The Runtime Complexity (full) 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:

pred(s(x)) → x
minus(x, 0) → x
minus(x, s(y)) → pred(minus(x, y))
quot(0, s(y)) → 0
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0)) → 0
log(s(s(x))) → s(log(s(quot(x, s(s(0))))))

Rewrite Strategy: FULL

(1) DecreasingLoopProof (EQUIVALENT transformation)

The following loop(s) give(s) rise to the lower bound Ω(n¹):
The rewrite sequence
minus(x, s(y)) →⁺ pred(minus(x, y))
gives rise to a decreasing loop by considering the right hand sides subterm at position [0].
The pumping substitution is [y / s(y)].
The result substitution is [ ].

(2) BOUNDS(n^1, INF)

(3) RenamingProof (EQUIVALENT transformation)

Renamed function symbols to avoid clashes with predefined symbol.

(4) Obligation:

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

pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

S is empty.
Rewrite Strategy: FULL

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

Infered types.

(6) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

(7) OrderProof (LOWER BOUND(ID) transformation)

Heuristically decided to analyse the following defined symbols:
minus, quot, log

They will be analysed ascendingly in the following order:
minus < quot
quot < log

(8) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

Generator Equations:
gen_s:0'2_0(0) ⇔ 0'
gen_s:0'2_0(+(x, 1)) ⇔ s(gen_s:0'2_0(x))

The following defined symbols remain to be analysed:
minus, quot, log

They will be analysed ascendingly in the following order:
minus < quot
quot < log

(9) RewriteLemmaProof (LOWER BOUND(ID) transformation)

Proved the following rewrite lemma:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)

Induction Base:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, 0)))

Induction Step:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, +(n4_0, 1)))) →_R^Ω(1)
pred(minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0)))) →_IH
pred(*3_0)

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

(10) Complex Obligation (BEST)

(11) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

Lemmas:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)

Generator Equations:
gen_s:0'2_0(0) ⇔ 0'
gen_s:0'2_0(+(x, 1)) ⇔ s(gen_s:0'2_0(x))

The following defined symbols remain to be analysed:
quot, log

They will be analysed ascendingly in the following order:
quot < log

(12) RewriteLemmaProof (LOWER BOUND(ID) transformation)

Proved the following rewrite lemma:
quot(gen_s:0'2_0(n1993_0), gen_s:0'2_0(1)) → gen_s:0'2_0(n1993_0), rt ∈ Ω(1 + n1993₀)

Induction Base:
quot(gen_s:0'2_0(0), gen_s:0'2_0(1)) →_R^Ω(1)
0'

Induction Step:
quot(gen_s:0'2_0(+(n1993_0, 1)), gen_s:0'2_0(1)) →_R^Ω(1)
s(quot(minus(gen_s:0'2_0(n1993_0), gen_s:0'2_0(0)), s(gen_s:0'2_0(0)))) →_R^Ω(1)
s(quot(gen_s:0'2_0(n1993_0), s(gen_s:0'2_0(0)))) →_IH
s(gen_s:0'2_0(c1994_0))

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

(13) Complex Obligation (BEST)

(14) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

Lemmas:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)
quot(gen_s:0'2_0(n1993_0), gen_s:0'2_0(1)) → gen_s:0'2_0(n1993_0), rt ∈ Ω(1 + n1993₀)

Generator Equations:
gen_s:0'2_0(0) ⇔ 0'
gen_s:0'2_0(+(x, 1)) ⇔ s(gen_s:0'2_0(x))

The following defined symbols remain to be analysed:
log

(15) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

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

(16) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

Lemmas:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)
quot(gen_s:0'2_0(n1993_0), gen_s:0'2_0(1)) → gen_s:0'2_0(n1993_0), rt ∈ Ω(1 + n1993₀)

Generator Equations:
gen_s:0'2_0(0) ⇔ 0'
gen_s:0'2_0(+(x, 1)) ⇔ s(gen_s:0'2_0(x))

No more defined symbols left to analyse.

(17) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)

(18) BOUNDS(n^1, INF)

(19) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

Lemmas:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)
quot(gen_s:0'2_0(n1993_0), gen_s:0'2_0(1)) → gen_s:0'2_0(n1993_0), rt ∈ Ω(1 + n1993₀)

Generator Equations:
gen_s:0'2_0(0) ⇔ 0'
gen_s:0'2_0(+(x, 1)) ⇔ s(gen_s:0'2_0(x))

No more defined symbols left to analyse.

(20) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)

(21) BOUNDS(n^1, INF)

(22) Obligation:

TRS:
Rules:
pred(s(x)) → x
minus(x, 0') → x
minus(x, s(y)) → pred(minus(x, y))
quot(0', s(y)) → 0'
quot(s(x), s(y)) → s(quot(minus(x, y), s(y)))
log(s(0')) → 0'
log(s(s(x))) → s(log(s(quot(x, s(s(0'))))))

Types:
pred :: s:0' → s:0'
s :: s:0' → s:0'
minus :: s:0' → s:0' → s:0'
0' :: s:0'
quot :: s:0' → s:0' → s:0'
log :: s:0' → s:0'
hole_s:0'1_0 :: s:0'
gen_s:0'2_0 :: Nat → s:0'

Lemmas:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)

Generator Equations:
gen_s:0'2_0(0) ⇔ 0'
gen_s:0'2_0(+(x, 1)) ⇔ s(gen_s:0'2_0(x))

No more defined symbols left to analyse.

(23) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
minus(gen_s:0'2_0(a), gen_s:0'2_0(+(1, n4_0))) → *3_0, rt ∈ Ω(n4₀)

(24) BOUNDS(n^1, INF)