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update re simplification

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-15 10:11:39 +05:30
parent a295dd48dc
commit 150c5c283d
4 changed files with 95 additions and 4 deletions
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4
src/math/automata/automaton.h
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@ -105,6 +105,8 @@ public:
// create an automaton from initial state, final states, and moves
automaton(M& m, unsigned init, unsigned_vector const& final, moves const& mvs): m(m) {
m_init = init;
m_delta.push_back(moves());
m_delta_inv.push_back(moves());
for (unsigned i = 0; i < final.size(); ++i) {
add_to_final_states(final[i]);
}
@ -331,6 +333,7 @@ public:
// Src - ET -> dst - e -> dst1 => Src - ET -> dst1 if out_degree(dst) = 1,
//
void compress() {
SASSERT(!m_delta.empty());
for (unsigned i = 0; i < m_delta.size(); ++i) {
for (unsigned j = 0; j < m_delta[i].size(); ++j) {
move const& mv = m_delta[i][j];
@ -419,6 +422,7 @@ public:
}
}
}
SASSERT(!m_delta.empty());
while (true) {
SASSERT(!m_delta.empty());
unsigned src = m_delta.size() - 1;