Termination w.r.t. Q of the following Term Rewriting System could be proven:

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

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.


↳ QTRS
  ↳ DependencyPairsProof

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

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.

Using Dependency Pairs [1,13] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

DOUBLE1(s1(x)) -> DOUBLE1(x)
-12(s1(x), s1(y)) -> -12(x, y)
HALF1(s1(s1(x))) -> HALF1(x)

The TRS R consists of the following rules:

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

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

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof

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

DOUBLE1(s1(x)) -> DOUBLE1(x)
-12(s1(x), s1(y)) -> -12(x, y)
HALF1(s1(s1(x))) -> HALF1(x)

The TRS R consists of the following rules:

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 3 SCCs.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
            ↳ QDPOrderProof
          ↳ QDP
          ↳ QDP

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

-12(s1(x), s1(y)) -> -12(x, y)

The TRS R consists of the following rules:

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].


The following pairs can be oriented strictly and are deleted.


-12(s1(x), s1(y)) -> -12(x, y)
The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial Order [17,21] with Interpretation:

POL( s1(x1) ) = x1 + 3


POL( -12(x1, x2) ) = 3x2 + 3



The following usable rules [14] were oriented: none



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
            ↳ QDPOrderProof
              ↳ QDP
                ↳ PisEmptyProof
          ↳ QDP
          ↳ QDP

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

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The TRS P is empty. Hence, there is no (P,Q,R) chain.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof
          ↳ QDP

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

HALF1(s1(s1(x))) -> HALF1(x)

The TRS R consists of the following rules:

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].


The following pairs can be oriented strictly and are deleted.


HALF1(s1(s1(x))) -> HALF1(x)
The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial Order [17,21] with Interpretation:

POL( HALF1(x1) ) = max{0, 3x1 - 1}


POL( s1(x1) ) = 2x1 + 3



The following usable rules [14] were oriented: none



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof
              ↳ QDP
                ↳ PisEmptyProof
          ↳ QDP

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

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The TRS P is empty. Hence, there is no (P,Q,R) chain.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof

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

DOUBLE1(s1(x)) -> DOUBLE1(x)

The TRS R consists of the following rules:

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].


The following pairs can be oriented strictly and are deleted.


DOUBLE1(s1(x)) -> DOUBLE1(x)
The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial Order [17,21] with Interpretation:

POL( s1(x1) ) = 3x1 + 3


POL( DOUBLE1(x1) ) = 2x1 + 3



The following usable rules [14] were oriented: none



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof
              ↳ QDP
                ↳ PisEmptyProof

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

double1(0) -> 0
double1(s1(x)) -> s1(s1(double1(x)))
half1(0) -> 0
half1(s1(0)) -> 0
half1(s1(s1(x))) -> s1(half1(x))
-2(x, 0) -> x
-2(s1(x), s1(y)) -> -2(x, y)
if3(0, y, z) -> y
if3(s1(x), y, z) -> z
half1(double1(x)) -> x

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The TRS P is empty. Hence, there is no (P,Q,R) chain.