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fix crash on arie branch

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2025-11-16 16:58:33 -08:00
parent b835bd4c92
commit 711572e73c
3 changed files with 24 additions and 29 deletions
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20
src/ast/rewriter/arith_rewriter.cpp
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@ -771,17 +771,7 @@ br_status arith_rewriter::mk_le_ge_eq_core(expr * arg1, expr * arg2, op_kind kin
}
}
if (m_util.is_idiv(arg1, t, e) && is_numeral(e, a1) && a1 > 0) {
// e > 0 => t div e ~ arg2 <=> e * (t div e) ~ e * arg2 <=> t - mod t e ~ e * arg2
if (is_numeral(arg2, a2) && a2 == 0 && (kind == LE || kind == GE)) {
switch (kind) {
case LE: result = m_util.mk_le(result, m_util.mk_mul(e, arg2)); return BR_REWRITE3;
case GE: result = m_util.mk_ge(result, m_util.mk_mul(e, arg2)); return BR_REWRITE3;
case EQ: result = m.mk_eq(result, m_util.mk_mul(e, arg2)); return BR_REWRITE3;
}
}
// generally: result = m_util.mk_sub(t, m_util.mk_mod(t, e));
}
if ((m_arith_lhs || m_arith_ineq_lhs) && is_numeral(arg2, a2) && is_neg_poly(arg1, new_arg1)) {
a2.neg();
new_arg2 = m_util.mk_numeral(a2, m_util.is_int(new_arg1));
@ -792,6 +782,14 @@ br_status arith_rewriter::mk_le_ge_eq_core(expr * arg1, expr * arg2, op_kind kin
}
}
else if (st == BR_DONE && arg1 == orig_arg1 && arg2 == orig_arg2) {
// e > 0 => t div e ~ arg2 <=> e * (t div e) ~ e * arg2 <=> t - mod t e ~ e * arg2
if (is_numeral(arg2, a2) && a2 == 0 && (kind == LE || kind == GE)) {
switch (kind) {
case LE: result = m_util.mk_le(result, m_util.mk_mul(e, arg2)); return BR_REWRITE3;
case GE: result = m_util.mk_ge(result, m_util.mk_mul(e, arg2)); return BR_REWRITE3;
case EQ: result = m.mk_eq(result, m_util.mk_mul(e, arg2)); return BR_REWRITE3;
}
}
// Nothing new; return BR_FAILED to avoid rewriting loops.
return BR_FAILED;
}