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Lev's fixes
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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@ -4996,6 +4996,7 @@ void theory_seq::add_extract_axiom(expr* e) {
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TRACE("seq", tout << mk_pp(e, m) << "\n";);
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expr* s = nullptr, *i = nullptr, *l = nullptr;
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VERIFY(m_util.str.is_extract(e, s, i, l));
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#if 0
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if (is_tail(s, i, l)) {
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add_tail_axiom(e, s);
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return;
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@ -5012,6 +5013,7 @@ void theory_seq::add_extract_axiom(expr* e) {
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add_extract_suffix_axiom(e, s, i);
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return;
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}
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#endif
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expr_ref x(mk_skolem(m_pre, s, i), m);
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expr_ref ls = mk_len(s);
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expr_ref lx = mk_len(x);
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