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linear solver

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-05-14 17:10:01 -07:00
parent 17fcf79c04
commit 683ce27c8f
8 changed files with 264 additions and 42 deletions
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5
src/math/polysat/constraint.h
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@ -17,7 +17,7 @@ Author:
namespace polysat {
enum ckind_t { eq_t, ule_t, sle_t, bit_t };
enum ckind_t { eq_t, ule_t, bit_t };
enum csign_t : bool { neg_t = false, pos_t = true };
class eq_constraint;
@ -42,10 +42,11 @@ namespace polysat {
static constraint* viable(unsigned lvl, bool_var bvar, csign_t sign, pvar v, bdd const& b, p_dependency_ref const& d);
static constraint* ule(unsigned lvl, bool_var bvar, csign_t sign, pdd const& a, pdd const& b, p_dependency_ref const& d);
static constraint* ult(unsigned lvl, bool_var bvar, csign_t sign, pdd const& a, pdd const& b, p_dependency_ref const& d);
static constraint* sle(unsigned lvl, bool_var bvar, csign_t sign, pdd const& a, pdd const& b, p_dependency_ref const& d);
static constraint* slt(unsigned lvl, bool_var bvar, csign_t sign, pdd const& a, pdd const& b, p_dependency_ref const& d);
virtual ~constraint() {}
bool is_eq() const { return m_kind == ckind_t::eq_t; }
bool is_ule() const { return m_kind == ckind_t::ule_t; }
bool is_sle() const { return m_kind == ckind_t::sle_t; }
ckind_t kind() const { return m_kind; }
virtual std::ostream& display(std::ostream& out) const = 0;
bool propagate(solver& s, pvar v);