'Try to define the cut with a relaxed algorithm based on two different
http requests.
:return : True if vuln can be exploited and the information extracted'

def _guess_with_diff(self, vuln_obj):

    orig_mutant = vuln_obj.get_mutant()
    copy_mutant = copy.deepcopy(orig_mutant)
    copy_mutant.set_token_value('/do/not/exist')
    try:
        response_a = self._uri_opener.send_mutant(orig_mutant)
        response_b = self._uri_opener.send_mutant(copy_mutant)
    except BaseFrameworkException as e:
        om.out.error(str(e))
        return False
    else:
        if self._guess_cut(response_a.get_body(), response_b.get_body(), vuln_obj['file_pattern']):
            return True
        else:
            return False
