YES Termination w.r.t. Q proof of /home/cern_httpd/provide/research/cycsrs/tpdb/TPDB-d9b80194f163/SRS_Standard/Secret_05_SRS/jambox1.srs

Termination w.r.t. Q of the given QTRS could be proven:

0 QTRS
↳1 QTRS Reverse (⇔, 0 ms)
↳2 QTRS
↳3 FlatCCProof (⇔, 0 ms)
↳4 QTRS
↳5 RootLabelingProof (⇔, 0 ms)
↳6 QTRS
↳7 QTRSRRRProof (⇔, 12 ms)
↳8 QTRS
↳9 DependencyPairsProof (⇔, 0 ms)
↳10 QDP
↳11 DependencyGraphProof (⇔, 0 ms)
↳12 AND
    ↳13 QDP
        ↳14 UsableRulesProof (⇔, 0 ms)
        ↳15 QDP
        ↳16 QDPSizeChangeProof (⇔, 0 ms)
        ↳17 YES
    ↳18 QDP
        ↳19 QDPOrderProof (⇔, 343 ms)
        ↳20 QDP
        ↳21 QDPOrderProof (⇔, 17 ms)
        ↳22 QDP
        ↳23 QDPOrderProof (⇔, 16 ms)
        ↳24 QDP
        ↳25 PisEmptyProof (⇔, 0 ms)
        ↳26 YES

(0) Obligation:

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

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

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

Q is empty.

(3) FlatCCProof (EQUIVALENT transformation)

We used flat context closure [ROOTLAB] As Q is empty the flat context closure was sound AND complete.

(4) Obligation:

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

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

Q is empty.

(5) RootLabelingProof (EQUIVALENT transformation)

We used plain root labeling [ROOTLAB] with the following heuristic: LabelAll: All function symbols get labeled
As Q is empty the root labeling was sound AND complete.

(6) Obligation:

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

c_{b_1}(b_{c_1}(c_{a_1}(a_{c_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{c_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
a_{c_1}(c_{a_1}(a_{c_1}(x))) → a_{a_1}(a_{c_1}(x))
a_{c_1}(c_{a_1}(a_{b_1}(x))) → a_{a_1}(a_{b_1}(x))
a_{c_1}(c_{a_1}(a_{a_1}(x))) → a_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
a_{c_1}(c_{c_1}(x)) → a_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
a_{c_1}(c_{b_1}(x)) → a_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
a_{c_1}(c_{a_1}(x)) → a_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.

(7) QTRSRRRProof (EQUIVALENT transformation)

Used ordering:
Polynomial interpretation [POLO]:

POL(a_{a_1}(x1)) = x1   
POL(a_{b_1}(x1)) = x1   
POL(a_{c_1}(x1)) = 1 + x1   
POL(b_{a_1}(x1)) = x1   
POL(b_{b_1}(x1)) = x1   
POL(b_{c_1}(x1)) = x1   
POL(c_{a_1}(x1)) = x1   
POL(c_{b_1}(x1)) = x1   
POL(c_{c_1}(x1)) = x1   
With this ordering the following rules can be removed by the rule removal processor [LPAR04] because they are oriented strictly:

c_{b_1}(b_{c_1}(c_{a_1}(a_{c_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{c_1}(x))))
a_{c_1}(c_{a_1}(a_{c_1}(x))) → a_{a_1}(a_{c_1}(x))
a_{c_1}(c_{a_1}(a_{b_1}(x))) → a_{a_1}(a_{b_1}(x))
a_{c_1}(c_{a_1}(a_{a_1}(x))) → a_{a_1}(a_{a_1}(x))
a_{c_1}(c_{c_1}(x)) → a_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
a_{c_1}(c_{b_1}(x)) → a_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
a_{c_1}(c_{a_1}(x)) → a_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))


(8) Obligation:

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

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.

(9) DependencyPairsProof (EQUIVALENT transformation)

Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem.

(10) Obligation:

Q DP problem:
The TRS P consists of the following rules:

C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{C_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(b_{c_1}(c_{b_1}(x)))
C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → B_{C_1}(c_{b_1}(x))
C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(x)
C_{B_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → C_{C_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
C_{B_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → C_{B_1}(b_{c_1}(c_{a_1}(x)))
C_{B_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → B_{C_1}(c_{a_1}(x))
C_{C_1}(c_{c_1}(x)) → B_{C_1}(x)
B_{C_1}(c_{c_1}(x)) → B_{C_1}(x)

The TRS R consists of the following rules:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(11) DependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 2 SCCs with 5 less nodes.

(12) Complex Obligation (AND)

(13) Obligation:

Q DP problem:
The TRS P consists of the following rules:

B_{C_1}(c_{c_1}(x)) → B_{C_1}(x)

The TRS R consists of the following rules:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(14) UsableRulesProof (EQUIVALENT transformation)

We can use the usable rules and reduction pair processor [LPAR04] with the Ce-compatible extension of the polynomial order that maps every function symbol to the sum of its arguments. Then, we can delete all non-usable rules [FROCOS05] from R.

(15) Obligation:

Q DP problem:
The TRS P consists of the following rules:

B_{C_1}(c_{c_1}(x)) → B_{C_1}(x)

R is empty.
Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(16) QDPSizeChangeProof (EQUIVALENT transformation)

By using the subterm criterion [SUBTERM_CRITERION] together with the size-change analysis [AAECC05] we have proven that there are no infinite chains for this DP problem.

From the DPs we obtained the following set of size-change graphs:

  • B_{C_1}(c_{c_1}(x)) → B_{C_1}(x)
    The graph contains the following edges 1 > 1

(17) YES

(18) Obligation:

Q DP problem:
The TRS P consists of the following rules:

C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(x)
C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(b_{c_1}(c_{b_1}(x)))
C_{B_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → C_{B_1}(b_{c_1}(c_{a_1}(x)))

The TRS R consists of the following rules:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(19) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04,JAR06].


The following pairs can be oriented strictly and are deleted.


C_{B_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → C_{B_1}(b_{c_1}(c_{a_1}(x)))
The remaining pairs can at least be oriented weakly.
Used ordering: Matrix interpretation [MATRO] with arctic natural numbers [ARCTIC]:

POL(C_{B_1}(x1)) = 0A +
[0A,-I,-I]
·x1

POL(b_{c_1}(x1)) =
/0A\
|0A|
\0A/
 +
/-I-I0A\
|0A0A0A|
\-I0A0A/
·x1

POL(c_{a_1}(x1)) =
/0A\
|1A|
\0A/
 +
/-I0A0A\
|0A-I-I|
\-I0A0A/
·x1

POL(a_{b_1}(x1)) =
/0A\
|0A|
\0A/
 +
/0A0A1A\
|0A-I0A|
\-I-I-I/
·x1

POL(c_{b_1}(x1)) =
/1A\
|0A|
\0A/
 +
/1A-I0A\
|-I-I0A|
\-I-I0A/
·x1

POL(a_{a_1}(x1)) =
/0A\
|1A|
\0A/
 +
/-I0A0A\
|0A0A1A|
\0A1A0A/
·x1

POL(c_{c_1}(x1)) =
/0A\
|1A|
\0A/
 +
/0A1A1A\
|-I0A0A|
\0A0A0A/
·x1

POL(a_{c_1}(x1)) =
/-I\
|0A|
\-I/
 +
/0A0A0A\
|-I-I-I|
\-I-I-I/
·x1

POL(b_{a_1}(x1)) =
/0A\
|0A|
\-I/
 +
/-I-I-I\
|-I-I-I|
\-I-I-I/
·x1

POL(b_{b_1}(x1)) =
/0A\
|0A|
\-I/
 +
/-I-I-I\
|0A-I-I|
\-I-I-I/
·x1

The following usable rules [FROCOS05] with respect to the argument filtering of the ordering [JAR06] were oriented:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

(20) Obligation:

Q DP problem:
The TRS P consists of the following rules:

C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(x)
C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(b_{c_1}(c_{b_1}(x)))

The TRS R consists of the following rules:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(21) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04,JAR06].


The following pairs can be oriented strictly and are deleted.


C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(x)
The remaining pairs can at least be oriented weakly.
Used ordering: Polynomial interpretation [POLO]:

POL(C_{B_1}(x1)) = x1   
POL(a_{a_1}(x1)) = 0   
POL(a_{b_1}(x1)) = x1   
POL(a_{c_1}(x1)) = x1   
POL(b_{a_1}(x1)) = 0   
POL(b_{b_1}(x1)) = x1   
POL(b_{c_1}(x1)) = 1 + x1   
POL(c_{a_1}(x1)) = x1   
POL(c_{b_1}(x1)) = 0   
POL(c_{c_1}(x1)) = x1   

The following usable rules [FROCOS05] with respect to the argument filtering of the ordering [JAR06] were oriented:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

(22) Obligation:

Q DP problem:
The TRS P consists of the following rules:

C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(b_{c_1}(c_{b_1}(x)))

The TRS R consists of the following rules:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(23) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04,JAR06].


The following pairs can be oriented strictly and are deleted.


C_{B_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → C_{B_1}(b_{c_1}(c_{b_1}(x)))
The remaining pairs can at least be oriented weakly.
Used ordering: Polynomial interpretation [POLO]:

POL(C_{B_1}(x1)) = x1   
POL(a_{a_1}(x1)) = 0   
POL(a_{b_1}(x1)) = 1   
POL(a_{c_1}(x1)) = x1   
POL(b_{a_1}(x1)) = 0   
POL(b_{b_1}(x1)) = x1   
POL(b_{c_1}(x1)) = x1   
POL(c_{a_1}(x1)) = x1   
POL(c_{b_1}(x1)) = 0   
POL(c_{c_1}(x1)) = x1   

The following usable rules [FROCOS05] with respect to the argument filtering of the ordering [JAR06] were oriented:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

(24) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

c_{b_1}(b_{c_1}(c_{a_1}(a_{b_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{b_1}(x))))
c_{b_1}(b_{c_1}(c_{a_1}(a_{a_1}(x)))) → c_{c_1}(c_{b_1}(b_{c_1}(c_{a_1}(x))))
c_{c_1}(c_{a_1}(a_{c_1}(x))) → c_{a_1}(a_{c_1}(x))
c_{c_1}(c_{a_1}(a_{b_1}(x))) → c_{a_1}(a_{b_1}(x))
c_{c_1}(c_{a_1}(a_{a_1}(x))) → c_{a_1}(a_{a_1}(x))
b_{c_1}(c_{a_1}(a_{c_1}(x))) → b_{a_1}(a_{c_1}(x))
b_{c_1}(c_{a_1}(a_{b_1}(x))) → b_{a_1}(a_{b_1}(x))
b_{c_1}(c_{a_1}(a_{a_1}(x))) → b_{a_1}(a_{a_1}(x))
c_{c_1}(c_{c_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
c_{c_1}(c_{b_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
c_{c_1}(c_{a_1}(x)) → c_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))
b_{c_1}(c_{c_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{c_1}(x))))
b_{c_1}(c_{b_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{b_1}(x))))
b_{c_1}(c_{a_1}(x)) → b_{a_1}(a_{a_1}(a_{b_1}(b_{a_1}(x))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(25) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(26) YES