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Make dep_mgr private in seq_nielsen; expose conflict sources vector (#9129)

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* make dep_mgr private in seq_nielsen, expose conflict_sources vector

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
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* move deps_to_lits to seq namespace in seq_nielsen

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/8d736478-8f9b-4451-8d1f-539ce72525c7

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
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Copilot 2026-03-25 08:05:00 -07:00 • committed by GitHub
parent 49f2eb0e49
commit 46c76d89e0
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6 changed files with 51 additions and 31 deletions
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20
src/smt/seq/seq_nielsen.h
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@ -329,6 +329,11 @@ namespace seq {
// nullptr represents the empty dependency set.
using dep_tracker = dep_manager::dependency*;
// partition dep_source leaves from deps into enode pairs and sat literals.
void deps_to_lits(dep_tracker const& deps,
svector<enode_pair>& eqs,
svector<sat::literal>& lits);
// -----------------------------------------------
// character-level substitution
// mirrors ZIPT's CharSubst
@ -820,9 +825,6 @@ namespace seq {
seq_util& seq() { return m_seq; }
seq_util const& seq() const { return m_seq; }
dep_manager& dep_mgr() { return m_dep_mgr; }
dep_manager const& dep_mgr() const { return m_dep_mgr; }
// node management
nielsen_node* mk_node();
nielsen_node* mk_child(nielsen_node* parent);
@ -907,8 +909,8 @@ namespace seq {
// returns true if at least one child was generated
bool generate_extensions(nielsen_node *node);
// collect dependency information from conflicting constraints
void collect_conflict_deps(dep_tracker& deps) const;
// conflict sources extracted after solve() returns unsat
vector<dep_source, false> const& conflict_sources() const { return m_conflict_sources; }
// explain a conflict: partition the dep_source leaves into str_eq indices
// (kind::eq) and str_mem indices (kind::mem).
@ -952,6 +954,14 @@ namespace seq {
private:
vector<dep_source, false> m_conflict_sources;
dep_manager& dep_mgr() { return m_dep_mgr; }
dep_manager const& dep_mgr() const { return m_dep_mgr; }
// collect dependency information from conflicting constraints
void collect_conflict_deps(dep_tracker& deps) const;
search_result search_dfs(nielsen_node *node, ptr_vector<nielsen_edge>& path);
// Regex widening: overapproximate `str` by replacing variables with