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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-10-22 11:31:41 -07:00
parent 9bd7df7e19
commit c9900720f8
7 changed files with 39 additions and 15 deletions
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19
src/sat/smt/arith_axioms.cpp
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@ -301,10 +301,17 @@ namespace arith {
return;
expr* e1 = var2expr(v1);
expr* e2 = var2expr(v2);
if (e1 == e2)
return;
literal le, ge;
literal eq = eq_internalize(e1, e2);
if (a.is_numeral(e1))
std::swap(e1, e2);
if (a.is_numeral(e1)) {
add_unit(~mk_literal(m.mk_eq(e1, e2)));
std::cout << "two numerals\n";
return;
}
literal eq = eq_internalize(e1, e2);
if (a.is_numeral(e2)) {
le = mk_literal(a.mk_le(e1, e2));
ge = mk_literal(a.mk_ge(e1, e2));
@ -313,9 +320,19 @@ namespace arith {
expr_ref diff(a.mk_sub(e1, e2), m);
expr_ref zero(a.mk_numeral(rational(0), a.is_int(e1)), m);
rewrite(diff);
if (a.is_numeral(diff)) {
std::cout << "diff " << diff << " " << mk_pp(e1, m) << " " << mk_pp(e2, m) << "\n";
if (zero == diff)
add_unit(eq);
else
add_unit(~eq);
return;
}
le = mk_literal(a.mk_le(diff, zero));
ge = mk_literal(a.mk_ge(diff, zero));
}
std::cout << mk_pp(e1, m) << " " << mk_pp(e2, m) << " ";
std::cout << le << " " << ge << "\n";
add_clause(~eq, le);
add_clause(~eq, ge);
add_clause(~le, ~ge, eq);