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bounds on loop expressions

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This commit is contained in:
Nikolaj Bjorner 2020-06-11 00:04:41 -07:00
parent b0da5409c1
commit 5a2b6d9c92
3 changed files with 26 additions and 8 deletions
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6
src/ast/rewriter/seq_rewriter.cpp
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@ -2452,6 +2452,12 @@ expr_ref seq_rewriter::mk_der_op_rec(decl_kind k, expr* a, expr* b) {
expr_ref seq_rewriter::mk_der_op(decl_kind k, expr* a, expr* b) {
expr_ref _a(a, m()), _b(b, m());
expr_ref result(m());
// Pre-simplification assumes that none of the
// transformations hide ite sub-terms,
// Rewriting that changes associativity of
// operators may hide ite sub-terms.
switch (k) {
case OP_RE_INTERSECT:
if (BR_FAILED != mk_re_inter0(a, b, result))