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align variable names with dimacs input

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-08 16:52:10 -08:00
parent 1bf934e53a
commit b02c698284
4 changed files with 15 additions and 11 deletions
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6
src/ast/rewriter/seq_rewriter.cpp
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@ -844,6 +844,10 @@ br_status seq_rewriter::mk_seq_index(expr* a, expr* b, expr* c, expr_ref& result
return BR_FAILED;
}
// (str.replace s t t') is the string obtained by replacing the first occurrence
// of t in s, if any, by t'. Note that if t is empty, the result is to prepend
// t' to s; also, if t does not occur in s then the result is s.
br_status seq_rewriter::mk_seq_replace(expr* a, expr* b, expr* c, expr_ref& result) {
zstring s1, s2, s3;
if (m_util.str.is_string(a, s1) && m_util.str.is_string(b, s2) &&
@ -855,7 +859,7 @@ br_status seq_rewriter::mk_seq_replace(expr* a, expr* b, expr* c, expr_ref& resu
result = a;
return BR_DONE;
}
if (m_util.str.is_string(b, s2) && s2.length() == 0) {
if (m_util.str.is_empty(b)) {
result = m_util.str.mk_concat(c, a);
return BR_REWRITE1;
}