NO Nontermination Proof

Nontermination Proof

by ttt2 (version ttt2 1.15)

Input

The rewrite relation of the following TRS is considered.

Begin(a12(a34(a34(x0)))) Wait(Right1(x0))
Begin(a34(a34(x0))) Wait(Right2(x0))
Begin(a34(x0)) Wait(Right3(x0))
Begin(a12(a45(a45(x0)))) Wait(Right4(x0))
Begin(a45(a45(x0))) Wait(Right5(x0))
Begin(a45(x0)) Wait(Right6(x0))
Begin(a12(a56(a56(x0)))) Wait(Right7(x0))
Begin(a56(a56(x0))) Wait(Right8(x0))
Begin(a56(x0)) Wait(Right9(x0))
Begin(a23(a45(a45(x0)))) Wait(Right10(x0))
Begin(a45(a45(x0))) Wait(Right11(x0))
Begin(a45(x0)) Wait(Right12(x0))
Begin(a23(a56(a56(x0)))) Wait(Right13(x0))
Begin(a56(a56(x0))) Wait(Right14(x0))
Begin(a56(x0)) Wait(Right15(x0))
Begin(a34(a56(a56(x0)))) Wait(Right16(x0))
Begin(a56(a56(x0))) Wait(Right17(x0))
Begin(a56(x0)) Wait(Right18(x0))
Right1(a12(End(x0))) Left(a34(a34(a12(a12(End(x0))))))
Right2(a12(a12(End(x0)))) Left(a34(a34(a12(a12(End(x0))))))
Right3(a12(a12(a34(End(x0))))) Left(a34(a34(a12(a12(End(x0))))))
Right4(a12(End(x0))) Left(a45(a45(a12(a12(End(x0))))))
Right5(a12(a12(End(x0)))) Left(a45(a45(a12(a12(End(x0))))))
Right6(a12(a12(a45(End(x0))))) Left(a45(a45(a12(a12(End(x0))))))
Right7(a12(End(x0))) Left(a56(a56(a12(a12(End(x0))))))
Right8(a12(a12(End(x0)))) Left(a56(a56(a12(a12(End(x0))))))
Right9(a12(a12(a56(End(x0))))) Left(a56(a56(a12(a12(End(x0))))))
Right10(a23(End(x0))) Left(a45(a45(a23(a23(End(x0))))))
Right11(a23(a23(End(x0)))) Left(a45(a45(a23(a23(End(x0))))))
Right12(a23(a23(a45(End(x0))))) Left(a45(a45(a23(a23(End(x0))))))
Right13(a23(End(x0))) Left(a56(a56(a23(a23(End(x0))))))
Right14(a23(a23(End(x0)))) Left(a56(a56(a23(a23(End(x0))))))
Right15(a23(a23(a56(End(x0))))) Left(a56(a56(a23(a23(End(x0))))))
Right16(a34(End(x0))) Left(a56(a56(a34(a34(End(x0))))))
Right17(a34(a34(End(x0)))) Left(a56(a56(a34(a34(End(x0))))))
Right18(a34(a34(a56(End(x0))))) Left(a56(a56(a34(a34(End(x0))))))
Right1(a12(x0)) Aa12(Right1(x0))
Right2(a12(x0)) Aa12(Right2(x0))
Right3(a12(x0)) Aa12(Right3(x0))
Right4(a12(x0)) Aa12(Right4(x0))
Right5(a12(x0)) Aa12(Right5(x0))
Right6(a12(x0)) Aa12(Right6(x0))
Right7(a12(x0)) Aa12(Right7(x0))
Right8(a12(x0)) Aa12(Right8(x0))
Right9(a12(x0)) Aa12(Right9(x0))
Right10(a12(x0)) Aa12(Right10(x0))
Right11(a12(x0)) Aa12(Right11(x0))
Right12(a12(x0)) Aa12(Right12(x0))
Right13(a12(x0)) Aa12(Right13(x0))
Right14(a12(x0)) Aa12(Right14(x0))
Right15(a12(x0)) Aa12(Right15(x0))
Right16(a12(x0)) Aa12(Right16(x0))
Right17(a12(x0)) Aa12(Right17(x0))
Right18(a12(x0)) Aa12(Right18(x0))
Right1(a34(x0)) Aa34(Right1(x0))
Right2(a34(x0)) Aa34(Right2(x0))
Right3(a34(x0)) Aa34(Right3(x0))
Right4(a34(x0)) Aa34(Right4(x0))
Right5(a34(x0)) Aa34(Right5(x0))
Right6(a34(x0)) Aa34(Right6(x0))
Right7(a34(x0)) Aa34(Right7(x0))
Right8(a34(x0)) Aa34(Right8(x0))
Right9(a34(x0)) Aa34(Right9(x0))
Right10(a34(x0)) Aa34(Right10(x0))
Right11(a34(x0)) Aa34(Right11(x0))
Right12(a34(x0)) Aa34(Right12(x0))
Right13(a34(x0)) Aa34(Right13(x0))
Right14(a34(x0)) Aa34(Right14(x0))
Right15(a34(x0)) Aa34(Right15(x0))
Right16(a34(x0)) Aa34(Right16(x0))
Right17(a34(x0)) Aa34(Right17(x0))
Right18(a34(x0)) Aa34(Right18(x0))
Right1(a45(x0)) Aa45(Right1(x0))
Right2(a45(x0)) Aa45(Right2(x0))
Right3(a45(x0)) Aa45(Right3(x0))
Right4(a45(x0)) Aa45(Right4(x0))
Right5(a45(x0)) Aa45(Right5(x0))
Right6(a45(x0)) Aa45(Right6(x0))
Right7(a45(x0)) Aa45(Right7(x0))
Right8(a45(x0)) Aa45(Right8(x0))
Right9(a45(x0)) Aa45(Right9(x0))
Right10(a45(x0)) Aa45(Right10(x0))
Right11(a45(x0)) Aa45(Right11(x0))
Right12(a45(x0)) Aa45(Right12(x0))
Right13(a45(x0)) Aa45(Right13(x0))
Right14(a45(x0)) Aa45(Right14(x0))
Right15(a45(x0)) Aa45(Right15(x0))
Right16(a45(x0)) Aa45(Right16(x0))
Right17(a45(x0)) Aa45(Right17(x0))
Right18(a45(x0)) Aa45(Right18(x0))
Right1(a56(x0)) Aa56(Right1(x0))
Right2(a56(x0)) Aa56(Right2(x0))
Right3(a56(x0)) Aa56(Right3(x0))
Right4(a56(x0)) Aa56(Right4(x0))
Right5(a56(x0)) Aa56(Right5(x0))
Right6(a56(x0)) Aa56(Right6(x0))
Right7(a56(x0)) Aa56(Right7(x0))
Right8(a56(x0)) Aa56(Right8(x0))
Right9(a56(x0)) Aa56(Right9(x0))
Right10(a56(x0)) Aa56(Right10(x0))
Right11(a56(x0)) Aa56(Right11(x0))
Right12(a56(x0)) Aa56(Right12(x0))
Right13(a56(x0)) Aa56(Right13(x0))
Right14(a56(x0)) Aa56(Right14(x0))
Right15(a56(x0)) Aa56(Right15(x0))
Right16(a56(x0)) Aa56(Right16(x0))
Right17(a56(x0)) Aa56(Right17(x0))
Right18(a56(x0)) Aa56(Right18(x0))
Right1(a23(x0)) Aa23(Right1(x0))
Right2(a23(x0)) Aa23(Right2(x0))
Right3(a23(x0)) Aa23(Right3(x0))
Right4(a23(x0)) Aa23(Right4(x0))
Right5(a23(x0)) Aa23(Right5(x0))
Right6(a23(x0)) Aa23(Right6(x0))
Right7(a23(x0)) Aa23(Right7(x0))
Right8(a23(x0)) Aa23(Right8(x0))
Right9(a23(x0)) Aa23(Right9(x0))
Right10(a23(x0)) Aa23(Right10(x0))
Right11(a23(x0)) Aa23(Right11(x0))
Right12(a23(x0)) Aa23(Right12(x0))
Right13(a23(x0)) Aa23(Right13(x0))
Right14(a23(x0)) Aa23(Right14(x0))
Right15(a23(x0)) Aa23(Right15(x0))
Right16(a23(x0)) Aa23(Right16(x0))
Right17(a23(x0)) Aa23(Right17(x0))
Right18(a23(x0)) Aa23(Right18(x0))
Aa12(Left(x0)) Left(a12(x0))
Aa34(Left(x0)) Left(a34(x0))
Aa45(Left(x0)) Left(a45(x0))
Aa56(Left(x0)) Left(a56(x0))
Aa23(Left(x0)) Left(a23(x0))
Wait(Left(x0)) Begin(x0)
a12(a12(a34(a34(x0)))) a34(a34(a12(a12(x0))))
a12(a12(a45(a45(x0)))) a45(a45(a12(a12(x0))))
a12(a12(a56(a56(x0)))) a56(a56(a12(a12(x0))))
a23(a23(a45(a45(x0)))) a45(a45(a23(a23(x0))))
a23(a23(a56(a56(x0)))) a56(a56(a23(a23(x0))))
a34(a34(a56(a56(x0)))) a56(a56(a34(a34(x0))))

Proof

1 Loop

The following loop proves nontermination.

t0 = Begin(a34(a34(a12(a12(End(x53012))))))
ε Wait(Right2(a12(a12(End(x53012)))))
1 Wait(Left(a34(a34(a12(a12(End(x53012)))))))
ε Begin(a34(a34(a12(a12(End(x53012))))))
= t3
where t3 = t0σ and σ = {x53012/x53012}