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Apply follow-up derive validation fixes

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copilot-swe-agent[bot] 2026-06-10 18:20:49 +00:00 • committed by GitHub
parent 00fcd3a36d
commit 4cd4d16868
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1 changed files with 3 additions and 2 deletions
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5
src/ast/rewriter/seq_derive.cpp
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@ -438,7 +438,7 @@ namespace seq {
else if (re().is_reverse(r, r1)) else if (re().is_reverse(r, r1))
result = r1; result = r1;
else if (re().is_concat(r, r1, r2)) else if (re().is_concat(r, r1, r2))
result = mk_concat(mk_regex_reverse(r2), mk_regex_reverse(r1)); result = re().mk_concat(mk_regex_reverse(r2), mk_regex_reverse(r1));
else if (m.is_ite(r, c, r1, r2)) else if (m.is_ite(r, c, r1, r2))
result = m.mk_ite(c, mk_regex_reverse(r1), mk_regex_reverse(r2)); result = m.mk_ite(c, mk_regex_reverse(r1), mk_regex_reverse(r2));
else if (re().is_union(r, r1, r2)) { else if (re().is_union(r, r1, r2)) {
@ -519,7 +519,8 @@ namespace seq {
m_br.mk_not(is_nullable(r1), result); m_br.mk_not(is_nullable(r1), result);
} }
else if (re().is_to_re(r, r1)) { else if (re().is_to_re(r, r1)) {
result = is_nullable(r1); SASSERT(u().is_seq(r1->get_sort()));
result = m.mk_eq(u().str.mk_empty(r1->get_sort()), r1);
} }
else if (m.is_ite(r, cond, r1, r2)) { else if (m.is_ite(r, cond, r1, r2)) {
m_br.mk_ite(cond, is_nullable(r1), is_nullable(r2), result); m_br.mk_ite(cond, is_nullable(r1), is_nullable(r2), result);