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#5324

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This commit is contained in:
Nikolaj Bjorner 2021-06-06 16:23:27 -07:00
parent 9afc59d5b4
commit 34fc0cdd5c
4 changed files with 53 additions and 30 deletions
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68
src/sat/smt/fpa_solver.cpp
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@ -122,6 +122,50 @@ namespace fpa {
n = mk_enode(e, false);
SASSERT(!n->is_attached_to(get_id()));
mk_var(n);
TRACE("fp", tout << "post: " << mk_bounded_pp(e, m) << "\n";);
m_nodes.push_back(std::tuple(n, sign, root));
ctx.push(push_back_trail(m_nodes));
return true;
}
void solver::apply_sort_cnstr(enode* n, sort* s) {
TRACE("t_fpa", tout << "apply sort cnstr for: " << mk_ismt2_pp(n->get_expr(), m) << "\n";);
SASSERT(s->get_family_id() == get_id());
SASSERT(m_fpa_util.is_float(s) || m_fpa_util.is_rm(s));
SASSERT(m_fpa_util.is_float(n->get_expr()) || m_fpa_util.is_rm(n->get_expr()));
SASSERT(n->get_decl()->get_range() == s);
if (is_attached_to_var(n))
return;
attach_new_th_var(n);
expr* owner = n->get_expr();
if (m_fpa_util.is_rm(s) && !m_fpa_util.is_bv2rm(owner)) {
// For every RM term, we need to make sure that it's
// associated bit-vector is within the valid range.
expr_ref valid(m), limit(m);
limit = m_bv_util.mk_numeral(4, 3);
valid = m_bv_util.mk_ule(m_converter.wrap(owner), limit);
add_unit(mk_literal(valid));
}
activate(owner);
}
bool solver::unit_propagate() {
if (m_nodes.size() <= m_nodes_qhead)
return false;
ctx.push(value_trail<unsigned>(m_nodes_qhead));
for (; m_nodes_qhead < m_nodes.size(); ++m_nodes_qhead)
unit_propagate(m_nodes[m_nodes_qhead]);
return true;
}
void solver::unit_propagate(std::tuple<enode*, bool, bool> const& t) {
auto [n, sign, root] = t;
expr* e = n->get_expr();
app* a = to_app(e);
if (m.is_bool(e)) {
sat::literal atom(ctx.get_si().add_bool_var(e), false);
atom = ctx.attach_lit(atom, e);
@ -151,31 +195,7 @@ namespace fpa {
break;
}
}
return true;
}
void solver::apply_sort_cnstr(enode* n, sort* s) {
TRACE("t_fpa", tout << "apply sort cnstr for: " << mk_ismt2_pp(n->get_expr(), m) << "\n";);
SASSERT(s->get_family_id() == get_id());
SASSERT(m_fpa_util.is_float(s) || m_fpa_util.is_rm(s));
SASSERT(m_fpa_util.is_float(n->get_expr()) || m_fpa_util.is_rm(n->get_expr()));
SASSERT(n->get_decl()->get_range() == s);
if (is_attached_to_var(n))
return;
attach_new_th_var(n);
expr* owner = n->get_expr();
if (m_fpa_util.is_rm(s) && !m_fpa_util.is_bv2rm(owner)) {
// For every RM term, we need to make sure that it's
// associated bit-vector is within the valid range.
expr_ref valid(m), limit(m);
limit = m_bv_util.mk_numeral(4, 3);
valid = m_bv_util.mk_ule(m_converter.wrap(owner), limit);
add_unit(mk_literal(valid));
}
activate(owner);
}
void solver::activate(expr* n) {