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

(0) Obligation:

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

-(x, 0) → x
-(s(x), s(y)) → -(x, y)
<=(0, y) → true
<=(s(x), 0) → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0) → false
perfectp(s(x)) → f(x, s(0), s(x), s(x))
f(0, y, 0, u) → true
f(0, y, s(z), u) → false
f(s(x), 0, z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Rewrite Strategy: INNERMOST

(1) RenamingProof (EQUIVALENT transformation)

Renamed function symbols to avoid clashes with predefined symbol.

(2) Obligation:

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

-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

S is empty.
Rewrite Strategy: INNERMOST

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

Infered types.

(4) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

(5) OrderProof (LOWER BOUND(ID) transformation)

Heuristically decided to analyse the following defined symbols:
-, <=, f

They will be analysed ascendingly in the following order:
- < f
<= < f

(6) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))

The following defined symbols remain to be analysed:
-, <=, f

They will be analysed ascendingly in the following order:
- < f
<= < f

(7) RewriteLemmaProof (LOWER BOUND(ID) transformation)

Proved the following rewrite lemma:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)

Induction Base:
-(gen_0':s3_0(0), gen_0':s3_0(0)) →_R^Ω(1)
gen_0':s3_0(0)

Induction Step:
-(gen_0':s3_0(+(n5_0, 1)), gen_0':s3_0(+(n5_0, 1))) →_R^Ω(1)
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) →_IH
gen_0':s3_0(0)

We have rt ∈ Ω(n¹) and sz ∈ O(n). Thus, we have irc_R ∈ Ω(n).

(8) Complex Obligation (BEST)

(9) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

Lemmas:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)

Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))

The following defined symbols remain to be analysed:
<=, f

They will be analysed ascendingly in the following order:
<= < f

(10) RewriteLemmaProof (LOWER BOUND(ID) transformation)

Proved the following rewrite lemma:
<=(gen_0':s3_0(n301_0), gen_0':s3_0(n301_0)) → true, rt ∈ Ω(1 + n301₀)

Induction Base:
<=(gen_0':s3_0(0), gen_0':s3_0(0)) →_R^Ω(1)
true

Induction Step:
<=(gen_0':s3_0(+(n301_0, 1)), gen_0':s3_0(+(n301_0, 1))) →_R^Ω(1)
<=(gen_0':s3_0(n301_0), gen_0':s3_0(n301_0)) →_IH
true

We have rt ∈ Ω(n¹) and sz ∈ O(n). Thus, we have irc_R ∈ Ω(n).

(11) Complex Obligation (BEST)

(12) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

Lemmas:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)
<=(gen_0':s3_0(n301_0), gen_0':s3_0(n301_0)) → true, rt ∈ Ω(1 + n301₀)

Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))

The following defined symbols remain to be analysed:
f

(13) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol f.

(14) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

Lemmas:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)
<=(gen_0':s3_0(n301_0), gen_0':s3_0(n301_0)) → true, rt ∈ Ω(1 + n301₀)

Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))

No more defined symbols left to analyse.

(15) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)

(16) BOUNDS(n^1, INF)

(17) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

Lemmas:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)
<=(gen_0':s3_0(n301_0), gen_0':s3_0(n301_0)) → true, rt ∈ Ω(1 + n301₀)

Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))

No more defined symbols left to analyse.

(18) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)

(19) BOUNDS(n^1, INF)

(20) Obligation:

Innermost TRS:
Rules:
-(x, 0') → x
-(s(x), s(y)) → -(x, y)
<=(0', y) → true
<=(s(x), 0') → false
<=(s(x), s(y)) → <=(x, y)
if(true, x, y) → x
if(false, x, y) → y
perfectp(0') → false
perfectp(s(x)) → f(x, s(0'), s(x), s(x))
f(0', y, 0', u) → true
f(0', y, s(z), u) → false
f(s(x), 0', z, u) → f(x, u, -(z, s(x)), u)
f(s(x), s(y), z, u) → if(<=(x, y), f(s(x), -(y, x), z, u), f(x, u, z, u))

Types:
- :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
<= :: 0':s → 0':s → true:false
true :: true:false
false :: true:false
if :: true:false → true:false → true:false → true:false
perfectp :: 0':s → true:false
f :: 0':s → 0':s → 0':s → 0':s → true:false
hole_0':s1_0 :: 0':s
hole_true:false2_0 :: true:false
gen_0':s3_0 :: Nat → 0':s

Lemmas:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)

Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))

No more defined symbols left to analyse.

(21) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
-(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n5₀)

(22) BOUNDS(n^1, INF)