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disable match_non_max and match_non_zero

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-12-24 15:19:37 -08:00
parent e978b81c7a
commit 49a7f8446d
3 changed files with 12 additions and 4 deletions
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10
src/math/polysat/viable.cpp
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@ -172,9 +172,17 @@ namespace polysat {
// NSB review:
// the bounds added by x < p and p < x in forbidden_intervals
// match_non_max
// match_non_max, match_non_zero
// use values that are approximations. Then the propagations in
// try_assign_eval are incorrect.
// For example, x > p means x has forbidden interval [0, p + 1[,
// the numeric interval is [0, 1[, but p + 1 == 1 is not ensured
// even p may have free variables.
// the proper side condition on p + 1 is -1 > p or -2 >= p or p + 1 != 0
// I am disabling match_non_max and match_non_zero from forbidden_interval
// The narrowing rules in ule_constraint already handle the bounds propagaitons
// as it propagates p != -1 and 0 != q (p < -1, q > 0),
//
for (auto const& c : get_constraints(v)) {
s.try_assign_eval(c);