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cheap equalities

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-09 17:14:32 -07:00
parent ccc8651800
commit 1587497562
5 changed files with 156 additions and 70 deletions
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3
src/smt/theory_arith_eq.h
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@ -223,8 +223,7 @@ namespace smt {
theory_var x;
theory_var y;
numeral k;
if (is_offset_row(r, x, y, k)) {
if (is_offset_row(r, x, y, k)) {
if (y == null_theory_var) {
// x is an implied fixed var at k.
value_sort_pair key(k, is_int_src(x));

19
src/smt/theory_lra.cpp
View file

@ -1582,8 +1582,8 @@ public:
}
m_variable_values[t.index()] = result;
return result;
}
}
void init_variable_values() {
reset_variable_values();
if (m.inc() && m_solver.get() && th.get_num_vars() > 0) {
@ -1596,19 +1596,6 @@ public:
m_variable_values.clear();
}
bool congruent_or_irrelevant(lpvar k, lpvar j) {
theory_var kv = lp().local_to_external(k);
if (kv == null_theory_var)
return true;
theory_var jv = lp().local_to_external(j);
if (jv == null_theory_var)
return true;
enode * n0 = get_enode(kv);
enode * n1 = get_enode(jv);
return n0->get_root() == n1->get_root();
}
void random_update() {
if (m_nla)
return;
@ -3203,6 +3190,8 @@ public:
return get_enode(x)->get_root() == get_enode(y)->get_root();
}
unsigned get_num_vars() const { return th.get_num_vars(); }
void fixed_var_eh(theory_var v1, rational const& bound) {
// IF_VERBOSE(0, verbose_stream() << "fix " << mk_bounded_pp(get_owner(v1), m) << " " << bound << "\n");