theorem CommunicativeArithmeticGuard.selectedBackend.eq_2
theorem CommunicativeArithmeticGuard.selectedBackend.eq_2: j81b1gmr.CommunicativeArithmeticGuard.selectedBackend j81b1gmr.CommunicativeArithmeticGuard.Boundary.persisted = j81b1gmr.CommunicativeArithmeticGuard.Backend.exact