YES Termination w.r.t. Q proof of /home/cern_httpd/provide/research/cycsrs/tpdb/TPDB-d9b80194f163/SRS_Standard/Zantema_04/z051.srs

(0) Obligation:

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

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

Q is empty.

(1) RFCMatchBoundsTRSProof (EQUIVALENT transformation)

Termination of the TRS R could be shown with a Match Bound [MATCHBOUNDS1,MATCHBOUNDS2] of 2. This implies Q-termination of R.
The following rules were used to construct the certificate:

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

The certificate found is represented by the following graph.

The certificate consists of the following enumerated nodes:

1, 3, 5, 6, 7, 8, 9, 10, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46

Node 1 is start node and node 3 is final node.

Those nodes are connected through the following edges:

  • 1 to 5 labelled a_1(0)
  • 3 to 3 labelled #_1(0)
  • 5 to 6 labelled a_1(0)
  • 6 to 7 labelled b_1(0)
  • 6 to 29 labelled a_1(1)
  • 7 to 8 labelled b_1(0)
  • 7 to 23 labelled a_1(1)
  • 8 to 9 labelled b_1(0)
  • 8 to 17 labelled a_1(1)
  • 9 to 10 labelled a_1(0)
  • 10 to 3 labelled a_1(0)
  • 17 to 18 labelled a_1(1)
  • 18 to 19 labelled b_1(1)
  • 18 to 41 labelled a_1(2)
  • 19 to 20 labelled b_1(1)
  • 19 to 35 labelled a_1(2)
  • 20 to 21 labelled b_1(1)
  • 20 to 17 labelled a_1(1)
  • 21 to 22 labelled a_1(1)
  • 22 to 3 labelled a_1(1)
  • 23 to 24 labelled a_1(1)
  • 24 to 25 labelled b_1(1)
  • 25 to 26 labelled b_1(1)
  • 26 to 27 labelled b_1(1)
  • 27 to 28 labelled a_1(1)
  • 28 to 20 labelled a_1(1)
  • 29 to 30 labelled a_1(1)
  • 30 to 31 labelled b_1(1)
  • 31 to 32 labelled b_1(1)
  • 32 to 33 labelled b_1(1)
  • 33 to 34 labelled a_1(1)
  • 34 to 26 labelled a_1(1)
  • 35 to 36 labelled a_1(2)
  • 36 to 37 labelled b_1(2)
  • 37 to 38 labelled b_1(2)
  • 38 to 39 labelled b_1(2)
  • 39 to 40 labelled a_1(2)
  • 40 to 20 labelled a_1(2)
  • 41 to 42 labelled a_1(2)
  • 42 to 43 labelled b_1(2)
  • 43 to 44 labelled b_1(2)
  • 44 to 45 labelled b_1(2)
  • 45 to 46 labelled a_1(2)
  • 46 to 38 labelled a_1(2)

(2) YES