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update ml example to 64 bit

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-01-24 04:33:52 -08:00
parent 15d853dc04
commit 47c7ed3b17
2 changed files with 15 additions and 6 deletions
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13
src/ast/simplifiers/bound_simplifier.cpp
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@ -200,13 +200,22 @@ void bound_simplifier::tighten_bound(dependent_expr const& de) {
return;
rational n, k;
expr* x, *y, *f = de.fml();
expr* z, *u;
expr* z, * u, * v, * w;
bool strict;
if (a.is_le(f, x, y)) {
// x <= (x + k) mod N && x >= 0 -> x + k < N
if (a.is_mod(y, z, u) && a.is_numeral(u, n) && has_lower(x, k, strict) && k >= 0 && is_offset(z, x, k) && k > 0 && k < n)
assert_upper(x, n - k, true);
// x <= (x + y) mod N && x >= 0 && 0 <= y < N => x + y < N
if (a.is_mod(y, z, u) && a.is_numeral(u, n) && n > 0) {
assert_upper(x, n, true);
if (has_lower(x, k, strict) && k >= 0 && a.is_add(z, v, w)) {
if (x == v && has_upper(w, k, strict) && k < n)
assert_upper(z, n, true);
if (x == w && has_upper(v, k, strict) && k < n)
assert_upper(z, n, true);
}
}
}