YES Termination w.r.t. Q proof of /home/cern_httpd/provide/research/cycsrs/tpdb/TPDB-d9b80194f163/SRS_Standard/Zantema_04/z004.srs

(0) Obligation:

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

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

Q is empty.

(1) QTRS Reverse (EQUIVALENT transformation)

We applied the QTRS Reverse Processor [REVERSE].

(2) Obligation:

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

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

Q is empty.

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

The certificate found is represented by the following graph.

The certificate consists of the following enumerated nodes:

1, 4, 14, 15, 16, 17, 18, 19, 20, 21, 22, 32, 33, 34, 35, 36, 37, 38, 39, 40, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58

Node 1 is start node and node 4 is final node.

Those nodes are connected through the following edges:

  • 1 to 14 labelled a_1(0)
  • 1 to 18 labelled a_1(0)
  • 4 to 4 labelled #_1(0)
  • 14 to 15 labelled b_1(0)
  • 15 to 16 labelled a_1(0)
  • 16 to 17 labelled b_1(0)
  • 16 to 36 labelled a_1(1)
  • 17 to 4 labelled c_1(0)
  • 18 to 19 labelled b_1(0)
  • 19 to 20 labelled c_1(0)
  • 20 to 21 labelled b_1(0)
  • 21 to 22 labelled a_1(0)
  • 21 to 32 labelled a_1(1)
  • 22 to 4 labelled a_1(0)
  • 22 to 32 labelled a_1(1)
  • 32 to 33 labelled b_1(1)
  • 33 to 34 labelled a_1(1)
  • 34 to 35 labelled b_1(1)
  • 34 to 36 labelled a_1(1)
  • 34 to 45 labelled a_1(2)
  • 35 to 4 labelled c_1(1)
  • 35 to 34 labelled c_1(1)
  • 36 to 37 labelled b_1(1)
  • 37 to 38 labelled c_1(1)
  • 38 to 39 labelled b_1(1)
  • 39 to 40 labelled a_1(1)
  • 39 to 32 labelled a_1(1)
  • 39 to 50 labelled a_1(2)
  • 40 to 4 labelled a_1(1)
  • 40 to 32 labelled a_1(1)
  • 45 to 46 labelled b_1(2)
  • 46 to 47 labelled c_1(2)
  • 47 to 48 labelled b_1(2)
  • 48 to 49 labelled a_1(2)
  • 49 to 36 labelled a_1(2)
  • 49 to 45 labelled a_1(2)
  • 50 to 51 labelled b_1(2)
  • 51 to 52 labelled a_1(2)
  • 52 to 53 labelled b_1(2)
  • 52 to 45 labelled a_1(2)
  • 52 to 54 labelled a_1(3)
  • 53 to 34 labelled c_1(2)
  • 54 to 55 labelled b_1(3)
  • 55 to 56 labelled c_1(3)
  • 56 to 57 labelled b_1(3)
  • 57 to 58 labelled a_1(3)
  • 58 to 45 labelled a_1(3)

(4) YES