The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(O(1), O(n^1)).

0 CpxTRS
↳1 CpxTrsToCdtProof (BOTH BOUNDS(ID, ID))
↳2 CdtProblem
↳3 CdtNarrowingProof (BOTH BOUNDS(ID, ID))
↳4 CdtProblem
↳5 CdtNarrowingProof (BOTH BOUNDS(ID, ID))
↳6 CdtProblem
↳7 CdtGraphRemoveDanglingProof (BOTH BOUNDS(ID, ID))
↳8 CdtProblem
↳9 CdtGraphSplitRhsProof (BOTH BOUNDS(ID, ID))
↳10 CdtProblem
↳11 CdtGraphRemoveTrailingProof (BOTH BOUNDS(ID, ID))
↳12 CdtProblem
↳13 CdtKnowledgeProof (⇔)
↳14 CdtProblem
↳15 CdtPolyRedPairProof (UPPER BOUND (ADD(O(n^1))))
↳16 CdtProblem
↳17 SIsEmptyProof (⇔)
↳18 BOUNDS(O(1), O(1))

(0) Obligation:

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

+(X, 0) → X
+(X, s(Y)) → s(+(X, Y))
double(X) → +(X, X)
f(0, s(0), X) → f(X, double(X), X)
g(X, Y) → X
g(X, Y) → Y

Rewrite Strategy: INNERMOST

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

Converted CpxTRS to CDT

(2) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), z0) → c3(F(z0, double(z0), z0), DOUBLE(z0))
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), z0) → c3(F(z0, double(z0), z0), DOUBLE(z0))
K tuples:none
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c3

(3) CdtNarrowingProof (BOTH BOUNDS(ID, ID) transformation)

Use narrowing to replace F(0, s(0), z0) → c3(F(z0, double(z0), z0), DOUBLE(z0)) by

F(0, s(0), z0) → c3(F(z0, +(z0, z0), z0), DOUBLE(z0))

(4) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), z0) → c3(F(z0, +(z0, z0), z0), DOUBLE(z0))
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), z0) → c3(F(z0, +(z0, z0), z0), DOUBLE(z0))
K tuples:none
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c3

(5) CdtNarrowingProof (BOTH BOUNDS(ID, ID) transformation)

Use narrowing to replace F(0, s(0), z0) → c3(F(z0, +(z0, z0), z0), DOUBLE(z0)) by

F(0, s(0), 0) → c3(F(0, 0, 0), DOUBLE(0))
F(0, s(0), s(z1)) → c3(F(s(z1), s(+(s(z1), z1)), s(z1)), DOUBLE(s(z1)))
F(0, s(0), x0) → c3(DOUBLE(x0))

(6) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), 0) → c3(F(0, 0, 0), DOUBLE(0))
F(0, s(0), s(z1)) → c3(F(s(z1), s(+(s(z1), z1)), s(z1)), DOUBLE(s(z1)))
F(0, s(0), x0) → c3(DOUBLE(x0))
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), 0) → c3(F(0, 0, 0), DOUBLE(0))
F(0, s(0), s(z1)) → c3(F(s(z1), s(+(s(z1), z1)), s(z1)), DOUBLE(s(z1)))
F(0, s(0), x0) → c3(DOUBLE(x0))
K tuples:none
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c3, c3

(7) CdtGraphRemoveDanglingProof (BOTH BOUNDS(ID, ID) transformation)

Removed 2 of 5 dangling nodes:

F(0, s(0), 0) → c3(F(0, 0, 0), DOUBLE(0))
F(0, s(0), x0) → c3(DOUBLE(x0))

(8) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c3(F(s(z1), s(+(s(z1), z1)), s(z1)), DOUBLE(s(z1)))
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c3(F(s(z1), s(+(s(z1), z1)), s(z1)), DOUBLE(s(z1)))
K tuples:none
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c3

(9) CdtGraphSplitRhsProof (BOTH BOUNDS(ID, ID) transformation)

Split RHS of tuples not part of any SCC

(10) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(F(s(z1), s(+(s(z1), z1)), s(z1)))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(F(s(z1), s(+(s(z1), z1)), s(z1)))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
K tuples:none
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c

(11) CdtGraphRemoveTrailingProof (BOTH BOUNDS(ID, ID) transformation)

Removed 1 trailing tuple parts

(12) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
K tuples:none
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c, c

(13) CdtKnowledgeProof (EQUIVALENT transformation)

The following tuples could be moved from S to K by knowledge propagation:

F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
DOUBLE(z0) → c2(+'(z0, z0))

(14) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
S tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
K tuples:

F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
DOUBLE(z0) → c2(+'(z0, z0))
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c, c

(15) CdtPolyRedPairProof (UPPER BOUND (ADD(O(n^1))) transformation)

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

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

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
The order we found is given by the following interpretation:
Polynomial interpretation :

POL(+'(x1, x2)) = [1] + [4]x2   
POL(0) = [5]   
POL(DOUBLE(x1)) = [2] + [4]x1   
POL(F(x1, x2, x3)) = [5] + [5]x1 + [5]x2 + [5]x3   
POL(c) = 0   
POL(c(x1)) = x1   
POL(c1(x1)) = x1   
POL(c2(x1)) = x1   
POL(s(x1)) = [1] + x1   

(16) Obligation:

Complexity Dependency Tuples Problem
Rules:

+(z0, 0) → z0
+(z0, s(z1)) → s(+(z0, z1))
double(z0) → +(z0, z0)
f(0, s(0), z0) → f(z0, double(z0), z0)
g(z0, z1) → z0
g(z0, z1) → z1
Tuples:

+'(z0, s(z1)) → c1(+'(z0, z1))
DOUBLE(z0) → c2(+'(z0, z0))
F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
S tuples:none
K tuples:

F(0, s(0), s(z1)) → c(DOUBLE(s(z1)))
F(0, s(0), s(z1)) → c
DOUBLE(z0) → c2(+'(z0, z0))
+'(z0, s(z1)) → c1(+'(z0, z1))
Defined Rule Symbols:

+, double, f, g

Defined Pair Symbols:

+', DOUBLE, F

Compound Symbols:

c1, c2, c, c

(17) SIsEmptyProof (EQUIVALENT transformation)

The set S is empty

(18) BOUNDS(O(1), O(1))