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fix #2468, adding assignment phase heuristic

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-08-10 15:24:42 -07:00
parent 42e21458ba
commit 9fa9aa09ff
19 changed files with 268 additions and 79 deletions
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26
src/smt/theory_lra.cpp
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@ -939,6 +939,29 @@ public:
m_asserted_atoms.push_back(delayed_atom(v, is_true));
}
lbool get_phase(bool_var v) {
lp_api::bound* b;
if (!m_bool_var2bound.find(v, b)) {
return l_undef;
}
scoped_internalize_state st(*this);
st.vars().push_back(b->get_var());
st.coeffs().push_back(rational::one());
init_left_side(st);
lp::lconstraint_kind k = lp::EQ;
switch (b->get_bound_kind()) {
case lp_api::lower_t:
k = lp::GE;
break;
case lp_api::upper_t:
k = lp::LE;
break;
}
auto vi = get_var_index(b->get_var());
rational bound = b->get_value();
return m_solver->compare_values(vi, k, bound) ? l_true : l_false;
}
void new_eq_eh(theory_var v1, theory_var v2) {
// or internalize_eq(v1, v2);
m_arith_eq_adapter.new_eq_eh(v1, v2);
@ -3565,6 +3588,9 @@ void theory_lra::internalize_eq_eh(app * atom, bool_var v) {
void theory_lra::assign_eh(bool_var v, bool is_true) {
m_imp->assign_eh(v, is_true);
}
lbool theory_lra::get_phase(bool_var v) {
return m_imp->get_phase(v);
}
void theory_lra::new_eq_eh(theory_var v1, theory_var v2) {
m_imp->new_eq_eh(v1, v2);
}