### (0) Obligation:

Runtime Complexity TRS:
The TRS R consists of the following rules:

average(s(x), y) → average(x, s(y))
average(x, s(s(s(y)))) → s(average(s(x), y))
average(0, 0) → 0
average(0, s(0)) → 0
average(0, s(s(0))) → s(0)

Rewrite Strategy: INNERMOST

### (1) CpxTrsToCdtProof (BOTH BOUNDS(ID, ID) transformation)

Converted Cpx (relative) TRS to CDT

### (2) Obligation:

Complexity Dependency Tuples Problem
Rules:

average(s(z0), z1) → average(z0, s(z1))
average(z0, s(s(s(z1)))) → s(average(s(z0), z1))
average(0, 0) → 0
average(0, s(0)) → 0
average(0, s(s(0))) → s(0)
Tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
AVERAGE(0, 0) → c2
AVERAGE(0, s(0)) → c3
AVERAGE(0, s(s(0))) → c4
S tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
AVERAGE(0, 0) → c2
AVERAGE(0, s(0)) → c3
AVERAGE(0, s(s(0))) → c4
K tuples:none
Defined Rule Symbols:

average

Defined Pair Symbols:

AVERAGE

Compound Symbols:

c, c1, c2, c3, c4

### (3) CdtLeafRemovalProof (BOTH BOUNDS(ID, ID) transformation)

Removed 3 trailing nodes:

AVERAGE(0, 0) → c2
AVERAGE(0, s(0)) → c3
AVERAGE(0, s(s(0))) → c4

### (4) Obligation:

Complexity Dependency Tuples Problem
Rules:

average(s(z0), z1) → average(z0, s(z1))
average(z0, s(s(s(z1)))) → s(average(s(z0), z1))
average(0, 0) → 0
average(0, s(0)) → 0
average(0, s(s(0))) → s(0)
Tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
S tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
K tuples:none
Defined Rule Symbols:

average

Defined Pair Symbols:

AVERAGE

Compound Symbols:

c, c1

### (5) CdtUsableRulesProof (EQUIVALENT transformation)

The following rules are not usable and were removed:

average(s(z0), z1) → average(z0, s(z1))
average(z0, s(s(s(z1)))) → s(average(s(z0), z1))
average(0, 0) → 0
average(0, s(0)) → 0
average(0, s(s(0))) → s(0)

### (6) Obligation:

Complexity Dependency Tuples Problem
Rules:none
Tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
S tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
K tuples:none
Defined Rule Symbols:none

Defined Pair Symbols:

AVERAGE

Compound Symbols:

c, c1

### (7) CdtRuleRemovalProof (UPPER BOUND (ADD(O(n^1))) transformation)

Found a reduction pair which oriented the following tuples strictly. Hence they can be removed from S.

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
We considered the (Usable) Rules:none
And the Tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
The order we found is given by the following interpretation:
Polynomial interpretation :

POL(AVERAGE(x1, x2)) = [4]x1 + [2]x2
POL(c(x1)) = x1
POL(c1(x1)) = x1
POL(s(x1)) = [2] + x1

### (8) Obligation:

Complexity Dependency Tuples Problem
Rules:none
Tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
S tuples:none
K tuples:

AVERAGE(s(z0), z1) → c(AVERAGE(z0, s(z1)))
AVERAGE(z0, s(s(s(z1)))) → c1(AVERAGE(s(z0), z1))
Defined Rule Symbols:none

Defined Pair Symbols:

AVERAGE

Compound Symbols:

c, c1

### (9) SIsEmptyProof (BOTH BOUNDS(ID, ID) transformation)

The set S is empty