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add EUF plugin framework.

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plugin setting allows adding equality saturation within the E-graph propagation without involving externalizing theory solver dispatch. It makes equality saturation independent of SAT integration.
Add a special relation operator to support ad-hoc AC symbols.
This commit is contained in:
Nikolaj Bjorner 2023-11-30 13:58:24 -08:00
parent 5784c2da79
commit b52fd8d954
28 changed files with 3063 additions and 68 deletions
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6
src/ast/euf/euf_enode.h
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@ -207,6 +207,7 @@ namespace euf {
enode* get_root() const { return m_root; }
expr* get_expr() const { return m_expr; }
sort* get_sort() const { return m_expr->get_sort(); }
enode* get_interpreted() const { return get_root(); }
app* get_app() const { return to_app(m_expr); }
func_decl* get_decl() const { return is_app(m_expr) ? to_app(m_expr)->get_decl() : nullptr; }
unsigned get_expr_id() const { return m_expr->get_id(); }
@ -216,6 +217,10 @@ namespace euf {
bool children_are_roots() const;
enode* get_next() const { return m_next; }
enode* get_target() const { return m_target; }
justification get_justification() const { return m_justification; }
justification get_lit_justification() const { return m_lit_justification; }
bool has_lbl_hash() const { return m_lbl_hash >= 0; }
unsigned char get_lbl_hash() const {
SASSERT(m_lbl_hash >= 0 && static_cast<unsigned>(m_lbl_hash) < approx_set_traits<unsigned long long>::capacity);
@ -229,6 +234,7 @@ namespace euf {
theory_var get_th_var(theory_id id) const { return m_th_vars.find(id); }
theory_var get_closest_th_var(theory_id id) const;
enode* get_closest_th_node(theory_id id);
bool is_attached_to(theory_id id) const { return get_th_var(id) != null_theory_var; }
bool has_th_vars() const { return !m_th_vars.empty(); }
bool has_one_th_var() const { return !m_th_vars.empty() && !m_th_vars.get_next();}