YES Termination w.r.t. Q proof of /home/cern_httpd/provide/research/cycsrs/tpdb/TPDB-d9b80194f163/SRS_Standard/Zantema_04/z087.srs

(0) Obligation:

Q restricted rewrite system:
The TRS R consists of the following rules:

a(a(x)) → c(b(x))
b(b(x)) → a(c(x))
c(c(x)) → b(a(x))

Q is empty.

(1) RFCMatchBoundsTRSProof (EQUIVALENT transformation)

Termination of the TRS R could be shown with a Match Bound [MATCHBOUNDS1,MATCHBOUNDS2] of 1. This implies Q-termination of R.
The following rules were used to construct the certificate:

a(a(x)) → c(b(x))
b(b(x)) → a(c(x))
c(c(x)) → b(a(x))

The certificate found is represented by the following graph.

The certificate consists of the following enumerated nodes:

3, 4, 6, 8, 9, 11, 14, 15

Node 3 is start node and node 4 is final node.

Those nodes are connected through the following edges:

  • 3 to 6 labelled c_1(0)
  • 3 to 8 labelled a_1(0)
  • 3 to 9 labelled b_1(0)
  • 4 to 4 labelled #_1(0)
  • 6 to 4 labelled b_1(0)
  • 6 to 11 labelled a_1(1)
  • 8 to 4 labelled c_1(0)
  • 8 to 14 labelled b_1(1)
  • 9 to 4 labelled a_1(0)
  • 9 to 15 labelled c_1(1)
  • 11 to 4 labelled c_1(1)
  • 11 to 14 labelled b_1(1)
  • 14 to 4 labelled a_1(1)
  • 14 to 15 labelled c_1(1)
  • 15 to 4 labelled b_1(1)
  • 15 to 11 labelled a_1(1)

(2) YES