mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-10-08 17:01:55 +00:00
Code Activity

t

Browse source 
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2025-09-08 07:15:38 -10:00
parent 87cba2279e
commit 2a3cccaec3
1 changed files with 26 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

56
src/nlsat/levelwise.cpp
View file

@ -22,10 +22,8 @@ namespace nlsat {
ir_ord,
an_del,
non_null,
ord_inv_reducible,
ord_inv_irreducible,
sgn_inv_reducible,
sgn_inv_irreducible,
ord_inv,
sgn_inv,
connected,
an_sub,
sample,
@ -108,7 +106,10 @@ namespace nlsat {
out << "]\n";
return out;
}
bool is_irreducible(poly* p) {
return true;
}
/*
Short: build the initial property set Q so the one-cell algorithm can generalize the
@ -131,9 +132,10 @@ namespace nlsat {
void collect_level_properties(std::vector<poly*> & ps_of_n_level) {
for (unsigned i = 0; i < m_P.size(); ++i) {
poly* p = m_P[i];
SASSERT(is_irreducible(p));
unsigned level = max_var(p);
if (level < m_n)
m_Q[level].push(property(prop_enum::sgn_inv_irreducible, polynomial_ref(p, m_pm), /*s_idx*/0u, /* level */ level));
m_Q[level].push(property(prop_enum::sgn_inv, polynomial_ref(p, m_pm), /*s_idx*/0u, /* level */ level));
else if (level == m_n){
m_Q[level].push(property(prop_enum::an_del, polynomial_ref(p, m_pm), /* s_idx */ -1, level));
ps_of_n_level.push_back(p);
@ -202,7 +204,7 @@ namespace nlsat {
for (unsigned i = 0; i < factors.distinct_factors(); ++i) {
polynomial_ref f(m_pm);
f = factors[i];
m_Q[max_var(f)].push(property(prop_enum::ord_inv_irreducible, f, m_pm));
m_Q[max_var(f)].push(property(prop_enum::ord_inv, f, m_pm));
}
}
return true;
@ -310,7 +312,7 @@ namespace nlsat {
std::vector<const poly*> p_non_null;
for (const auto & pr: to_vector(m_Q[m_level])) {
SASSERT(max_var(pr.poly) == m_level);
if (pr.prop_tag == prop_enum::sgn_inv_irreducible && !coeffs_are_zeroes_on_sample(pr.poly, m_pm, sample(), m_am ))
if (pr.prop_tag == prop_enum::sgn_inv && !coeffs_are_zeroes_on_sample(pr.poly, m_pm, sample(), m_am ))
p_non_null.push_back(pr.poly.get());
}
std::vector<root_function> E;
@ -364,7 +366,7 @@ namespace nlsat {
// Returns true on failure.
// works on m_level
bool construct_interval() {
if (!apply_property_rules(prop_enum::sgn_inv_irreducible, false)) {
if (!apply_property_rules(prop_enum::sgn_inv, false)) {
return true;
}
@ -374,7 +376,7 @@ namespace nlsat {
// Extracted helper: handle ord_inv(discriminant_{x_{i+1}}(p)) for an_del pre-processing
void add_ord_inv_discriminant_for(const property& p) {
polynomial_ref disc(m_pm);
disc = discriminant(p.poly, p.level);
disc = discriminant(p.poly, p.level); // todo - factor the discriminant!!!!
TRACE(levelwise, ::nlsat::display(tout << "discriminant: ", m_solver, disc) << "\n";);
if (!is_const(disc)) {
if (coeffs_are_zeroes_on_sample(disc, m_pm, sample(), m_am)) {
@ -384,7 +386,7 @@ namespace nlsat {
}
else {
unsigned lvl = max_var(disc);
add_to_Q_if_new(property(prop_enum::ord_inv_irreducible, disc, /*s_idx*/ 0u, lvl));
add_to_Q_if_new(property(prop_enum::ord_inv, disc, /*s_idx*/ 0u, lvl));
}
}
}
@ -396,13 +398,14 @@ namespace nlsat {
if (deg > 0) {
polynomial_ref lc(m_pm);
lc = m_pm.coeff(pp, p.level, deg);
// todo - factor lc
if (!is_const(lc)) {
if (coeffs_are_zeroes_on_sample(lc, m_pm, sample(), m_am)) {
NOT_IMPLEMENTED_YET(); // leading coeff vanished as polynomial -- not handled yet
}
else {
unsigned lvl = max_var(lc);
add_to_Q_if_new(property(prop_enum::sgn_inv_irreducible, lc, /*s_idx*/ 0u, lvl));
add_to_Q_if_new(property(prop_enum::sgn_inv, lc, /*s_idx*/ 0u, lvl));
}
}
}
@ -518,7 +521,7 @@ namespace nlsat {
for (unsigned i = 0; i < factors.distinct_factors(); ++i) {
polynomial_ref f(m_pm);
f = factors[i];
add_to_Q_if_new(property(prop_enum::sgn_inv_irreducible, f, m_pm));
add_to_Q_if_new(property(prop_enum::sgn_inv, f, m_pm));
}
return true;
}
@ -557,11 +560,12 @@ namespace nlsat {
NOT_IMPLEMENTED_YET();
return;
}
// factor disc todo!!!!
// If discriminant is non-constant, add sign-invariance requirement for it
if (!is_const(disc)) {
unsigned lvl = max_var(disc);
add_to_Q_if_new(property(prop_enum::sgn_inv_irreducible, disc, /*s_idx*/ 0u, lvl));
add_to_Q_if_new(property(prop_enum::sgn_inv, disc, /*s_idx*/ 0u, lvl));
}
// non_null is established by the discriminant being non-zero at the sample
@ -610,15 +614,9 @@ or
add_to_Q_if_new(property(prop_enum::repr,m_pm, m_level - 1));
}
void apply_pre_sgn_inv_reducible(const property& p, bool has_repr) {
polynomial::factors factors(m_pm);
factor(p.poly, factors);
for (unsigned i = 0; i < factors.distinct_factors(); ++i) {
polynomial_ref f(m_pm);
f = factors[i];
add_to_Q_if_new(property(prop_enum::sgn_inv_irreducible, f, m_pm));
}
void apply_pre_sgn_inv(const property& p, bool has_repr) {
NOT_IMPLEMENTED_YET();
}
void apply_pre(const property& p, bool has_repr) {
@ -645,8 +643,8 @@ or
case prop_enum::sample:
apply_pre_sample(p, has_repr);
break;
case prop_enum::sgn_inv_reducible:
apply_pre_sgn_inv_reducible(p, has_repr);
case prop_enum::sgn_inv:
apply_pre_sgn_inv(p, has_repr);
break;
default:
TRACE(levelwise, display(tout << "not impl: p", p));
@ -682,10 +680,8 @@ or
case prop_enum::ir_ord: return "ir_ord";
case prop_enum::an_del: return "an_del";
case prop_enum::non_null: return "non_null";
case prop_enum::ord_inv_reducible: return "ord_inv_reducible";
case prop_enum::ord_inv_irreducible: return "ord_inv_irreducible";
case prop_enum::sgn_inv_reducible: return "sgn_inv_reducible";
case prop_enum::sgn_inv_irreducible: return "sgn_inv_irreducible";
case prop_enum::ord_inv: return "ord_inv";
case prop_enum::sgn_inv: return "sgn_inv";
case prop_enum::connected: return "connected";
case prop_enum::an_sub: return "an_sub";
case prop_enum::sample: return "sample";