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fix disequality conflict shortcut

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This commit is contained in:
Jakob Rath 2023-07-20 15:10:58 +02:00
parent ec4be975ee
commit 4142201d88
3 changed files with 50 additions and 6 deletions
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40
src/test/slicing.cpp
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@ -274,9 +274,44 @@ namespace polysat {
s.pop();
}
}
};
}
// a = x[3:0]
// b = y[3:0]
// c = x[7:4]
// d = y[7:4]
// a = b
// c = d
// x != y
static void test8() {
std::cout << __func__ << "\n";
scoped_solver_slicing s;
slicing& sl = s.sl();
pvar x = s.add_var(8);
pvar y = s.add_var(8);
pvar a = sl.mk_extract(x, 3, 0);
pvar b = sl.mk_extract(y, 3, 0);
pvar c = sl.mk_extract(x, 7, 4);
pvar d = sl.mk_extract(y, 7, 4);
slicing::enode* sx = sl.var2slice(x);
slicing::enode* sy = sl.var2slice(y);
sl.add_constraint(s.eq(s.var(a), s.var(b)));
VERIFY(!sl.is_equal(sx, sy));
sl.add_constraint(s.eq(s.var(c), s.var(d)));
VERIFY(sl.is_equal(sx, sy));
sl.add_constraint(s.diseq(s.var(x), s.var(y)));
// sl.propagate();
VERIFY(sl.is_conflict());
sat::literal_vector reason_lits;
unsigned_vector reason_vars;
sl.explain(reason_lits, reason_vars);
std::cout << "Conflict: " << reason_lits << " vars " << reason_vars << "\n";
sl.display_tree(std::cout);
VERIFY(sl.invariant());
}
}; // test_slicing
} // namespace polysat
void tst_slicing() {
@ -288,5 +323,6 @@ void tst_slicing() {
test_slicing::test5();
test_slicing::test6();
test_slicing::test7();
test_slicing::test8();
std::cout << "ok\n";
}