MAYBE
by ttt2 (version ttt2 1.15)
The rewrite relation of the following TRS is considered.
| Begin(b(x0)) | → | Wait(Right1(x0)) | 
| Begin(b(x0)) | → | Wait(Right2(x0)) | 
| Begin(b(x0)) | → | Wait(Right3(x0)) | 
| Begin(a(x0)) | → | Wait(Right4(x0)) | 
| Right1(c(End(x0))) | → | Left(d(End(x0))) | 
| Right2(e(End(x0))) | → | Left(c(c(End(x0)))) | 
| Right3(d(End(x0))) | → | Left(b(f(End(x0)))) | 
| Right4(a(End(x0))) | → | Left(f(End(x0))) | 
| Right1(a(x0)) | → | Aa(Right1(x0)) | 
| Right2(a(x0)) | → | Aa(Right2(x0)) | 
| Right3(a(x0)) | → | Aa(Right3(x0)) | 
| Right4(a(x0)) | → | Aa(Right4(x0)) | 
| Right1(b(x0)) | → | Ab(Right1(x0)) | 
| Right2(b(x0)) | → | Ab(Right2(x0)) | 
| Right3(b(x0)) | → | Ab(Right3(x0)) | 
| Right4(b(x0)) | → | Ab(Right4(x0)) | 
| Right1(c(x0)) | → | Ac(Right1(x0)) | 
| Right2(c(x0)) | → | Ac(Right2(x0)) | 
| Right3(c(x0)) | → | Ac(Right3(x0)) | 
| Right4(c(x0)) | → | Ac(Right4(x0)) | 
| Right1(d(x0)) | → | Ad(Right1(x0)) | 
| Right2(d(x0)) | → | Ad(Right2(x0)) | 
| Right3(d(x0)) | → | Ad(Right3(x0)) | 
| Right4(d(x0)) | → | Ad(Right4(x0)) | 
| Right1(e(x0)) | → | Ae(Right1(x0)) | 
| Right2(e(x0)) | → | Ae(Right2(x0)) | 
| Right3(e(x0)) | → | Ae(Right3(x0)) | 
| Right4(e(x0)) | → | Ae(Right4(x0)) | 
| Right1(f(x0)) | → | Af(Right1(x0)) | 
| Right2(f(x0)) | → | Af(Right2(x0)) | 
| Right3(f(x0)) | → | Af(Right3(x0)) | 
| Right4(f(x0)) | → | Af(Right4(x0)) | 
| Aa(Left(x0)) | → | Left(a(x0)) | 
| Ab(Left(x0)) | → | Left(b(x0)) | 
| Ac(Left(x0)) | → | Left(c(x0)) | 
| Ad(Left(x0)) | → | Left(d(x0)) | 
| Ae(Left(x0)) | → | Left(e(x0)) | 
| Af(Left(x0)) | → | Left(f(x0)) | 
| Wait(Left(x0)) | → | Begin(x0) | 
| a(x0) | → | b(b(x0)) | 
| c(b(x0)) | → | d(x0) | 
| e(b(x0)) | → | c(c(x0)) | 
| d(b(x0)) | → | b(f(x0)) | 
| f(x0) | → | a(e(x0)) | 
| c(x0) | → | x0 | 
| a(a(x0)) | → | f(x0) | 
| Begin(b(x0)) | → | Wait(Right1(x0)) | 
| Begin(b(x0)) | → | Wait(Right2(x0)) | 
| Begin(b(x0)) | → | Wait(Right3(x0)) | 
| Begin(a(x0)) | → | Wait(Right4(x0)) | 
| Right1(c(End(x0))) | → | Left(d(End(x0))) | 
| Right2(e(End(x0))) | → | Left(c(c(End(x0)))) | 
| Right3(d(End(x0))) | → | Left(b(f(End(x0)))) | 
| Right4(a(End(x0))) | → | Left(f(End(x0))) | 
| Right1(a(x0)) | → | Aa(Right1(x0)) | 
| Right2(a(x0)) | → | Aa(Right2(x0)) | 
| Right3(a(x0)) | → | Aa(Right3(x0)) | 
| Right4(a(x0)) | → | Aa(Right4(x0)) | 
| Right1(b(x0)) | → | Ab(Right1(x0)) | 
| Right2(b(x0)) | → | Ab(Right2(x0)) | 
| Right3(b(x0)) | → | Ab(Right3(x0)) | 
| Right4(b(x0)) | → | Ab(Right4(x0)) | 
| Right1(c(x0)) | → | Ac(Right1(x0)) | 
| Right2(c(x0)) | → | Ac(Right2(x0)) | 
| Right3(c(x0)) | → | Ac(Right3(x0)) | 
| Right4(c(x0)) | → | Ac(Right4(x0)) | 
| Right1(d(x0)) | → | Ad(Right1(x0)) | 
| Right2(d(x0)) | → | Ad(Right2(x0)) | 
| Right3(d(x0)) | → | Ad(Right3(x0)) | 
| Right4(d(x0)) | → | Ad(Right4(x0)) | 
| Right1(e(x0)) | → | Ae(Right1(x0)) | 
| Right2(e(x0)) | → | Ae(Right2(x0)) | 
| Right3(e(x0)) | → | Ae(Right3(x0)) | 
| Right4(e(x0)) | → | Ae(Right4(x0)) | 
| Right1(f(x0)) | → | Af(Right1(x0)) | 
| Right2(f(x0)) | → | Af(Right2(x0)) | 
| Right3(f(x0)) | → | Af(Right3(x0)) | 
| Right4(f(x0)) | → | Af(Right4(x0)) | 
| Aa(Left(x0)) | → | Left(a(x0)) | 
| Ab(Left(x0)) | → | Left(b(x0)) | 
| Ac(Left(x0)) | → | Left(c(x0)) | 
| Ad(Left(x0)) | → | Left(d(x0)) | 
| Ae(Left(x0)) | → | Left(e(x0)) | 
| Af(Left(x0)) | → | Left(f(x0)) | 
| Wait(Left(x0)) | → | Begin(x0) | 
| a(x0) | → | b(b(x0)) | 
| c(b(x0)) | → | d(x0) | 
| e(b(x0)) | → | c(c(x0)) | 
| d(b(x0)) | → | b(f(x0)) | 
| f(x0) | → | a(e(x0)) | 
| c(x0) | → | x0 | 
| a(a(x0)) | → | f(x0) |