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fix back rewriting for concat

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-14 11:22:11 +01:00
parent de9c959241
commit 3ff97357a3
2 changed files with 23 additions and 7 deletions
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12
src/math/automata/automaton.h
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@ -543,8 +543,16 @@ private:
void add(move const& mv) {
m_delta[mv.src()].push_back(mv);
m_delta_inv[mv.dst()].push_back(mv);
if (!is_duplicate_cheap(mv)) {
m_delta[mv.src()].push_back(mv);
m_delta_inv[mv.dst()].push_back(mv);
}
}
bool is_duplicate_cheap(move const& mv) const {
if (m_delta[mv.src()].empty()) return false;
move const& mv0 = m_delta[mv.src()].back();
return mv0.src() == mv.src() && mv0.dst() == mv.dst() && mv0.t() == mv.t();
}