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working on expansion

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2012-10-17 08:34:42 -07:00
parent 3a837037d4
commit 8459401b6e
7 changed files with 198 additions and 212 deletions
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10
lib/pdr_util.h
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@ -214,6 +214,9 @@ class ternary_model_evaluator : public model_evaluator_base {
void del_model(expr* e);
bool get_assignment(expr* e, expr*& var, expr*& val);
void collect(ptr_vector<expr> const& formulas, ptr_vector<expr>& tocollect);
void process_formula(app* e, ptr_vector<expr> todo, ptr_vector<expr>& tocollect);
void prune_by_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);
@ -246,6 +249,13 @@ 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);
/**
\brief extract literals from formulas that satisfy formulas.
\pre model satisfies formulas
*/
expr_ref_vector minimize_literals(ptr_vector<expr> const & formulas, expr_ref_vector const & model);
// for_each_expr visitor.
void operator()(expr* e) {}
};