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removing unit clauses and dependency manager, use minisat approach by tracking assumption literals directly also in clauses

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-09-20 15:10:03 -07:00
parent bb5ff8db24
commit 8ee54c665a
12 changed files with 60 additions and 179 deletions
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6
src/math/polysat/constraint.h
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@ -77,11 +77,6 @@ namespace polysat {
void store(clause* cl, solver& s);
/// Register a unit clause with an external dependency.
void register_external(signed_constraint c);
void unregister_external(constraint* c);
signed_constraint lookup_external(unsigned dep) const;
/// Release clauses at the given level and above.
void release_level(unsigned lvl);
@ -185,7 +180,6 @@ namespace polysat {
clause* unit_clause() const { return m_unit_clause; }
void set_unit_clause(clause* cl);
p_dependency* unit_dep() const { return m_unit_clause ? m_unit_clause->dep() : nullptr; }
void set_external(bool sign) { m_external_sign = to_lbool(sign); }
void unset_external() { m_external_sign = l_undef; }