int i=len;
while (i>0) {
DFSATransition<Word, Integer> tr = bptrs.get(i);
DFSAState<Word, Integer> fromState = tr.getSource();
Word word = tr.getInput();
if (!word.word().equals(" "))
segmentedWords.add(0, word);
i = fromState.stateID();
}
if(DEBUG) {
// Print lattice density ([1,+inf[) : if equal to 1, it means