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remove unused euf-mbi

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-12-28 19:47:48 +08:00
parent 64103038a7
commit e40884725b
2 changed files with 5 additions and 106 deletions
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100
src/qe/qe_mbi.cpp
View file

@ -96,101 +96,6 @@ namespace qe {
m_solver->assert_expr(mk_not(mk_and(lits)));
}
// -------------------------------
// euf_mbi
struct euf_mbi_plugin::is_atom_proc {
ast_manager& m;
expr_ref_vector& m_atoms;
is_atom_proc(expr_ref_vector& atoms): m(atoms.m()), m_atoms(atoms) {}
void operator()(app* a) {
if (m.is_eq(a)) {
m_atoms.push_back(a);
}
else if (m.is_bool(a) && a->get_family_id() != m.get_basic_family_id()) {
m_atoms.push_back(a);
}
}
void operator()(expr*) {}
};
euf_mbi_plugin::euf_mbi_plugin(solver* s, solver* sNot):
mbi_plugin(s->get_manager()),
m_atoms(m),
m_solver(s),
m_dual_solver(sNot) {
params_ref p;
p.set_bool("core.minimize", true);
m_solver->updt_params(p);
m_dual_solver->updt_params(p);
expr_ref_vector fmls(m);
m_solver->get_assertions(fmls);
expr_fast_mark1 marks;
is_atom_proc proc(m_atoms);
for (expr* e : fmls) {
quick_for_each_expr(proc, marks, e);
}
}
mbi_result euf_mbi_plugin::operator()(expr_ref_vector& lits, model_ref& mdl) {
lbool r = m_solver->check_sat(lits);
switch (r) {
case l_false:
lits.reset();
m_solver->get_unsat_core(lits);
// optionally minimize core using superposition.
return mbi_unsat;
case l_true: {
m_solver->get_model(mdl);
model_evaluator mev(*mdl.get());
lits.reset();
for (expr* e : m_atoms) {
if (mev.is_true(e)) {
lits.push_back(e);
}
else if (mev.is_false(e)) {
lits.push_back(m.mk_not(e));
}
}
TRACE("qe", tout << "atoms from model: " << lits << "\n";);
r = m_dual_solver->check_sat(lits);
expr_ref_vector core(m);
term_graph tg(m);
switch (r) {
case l_false:
// use the dual solver to find a 'small' implicant
m_dual_solver->get_unsat_core(core);
TRACE("qe", tout << "core: " << core << "\n";);
// project the implicant onto vars
tg.set_vars(m_shared, false);
tg.add_lits(core);
lits.reset();
lits.append(tg.project(*mdl));
TRACE("qe", tout << "project: " << lits << "\n";);
return mbi_sat;
case l_undef:
return mbi_undef;
case l_true:
UNREACHABLE();
return mbi_undef;
}
return mbi_sat;
}
default:
// TBD: if not running solver to completion, then:
// 1. extract unit literals from m_solver.
// 2. run a cc over the units
// 3. extract equalities or other assignments over the congruence classes
// 4. ensure that at least some progress is made over original lits.
return mbi_undef;
}
}
void euf_mbi_plugin::block(expr_ref_vector const& lits) {
m_solver->assert_expr(mk_not(mk_and(lits)));
}
// -------------------------------
// euf_arith_mbi
@ -341,6 +246,11 @@ namespace qe {
project(mdl, lits);
return mbi_sat;
default:
// TBD: if not running solver to completion, then:
// 1. extract unit literals from m_solver.
// 2. run a cc over the units
// 3. extract equalities or other assignments over the congruence classes
// 4. ensure that at least some progress is made over original lits.
return mbi_undef;
}
}

11
src/qe/qe_mbi.h
View file

@ -93,17 +93,6 @@ namespace qe {
void block(expr_ref_vector const& lits) override;
};
class euf_mbi_plugin : public mbi_plugin {
expr_ref_vector m_atoms;
solver_ref m_solver;
solver_ref m_dual_solver;
struct is_atom_proc;
public:
euf_mbi_plugin(solver* s, solver* sNot);
~euf_mbi_plugin() override {}
mbi_result operator()(expr_ref_vector& lits, model_ref& mdl) override;
void block(expr_ref_vector const& lits) override;
};
class euf_arith_mbi_plugin : public mbi_plugin {
expr_ref_vector m_atoms;