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deps

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-04-14 00:29:58 -07:00
parent 68d7917653
commit 53cc320efa
4 changed files with 21 additions and 23 deletions
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15
src/smt/seq/seq_nielsen.cpp
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@ -43,7 +43,7 @@ NSB review:
namespace seq {
void deps_to_lits(dep_tracker const &deps, svector<enode_pair> &eqs, svector<sat::literal> &lits) {
void deps_to_lits(dep_tracker deps, svector<enode_pair> &eqs, svector<sat::literal> &lits) {
vector<dep_source, false> vs;
dep_manager::s_linearize(deps, vs);
for (dep_source const &d : vs) {
@ -4159,8 +4159,7 @@ namespace seq {
// Concrete character → to_re(unit(c))
expr* te = tok->get_expr();
SASSERT(te);
expr_ref tre(m_seq.re.mk_to_re(te), m);
tok_re = m_sg.mk(tre);
tok_re = m_sg.mk(m_seq.re.mk_to_re(te));
}
else if (tok->is_var()) {
// Variable → intersection of primitive regex constraints, or Σ*
@ -4173,6 +4172,8 @@ namespace seq {
expr_ref all_re(m_seq.re.mk_full_seq(m_seq.re.mk_re(str_sort)), m);
tok_re = m_sg.mk(all_re);
}
TRACE(seq, tout << "intersection-collection\n" << mk_pp(tok->get_expr(), m)
<< "\n" << mk_pp(tok_re->get_expr(), m) << "\n");
}
else if (tok->is_unit()) {
// Symbolic char — try to get char_range
@ -4182,8 +4183,6 @@ namespace seq {
// Build union of re.range for each interval
euf::snode* range_re = nullptr;
for (auto const& r : cs.first.ranges()) {
expr_ref lo(m_seq.mk_char(r.m_lo), m);
expr_ref hi(m_seq.mk_char(r.m_hi - 1), m);
expr_ref rng(m_seq.re.mk_range(
m_seq.str.mk_string(zstring(r.m_lo)),
m_seq.str.mk_string(zstring(r.m_hi - 1))), m);
@ -4221,8 +4220,7 @@ namespace seq {
expr* ae = approx->get_expr();
expr* te = tok_re->get_expr();
SASSERT(ae && te);
expr_ref cat(m_seq.re.mk_concat(ae, te), m);
approx = m_sg.mk(cat);
approx = m_sg.mk(m_seq.re.mk_concat(ae, te));
}
}
@ -4240,7 +4238,8 @@ namespace seq {
// TODO: Minimize the conflict here
lbool result = m_seq_regex->is_empty_bfs(inter_sn, 5000);
TRACE(seq, tout << "widen empty-intersect: " << result << " " << mk_pp(re, m)
<< " <= " << mk_pp(ae, m) << "\n" << mem_pp(m, mem) << "\n");
<< " <= " << mk_pp(ae, m) << "\n" << mem_pp(m, mem) << "\n";
display(tout, &node) << "\n");
return result == l_true;
}