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add parity4

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-12-09 09:56:47 -08:00
parent 707577644f
commit 6e886114f9
1 changed files with 15 additions and 5 deletions
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20
src/test/polysat.cpp
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@ -629,7 +629,7 @@ namespace polysat {
SASSERT(cl->size() == 2);
}
// 8 * x + 3 == 0 is unsat
// 8 * x + 3 == 0 or 8 * x + 5 == 0 is unsat
static void test_parity1() {
scoped_solver s(__func__);
auto x = s.var(s.add_var(8));
@ -642,7 +642,7 @@ namespace polysat {
s.expect_unsat();
}
// 8 * u * x + 3 == 0 is unsat
// 8 * u * x + 3 == 0 or 8 * u * x + 5 == 0 is unsat
static void test_parity1b() {
scoped_solver s(__func__);
auto u = s.var(s.add_var(8));
@ -656,7 +656,7 @@ namespace polysat {
s.expect_unsat();
}
// 8 * x + 4 == 0 is unsat
// 8 * x + 2 == 0 or 8 * x + 4 == 0 is unsat
static void test_parity2() {
scoped_solver s(__func__);
auto x = s.var(s.add_var(8));
@ -667,7 +667,7 @@ namespace polysat {
s.expect_unsat();
}
// x * y + 4 == 0 & 16 divides y is unsat
// (x * y + 4 == 0 or x * y + 2 == 0) & 16 divides y is unsat
static void test_parity3() {
scoped_solver s(__func__);
auto x = s.var(s.add_var(8));
@ -678,6 +678,15 @@ namespace polysat {
s.expect_unsat();
}
static void test_parity4() {
scoped_solver s(__func__);
auto x = s.var(s.add_var(8));
auto y = s.var(s.add_var(8));
s.add_eq(x * y + 2);
s.add_clause({ s.parity(y, 4), s.parity(y, 8) }, false);
s.check();
s.expect_unsat();
}
/**
* Check unsat of:
@ -1635,7 +1644,8 @@ void tst_polysat() {
#if 1 // Enable this block to run a single unit test with detailed output.
collect_test_records = false;
test_max_conflicts = 50;
test_polysat::test_parity1();
test_polysat::test_parity4();
// test_polysat::test_parity1();
// test_polysat::test_parity1b();
// test_polysat::test_parity2();
// test_polysat::test_parity3();