YES Termination w.r.t. Q proof of /home/cern_httpd/provide/research/cycsrs/tpdb/TPDB-d9b80194f163/SRS_Standard/Zantema_04/z007.srs

(0) Obligation:

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

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

Q is empty.

(1) RFCMatchBoundsTRSProof (EQUIVALENT transformation)

Termination of the TRS R could be shown with a Match Bound [MATCHBOUNDS1,MATCHBOUNDS2] of 3. This implies Q-termination of R.
The following rules were used to construct the certificate:

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

The certificate found is represented by the following graph.

The certificate consists of the following enumerated nodes:

3, 4, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35

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

Those nodes are connected through the following edges:

  • 3 to 19 labelled b_1(0)
  • 3 to 20 labelled a_1(0)
  • 3 to 23 labelled a_1(1)
  • 4 to 4 labelled #_1(0)
  • 19 to 4 labelled a_1(0)
  • 19 to 26 labelled b_1(1)
  • 19 to 27 labelled a_1(2)
  • 20 to 21 labelled a_1(0)
  • 21 to 22 labelled c_1(0)
  • 22 to 4 labelled b_1(0)
  • 22 to 23 labelled a_1(1)
  • 23 to 24 labelled a_1(1)
  • 24 to 25 labelled c_1(1)
  • 25 to 4 labelled b_1(1)
  • 25 to 23 labelled a_1(1)
  • 25 to 27 labelled b_1(1)
  • 25 to 30 labelled a_1(2)
  • 26 to 4 labelled a_1(1)
  • 26 to 26 labelled b_1(1)
  • 26 to 27 labelled a_1(2)
  • 27 to 28 labelled a_1(2)
  • 28 to 29 labelled c_1(2)
  • 29 to 4 labelled b_1(2)
  • 29 to 23 labelled a_1(1)
  • 29 to 27 labelled b_1(2)
  • 29 to 33 labelled a_1(3)
  • 30 to 31 labelled a_1(2)
  • 31 to 32 labelled c_1(2)
  • 32 to 28 labelled b_1(2)
  • 33 to 34 labelled a_1(3)
  • 34 to 35 labelled c_1(3)
  • 35 to 28 labelled b_1(3)

(2) YES