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:

le(0, y, z) → greater(y, z)
le(s(x), 0, z) → false
le(s(x), s(y), 0) → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0) → first
greater(0, s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0) → 0
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0, 0)
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

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:

le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

S is empty.
Rewrite Strategy: INNERMOST

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

Infered types.

(4) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

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

Heuristically decided to analyse the following defined symbols:
le, greater, double, if

They will be analysed ascendingly in the following order:
greater < le
le < if

(6) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

The following defined symbols remain to be analysed:
greater, le, double, if

They will be analysed ascendingly in the following order:
greater < le
le < if

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

Proved the following rewrite lemma:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

Induction Base:
greater(gen_0':s4_0(0), gen_0':s4_0(0)) →_R^Ω(1)
first

Induction Step:
greater(gen_0':s4_0(+(n6_0, 1)), gen_0':s4_0(+(n6_0, 1))) →_R^Ω(1)
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) →_IH
first

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:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

The following defined symbols remain to be analysed:
le, double, if

They will be analysed ascendingly in the following order:
le < if

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

Proved the following rewrite lemma:
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) → false, rt ∈ Ω(1 + n307₀)

Induction Base:
le(gen_0':s4_0(+(1, 0)), gen_0':s4_0(0), gen_0':s4_0(0)) →_R^Ω(1)
false

Induction Step:
le(gen_0':s4_0(+(1, +(n307_0, 1))), gen_0':s4_0(+(n307_0, 1)), gen_0':s4_0(+(n307_0, 1))) →_R^Ω(1)
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) →_IH
false

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:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) → false, rt ∈ Ω(1 + n307₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

The following defined symbols remain to be analysed:
double, if

(13) RewriteLemmaProof (LOWER BOUND(ID) transformation)

Proved the following rewrite lemma:
double(gen_0':s4_0(n1184_0)) → gen_0':s4_0(*(2, n1184_0)), rt ∈ Ω(1 + n1184₀)

Induction Base:
double(gen_0':s4_0(0)) →_R^Ω(1)
0'

Induction Step:
double(gen_0':s4_0(+(n1184_0, 1))) →_R^Ω(1)
s(s(double(gen_0':s4_0(n1184_0)))) →_IH
s(s(gen_0':s4_0(*(2, c1185_0))))

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

(14) Complex Obligation (BEST)

(15) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) → false, rt ∈ Ω(1 + n307₀)
double(gen_0':s4_0(n1184_0)) → gen_0':s4_0(*(2, n1184_0)), rt ∈ Ω(1 + n1184₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

The following defined symbols remain to be analysed:
if

(16) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

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

(17) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) → false, rt ∈ Ω(1 + n307₀)
double(gen_0':s4_0(n1184_0)) → gen_0':s4_0(*(2, n1184_0)), rt ∈ Ω(1 + n1184₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

No more defined symbols left to analyse.

(18) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

(19) BOUNDS(n^1, INF)

(20) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) → false, rt ∈ Ω(1 + n307₀)
double(gen_0':s4_0(n1184_0)) → gen_0':s4_0(*(2, n1184_0)), rt ∈ Ω(1 + n1184₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

No more defined symbols left to analyse.

(21) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

(22) BOUNDS(n^1, INF)

(23) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)
le(gen_0':s4_0(+(1, n307_0)), gen_0':s4_0(n307_0), gen_0':s4_0(n307_0)) → false, rt ∈ Ω(1 + n307₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

No more defined symbols left to analyse.

(24) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

(25) BOUNDS(n^1, INF)

(26) Obligation:

Innermost TRS:
Rules:
le(0', y, z) → greater(y, z)
le(s(x), 0', z) → false
le(s(x), s(y), 0') → false
le(s(x), s(y), s(z)) → le(x, y, z)
greater(x, 0') → first
greater(0', s(y)) → second
greater(s(x), s(y)) → greater(x, y)
double(0') → 0'
double(s(x)) → s(s(double(x)))
triple(x) → if(le(x, x, double(x)), x, 0', 0')
if(false, x, y, z) → true
if(first, x, y, z) → if(le(s(x), y, s(z)), s(x), y, s(z))
if(second, x, y, z) → if(le(s(x), s(y), z), s(x), s(y), z)

Types:
le :: 0':s → 0':s → 0':s → false:first:second
0' :: 0':s
greater :: 0':s → 0':s → false:first:second
s :: 0':s → 0':s
false :: false:first:second
first :: false:first:second
second :: false:first:second
double :: 0':s → 0':s
triple :: 0':s → true
if :: false:first:second → 0':s → 0':s → 0':s → true
true :: true
hole_false:first:second1_0 :: false:first:second
hole_0':s2_0 :: 0':s
hole_true3_0 :: true
gen_0':s4_0 :: Nat → 0':s

Lemmas:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

Generator Equations:
gen_0':s4_0(0) ⇔ 0'
gen_0':s4_0(+(x, 1)) ⇔ s(gen_0':s4_0(x))

No more defined symbols left to analyse.

(27) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
greater(gen_0':s4_0(n6_0), gen_0':s4_0(n6_0)) → first, rt ∈ Ω(1 + n6₀)

(28) BOUNDS(n^1, INF)