mirror of
https://github.com/Z3Prover/z3
synced 2025-04-07 18:05:21 +00:00
wreckfun
This commit is contained in:
parent
612cc5cfba
commit
83f4a006c6
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@ -513,4 +513,39 @@ namespace recfun {
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}
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}
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case_expansion::case_expansion(recfun::util& u, app * n) :
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m_lhs(n, u.m()), m_def(nullptr), m_args(u.m()) {
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SASSERT(u.is_defined(n));
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func_decl * d = n->get_decl();
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m_def = &u.get_def(d);
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m_args.append(n->get_num_args(), n->get_args());
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}
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case_expansion::case_expansion(case_expansion const & from)
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: m_lhs(from.m_lhs),
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m_def(from.m_def),
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m_args(from.m_args) {}
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case_expansion::case_expansion(case_expansion && from)
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: m_lhs(from.m_lhs),
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m_def(from.m_def),
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m_args(std::move(from.m_args)) {}
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std::ostream& case_expansion::display(std::ostream & out) const {
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return out << "case_exp(" << m_lhs << ")";
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}
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std::ostream& body_expansion::display(std::ostream & out) const {
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ast_manager& m = m_pred.m();
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out << "body_exp(" << m_cdef->get_decl()->get_name();
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for (auto* t : m_args)
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out << " " << mk_pp(t, m);
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return out << ")";
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}
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}
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@ -20,6 +20,7 @@ Revision History:
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#pragma once
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#include "ast/ast.h"
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#include "ast/ast_pp.h"
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#include "util/obj_hashtable.h"
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namespace recfun {
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@ -74,7 +75,7 @@ namespace recfun {
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public:
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func_decl* get_decl() const { return m_pred; }
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app_ref apply_case_predicate(ptr_vector<expr> const & args) const {
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app_ref apply_case_predicate(expr_ref_vector const & args) const {
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ast_manager& m = m_pred.get_manager();
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return app_ref(m.mk_app(m_pred, args.size(), args.c_ptr()), m);
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}
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@ -258,6 +259,10 @@ namespace recfun {
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return mk_fun_defined(d, args.size(), args.c_ptr());
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}
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app* mk_fun_defined(def const & d, expr_ref_vector const & args) {
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return mk_fun_defined(d, args.size(), args.c_ptr());
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}
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func_decl_ref_vector get_rec_funs() {
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return m_plugin->get_rec_funs();
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}
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@ -265,5 +270,50 @@ namespace recfun {
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app_ref mk_num_rounds_pred(unsigned d);
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};
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// one case-expansion of `f(t1...tn)`
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struct case_expansion {
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app_ref m_lhs; // the term to expand
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recfun::def * m_def;
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expr_ref_vector m_args;
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case_expansion(recfun::util& u, app * n);
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case_expansion(case_expansion const & from);
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case_expansion(case_expansion && from);
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std::ostream& display(std::ostream& out) const;
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};
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inline std::ostream& operator<<(std::ostream& out, case_expansion const & e) {
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return e.display(out);
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}
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// one body-expansion of `f(t1...tn)` using a `C_f_i(t1...tn)`
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struct body_expansion {
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app_ref m_pred;
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recfun::case_def const * m_cdef;
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expr_ref_vector m_args;
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body_expansion(recfun::util& u, app * n) :
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m_pred(n, u.m()), m_cdef(nullptr), m_args(u.m()) {
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m_cdef = &u.get_case_def(n);
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m_args.append(n->get_num_args(), n->get_args());
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}
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body_expansion(app_ref & pred, recfun::case_def const & d, expr_ref_vector & args) :
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m_pred(pred), m_cdef(&d), m_args(args) {}
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body_expansion(body_expansion const & from):
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m_pred(from.m_pred), m_cdef(from.m_cdef), m_args(from.m_args) {}
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body_expansion(body_expansion && from) :
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m_pred(from.m_pred), m_cdef(from.m_cdef), m_args(std::move(from.m_args)) {}
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std::ostream& display(std::ostream& out) const;
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};
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inline std::ostream& operator<<(std::ostream& out, body_expansion const& e) {
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return e.display(out);
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}
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}
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@ -387,4 +387,25 @@ namespace euf {
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r = m.mk_eq(e1, e2);
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return r;
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}
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unsigned solver::get_max_generation(expr* e) const {
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unsigned g = 0;
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expr_fast_mark1 mark;
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m_todo.push_back(e);
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while (!m_todo.empty()) {
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e = m_todo.back();
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m_todo.pop_back();
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if (mark.is_marked(e))
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continue;
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mark.mark(e);
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euf::enode* n = m_egraph.find(e);
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if (n)
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g = std::max(g, n->generation());
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else if (is_app(e))
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for (expr* arg : *to_app(e))
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m_todo.push_back(arg);
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}
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return g;
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}
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}
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@ -96,6 +96,7 @@ namespace euf {
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user::solver* m_user_propagator{ nullptr };
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th_solver* m_qsolver { nullptr };
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unsigned m_generation { 0 };
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mutable ptr_vector<expr> m_todo;
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ptr_vector<expr> m_bool_var2expr;
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ptr_vector<size_t> m_explain;
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@ -228,6 +229,7 @@ namespace euf {
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s.m_generation = m_g;
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}
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};
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unsigned get_max_generation(expr* e) const;
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// accessors
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@ -213,7 +213,7 @@ namespace q {
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qlit.neg();
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TRACE("q", tout << "project: " << proj << "\n";);
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++m_stats.m_num_instantiations;
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unsigned generation = m_qs.get_max_generation(proj);
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unsigned generation = ctx.get_max_generation(proj);
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m_instantiations.push_back(instantiation_t(qlit, proj, generation));
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}
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@ -207,26 +207,6 @@ namespace q {
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return val;
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}
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unsigned solver::get_max_generation(expr* e) const {
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unsigned g = 0;
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expr_fast_mark1 mark;
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m_todo.push_back(e);
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while (!m_todo.empty()) {
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e = m_todo.back();
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m_todo.pop_back();
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if (mark.is_marked(e))
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continue;
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mark.mark(e);
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euf::enode* n = ctx.get_egraph().find(e);
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if (n)
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g = std::max(g, n->generation());
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else if (is_app(e))
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for (expr* arg : *to_app(e))
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m_todo.push_back(arg);
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}
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return g;
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}
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expr_ref_vector const& solver::expand(quantifier* q) {
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m_expanded.reset();
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if (is_forall(q))
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@ -46,7 +46,6 @@ namespace q {
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flat_table m_flat;
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sat::literal_vector m_universal;
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obj_map<sort, expr*> m_unit_table;
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mutable ptr_vector<expr> m_todo;
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expr_ref_vector m_expanded;
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sat::literal instantiate(quantifier* q, bool negate, std::function<expr* (quantifier*, unsigned)>& mk_var);
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@ -85,6 +84,5 @@ namespace q {
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sat::literal_vector const& universal() const { return m_universal; }
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quantifier* flatten(quantifier* q);
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unsigned get_max_generation(expr* e) const;
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};
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}
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@ -15,10 +15,13 @@ Author:
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--*/
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#include "ast/rewriter/var_subst.h"
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#include "sat/smt/recfun_solver.h"
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#include "sat/smt/euf_solver.h"
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#define TRACEFN(x) TRACE("recfun", tout << x << '\n';)
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namespace recfun {
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@ -29,11 +32,7 @@ namespace recfun {
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m_util(m_plugin.u()),
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m_disabled_guards(m),
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m_enabled_guards(m),
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m_preds(m),
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m_num_rounds(0),
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m_q_case_expand(),
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m_q_body_expand() {
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m_num_rounds = 0;
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m_preds(m) {
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}
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solver::~solver() {
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@ -41,34 +40,140 @@ namespace recfun {
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}
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void solver::reset() {
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reset_queues();
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m_propagation_queue.reset();
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m_stats.reset();
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m_disabled_guards.reset();
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m_enabled_guards.reset();
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m_q_guards.reset();
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m_propagation_queue.reset();
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for (auto & kv : m_guard2pending)
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dealloc(kv.m_value);
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m_guard2pending.reset();
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}
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void solver::reset_queues() {
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for (auto* e : m_q_case_expand) {
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dealloc(e);
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expr_ref solver::apply_args(vars const & vars, expr_ref_vector const & args, expr * e) {
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SASSERT(is_standard_order(vars));
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var_subst subst(m, true);
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expr_ref new_body = subst(e, args);
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ctx.get_rewriter()(new_body);
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return new_body;
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}
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/**
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* For functions f(args) that are given as macros f(vs) = rhs
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*
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* 1. substitute `e.args` for `vs` into the macro rhs
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* 2. add unit clause `f(args) = rhs`
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*/
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void solver::assert_macro_axiom(case_expansion & e) {
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m_stats.m_macro_expansions++;
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SASSERT(e.m_def->is_fun_macro());
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auto & vars = e.m_def->get_vars();
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auto lhs = e.m_lhs;
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auto rhs = apply_args(vars, e.m_args, e.m_def->get_rhs());
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unsigned generation = std::max(ctx.get_max_generation(lhs), ctx.get_max_generation(rhs));
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euf::solver::scoped_generation _sgen(ctx, generation + 1);
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auto eq = eq_internalize(lhs, rhs);
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add_unit(eq);
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}
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/**
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* Add case axioms for every case expansion path.
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*
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* assert `p(args) <=> And(guards)` (with CNF on the fly)
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*
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* also body-expand paths that do not depend on any defined fun
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*/
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void solver::assert_case_axioms(case_expansion & e) {
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SASSERT(e.m_def->is_fun_defined());
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// add case-axioms for all case-paths
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// assert this was not defined before.
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sat::literal_vector preds;
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auto & vars = e.m_def->get_vars();
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for (case_def const & c : e.m_def->get_cases()) {
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// applied predicate to `args`
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app_ref pred_applied = c.apply_case_predicate(e.m_args);
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SASSERT(u().owns_app(pred_applied));
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preds.push_back(mk_literal(pred_applied));
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expr_ref_vector guards(m);
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for (auto & g : c.get_guards())
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guards.push_back(apply_args(vars, e.m_args, g));
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if (c.is_immediate()) {
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body_expansion be(pred_applied, c, e.m_args);
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assert_body_axiom(be);
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}
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else if (!is_enabled_guard(pred_applied)) {
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disable_guard(pred_applied, guards);
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continue;
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}
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activate_guard(pred_applied, guards);
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}
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m_q_case_expand.reset();
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for (auto* e : m_q_body_expand) {
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dealloc(e);
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}
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m_q_body_expand.reset();
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m_q_clauses.clear();
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add_clause(preds);
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}
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void solver::activate_guard(expr* pred_applied, expr_ref_vector const& guards) {
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sat::literal_vector lguards;
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for (expr* ga : guards)
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lguards.push_back(mk_literal(ga));
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add_equiv_and(mk_literal(pred_applied), lguards);
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}
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/**
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* make clause `depth_limit => ~guard`
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* the guard appears at a depth below the current cutoff.
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*/
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void solver::disable_guard(expr* guard, expr_ref_vector const& guards) {
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expr_ref nguard(m.mk_not(guard), m);
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if (is_disabled_guard(nguard))
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return;
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SASSERT(!is_enabled_guard(nguard));
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sat::literal_vector c;
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app_ref dlimit = m_util.mk_num_rounds_pred(m_num_rounds);
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c.push_back(~mk_literal(dlimit));
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c.push_back(~mk_literal(guard));
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m_disabled_guards.push_back(nguard);
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SASSERT(!m_guard2pending.contains(nguard));
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m_guard2pending.insert(nguard, alloc(expr_ref_vector, guards));
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TRACEFN("add clause\n" << c);
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m_propagation_queue.push_back(alloc(propagation_item, c));
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}
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/**
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* For a guarded definition guards => f(vars) = rhs
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* and occurrence f(args)
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*
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* substitute `args` for `vars` in guards, and rhs
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* add axiom guards[args/vars] => f(args) = rhs[args/vars]
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*
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*/
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void solver::assert_body_axiom(body_expansion & e) {
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recfun::def & d = *e.m_cdef->get_def();
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auto & vars = d.get_vars();
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auto & args = e.m_args;
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SASSERT(is_standard_order(vars));
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sat::literal_vector clause;
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for (auto & g : e.m_cdef->get_guards()) {
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expr_ref guard = apply_args(vars, args, g);
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if (m.is_false(guard))
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return;
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if (m.is_true(guard))
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continue;
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clause.push_back(~mk_literal(guard));
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}
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expr_ref lhs(u().mk_fun_defined(d, args), m);
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expr_ref rhs = apply_args(vars, args, e.m_cdef->get_rhs());
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clause.push_back(eq_internalize(lhs, rhs));
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add_clause(clause);
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}
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void solver::get_antecedents(sat::literal l, sat::ext_justification_idx idx, sat::literal_vector& r, bool probing) {
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UNREACHABLE();
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}
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void solver::asserted(sat::literal l) {
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expr* e = ctx.bool_var2expr(l.var());
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if (!l.sign() && u().is_case_pred(e))
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push_body_expand(e);
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}
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sat::check_result solver::check() {
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@ -76,15 +181,18 @@ namespace recfun {
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}
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std::ostream& solver::display(std::ostream& out) const {
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return out;
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return out << "disabled guards:\n" << m_disabled_guards << "\n";
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}
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std::ostream& solver::display_constraint(std::ostream& out, sat::ext_constraint_idx idx) const {
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UNREACHABLE();
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return out;
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}
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void solver::collect_statistics(statistics& st) const {
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st.update("recfun macro expansion", m_stats.m_macro_expansions);
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st.update("recfun case expansion", m_stats.m_case_expansions);
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st.update("recfun body expansion", m_stats.m_body_expansions);
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}
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euf::th_solver* solver::clone(euf::solver& ctx) {
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@ -92,13 +200,107 @@ namespace recfun {
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}
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bool solver::unit_propagate() {
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return false;
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if (m_qhead == m_propagation_queue.size())
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return false;
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ctx.push(value_trail<unsigned>(m_qhead));
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for (; m_qhead < m_propagation_queue.size() && !s().inconsistent(); ++m_qhead) {
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auto& p = *m_propagation_queue[m_qhead];
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if (p.is_guard()) {
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expr* ng = nullptr;
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VERIFY(m.is_not(p.m_guard, ng));
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activate_guard(ng, *m_guard2pending[p.m_guard]);
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}
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else if (p.is_clause()) {
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add_clause(p.m_clause);
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}
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else if (p.is_case()) {
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recfun::case_expansion& e = *p.m_case;
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if (e.m_def->is_fun_macro())
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assert_macro_axiom(e);
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else
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assert_case_axioms(e);
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++m_stats.m_case_expansions;
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}
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else {
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SASSERT(p.is_body());
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assert_body_axiom(*p.m_body);
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++m_stats.m_body_expansions;
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}
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}
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return true;
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}
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sat::literal solver::internalize(expr* e, bool sign, bool root, bool learned) {
|
||||
return sat::null_literal;
|
||||
void solver::push_body_expand(expr* e) {
|
||||
auto* b = alloc(body_expansion, u(), to_app(e));
|
||||
m_propagation_queue.push_back(alloc(propagation_item, b));
|
||||
ctx.push(push_back_vector<scoped_ptr_vector<propagation_item>>(m_propagation_queue));
|
||||
}
|
||||
|
||||
void solver::push_case_expand(expr* e) {
|
||||
auto* c = alloc(case_expansion, u(), to_app(e));
|
||||
m_propagation_queue.push_back(alloc(propagation_item, c));
|
||||
ctx.push(push_back_vector<scoped_ptr_vector<propagation_item>>(m_propagation_queue));
|
||||
}
|
||||
|
||||
sat::literal solver::internalize(expr* e, bool sign, bool root, bool redundant) {
|
||||
SASSERT(m.is_bool(e));
|
||||
if (!visit_rec(m, e, sign, root, redundant)) {
|
||||
TRACE("array", tout << mk_pp(e, m) << "\n";);
|
||||
return sat::null_literal;
|
||||
}
|
||||
auto lit = expr2literal(e);
|
||||
if (sign)
|
||||
lit.neg();
|
||||
return lit;
|
||||
}
|
||||
|
||||
void solver::internalize(expr* e, bool redundant) {
|
||||
visit_rec(m, e, false, false, redundant);
|
||||
}
|
||||
|
||||
bool solver::visited(expr* e) {
|
||||
euf::enode* n = expr2enode(e);
|
||||
return n && n->is_attached_to(get_id());
|
||||
}
|
||||
|
||||
bool solver::visit(expr* e) {
|
||||
if (visited(e))
|
||||
return true;
|
||||
if (!is_app(e) || to_app(e)->get_family_id() != get_id()) {
|
||||
ctx.internalize(e, m_is_redundant);
|
||||
euf::enode* n = expr2enode(e);
|
||||
// TODO ensure_var(n);
|
||||
return true;
|
||||
}
|
||||
m_stack.push_back(sat::eframe(e));
|
||||
return false;
|
||||
}
|
||||
|
||||
bool solver::post_visit(expr* e, bool sign, bool root) {
|
||||
euf::enode* n = expr2enode(e);
|
||||
app* a = to_app(e);
|
||||
SASSERT(!n || !n->is_attached_to(get_id()));
|
||||
if (!n)
|
||||
n = mk_enode(e, false);
|
||||
SASSERT(!n->is_attached_to(get_id()));
|
||||
mk_var(n);
|
||||
#if 0
|
||||
for (auto* arg : euf::enode_args(n))
|
||||
ensure_var(arg);
|
||||
switch (a->get_decl_kind()) {
|
||||
default:
|
||||
UNREACHABLE();
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
if (u().is_defined(e) && u().has_defs())
|
||||
push_case_expand(e);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
|
||||
euf::theory_var solver::mk_var(euf::enode* n) {
|
||||
return euf::null_theory_var;
|
||||
}
|
||||
|
|
|
@ -35,62 +35,6 @@ namespace recfun {
|
|||
void reset() { memset(this, 0, sizeof(stats)); }
|
||||
stats() { reset(); }
|
||||
};
|
||||
|
||||
// one case-expansion of `f(t1...tn)`
|
||||
struct case_expansion {
|
||||
app * m_lhs; // the term to expand
|
||||
recfun::def * m_def;
|
||||
ptr_vector<expr> m_args;
|
||||
case_expansion(recfun::util& u, app * n) :
|
||||
m_lhs(n), m_def(nullptr), m_args() {
|
||||
SASSERT(u.is_defined(n));
|
||||
func_decl * d = n->get_decl();
|
||||
m_def = &u.get_def(d);
|
||||
m_args.append(n->get_num_args(), n->get_args());
|
||||
}
|
||||
case_expansion(case_expansion const & from)
|
||||
: m_lhs(from.m_lhs),
|
||||
m_def(from.m_def),
|
||||
m_args(from.m_args) {}
|
||||
case_expansion(case_expansion && from)
|
||||
: m_lhs(from.m_lhs),
|
||||
m_def(from.m_def),
|
||||
m_args(std::move(from.m_args)) {}
|
||||
};
|
||||
|
||||
struct pp_case_expansion {
|
||||
case_expansion & e;
|
||||
ast_manager & m;
|
||||
pp_case_expansion(case_expansion & e, ast_manager & m) : e(e), m(m) {}
|
||||
};
|
||||
|
||||
friend std::ostream& operator<<(std::ostream&, pp_case_expansion const &);
|
||||
|
||||
// one body-expansion of `f(t1...tn)` using a `C_f_i(t1...tn)`
|
||||
struct body_expansion {
|
||||
app* m_pred;
|
||||
recfun::case_def const * m_cdef;
|
||||
ptr_vector<expr> m_args;
|
||||
|
||||
body_expansion(recfun::util& u, app * n) : m_pred(n), m_cdef(nullptr), m_args() {
|
||||
m_cdef = &u.get_case_def(n);
|
||||
m_args.append(n->get_num_args(), n->get_args());
|
||||
}
|
||||
body_expansion(app* pred, recfun::case_def const & d, ptr_vector<expr> & args) :
|
||||
m_pred(pred), m_cdef(&d), m_args(args) {}
|
||||
body_expansion(body_expansion const & from):
|
||||
m_pred(from.m_pred), m_cdef(from.m_cdef), m_args(from.m_args) {}
|
||||
body_expansion(body_expansion && from) :
|
||||
m_pred(from.m_pred), m_cdef(from.m_cdef), m_args(std::move(from.m_args)) {}
|
||||
};
|
||||
|
||||
struct pp_body_expansion {
|
||||
body_expansion & e;
|
||||
ast_manager & m;
|
||||
pp_body_expansion(body_expansion & e, ast_manager & m) : e(e), m(m) {}
|
||||
};
|
||||
|
||||
friend std::ostream& operator<<(std::ostream&, pp_body_expansion const &);
|
||||
|
||||
recfun::decl::plugin& m_plugin;
|
||||
recfun::util& m_util;
|
||||
|
@ -103,12 +47,44 @@ namespace recfun {
|
|||
obj_map<expr, unsigned> m_pred_depth;
|
||||
expr_ref_vector m_preds;
|
||||
unsigned_vector m_preds_lim;
|
||||
unsigned m_num_rounds;
|
||||
unsigned m_num_rounds { 0 };
|
||||
|
||||
ptr_vector<case_expansion> m_q_case_expand;
|
||||
ptr_vector<body_expansion> m_q_body_expand;
|
||||
vector<sat::literal_vector> m_q_clauses;
|
||||
ptr_vector<expr> m_q_guards;
|
||||
struct propagation_item {
|
||||
case_expansion* m_case { nullptr };
|
||||
body_expansion* m_body { nullptr };
|
||||
sat::literal_vector m_clause;
|
||||
expr* m_guard { nullptr };
|
||||
|
||||
~propagation_item() {
|
||||
dealloc(m_case);
|
||||
dealloc(m_body);
|
||||
}
|
||||
|
||||
propagation_item(expr* guard):
|
||||
m_guard(guard)
|
||||
{}
|
||||
|
||||
propagation_item(sat::literal_vector const& clause):
|
||||
m_clause(clause)
|
||||
{}
|
||||
|
||||
propagation_item(body_expansion* b):
|
||||
m_body(b)
|
||||
{}
|
||||
propagation_item(case_expansion* c):
|
||||
m_case(c)
|
||||
{}
|
||||
|
||||
bool is_guard() const { return m_guard != nullptr; }
|
||||
bool is_clause() const { return !m_clause.empty(); }
|
||||
bool is_case() const { return m_case != nullptr; }
|
||||
bool is_body() const { return m_body != nullptr; }
|
||||
};
|
||||
scoped_ptr_vector<propagation_item> m_propagation_queue;
|
||||
unsigned m_qhead { 0 };
|
||||
|
||||
void push_body_expand(expr* e);
|
||||
void push_case_expand(expr* e);
|
||||
|
||||
bool is_enabled_guard(expr* guard) { expr_ref ng(m.mk_not(guard), m); return m_enabled_guards.contains(ng); }
|
||||
bool is_disabled_guard(expr* guard) { return m_disabled_guards.contains(guard); }
|
||||
|
@ -122,12 +98,10 @@ namespace recfun {
|
|||
|
||||
void activate_guard(expr* guard, expr_ref_vector const& guards);
|
||||
|
||||
void reset_queues();
|
||||
expr_ref apply_args(unsigned depth, recfun::vars const & vars, ptr_vector<expr> const & args, expr * e); //!< substitute variables by args
|
||||
expr_ref apply_args(vars const & vars, expr_ref_vector const & args, expr * e); //!< substitute variables by args
|
||||
void assert_macro_axiom(case_expansion & e);
|
||||
void assert_case_axioms(case_expansion & e);
|
||||
void assert_body_axiom(body_expansion & e);
|
||||
sat::literal mk_literal(expr* e);
|
||||
|
||||
void add_induction_lemmas(unsigned depth);
|
||||
void disable_guard(expr* guard, expr_ref_vector const& guards);
|
||||
|
@ -141,6 +115,10 @@ namespace recfun {
|
|||
}
|
||||
|
||||
void reset();
|
||||
bool visit(expr* e) override;
|
||||
bool visited(expr* e) override;
|
||||
bool post_visit(expr* e, bool sign, bool root) override;
|
||||
|
||||
|
||||
public:
|
||||
|
||||
|
@ -157,7 +135,7 @@ namespace recfun {
|
|||
euf::th_solver* clone(euf::solver& ctx) override;
|
||||
bool unit_propagate() override;
|
||||
sat::literal internalize(expr* e, bool sign, bool root, bool learned) override;
|
||||
void internalize(expr* e, bool redundant) override { UNREACHABLE(); }
|
||||
void internalize(expr* e, bool redundant) override;
|
||||
euf::theory_var mk_var(euf::enode* n) override;
|
||||
void init_search() override;
|
||||
void finalize_model(model& mdl) override;
|
||||
|
|
|
@ -34,10 +34,8 @@ namespace smt {
|
|||
m_disabled_guards(m),
|
||||
m_enabled_guards(m),
|
||||
m_preds(m),
|
||||
m_num_rounds(0),
|
||||
m_q_case_expand(),
|
||||
m_q_body_expand() {
|
||||
m_num_rounds = 0;
|
||||
}
|
||||
|
||||
theory_recfun::~theory_recfun() {
|
||||
|
@ -54,7 +52,6 @@ namespace smt {
|
|||
}
|
||||
|
||||
bool theory_recfun::internalize_atom(app * atom, bool gate_ctx) {
|
||||
force_push();
|
||||
TRACEFN(mk_pp(atom, m));
|
||||
if (!u().has_defs()) {
|
||||
return false;
|
||||
|
@ -70,13 +67,12 @@ namespace smt {
|
|||
ctx.set_var_theory(v, get_id());
|
||||
}
|
||||
if (!ctx.relevancy() && u().is_defined(atom)) {
|
||||
push_case_expand(alloc(case_expansion, u(), atom));
|
||||
push_case_expand(alloc(recfun::case_expansion, u(), atom));
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool theory_recfun::internalize_term(app * term) {
|
||||
force_push();
|
||||
if (!u().has_defs()) {
|
||||
return false;
|
||||
}
|
||||
|
@ -87,7 +83,7 @@ namespace smt {
|
|||
if (!ctx.e_internalized(term)) {
|
||||
ctx.mk_enode(term, false, false, true);
|
||||
if (!ctx.relevancy() && u().is_defined(term)) {
|
||||
push_case_expand(alloc(case_expansion, u(), term));
|
||||
push_case_expand(alloc(recfun::case_expansion, u(), term));
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -128,20 +124,16 @@ namespace smt {
|
|||
SASSERT(ctx.relevancy());
|
||||
TRACEFN("relevant_eh: (defined) " << u().is_defined(n) << " " << mk_pp(n, m));
|
||||
if (u().is_defined(n) && u().has_defs()) {
|
||||
push_case_expand(alloc(case_expansion, u(), n));
|
||||
push_case_expand(alloc(recfun::case_expansion, u(), n));
|
||||
}
|
||||
}
|
||||
|
||||
void theory_recfun::push_scope_eh() {
|
||||
if (lazy_push())
|
||||
return;
|
||||
theory::push_scope_eh();
|
||||
m_preds_lim.push_back(m_preds.size());
|
||||
}
|
||||
|
||||
void theory_recfun::pop_scope_eh(unsigned num_scopes) {
|
||||
if (lazy_pop(num_scopes))
|
||||
return;
|
||||
theory::pop_scope_eh(num_scopes);
|
||||
reset_queues();
|
||||
|
||||
|
@ -189,7 +181,7 @@ namespace smt {
|
|||
m_q_clauses.clear();
|
||||
|
||||
for (unsigned i = 0; i < m_q_case_expand.size(); ++i) {
|
||||
case_expansion* e = m_q_case_expand[i];
|
||||
recfun::case_expansion* e = m_q_case_expand[i];
|
||||
if (e->m_def->is_fun_macro()) {
|
||||
// body expand immediately
|
||||
assert_macro_axiom(*e);
|
||||
|
@ -276,7 +268,7 @@ namespace smt {
|
|||
if (is_true && u().is_case_pred(e)) {
|
||||
TRACEFN("assign_case_pred_true " << mk_pp(e, m));
|
||||
// body-expand
|
||||
push_body_expand(alloc(body_expansion, u(), to_app(e)));
|
||||
push_body_expand(alloc(recfun::body_expansion, u(), to_app(e)));
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -284,12 +276,12 @@ namespace smt {
|
|||
expr_ref theory_recfun::apply_args(
|
||||
unsigned depth,
|
||||
recfun::vars const & vars,
|
||||
ptr_vector<expr> const & args,
|
||||
expr_ref_vector const & args,
|
||||
expr * e) {
|
||||
SASSERT(is_standard_order(vars));
|
||||
var_subst subst(m, true);
|
||||
expr_ref new_body(m);
|
||||
new_body = subst(e, args.size(), args.c_ptr());
|
||||
new_body = subst(e, args);
|
||||
ctx.get_rewriter()(new_body); // simplify
|
||||
set_depth_rec(depth + 1, new_body);
|
||||
return new_body;
|
||||
|
@ -329,9 +321,9 @@ namespace smt {
|
|||
* 1. substitute `e.args` for `vs` into the macro rhs
|
||||
* 2. add unit clause `f(args) = rhs`
|
||||
*/
|
||||
void theory_recfun::assert_macro_axiom(case_expansion & e) {
|
||||
void theory_recfun::assert_macro_axiom(recfun::case_expansion & e) {
|
||||
m_stats.m_macro_expansions++;
|
||||
TRACEFN("case expansion " << pp_case_expansion(e, m));
|
||||
TRACEFN("case expansion " << e);
|
||||
SASSERT(e.m_def->is_fun_macro());
|
||||
auto & vars = e.m_def->get_vars();
|
||||
expr_ref lhs(e.m_lhs, m);
|
||||
|
@ -351,8 +343,8 @@ namespace smt {
|
|||
*
|
||||
* also body-expand paths that do not depend on any defined fun
|
||||
*/
|
||||
void theory_recfun::assert_case_axioms(case_expansion & e) {
|
||||
TRACEFN("assert_case_axioms "<< pp_case_expansion(e,m)
|
||||
void theory_recfun::assert_case_axioms(recfun::case_expansion & e) {
|
||||
TRACEFN("assert_case_axioms " << e
|
||||
<< " with " << e.m_def->get_cases().size() << " cases");
|
||||
SASSERT(e.m_def->is_fun_defined());
|
||||
// add case-axioms for all case-paths
|
||||
|
@ -375,7 +367,7 @@ namespace smt {
|
|||
guards.push_back(apply_args(depth, vars, e.m_args, g));
|
||||
}
|
||||
if (c.is_immediate()) {
|
||||
body_expansion be(pred_applied, c, e.m_args);
|
||||
recfun::body_expansion be(pred_applied, c, e.m_args);
|
||||
assert_body_axiom(be);
|
||||
}
|
||||
else if (!is_enabled_guard(pred_applied)) {
|
||||
|
@ -392,13 +384,6 @@ namespace smt {
|
|||
ctx.mk_th_axiom(get_id(), preds);
|
||||
}
|
||||
(void)max_depth;
|
||||
// add_induction_lemmas(max_depth);
|
||||
}
|
||||
|
||||
void theory_recfun::add_induction_lemmas(unsigned depth) {
|
||||
if (depth > 4 && ctx.get_fparams().m_induction && induction::should_try(ctx)) {
|
||||
ctx.get_induction()();
|
||||
}
|
||||
}
|
||||
|
||||
void theory_recfun::activate_guard(expr* pred_applied, expr_ref_vector const& guards) {
|
||||
|
@ -426,7 +411,7 @@ namespace smt {
|
|||
* add axiom guards[args/vars] => f(args) = rhs[args/vars]
|
||||
*
|
||||
*/
|
||||
void theory_recfun::assert_body_axiom(body_expansion & e) {
|
||||
void theory_recfun::assert_body_axiom(recfun::body_expansion & e) {
|
||||
recfun::def & d = *e.m_cdef->get_def();
|
||||
auto & vars = d.get_vars();
|
||||
auto & args = e.m_args;
|
||||
|
@ -439,7 +424,7 @@ namespace smt {
|
|||
expr_ref guard = apply_args(depth, vars, args, g);
|
||||
clause.push_back(~mk_literal(guard));
|
||||
if (clause.back() == true_literal) {
|
||||
TRACEFN("body " << pp_body_expansion(e,m) << "\n" << clause << "\n" << guard);
|
||||
TRACEFN("body " << e << "\n" << clause << "\n" << guard);
|
||||
return;
|
||||
}
|
||||
if (clause.back() == false_literal) {
|
||||
|
@ -450,7 +435,7 @@ namespace smt {
|
|||
std::function<literal_vector(void)> fn = [&]() { return clause; };
|
||||
scoped_trace_stream _tr(*this, fn);
|
||||
ctx.mk_th_axiom(get_id(), clause);
|
||||
TRACEFN("body " << pp_body_expansion(e,m));
|
||||
TRACEFN("body " << e);
|
||||
TRACEFN(pp_lits(ctx, clause));
|
||||
}
|
||||
|
||||
|
@ -521,15 +506,4 @@ namespace smt {
|
|||
st.update("recfun body expansion", m_stats.m_body_expansions);
|
||||
}
|
||||
|
||||
std::ostream& operator<<(std::ostream & out, theory_recfun::pp_case_expansion const & e) {
|
||||
return out << "case_exp(" << mk_pp(e.e.m_lhs, e.m) << ")";
|
||||
}
|
||||
|
||||
std::ostream& operator<<(std::ostream & out, theory_recfun::pp_body_expansion const & e) {
|
||||
out << "body_exp(" << e.e.m_cdef->get_decl()->get_name();
|
||||
for (auto* t : e.e.m_args) {
|
||||
out << " " << mk_pp(t,e.m);
|
||||
}
|
||||
return out << ")";
|
||||
}
|
||||
}
|
||||
|
|
|
@ -31,62 +31,6 @@ namespace smt {
|
|||
void reset() { memset(this, 0, sizeof(stats)); }
|
||||
stats() { reset(); }
|
||||
};
|
||||
|
||||
// one case-expansion of `f(t1...tn)`
|
||||
struct case_expansion {
|
||||
app * m_lhs; // the term to expand
|
||||
recfun::def * m_def;
|
||||
ptr_vector<expr> m_args;
|
||||
case_expansion(recfun::util& u, app * n) :
|
||||
m_lhs(n), m_def(nullptr), m_args() {
|
||||
SASSERT(u.is_defined(n));
|
||||
func_decl * d = n->get_decl();
|
||||
m_def = &u.get_def(d);
|
||||
m_args.append(n->get_num_args(), n->get_args());
|
||||
}
|
||||
case_expansion(case_expansion const & from)
|
||||
: m_lhs(from.m_lhs),
|
||||
m_def(from.m_def),
|
||||
m_args(from.m_args) {}
|
||||
case_expansion(case_expansion && from)
|
||||
: m_lhs(from.m_lhs),
|
||||
m_def(from.m_def),
|
||||
m_args(std::move(from.m_args)) {}
|
||||
};
|
||||
|
||||
struct pp_case_expansion {
|
||||
case_expansion & e;
|
||||
ast_manager & m;
|
||||
pp_case_expansion(case_expansion & e, ast_manager & m) : e(e), m(m) {}
|
||||
};
|
||||
|
||||
friend std::ostream& operator<<(std::ostream&, pp_case_expansion const &);
|
||||
|
||||
// one body-expansion of `f(t1...tn)` using a `C_f_i(t1...tn)`
|
||||
struct body_expansion {
|
||||
app* m_pred;
|
||||
recfun::case_def const * m_cdef;
|
||||
ptr_vector<expr> m_args;
|
||||
|
||||
body_expansion(recfun::util& u, app * n) : m_pred(n), m_cdef(nullptr), m_args() {
|
||||
m_cdef = &u.get_case_def(n);
|
||||
m_args.append(n->get_num_args(), n->get_args());
|
||||
}
|
||||
body_expansion(app* pred, recfun::case_def const & d, ptr_vector<expr> & args) :
|
||||
m_pred(pred), m_cdef(&d), m_args(args) {}
|
||||
body_expansion(body_expansion const & from):
|
||||
m_pred(from.m_pred), m_cdef(from.m_cdef), m_args(from.m_args) {}
|
||||
body_expansion(body_expansion && from) :
|
||||
m_pred(from.m_pred), m_cdef(from.m_cdef), m_args(std::move(from.m_args)) {}
|
||||
};
|
||||
|
||||
struct pp_body_expansion {
|
||||
body_expansion & e;
|
||||
ast_manager & m;
|
||||
pp_body_expansion(body_expansion & e, ast_manager & m) : e(e), m(m) {}
|
||||
};
|
||||
|
||||
friend std::ostream& operator<<(std::ostream&, pp_body_expansion const &);
|
||||
|
||||
recfun::decl::plugin& m_plugin;
|
||||
recfun::util& m_util;
|
||||
|
@ -99,10 +43,10 @@ namespace smt {
|
|||
obj_map<expr, unsigned> m_pred_depth;
|
||||
expr_ref_vector m_preds;
|
||||
unsigned_vector m_preds_lim;
|
||||
unsigned m_num_rounds;
|
||||
unsigned m_num_rounds { 0 };
|
||||
|
||||
ptr_vector<case_expansion> m_q_case_expand;
|
||||
ptr_vector<body_expansion> m_q_body_expand;
|
||||
ptr_vector<recfun::case_expansion> m_q_case_expand;
|
||||
ptr_vector<recfun::body_expansion> m_q_body_expand;
|
||||
vector<literal_vector> m_q_clauses;
|
||||
ptr_vector<expr> m_q_guards;
|
||||
|
||||
|
@ -119,13 +63,12 @@ namespace smt {
|
|||
void activate_guard(expr* guard, expr_ref_vector const& guards);
|
||||
|
||||
void reset_queues();
|
||||
expr_ref apply_args(unsigned depth, recfun::vars const & vars, ptr_vector<expr> const & args, expr * e); //!< substitute variables by args
|
||||
void assert_macro_axiom(case_expansion & e);
|
||||
void assert_case_axioms(case_expansion & e);
|
||||
void assert_body_axiom(body_expansion & e);
|
||||
expr_ref apply_args(unsigned depth, recfun::vars const & vars, expr_ref_vector const & args, expr * e); //!< substitute variables by args
|
||||
void assert_macro_axiom(recfun::case_expansion & e);
|
||||
void assert_case_axioms(recfun::case_expansion & e);
|
||||
void assert_body_axiom(recfun::body_expansion & e);
|
||||
literal mk_literal(expr* e);
|
||||
|
||||
void add_induction_lemmas(unsigned depth);
|
||||
void disable_guard(expr* guard, expr_ref_vector const& guards);
|
||||
unsigned get_depth(expr* e);
|
||||
void set_depth(unsigned d, expr* e);
|
||||
|
@ -136,8 +79,8 @@ namespace smt {
|
|||
return vars.empty() || vars[vars.size()-1]->get_idx() == 0;
|
||||
}
|
||||
protected:
|
||||
void push_case_expand(case_expansion* e) { m_q_case_expand.push_back(e); }
|
||||
void push_body_expand(body_expansion* e) { m_q_body_expand.push_back(e); }
|
||||
void push_case_expand(recfun::case_expansion* e) { m_q_case_expand.push_back(e); }
|
||||
void push_body_expand(recfun::body_expansion* e) { m_q_body_expand.push_back(e); }
|
||||
|
||||
bool internalize_atom(app * atom, bool gate_ctx) override;
|
||||
bool internalize_term(app * term) override;
|
||||
|
|
Loading…
Reference in a new issue