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tweak bound propagation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2025-11-03 12:41:33 -08:00
parent 88269edd4b
commit 4828ed97be
3 changed files with 13 additions and 3 deletions
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1
src/ast/rewriter/arith_rewriter.cpp
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@ -1627,7 +1627,6 @@ br_status arith_rewriter::mk_lshr_core(unsigned sz, expr* arg1, expr* arg2, expr
if (is_num_y) {
result = m_util.mk_mod(arg1, m_util.mk_int(N));
//result = arg1; // unsound
result = m_util.mk_idiv(result, m_util.mk_int(rational::power_of_two(y.get_unsigned())));
return BR_DONE;
}

12
src/smt/theory_lra.cpp
View file

@ -2702,7 +2702,13 @@ public:
api_bound* lo_inf = end, *lo_sup = end;
api_bound* hi_inf = end, *hi_sup = end;
for (api_bound* other : bounds) {
// todo: use a different data-structure for bounds that makes indexing fast?
// for example a B-tree.
unsigned count = 0;
unsigned start = ctx().get_random_value();
for (unsigned i = 0; i < bounds.size(); ++i) {
auto j = (i + start) % bounds.size();
auto other = bounds[j];
if (other == &b) continue;
if (b.get_lit() == other->get_lit()) continue;
lp_api::bound_kind kind2 = other->get_bound_kind();
@ -2711,6 +2717,9 @@ public:
// the bounds are equivalent.
continue;
}
++count;
if (count > 10)
break;
SASSERT(k1 != k2 || kind1 != kind2);
if (kind2 == lp_api::lower_t) {
@ -2732,6 +2741,7 @@ public:
hi_sup = other;
}
}
// verbose_stream() << bounds.size() << "\n";
if (lo_inf != end) mk_bound_axiom(b, *lo_inf);
if (lo_sup != end) mk_bound_axiom(b, *lo_sup);
if (hi_inf != end) mk_bound_axiom(b, *hi_inf);

3
src/tactic/smtlogics/qflia_tactic.cpp
View file

@ -202,7 +202,8 @@ tactic * mk_preamble_tactic(ast_manager& m) {
mk_simplify_tactic(m),
mk_propagate_values_tactic(m),
using_params(mk_ctx_simplify_tactic(m), ctx_simp_p),
using_params(mk_simplify_tactic(m), pull_ite_p),
using_params(mk_simplify_tactic(m), pull_ite_p),
mk_propagate_ineqs_tactic(m),
mk_solve_eqs_tactic(m),
mk_lia2card_tactic(m, lia2card_p),
mk_elim_uncnstr_tactic(m));