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adding trail/levels

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-01-29 14:45:51 -08:00
parent e22c657811
commit 8d20310758
21 changed files with 199 additions and 7 deletions
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1
src/sat/sat_solver.h
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@ -300,6 +300,7 @@ namespace sat {
unsigned lvl(bool_var v) const { return m_level[v]; }
unsigned lvl(literal l) const { return m_level[l.var()]; }
unsigned init_trail_size() const { return at_base_lvl() ? m_trail.size() : m_scopes[0].m_trail_lim; }
unsigned trail_size() const { return m_trail.size(); }
literal trail_literal(unsigned i) const { return m_trail[i]; }
literal scope_literal(unsigned n) const { return m_trail[m_scopes[n].m_trail_lim]; }
void assign(literal l, justification j) {

23
src/sat/sat_solver/inc_sat_solver.cpp
View file

@ -318,6 +318,29 @@ public:
r.reset();
r.append(m_core.size(), m_core.c_ptr());
}
void get_levels(ptr_vector<expr> const& vars, unsigned_vector& depth) override {
unsigned sz = vars.size();
depth.resize(sz);
for (unsigned i = 0; i < sz; ++i) {
auto bv = m_map.to_bool_var(vars[i]);
depth = bv == sat::null_bool_var ? UINT_MAX : m_solver.lvl(bv);
}
}
expr_ref_vector get_trail() override {
expr_ref_vector result(m);
unsigned sz = m_solver.trail_size();
expr_ref_vector lit2expr(m);
lit2expr.resize(m_solver.num_vars() * 2);
m_map.mk_inv(lit2expr);
for (unsigned i = 0; i < sz; ++i) {
sat::literal lit = m_solver.trail_literal(i);
result.push_back(lit2expr[lit.index()].get());
}
return result;
}
proof * get_proof() override {
UNREACHABLE();
return nullptr;