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fix parameters in utvpi and make Karr invariants use backward propagation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-05-12 17:02:25 -07:00
parent c8c5f30b49
commit 5eed106ffe
7 changed files with 101 additions and 66 deletions
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13
src/smt/theory_utvpi.h
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@ -65,7 +65,7 @@ namespace smt {
class parent_trail;
struct GExt : public Ext {
typedef literal explanation;
typedef std::pair<literal,unsigned> explanation;
};
class atom {
@ -113,15 +113,18 @@ namespace smt {
// a negative cycle.
class nc_functor {
literal_vector m_antecedents;
unsigned_vector m_coeffs;
theory_utvpi& m_super;
public:
nc_functor(theory_utvpi& s) : m_super(s) {}
void reset() { m_antecedents.reset(); }
void reset() { m_antecedents.reset(); m_coeffs.reset(); }
literal_vector const& get_lits() const { return m_antecedents; }
unsigned_vector const& get_coeffs() const { return m_coeffs; }
void operator()(literal const & ex) {
if (ex != null_literal) {
m_antecedents.push_back(ex);
void operator()(std::pair<literal,unsigned> const & ex) {
if (ex.first != null_literal) {
m_antecedents.push_back(ex.first);
m_coeffs.push_back(ex.second);
}
}