Termination w.r.t. Q of the following Term Rewriting System could not be shown:

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

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

Q is empty.


QTRS
  ↳ DependencyPairsProof
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

Q is empty.

Using Dependency Pairs [1,15] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

B(c(x1)) → A(x1)
B(c(x1)) → B(a(x1))
A(a(x1)) → B(x1)

The TRS R consists of the following rules:

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

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

↳ QTRS
  ↳ DependencyPairsProof
QDP
      ↳ Narrowing
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

B(c(x1)) → A(x1)
B(c(x1)) → B(a(x1))
A(a(x1)) → B(x1)

The TRS R consists of the following rules:

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
By narrowing [15] the rule B(c(x1)) → B(a(x1)) at position [0] we obtained the following new rules:

B(c(a(x0))) → B(b(x0))
B(c(x0)) → B(x0)



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
QDP
          ↳ QDPToSRSProof
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

B(c(a(x0))) → B(b(x0))
B(c(x1)) → A(x1)
B(c(x0)) → B(x0)
A(a(x1)) → B(x1)

The TRS R consists of the following rules:

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The finiteness of this DP problem is implied by strong termination of a SRS due to [12].


↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
QTRS
              ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))
B(c(a(x0))) → B(b(x0))
B(c(x1)) → A(x1)
B(c(x0)) → B(x0)
A(a(x1)) → B(x1)

Q is empty.

We have reversed the following QTRS:
The set of rules R is

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))
B(c(a(x0))) → B(b(x0))
B(c(x1)) → A(x1)
B(c(x0)) → B(x0)
A(a(x1)) → B(x1)

The set Q is empty.
We have obtained the following QTRS:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

The set Q is empty.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
QTRS
                  ↳ DependencyPairsProof
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.

Using Dependency Pairs [1,15] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

A1(a(x)) → B1(x)
A1(c(B(x))) → B1(B(x))
C(b(x)) → A1(b(c(c(c(x)))))
C(b(x)) → C(c(c(x)))
C(b(x)) → C(c(x))
C(b(x)) → C(x)
C(b(x)) → B1(c(c(c(x))))

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

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

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
QDP
                      ↳ DependencyGraphProof
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

A1(a(x)) → B1(x)
A1(c(B(x))) → B1(B(x))
C(b(x)) → A1(b(c(c(c(x)))))
C(b(x)) → C(c(c(x)))
C(b(x)) → C(c(x))
C(b(x)) → C(x)
C(b(x)) → B1(c(c(c(x))))

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 1 SCC with 4 less nodes.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
QDP
                          ↳ Narrowing
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(x)) → C(c(c(x)))
C(b(x)) → C(c(x))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
By narrowing [15] the rule C(b(x)) → C(c(x)) at position [0] we obtained the following new rules:

C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(B(x0))) → C(B(x0))
C(b(B(x0))) → C(A(x0))



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
                        ↳ QDP
                          ↳ Narrowing
QDP
                              ↳ DependencyGraphProof
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(B(x0))) → C(B(x0))
C(b(B(x0))) → C(A(x0))
C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(x)) → C(c(c(x)))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 1 SCC with 2 less nodes.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
                        ↳ QDP
                          ↳ Narrowing
                            ↳ QDP
                              ↳ DependencyGraphProof
QDP
                                  ↳ Narrowing
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(x)) → C(c(c(x)))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
By narrowing [15] the rule C(b(x)) → C(c(c(x))) at position [0] we obtained the following new rules:

C(b(b(x0))) → C(c(a(b(c(c(c(x0)))))))
C(b(B(x0))) → C(c(B(x0)))
C(b(B(x0))) → C(c(A(x0)))



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
                        ↳ QDP
                          ↳ Narrowing
                            ↳ QDP
                              ↳ DependencyGraphProof
                                ↳ QDP
                                  ↳ Narrowing
QDP
                                      ↳ DependencyGraphProof
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(b(x0))) → C(c(a(b(c(c(c(x0)))))))
C(b(B(x0))) → C(c(B(x0)))
C(b(B(x0))) → C(c(A(x0)))
C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 1 SCC with 1 less node.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
                        ↳ QDP
                          ↳ Narrowing
                            ↳ QDP
                              ↳ DependencyGraphProof
                                ↳ QDP
                                  ↳ Narrowing
                                    ↳ QDP
                                      ↳ DependencyGraphProof
QDP
                                          ↳ Narrowing
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(b(x0))) → C(c(a(b(c(c(c(x0)))))))
C(b(B(x0))) → C(c(B(x0)))
C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
By narrowing [15] the rule C(b(B(x0))) → C(c(B(x0))) at position [0] we obtained the following new rules:

C(b(B(x0))) → C(B(x0))
C(b(B(x0))) → C(A(x0))



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
                        ↳ QDP
                          ↳ Narrowing
                            ↳ QDP
                              ↳ DependencyGraphProof
                                ↳ QDP
                                  ↳ Narrowing
                                    ↳ QDP
                                      ↳ DependencyGraphProof
                                        ↳ QDP
                                          ↳ Narrowing
QDP
                                              ↳ DependencyGraphProof
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(b(x0))) → C(c(a(b(c(c(c(x0)))))))
C(b(B(x0))) → C(B(x0))
C(b(B(x0))) → C(A(x0))
C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 1 SCC with 2 less nodes.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                    ↳ QDP
                      ↳ DependencyGraphProof
                        ↳ QDP
                          ↳ Narrowing
                            ↳ QDP
                              ↳ DependencyGraphProof
                                ↳ QDP
                                  ↳ Narrowing
                                    ↳ QDP
                                      ↳ DependencyGraphProof
                                        ↳ QDP
                                          ↳ Narrowing
                                            ↳ QDP
                                              ↳ DependencyGraphProof
QDP
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

C(b(b(x0))) → C(c(a(b(c(c(c(x0)))))))
C(b(b(x0))) → C(a(b(c(c(c(x0))))))
C(b(x)) → C(x)

The TRS R consists of the following rules:

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We have reversed the following QTRS:
The set of rules R is

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

The set Q is empty.
We have obtained the following QTRS:

a(x) → x
a(a(x)) → b(x)
b(x) → x
b(c(x)) → c(c(c(b(a(x)))))
B(c(a(x))) → B(b(x))
B(c(x)) → A(x)
B(c(x)) → B(x)
A(a(x)) → B(x)

The set Q is empty.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                  ↳ QTRS Reverse
QTRS
                  ↳ QTRS Reverse
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

a(x) → x
a(a(x)) → b(x)
b(x) → x
b(c(x)) → c(c(c(b(a(x)))))
B(c(a(x))) → B(b(x))
B(c(x)) → A(x)
B(c(x)) → B(x)
A(a(x)) → B(x)

Q is empty.

We have reversed the following QTRS:
The set of rules R is

a(x) → x
a(a(x)) → b(x)
b(x) → x
c(b(x)) → a(b(c(c(c(x)))))
a(c(B(x))) → b(B(x))
c(B(x)) → A(x)
c(B(x)) → B(x)
a(A(x)) → B(x)

The set Q is empty.
We have obtained the following QTRS:

a(x) → x
a(a(x)) → b(x)
b(x) → x
b(c(x)) → c(c(c(b(a(x)))))
B(c(a(x))) → B(b(x))
B(c(x)) → A(x)
B(c(x)) → B(x)
A(a(x)) → B(x)

The set Q is empty.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ Narrowing
        ↳ QDP
          ↳ QDPToSRSProof
            ↳ QTRS
              ↳ QTRS Reverse
                ↳ QTRS
                  ↳ DependencyPairsProof
                  ↳ QTRS Reverse
                  ↳ QTRS Reverse
QTRS
  ↳ QTRS Reverse
  ↳ QTRS Reverse

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

a(x) → x
a(a(x)) → b(x)
b(x) → x
b(c(x)) → c(c(c(b(a(x)))))
B(c(a(x))) → B(b(x))
B(c(x)) → A(x)
B(c(x)) → B(x)
A(a(x)) → B(x)

Q is empty.

We have reversed the following QTRS:
The set of rules R is

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

The set Q is empty.
We have obtained the following QTRS:

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

The set Q is empty.

↳ QTRS
  ↳ DependencyPairsProof
  ↳ QTRS Reverse
QTRS
  ↳ QTRS Reverse

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

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

Q is empty.

We have reversed the following QTRS:
The set of rules R is

a(x1) → x1
a(a(x1)) → b(x1)
b(x1) → x1
b(c(x1)) → c(c(c(b(a(x1)))))

The set Q is empty.
We have obtained the following QTRS:

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

The set Q is empty.

↳ QTRS
  ↳ DependencyPairsProof
  ↳ QTRS Reverse
  ↳ QTRS Reverse
QTRS

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

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

Q is empty.