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fix and-propagation

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This commit is contained in:
Jakob Rath 2023-01-23 15:03:18 +01:00
parent 58ab342029
commit 07de75cd12
1 changed files with 4 additions and 5 deletions
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9
src/math/polysat/op_constraint.cpp
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@ -548,17 +548,16 @@ namespace polysat {
return {};
}
}
// Propagate r if p or q are 0
if (pv.is_zero() && !rv.is_zero()) // rv not necessarily fully evaluated
return s.mk_clause(~andc, s.ule(r(), p()), true);
if (qv.is_zero() && !rv.is_zero()) // rv not necessarily fully evaluated
return s.mk_clause(~andc, s.ule(r(), q()), true);
// p = a && q = b ==> r = a & b
if (pv.is_val() && qv.is_val() && !rv.is_val())
return s.mk_clause(~andc, ~s.eq(p(), pv), ~s.eq(q(), qv), s.eq(r(), bitwise_and(pv.val(), qv.val())), true);
if (pv.is_val() && qv.is_val() && !rv.is_val()) {
const rational& pr = pv.val();
const rational& qr = qv.val();
return s.mk_clause(~s.eq(p(), m.mk_val(pr)), ~s.eq(q(), m.mk_val(qr)), s.eq(r(), m.mk_val(bitwise_and(pr, qr))), true);
}
return {};
}