_ref f1 = m_sk.mk_indexof_left(e1, e2);
expr_ref f2 = m_sk.mk_indexof_right(e1, e2);
f = mk_concat(f1, e2, f2);
expr_ref f1 = m_sk.mk_indexof_left(se1, se2);
expr_ref f2 = m_sk.mk_indexof_right(se1, se2);
f = mk_concat(f1, se2, f2);
propagate_eq(lit, f, e1, true);
//literal len2_le_len1 = mk_simplified_literal(m_autil.mk_ge(mk_sub(mk_len(e1), mk_len(e2)), m_autil.mk_int(0)));
//add_axiom(~lit, len2_le_len1);
}
else {
propagate_non_empty(lit, e2);
propagate_non_empty(lit, se2);
dependency* dep = m_dm.mk_leaf(assumption(lit));
// |e1| - |e2| <= -1
literal len_gt = m_ax.mk_le(mk_sub(mk_len(e1), mk_len(e2)), -1);
literal len_gt = m_ax.mk_le(mk_sub(mk_len(se1), mk_len(se2)), -1);
ctx.force_phase(len_gt);
m_ncs.push_back(nc(expr_ref(e, m), len_gt, dep));
}