def resetLivingState(self):
        """Only one Living State on the S0 of each StateRegister"""
        # TODO: add some test to control number of instanciation of LivingState
        # clean all living state on S0
        must_delete = []
        l = len(self.ls)
        for idx, ls in zip(range(l), self.ls):
            # TODO: alive by default on False, change to True on the first match
            ids = id(ls[1].thestate())
            if ids == id(ls[0]) and (ls[1].have_finish or not ls[1].alive):
                must_delete.append(idx)
            elif ls[1].alive:
                ls[1].alive = False
        for delete in reversed(must_delete):
            self.ls.pop(delete)
        self.init_all()
Only one Living State on the S0 of each StateRegister