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add pp methods

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-04-13 11:41:49 -07:00
parent 9155ce85bb
commit 035ea95faa
2 changed files with 45 additions and 2 deletions
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8
src/smt/seq/seq_nielsen.cpp
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@ -1085,6 +1085,9 @@ namespace seq {
euf::snode* deriv = fwd
? sg.brzozowski_deriv(mem.m_regex, tok)
: reverse_brzozowski_deriv(sg, mem.m_regex, tok);
TRACE(seq, tout << mk_pp(mem.m_str->get_expr(), m)
<< " in " << mk_pp(mem.m_regex->get_expr(), m)
<< " d: " << mk_pp(deriv->get_expr(), m) << "\n");
if (!deriv)
break;
if (deriv->is_fail()) {
@ -1128,6 +1131,7 @@ namespace seq {
auto next = sg.mk(d);
if (next->is_fail()) {
TRACE(seq, tout << "empty regex" << mk_pp(mem.m_regex->get_expr(), m) << " d: " << d << "\n");
set_general_conflict();
set_conflict(backtrack_reason::regex, mem.m_dep);
return simplify_result::conflict;
@ -1142,6 +1146,7 @@ namespace seq {
// check for regex memberships that are immediately infeasible
for (str_mem& mem : m_str_mem) {
if (mem.is_contradiction()) {
TRACE(seq, tout << "contradiction " << mem_pp(m, mem) << "\n");
set_general_conflict();
set_conflict(backtrack_reason::regex, mem.m_dep);
return simplify_result::conflict;
@ -4253,8 +4258,6 @@ namespace seq {
u_map<std::pair<ptr_vector<euf::snode>, dep_tracker>> var_regexes;
for (auto const& mem : node.str_mems()) {
if (!mem.m_str || !mem.m_regex)
continue;
if (!mem.is_primitive())
continue;
euf::snode* const first = mem.m_str->first();
@ -4270,6 +4273,7 @@ namespace seq {
continue;
lbool result = m_seq_regex->check_intersection_emptiness(regexes.first, 5000);
if (result == l_true) {
TRACE(seq, tout << "empty intersection\n");
// Intersection is empty — infeasible
dep = regexes.second;
return false;