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fix regressions during string fixes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-08-25 10:00:26 +01:00
parent 0d9cd7bc2b
commit 64f4c9794d
1 changed files with 13 additions and 0 deletions
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13
src/smt/theory_seq.cpp
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@ -6044,6 +6044,12 @@ void theory_seq::propagate_not_prefix(expr* e) {
VERIFY(m_util.str.is_prefix(e, e1, e2));
literal lit = ctx.get_literal(e);
SASSERT(ctx.get_assignment(lit) == l_false);
dependency * deps = nullptr;
expr_ref cont = canonize(e, deps);
if (m.is_true(cont)) {
propagate_lit(deps, 0, nullptr, lit);
return;
}
propagate_non_empty(~lit, e1);
literal e1_gt_e2 = mk_simplified_literal(m_autil.mk_ge(mk_sub(mk_len(e1), mk_len(e2)), m_autil.mk_int(1)));
sort* char_sort = nullptr;
@ -6070,6 +6076,13 @@ void theory_seq::propagate_not_suffix(expr* e) {
VERIFY(m_util.str.is_suffix(e, e1, e2));
literal lit = ctx.get_literal(e);
SASSERT(ctx.get_assignment(lit) == l_false);
dependency * deps = nullptr;
expr_ref cont = canonize(e, deps);
if (m.is_true(cont)) {
propagate_lit(deps, 0, nullptr, lit);
return;
}
propagate_non_empty(~lit, e1);
literal e1_gt_e2 = mk_simplified_literal(m_autil.mk_ge(mk_sub(mk_len(e1), mk_len(e2)), m_autil.mk_int(1)));
sort* char_sort = nullptr;