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throttel extract/ite rewriting to avoid perf-bug exposed in example from Lucas Cordeiro and Alessandro Trindade

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-12-07 17:54:49 +00:00
parent 9635ddd8fc
commit a20e68facc
3 changed files with 79 additions and 49 deletions
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1
src/smt/theory_seq.cpp
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@ -2396,6 +2396,7 @@ bool theory_seq::is_var(expr* a) const {
!m_util.str.is_string(a) &&
!m_util.str.is_unit(a) &&
!m_util.str.is_itos(a) &&
!m_util.str.is_extract(a) &&
!m.is_ite(a);
}