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:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

Q is empty.


↳ QTRS
  ↳ DependencyPairsProof

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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:

SUM1(++2(xs, :2(x, :2(y, ys)))) -> ++12(xs, sum1(:2(x, :2(y, ys))))
AVG1(xs) -> HD1(sum1(xs))
QUOT2(s1(x), s1(y)) -> -12(x, y)
LENGTH1(:2(x, xs)) -> LENGTH1(xs)
-12(s1(x), s1(y)) -> -12(x, y)
+12(s1(x), y) -> +12(x, y)
AVG1(xs) -> QUOT2(hd1(sum1(xs)), length1(xs))
AVG1(xs) -> SUM1(xs)
++12(:2(x, xs), ys) -> ++12(xs, ys)
AVG1(xs) -> LENGTH1(xs)
SUM1(:2(x, :2(y, xs))) -> +12(x, y)
SUM1(:2(x, :2(y, xs))) -> SUM1(:2(+2(x, y), xs))
QUOT2(s1(x), s1(y)) -> QUOT2(-2(x, y), s1(y))
SUM1(++2(xs, :2(x, :2(y, ys)))) -> SUM1(:2(x, :2(y, ys)))
SUM1(++2(xs, :2(x, :2(y, ys)))) -> SUM1(++2(xs, sum1(:2(x, :2(y, ys)))))

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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:

SUM1(++2(xs, :2(x, :2(y, ys)))) -> ++12(xs, sum1(:2(x, :2(y, ys))))
AVG1(xs) -> HD1(sum1(xs))
QUOT2(s1(x), s1(y)) -> -12(x, y)
LENGTH1(:2(x, xs)) -> LENGTH1(xs)
-12(s1(x), s1(y)) -> -12(x, y)
+12(s1(x), y) -> +12(x, y)
AVG1(xs) -> QUOT2(hd1(sum1(xs)), length1(xs))
AVG1(xs) -> SUM1(xs)
++12(:2(x, xs), ys) -> ++12(xs, ys)
AVG1(xs) -> LENGTH1(xs)
SUM1(:2(x, :2(y, xs))) -> +12(x, y)
SUM1(:2(x, :2(y, xs))) -> SUM1(:2(+2(x, y), xs))
QUOT2(s1(x), s1(y)) -> QUOT2(-2(x, y), s1(y))
SUM1(++2(xs, :2(x, :2(y, ys)))) -> SUM1(:2(x, :2(y, ys)))
SUM1(++2(xs, :2(x, :2(y, ys)))) -> SUM1(++2(xs, sum1(:2(x, :2(y, ys)))))

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 7 SCCs with 8 less nodes.

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

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

LENGTH1(:2(x, xs)) -> LENGTH1(xs)

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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 strictly oriented and are deleted.


LENGTH1(:2(x, xs)) -> LENGTH1(xs)
The remaining pairs can at least by weakly be oriented.
none
Used ordering: Combined order from the following AFS and order.
LENGTH1(x1)  =  LENGTH1(x1)
:2(x1, x2)  =  :2(x1, x2)

Lexicographic Path Order [19].
Precedence:
:2 > LENGTH1

The following usable rules [14] were oriented: none



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

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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
          ↳ QDP
          ↳ QDP
          ↳ 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:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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 strictly oriented and are deleted.


-12(s1(x), s1(y)) -> -12(x, y)
The remaining pairs can at least by weakly be oriented.
none
Used ordering: Combined order from the following AFS and order.
-12(x1, x2)  =  x2
s1(x1)  =  s1(x1)

Lexicographic Path Order [19].
Precedence:
trivial

The following usable rules [14] were oriented: none



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

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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
          ↳ QDP
          ↳ QDP
          ↳ QDP
          ↳ QDP

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

QUOT2(s1(x), s1(y)) -> QUOT2(-2(x, y), s1(y))

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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 strictly oriented and are deleted.


QUOT2(s1(x), s1(y)) -> QUOT2(-2(x, y), s1(y))
The remaining pairs can at least by weakly be oriented.
none
Used ordering: Combined order from the following AFS and order.
QUOT2(x1, x2)  =  x1
s1(x1)  =  s1(x1)
-2(x1, x2)  =  x1
0  =  0

Lexicographic Path Order [19].
Precedence:
trivial

The following usable rules [14] were oriented:

-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)



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

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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
          ↳ QDP
            ↳ QDPOrderProof
          ↳ QDP
          ↳ QDP
          ↳ QDP

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

++12(:2(x, xs), ys) -> ++12(xs, ys)

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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 strictly oriented and are deleted.


++12(:2(x, xs), ys) -> ++12(xs, ys)
The remaining pairs can at least by weakly be oriented.
none
Used ordering: Combined order from the following AFS and order.
++12(x1, x2)  =  ++11(x1)
:2(x1, x2)  =  :1(x2)

Lexicographic Path Order [19].
Precedence:
:1 > ++^11

The following usable rules [14] were oriented: none



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

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof
          ↳ QDP
          ↳ QDP

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

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

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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 strictly oriented and are deleted.


+12(s1(x), y) -> +12(x, y)
The remaining pairs can at least by weakly be oriented.
none
Used ordering: Combined order from the following AFS and order.
+12(x1, x2)  =  +11(x1)
s1(x1)  =  s1(x1)

Lexicographic Path Order [19].
Precedence:
s1 > +^11

The following usable rules [14] were oriented: none



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

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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
          ↳ QDP
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof
          ↳ QDP

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

SUM1(:2(x, :2(y, xs))) -> SUM1(:2(+2(x, y), xs))

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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 strictly oriented and are deleted.


SUM1(:2(x, :2(y, xs))) -> SUM1(:2(+2(x, y), xs))
The remaining pairs can at least by weakly be oriented.
none
Used ordering: Combined order from the following AFS and order.
SUM1(x1)  =  SUM1(x1)
:2(x1, x2)  =  :2(x1, x2)
+2(x1, x2)  =  x2
0  =  0
s1(x1)  =  s

Lexicographic Path Order [19].
Precedence:
SUM1 > :2 > s
0 > s

The following usable rules [14] were oriented:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))



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

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

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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
          ↳ QDP
          ↳ QDP
          ↳ QDP
          ↳ QDP

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

SUM1(++2(xs, :2(x, :2(y, ys)))) -> SUM1(++2(xs, sum1(:2(x, :2(y, ys)))))

The TRS R consists of the following rules:

+2(0, y) -> y
+2(s1(x), y) -> s1(+2(x, y))
++2(nil, ys) -> ys
++2(:2(x, xs), ys) -> :2(x, ++2(xs, ys))
sum1(:2(x, nil)) -> :2(x, nil)
sum1(:2(x, :2(y, xs))) -> sum1(:2(+2(x, y), xs))
sum1(++2(xs, :2(x, :2(y, ys)))) -> sum1(++2(xs, sum1(:2(x, :2(y, ys)))))
-2(x, 0) -> x
-2(0, s1(y)) -> 0
-2(s1(x), s1(y)) -> -2(x, y)
quot2(0, s1(y)) -> 0
quot2(s1(x), s1(y)) -> s1(quot2(-2(x, y), s1(y)))
length1(nil) -> 0
length1(:2(x, xs)) -> s1(length1(xs))
hd1(:2(x, xs)) -> x
avg1(xs) -> quot2(hd1(sum1(xs)), length1(xs))

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