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adding Cube method to .NET API, removing lookahead and get-lemmas

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-10-29 08:57:24 -07:00
parent 2774d6896b
commit 92b5301b7f
13 changed files with 38 additions and 187 deletions
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55
src/sat/sat_solver/inc_sat_solver.cpp
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@ -310,51 +310,6 @@ public:
return 0;
}
virtual expr_ref lookahead(expr_ref_vector const& assumptions, expr_ref_vector const& candidates) {
IF_VERBOSE(1, verbose_stream() << "(sat-lookahead " << candidates.size() << ")\n";);
sat::bool_var_vector vars;
sat::literal_vector lits;
expr_ref_vector lit2expr(m);
lit2expr.resize(m_solver.num_vars() * 2);
m_map.mk_inv(lit2expr);
for (auto c : candidates) {
sat::bool_var v = m_map.to_bool_var(c);
if (v != sat::null_bool_var) {
vars.push_back(v);
}
}
for (auto c : assumptions) {
SASSERT(is_literal(c));
sat::bool_var v = sat::null_bool_var;
bool sign = false;
expr* e = c;
while (m.is_not(e, e)) {
sign = !sign;
}
if (is_uninterp_const(e)) {
v = m_map.to_bool_var(e);
}
if (v != sat::null_bool_var) {
lits.push_back(sat::literal(v, sign));
}
else {
IF_VERBOSE(0, verbose_stream() << "WARNING: could not handle " << mk_pp(c, m) << "\n";);
}
}
if (vars.empty()) {
return expr_ref(m.mk_true(), m);
}
sat::literal l = m_solver.select_lookahead(lits, vars);
if (m_solver.inconsistent()) {
IF_VERBOSE(1, verbose_stream() << "(sat-lookahead inconsistent)\n";);
return expr_ref(m.mk_false(), m);
}
if (l == sat::null_literal) {
return expr_ref(m.mk_true(), m);
}
expr_ref result(lit2expr[l.index()].get(), m);
return result;
}
virtual expr_ref cube() {
if (!m_internalized) {
dep2asm_t dep2asm;
@ -386,16 +341,6 @@ public:
return mk_and(fmls);
}
virtual void get_lemmas(expr_ref_vector & lemmas) {
if (!m_internalized) return;
sat2goal s2g;
goal g(m, false, false, false);
s2g.get_learned(m_solver, m_map, m_params, lemmas);
IF_VERBOSE(1, verbose_stream() << "(sat :lemmas " << lemmas.size() << ")\n";);
// TBD: handle externals properly.
}
virtual lbool get_consequences_core(expr_ref_vector const& assumptions, expr_ref_vector const& vars, expr_ref_vector& conseq) {
init_preprocess();
TRACE("sat", tout << assumptions << "\n" << vars << "\n";);