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better proof mining for Farkas

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2012-10-12 17:12:43 -07:00
parent 89ca9aa5bd
commit 2087c59084
11 changed files with 227 additions and 103 deletions
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23
lib/pdr_farkas_learner.h
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@ -30,12 +30,10 @@ Revision History:
#include "front_end_params.h"
#include "tactic.h"
namespace pdr {
class farkas_learner {
class farkas_collector;
class asserted_premise_collector;
class constant_replacer_cfg;
class equality_expander_cfg;
class constr;
@ -43,8 +41,7 @@ class farkas_learner {
typedef obj_hashtable<expr> expr_set;
front_end_params m_proof_params;
ast_manager m;
bool_rewriter m_brwr; /** bool rewriter for m_proof_mgr */
ast_manager m_pr;
scoped_ptr<smt::solver> m_ctx;
scoped_ptr<tactic> m_simplifier;
@ -68,10 +65,8 @@ class farkas_learner {
bool try_ensure_lemma_in_language(expr_ref& lemma, expr* A, const func_decl_set& lang);
bool is_farkas_lemma(expr* e);
void get_lemmas(proof* root, expr_set const& bs, func_decl_set const& Bsymbs, expr* A, expr_ref_vector& lemmas);
bool is_farkas_lemma(ast_manager& m, expr* e);
void get_asserted(proof* p, expr_set const& bs, ast_mark& b_closed, expr_ref_vector& lemmas);
void permute_unit_resolution(proof_ref& pr);
@ -82,8 +77,6 @@ class farkas_learner {
static void test();
void simplify_lemmas(expr_ref_vector& lemmas);
public:
farkas_learner(front_end_params& params, ast_manager& m);
@ -100,6 +93,16 @@ public:
bool get_lemma_guesses(expr * A, expr * B, expr_ref_vector& lemmas);
/**
Traverse a proof and retrieve lemmas using the vocabulary from bs.
*/
void get_lemmas(proof* root, expr_set const& bs, expr_ref_vector& lemmas);
/**
\brief Simplify lemmas using subsumption.
*/
void simplify_lemmas(expr_ref_vector& lemmas);
void collect_statistics(statistics& st) const;
static void test(char const* filename);