mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-27 02:45:51 +00:00
Code Activity

optimize model pruning

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2012-10-13 16:15:42 -07:00
parent 9828a29b68
commit 0a8be25149
5 changed files with 398 additions and 241 deletions
Download patch file Download diff file Expand all files Collapse all files

25
lib/pdr_util.h
View file

@ -207,10 +207,33 @@ class ternary_model_evaluator : public model_evaluator_base {
ast_fast_mark2 m2;
unsigned m_level1;
unsigned m_level2;
expr_mark m_visited;
void setup_model(expr_ref_vector const& model);
void add_model(expr* e);
void del_model(expr* e);
bool get_assignment(expr* e, expr*& var, expr*& val);
void prune_cone_of_influence(ptr_vector<expr> const & formulas, expr_ref_vector& model);
void prune_by_probing(ptr_vector<expr> const & formulas, expr_ref_vector& model);
//00 -- non-visited
//01 -- X
//10 -- false
//11 -- true
inline bool is_unknown(expr* x) { return !m1.is_marked(x) && !m2.is_marked(x); }
inline void set_unknown(expr* x) { m1.reset_mark(x); m2.reset_mark(x); }
inline bool is_x(expr* x) { return !m1.is_marked(x) && m2.is_marked(x); }
inline bool is_false(expr* x) { return m1.is_marked(x) && !m2.is_marked(x); }
inline bool is_true(expr* x) { return m1.is_marked(x) && m2.is_marked(x); }
inline void set_x(expr* x) { SASSERT(is_unknown(x)); m2.mark(x); }
inline void set_v(expr* x) { SASSERT(is_unknown(x)); m1.mark(x); }
inline void set_false(expr* x) { SASSERT(is_unknown(x)); m1.mark(x); }
inline void set_true(expr* x) { SASSERT(is_unknown(x)); m1.mark(x); m2.mark(x); }
inline void set_bool(expr* x, bool v) { if (v) { set_true(x); } else { set_false(x); } }
inline rational const& get_value(expr* x) const { return m_values.find(x); }
inline void set_value(expr* x, rational const& v) { set_v(x); TRACE("pdr_verbose", tout << mk_pp(x,m) << " " << v << "\n";); m_values.insert(x,v); }
protected:
bool check_model(ptr_vector<expr> const & formulas);
@ -222,6 +245,8 @@ protected:
public:
ternary_model_evaluator(ast_manager& m) : m(m), m_arith(m), m_bv(m) {}
virtual void minimize_model(ptr_vector<expr> const & formulas, expr_ref_vector & model);
void operator()(expr* e) { m_visited.mark(e, true); }
};
void get_value_from_model(const model_core & mdl, func_decl * f, expr_ref& res);