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add defs to arith solver

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-06-12 12:41:01 -07:00 • committed by Arie Gurfinkel
parent 5fce4a1d1a
commit 0ae246ad2b
14 changed files with 326 additions and 225 deletions
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18
src/qe/qe_mbp.h
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@ -31,14 +31,32 @@ namespace qe {
struct cant_project {};
struct def {
expr_ref var, term;
def(expr_ref& v, expr_ref& t): var(v), term(t) {}
};
class project_plugin {
public:
virtual ~project_plugin() {}
virtual bool operator()(model& model, app* var, app_ref_vector& vars, expr_ref_vector& lits) = 0;
/**
\brief partial solver.
*/
virtual bool solve(model& model, app_ref_vector& vars, expr_ref_vector& lits) = 0;
virtual family_id get_family_id() = 0;
virtual void operator()(model& model, app_ref_vector& vars, expr_ref_vector& lits) { };
/**
\brief project vars modulo model, return set of definitions for eliminated variables.
- vars in/out: returns variables that were not eliminated
- lits in/out: returns projected literals
- returns set of definitions
(TBD: in triangular form, the last definition can be substituted into definitions that come before)
*/
virtual vector<def> project(model& model, app_ref_vector& vars, expr_ref_vector& lits) = 0;
static expr_ref pick_equality(ast_manager& m, model& model, expr* t);
static void erase(expr_ref_vector& lits, unsigned& i);
static void push_back(expr_ref_vector& lits, expr* lit);