Adds a sink state
        Args:
            alphabet (list): The input alphabet
        Returns:
            None

def init_from_acceptor_bycopying(self, acceptor):
        """
        Adds a sink state
        Args:
            alphabet (list): The input alphabet
        Returns:
            None
        """
        for state in acceptor.states:
            for arc in state.arcs:
                self.add_arc(state.stateid, arc.nextstate, acceptor.isyms.find(arc.ilabel))
            if state.final:
                print state.stateid,' is final'
                self[state.stateid].final = True;