Make a copy of this simulation manager. Pass ``deep=True`` to copy all the states in it as well.

def copy(self, deep=False): # pylint: disable=arguments-differ
        """
        Make a copy of this simulation manager. Pass ``deep=True`` to copy all the states in it as well.
        """
        simgr = SimulationManager(self._project,
                                  stashes=self._copy_stashes(deep=deep),
                                  hierarchy=self._hierarchy,
                                  resilience=self._resilience,
                                  auto_drop=self._auto_drop,
                                  completion_mode=self.completion_mode,
                                  errored=self._errored)
        return simgr