public int image(int from) {
int cube = manager.getBDDCubeS();
Permutation perm = manager.getPermSp2S();
int sum = 0;
for (int i = 0; i < dp.getSize(); i++) {
int tmp = manager.ref(manager.relProd(from, dp.getBDDTWave(i), cube));
sum = manager.orTo(sum, tmp);
manager.deref(tmp);
}
int next = manager.ref(manager.replace(sum, perm));
manager.deref(sum);
return next;
}
public int forward(int bdd_initial) {
int qkk, qk = manager.ref(bdd_initial);
do {
qkk = qk;
int next = image(qk);
qk = manager.orTo(qk, next);
manager.deref(next);
} while (qkk != qk);
return qk;
}