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throttle monomial unit prop and and nl params

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This commit is contained in:
Lev Nachmanson 2023-09-25 16:47:34 -07:00
parent 896aba31f8
commit 6ff4856e38
4 changed files with 35 additions and 3 deletions
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31
src/math/lp/nla_core.cpp
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@ -1913,6 +1913,10 @@ void core::add_lower_bound_monic(lpvar j, const lp::mpq& v, bool is_strict, std:
}
void core::propagate_monic_with_non_fixed(lpvar monic_var, const svector<lpvar>& vars, lpvar non_fixed, const rational& k) {
if (params().arith_nl_use_lemmas_in_unit_prop()) {
propagate_monic_non_fixed_with_lemma(monic_var, vars, non_fixed, k);
return;
}
lp::impq bound_value;
bool is_strict;
auto& lps = lra;
@ -2002,13 +2006,38 @@ void core::add_lower_bound_monic(lpvar j, const lp::mpq& v, bool is_strict, std:
add_lower_bound_monic(monic_var, lp::mpq(0), false, lambda);
add_upper_bound_monic(monic_var, lp::mpq(0), false, lambda);
}
void core::propagate_monic_non_fixed_with_lemma(lpvar monic_var, const svector<lpvar>& vars, lpvar non_fixed, const rational& k) {
lp::impq bound_value;
new_lemma lemma(*this, "propagate monic with non fixed");
// using += to not assert thath the inequality does not hold
lemma += ineq(term(rational(1), monic_var, -k, non_fixed), llc::EQ, 0);
lp::explanation exp;
for (auto v : m_emons[monic_var].vars()) {
if (v == non_fixed) continue;
u_dependency* dep = lra.get_column_lower_bound_witness(v);
for (auto ci : lra.flatten(dep)) {
exp.push_back(ci);
}
dep = lra.get_column_upper_bound_witness(v);
for (auto ci : lra.flatten(dep)) {
exp.push_back(ci);
}
}
lemma &= exp;
}
void core::calculate_implied_bounds_for_monic(lp::lpvar monic_var) {
m_propagated.reserve(monic_var + 1, false);
bool throttle = params().arith_nl_throttle_unit_prop();
if (throttle && m_propagated[monic_var])
return;
lpvar non_fixed, zero_var;
const auto& vars = m_emons[monic_var].vars();
if (!is_linear(vars, zero_var, non_fixed))
return;
if (throttle)
trail().push(set_bitvector_trail(m_propagated, monic_var));
if (zero_var != null_lpvar)
add_bounds_for_zero_var(monic_var, zero_var);
else {

3
src/math/lp/nla_core.h
View file

@ -114,7 +114,7 @@ class core {
bool m_cautious_patching = true;
lpvar m_patched_var = 0;
monic const* m_patched_monic = nullptr;
bool_vector m_propagated;
void check_weighted(unsigned sz, std::pair<unsigned, std::function<void(void)>>* checks);
void add_bounds();
std_vector<lp::implied_bound> & m_implied_bounds;
@ -438,6 +438,7 @@ public:
bool is_linear(const svector<lpvar>& m, lpvar& zero_var, lpvar& non_fixed);
void add_bounds_for_zero_var(lpvar monic_var, lpvar zero_var);
void propagate_monic_with_non_fixed(lpvar monic_var, const svector<lpvar>& vars, lpvar non_fixed, const rational& k);
void core::propagate_monic_non_fixed_with_lemma(lpvar monic_var, const svector<lpvar>& vars, lpvar non_fixed, const rational& k);
void propagate_monic_with_all_fixed(lpvar monic_var, const svector<lpvar>& vars, const rational& k);
void add_lower_bound_monic(lpvar j, const lp::mpq& v, bool is_strict, std::function<u_dependency*()> explain_dep);
void add_upper_bound_monic(lpvar j, const lp::mpq& v, bool is_strict, std::function<u_dependency*()> explain_dep);