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Add level to conflict

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- reset conflict at correct level when popping user scopes
- functions as flag when handling inconsistent input (e.g., opposite literals)
- now all constraints in the conflict core should have bvalue == l_true
This commit is contained in:
Jakob Rath 2022-09-23 15:54:37 +02:00
parent 86d00b536a
commit a4f0e3a228
5 changed files with 87 additions and 28 deletions
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37
src/test/polysat.cpp
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@ -1120,22 +1120,29 @@ namespace polysat {
s.check();
}
}
// Goal: we probably mix up polysat variables and PDD variables at several points; try to uncover such cases
// NOTE: actually, add_var seems to keep them in sync, so this is not an issue at the moment (but we should still test it later)
// static void test_mixed_vars() {
// scoped_solver s(__func__);
// auto a = s.var(s.add_var(2));
// auto b = s.var(s.add_var(4));
// auto c = s.var(s.add_var(2));
// s.add_eq(a + 2*c + 4);
// s.add_eq(3*b + 4);
// s.check();
// // Expected result:
// }
static void test_pop_conflict() {
scoped_solver s(__func__);
auto a = s.var(s.add_var(32));
s.add_ule(a, 5);
s.push();
s.add_ult(5, a);
s.push();
s.add_ule(1, a);
s.check();
s.expect_unsat();
s.pop();
s.check();
s.expect_unsat();
s.pop();
s.add_ult(4, a);
// s.add_ule(100, a);
s.check();
s.expect_sat({{a, 5}});
}
}; // class test_polysat
// Here we deal with linear constraints of the form
//