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disable lookahead on compound values (fixes bug reported by Clemens), bail to rationals when there are reals.

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This commit is contained in:
Nikolaj Bjorner 2025-01-24 11:01:18 -08:00
parent 053349cd36
commit 9e8dd68ee6
2 changed files with 29 additions and 7 deletions
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35
src/ast/sls/sls_arith_base.cpp
View file

@ -755,6 +755,21 @@ namespace sls {
return false;
}
template<>
void arith_base<rational>::check_real(expr*) {}
template<>
void arith_base<checked_int64<true>>::check_real(expr* e) {
if (a.is_real(e))
throw overflow_exception();
}
template<typename num_t>
void arith_base<num_t>::check_real(expr* e) {
UNREACHABLE();
}
template<>
rational arith_base<rational>::to_num(rational const& r) {
return r;
@ -1475,9 +1490,9 @@ namespace sls {
case ineq_kind::LE:
if (lit.sign()) {
if (c == -1) // -x + c >= 0 <=> c >= x
add_le(v, ineq->m_coeff);
add_lt(v, ineq->m_coeff);
else if (c == 1) // x + c >= 0 <=> x >= -c
add_ge(v, -ineq->m_coeff);
add_gt(v, -ineq->m_coeff);
else
verbose_stream() << "INITIALIZE " << lit << " " << *ineq << "\n";
}
@ -1839,7 +1854,9 @@ namespace sls {
for (auto const& [x, nl] : ineq->m_nonlinear) {
if (is_fixed(x))
continue;
if (is_linear(x, nl, b))
if (is_add(x) || is_mul(x))
;
else if (is_linear(x, nl, b))
find_linear_moves(*ineq, x, b);
else if (is_quadratic(x, nl, a, b))
find_quadratic_moves(*ineq, x, a, b, ineq->m_args_value);
@ -2033,6 +2050,7 @@ namespace sls {
auto v = ctx.atom2bool_var(e);
if (v != sat::null_bool_var)
init_bool_var(v);
check_real(e);
if (!a.is_arith_expr(e) && !m.is_eq(e) && !m.is_distinct(e))
for (auto arg : *e)
if (a.is_int_real(arg))
@ -2844,7 +2862,9 @@ namespace sls {
for (auto const& [x, nl] : ineq->m_nonlinear) {
if (is_fixed(x))
continue;
if (is_linear(x, nl, nb))
if (is_add(x) || is_mul(x))
;
else if (is_linear(x, nl, nb))
find_linear_moves(*ineq, x, nb);
else if (is_quadratic(x, nl, na, nb))
find_quadratic_moves(*ineq, x, na, nb, ineq->m_args_value);
@ -3184,6 +3204,9 @@ namespace sls {
template<typename num_t>
void arith_base<num_t>::update_args_value(var_t v, num_t const& new_value) {
auto& vi = m_vars[v];
auto old_value = value(v);
IF_VERBOSE(5, verbose_stream() << "update: v" << v << " " << mk_bounded_pp(vi.m_expr, m) << " := " << old_value << " -> " << new_value << "\n");
vi.set_value(new_value);
for (auto const& idx : vi.m_muls) {
auto& [x, monomial] = m_muls[idx];
@ -3201,13 +3224,11 @@ namespace sls {
update_args_value(ad.m_var, new_sum);
}
auto old_value = value(v);
for (auto const& [coeff, bv] : vi.m_linear_occurs) {
auto& ineq = *get_ineq(bv);
ineq.m_args_value += coeff * (new_value - old_value);
}
IF_VERBOSE(5, verbose_stream() << "update: v" << v << " " << mk_bounded_pp(vi.m_expr, m) << " := " << old_value << " -> " << new_value << "\n");
vi.set_value(new_value);
}
template<typename num_t>

1
src/ast/sls/sls_arith_base.h
View file

@ -311,6 +311,7 @@ namespace sls {
num_t value(var_t v) const { return m_vars[v].value(); }
bool is_num(expr* e, num_t& i);
num_t to_num(rational const& r);
void check_real(expr* e);
expr_ref from_num(sort* s, num_t const& n);
void check_ineqs();
void init_bool_var(sat::bool_var bv);