void reduce_hypotheses(proof_ref &pr) {
ast_manager &m = pr.get_manager();
class reduce_hypotheses hypred(m);
hypred(pr);
DEBUG_CODE(proof_checker pc(m);
expr_ref_vector side(m);
SASSERT(pc.check(pr, side));
);
void operator()(proof_ref &pr)
{
compute_marks(pr);
if (!reduce_units(pr)) {
reduce(pr.get(), pr);
}
reset();
}
void mk_input_resolution(proof_ref& pr) {
ast_manager& m = pr.get_manager();
proof_ref pr1(m);
proof_ref_vector premises1(m), premises2(m), premises(m);
expr_ref conclusion1(m), conclusion2(m), conclusion(m);
svector<std::pair<unsigned, unsigned> > positions1, positions2, positions;
vector<expr_ref_vector> substs1, substs2, substs;
if (m.is_hyper_resolve(pr, premises1, conclusion1, positions1, substs1) &&
m.is_hyper_resolve(premises1[0].get(), premises, conclusion2, positions, substs2)) {
for (unsigned i = 1; i < premises1.size(); ++i) {
pr1 = premises1[i].get();
mk_input_resolution(pr1);
premises1[i] = pr1;
}
for (unsigned i = 0; i < premises.size(); ++i) {
pr1 = premises[i].get();
mk_input_resolution(pr1);
premises[i] = pr1;
}
unsigned sz = premises.size();
for (unsigned i = 1; i < sz; ++i) {
proof* premise = premises[i].get();
expr_ref_vector literals(m);
expr* l1, *l2;
if (!m.is_implies(premise, l1, l2)) {
continue;
}
qe::flatten_and(l1, literals);
positions2.reset();
premises2.reset();
premises2.push_back(premise);
substs2.reset();
for (unsigned j = 0; j < literals.size(); ++j) {
expr* lit = literals[j].get();
for (unsigned k = 1; k < premises1.size(); ++k) {
if (m.get_fact(premises1[k].get()) == lit) {
premises2.push_back(premises1[k].get());
positions2.push_back(std::make_pair(j+1,0));
substs2.push_back(expr_ref_vector(m));
break;
}
}
}
premises[i] = m.mk_hyper_resolve(premises2.size(), premises2.c_ptr(), l2, positions2, substs2);
}
conclusion = conclusion1;
pr = m.mk_hyper_resolve(premises.size(), premises.c_ptr(), conclusion, positions, substs);
}
}
void display(std::ostream & out) override {
out << "(proof->proof-converter-wrapper\n" << mk_ismt2_pp(m_pr.get(), m_pr.get_manager()) << ")\n";
}
proof_converter * translate(ast_translation & translator) override {
return alloc(proof2pc, translator.to(), translator(m_pr.get()));
}
void apply(ast_manager & m, proof_converter * pc, proof_ref & pr) {
if (pc) {
proof * _pr = pr.get();
pr = (*pc)(m, 1, &_pr);
}
}
