mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-27 02:45:51 +00:00
Code Activity

refactor propagat_monic

Browse source
This commit is contained in:
Lev Nachmanson 2023-09-17 10:45:54 -07:00
parent 7353d7fb4d
commit 30b743d7b3
1 changed files with 96 additions and 87 deletions
Download patch file Download diff file Expand all files Collapse all files

183
src/math/lp/lp_bound_propagator.h
View file

@ -178,105 +178,114 @@ private:
}
void propagate_monic(lpvar monic_var, const svector<lpvar>& vars) {
lpvar non_fixed, zero_var;
if (!is_linear(vars, zero_var, non_fixed)) {
lpvar non_fixed, zero_var;
if (!is_linear(vars, zero_var, non_fixed)) {
return;
}
}
if (zero_var != null_lpvar) {
if (zero_var != null_lpvar) {
add_bounds_for_zero_var(monic_var, zero_var);
} else {
} else {
rational k = rational(1);
for (auto v : vars)
if (v != non_fixed) {
k *= lp().get_column_value(v).x;
if (k.is_big()) return;
}
lp::impq bound_value;
bool is_strict;
if (non_fixed != null_lpvar) {
if (lower_bound_is_available(non_fixed)) {
bound_value = lp().column_lower_bound(non_fixed);
is_strict = !bound_value.y.is_zero();
auto lambda = [vars, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_lower_bound_witness(non_fixed);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
if (k.is_pos())
add_lower_bound_monic(monic_var, k * bound_value.x, is_strict , lambda);
else
add_upper_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
}
if (upper_bound_is_available(non_fixed)) {
bound_value = lp().column_upper_bound(non_fixed);
is_strict = !bound_value.y.is_zero();
auto lambda = [vars, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_upper_bound_witness(non_fixed);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
if (k.is_neg())
add_lower_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
else
add_upper_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
}
if (lower_bound_is_available(monic_var)) {
auto lambda = [vars, monic_var, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_lower_bound_witness(monic_var);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
bound_value = lp().column_lower_bound(monic_var);
is_strict = !bound_value.y.is_zero();
if (k.is_pos())
add_lower_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
else
add_upper_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
}
if (upper_bound_is_available(monic_var)) {
bound_value = lp().column_upper_bound(monic_var);
is_strict = !bound_value.y.is_zero();
auto lambda = [vars, monic_var, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_upper_bound_witness(monic_var);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
if (k.is_neg())
add_lower_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
else
add_upper_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
}
propagate_monic_with_non_fixed(monic_var, vars, non_fixed, k);
} else { // all variables are fixed
auto lambda = [vars](int* s){return ((lp_bound_propagator*)s)->lp().get_bound_constraint_witnesses_for_columns(vars);};
add_lower_bound_monic(monic_var, k, false, lambda);
add_upper_bound_monic(monic_var, k, false, lambda);
propagate_monic_with_all_fixed(monic_var, vars, k);
}
}
}
}
void propagate_monic_with_non_fixed(lpvar monic_var, const svector<lpvar>& vars, lpvar non_fixed, rational k) {
lp::impq bound_value;
bool is_strict;
if (lower_bound_is_available(non_fixed)) {
bound_value = lp().column_lower_bound(non_fixed);
is_strict = !bound_value.y.is_zero();
auto lambda = [vars, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_lower_bound_witness(non_fixed);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
if (k.is_pos())
add_lower_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
else
add_upper_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
}
if (upper_bound_is_available(non_fixed)) {
bound_value = lp().column_upper_bound(non_fixed);
is_strict = !bound_value.y.is_zero();
auto lambda = [vars, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_upper_bound_witness(non_fixed);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
if (k.is_neg())
add_lower_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
else
add_upper_bound_monic(monic_var, k * bound_value.x, is_strict, lambda);
}
if (lower_bound_is_available(monic_var)) {
auto lambda = [vars, monic_var, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_lower_bound_witness(monic_var);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
bound_value = lp().column_lower_bound(monic_var);
is_strict = !bound_value.y.is_zero();
if (k.is_pos())
add_lower_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
else
add_upper_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
}
if (upper_bound_is_available(monic_var)) {
bound_value = lp().column_upper_bound(monic_var);
is_strict = !bound_value.y.is_zero();
auto lambda = [vars, monic_var, non_fixed](int* s) {
auto& l = ((lp_bound_propagator*)s)->lp();
u_dependency* dep = l.get_column_upper_bound_witness(monic_var);
for (auto v : vars) {
if (v != non_fixed) {
dep = l.join_deps(dep, l.get_bound_constraint_witnesses_for_column(v));
}
}
return dep;
};
if (k.is_neg())
add_lower_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
else
add_upper_bound_monic(non_fixed, bound_value.x / k, is_strict, lambda);
}
}
void propagate_monic_with_all_fixed(lpvar monic_var, const svector<lpvar>& vars, rational k) {
auto lambda = [vars](int* s) { return ((lp_bound_propagator*)s)->lp().get_bound_constraint_witnesses_for_columns(vars); };
add_lower_bound_monic(monic_var, k, false, lambda);
add_upper_bound_monic(monic_var, k, false, lambda);
}
column_type get_column_type(unsigned j) const {