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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-12-13 10:24:42 -08:00
parent 33d433d742
commit c7da31a67d
7 changed files with 74 additions and 46 deletions
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15
src/math/polysat/viable.h
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@ -32,14 +32,15 @@ namespace polysat {
solver& s;
struct entry : public dll_base<entry>, public fi_record {
rational coeff;
entry(rational const& m) : fi_record({ eval_interval::full(), {}, {} }), coeff(m) {}
entry() : fi_record({ eval_interval::full(), {}, {}, rational::one()}) {}
};
enum class entry_kind { unit_e, equal_e, diseq_e };
ptr_vector<entry> m_alloc;
ptr_vector<entry> m_units; // set of viable values based on unit multipliers
ptr_vector<entry> m_non_units; // entries that have non-unit multipliers
svector<std::tuple<pvar, bool, entry*>> m_trail; // undo stack
ptr_vector<entry> m_equal_lin; // entries that have non-unit multipliers, but are equal
ptr_vector<entry> m_diseq_lin; // entries that have distinct non-zero multipliers
svector<std::tuple<pvar, entry_kind, entry*>> m_trail; // undo stack
bool well_formed(entry* e);
@ -51,15 +52,17 @@ namespace polysat {
std::ostream& display(std::ostream& out, pvar v, entry* e) const;
void insert(entry* e, pvar v, ptr_vector<entry>& entries, entry_kind k);
public:
viable(solver& s);
~viable();
// declare and remove var
void push(unsigned) { m_units.push_back(nullptr); m_non_units.push_back(nullptr); }
void push(unsigned) { m_units.push_back(nullptr); m_equal_lin.push_back(nullptr); }
void pop() { m_units.pop_back(); m_non_units.pop_back(); }
void pop() { m_units.pop_back(); m_equal_lin.pop_back(); }
void pop_viable();