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more imp notes and relevancy experiment

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2025-09-22 12:44:50 +03:00
parent 0a0e925f27
commit db5a991257
5 changed files with 54 additions and 6 deletions
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55
src/math/lp/nla_mul_saturate.cpp
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@ -31,10 +31,10 @@ namespace nla {
for (auto& con : lra.constraints().active()) {
for (auto v : m.vars()) {
for (auto [coeff, u] : con.coeffs()) {
if (u == v) {
// add new constraint
if (u == v)
// multiply by remaining vars
}
multiply_constraint(con, m, v);
// add new constraint
}
}
}
@ -55,8 +55,53 @@ namespace nla {
return r;
}
lp::lar_base_constraint* mul_saturate::multiply_constraint(lp::lar_base_constraint const& c, monic const& m, lpvar x) {
// multiply by remaining vars
void mul_saturate::multiply_constraint(lp::lar_base_constraint const& con, monic const& m, lpvar x) {
auto const& lhs = con.coeffs();
auto const& rhs = con.rhs();
auto k = con.kind();
auto sign = false;
svector<lpvar> vars;
bool first = true;
for (auto v : m.vars()) {
if (v != x || !first)
vars.push_back(v);
else
first = false;
}
vector<std::pair<rational, lpvar>> new_lhs;
rational new_rhs(rhs);
for (auto [coeff, v] : lhs) {
vars.push_back(v);
return nullptr;
auto new_m = c().emons().find_canonical(vars);
if (!new_m) {
bool is_int = lra.var_is_int(x); // assume all vars in monic have the same type, can be changed for MIP
lpvar new_monic_var = 0; // lra.add_var(is_int);
c().emons().add(new_monic_var, vars);
new_m = c().emons().find_canonical(vars);
SASSERT(new_m);
}
new_lhs.push_back({coeff, new_m->var()});
vars.pop_back();
}
if (rhs != 0) {
new_lhs.push_back({-rhs, m.var()});
new_rhs = 0;
}
// compute sign of vars
for (auto v : vars)
if (c().val(v).is_neg())
sign = !sign;
if (sign) {
switch (k) {
case lp::lconstraint_kind::LE: k = lp::lconstraint_kind::GE; break;
case lp::lconstraint_kind::LT: k = lp::lconstraint_kind::GT; break;
case lp::lconstraint_kind::GE: k = lp::lconstraint_kind::LE; break;
case lp::lconstraint_kind::GT: k = lp::lconstraint_kind::LT; break;
default: break;
}
}
// instead of adding a constraint here, add row to tableau based on the new_lhs, new_rhs, k.
}
}