def_module_params('model_evaluator', 
                  export=True,
                  params=(max_memory_param(),
                          max_steps_param(),
                          ('completion', BOOL, False, 'assigns an interptetation to symbols that do not have one in the current model, when evaluating expressions in the current model'),
                          ('array_equalities', BOOL, True, 'evaluate array equalities'),
                          ('array_as_stores', BOOL, True, 'return array as a set of stores'),
                          ))