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parameter eval order

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2025-10-07 10:26:40 -07:00 • committed by Nikolaj Bjorner
parent e75da050d2
commit 6bca12d399
1 changed files with 7 additions and 3 deletions
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10
src/ast/rewriter/seq_rewriter.cpp
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@ -1890,7 +1890,10 @@ br_status seq_rewriter::mk_seq_map(expr* f, expr* seqA, expr_ref& result) {
return BR_REWRITE2; return BR_REWRITE2;
} }
if (str().is_concat(seqA, s1, s2)) { if (str().is_concat(seqA, s1, s2)) {
result = str().mk_concat(str().mk_map(f, s1), str().mk_map(f, s2)); // introduce temporaries to ensure deterministic evaluation order of recursive map calls
auto m1 = str().mk_map(f, s1);
auto m2 = str().mk_map(f, s2);
result = str().mk_concat(m1, m2);
return BR_REWRITE2; return BR_REWRITE2;
} }
return BR_FAILED; return BR_FAILED;
@ -1910,8 +1913,9 @@ br_status seq_rewriter::mk_seq_mapi(expr* f, expr* i, expr* seqA, expr_ref& resu
} }
if (str().is_concat(seqA, s1, s2)) { if (str().is_concat(seqA, s1, s2)) {
expr_ref j(m_autil.mk_add(i, str().mk_length(s1)), m()); expr_ref j(m_autil.mk_add(i, str().mk_length(s1)), m());
auto a = str().mk_mapi(f, i, s1); auto left = str().mk_mapi(f, i, s1);
result = str().mk_concat(a, str().mk_mapi(f, j, s2)); auto right = str().mk_mapi(f, j, s2);
result = str().mk_concat(left, right);
return BR_REWRITE2; return BR_REWRITE2;
} }
return BR_FAILED; return BR_FAILED;