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:

prime(0) → false
prime(s(0)) → false
prime(s(s(x))) → prime1(s(s(x)), s(x))
prime1(x, 0) → false
prime1(x, s(0)) → true
prime1(x, s(s(y))) → and(not(divp(s(s(y)), x)), prime1(x, s(y)))
divp(x, y) → =(rem(x, y), 0)

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:

prime(0') → false
prime(s(0')) → false
prime(s(s(x))) → prime1(s(s(x)), s(x))
prime1(x, 0') → false
prime1(x, s(0')) → true
prime1(x, s(s(y))) → and(not(divp(s(s(y)), x)), prime1(x, s(y)))
divp(x, y) → ='(rem(x, y), 0')

S is empty.
Rewrite Strategy: INNERMOST

(3) SlicingProof (LOWER BOUND(ID) transformation)

Sliced the following arguments:
prime1/0
divp/0
divp/1
='/0
='/1
rem/0
rem/1

(4) Obligation:

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

prime(0') → false
prime(s(0')) → false
prime(s(s(x))) → prime1(s(x))
prime1(0') → false
prime1(s(0')) → true
prime1(s(s(y))) → and(not(divp), prime1(s(y)))
divp → ='

S is empty.
Rewrite Strategy: INNERMOST

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

Infered types.

(6) Obligation:

Innermost TRS:
Rules:
prime(0') → false
prime(s(0')) → false
prime(s(s(x))) → prime1(s(x))
prime1(0') → false
prime1(s(0')) → true
prime1(s(s(y))) → and(not(divp), prime1(s(y)))
divp → ='

Types:
prime :: 0':s → false:true:and
0' :: 0':s
false :: false:true:and
s :: 0':s → 0':s
prime1 :: 0':s → false:true:and
true :: false:true:and
and :: not → false:true:and → false:true:and
not :: =' → not
divp :: ='
=' :: ='
hole_false:true:and1_0 :: false:true:and
hole_0':s2_0 :: 0':s
hole_not3_0 :: not
hole_='4_0 :: ='
gen_false:true:and5_0 :: Nat → false:true:and
gen_0':s6_0 :: Nat → 0':s

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

Heuristically decided to analyse the following defined symbols:
prime1

(8) Obligation:

Innermost TRS:
Rules:
prime(0') → false
prime(s(0')) → false
prime(s(s(x))) → prime1(s(x))
prime1(0') → false
prime1(s(0')) → true
prime1(s(s(y))) → and(not(divp), prime1(s(y)))
divp → ='

Types:
prime :: 0':s → false:true:and
0' :: 0':s
false :: false:true:and
s :: 0':s → 0':s
prime1 :: 0':s → false:true:and
true :: false:true:and
and :: not → false:true:and → false:true:and
not :: =' → not
divp :: ='
=' :: ='
hole_false:true:and1_0 :: false:true:and
hole_0':s2_0 :: 0':s
hole_not3_0 :: not
hole_='4_0 :: ='
gen_false:true:and5_0 :: Nat → false:true:and
gen_0':s6_0 :: Nat → 0':s

Generator Equations:
gen_false:true:and5_0(0) ⇔ false
gen_false:true:and5_0(+(x, 1)) ⇔ and(not(='), gen_false:true:and5_0(x))
gen_0':s6_0(0) ⇔ 0'
gen_0':s6_0(+(x, 1)) ⇔ s(gen_0':s6_0(x))

The following defined symbols remain to be analysed:
prime1

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

Proved the following rewrite lemma:
prime1(gen_0':s6_0(+(1, n8_0))) → *7_0, rt ∈ Ω(n8₀)

Induction Base:
prime1(gen_0':s6_0(+(1, 0)))

Induction Step:
prime1(gen_0':s6_0(+(1, +(n8_0, 1)))) →_R^Ω(1)
and(not(divp), prime1(s(gen_0':s6_0(n8_0)))) →_R^Ω(1)
and(not(='), prime1(s(gen_0':s6_0(n8_0)))) →_IH
and(not(='), *7_0)

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

(10) Complex Obligation (BEST)

(11) Obligation:

Innermost TRS:
Rules:
prime(0') → false
prime(s(0')) → false
prime(s(s(x))) → prime1(s(x))
prime1(0') → false
prime1(s(0')) → true
prime1(s(s(y))) → and(not(divp), prime1(s(y)))
divp → ='

Types:
prime :: 0':s → false:true:and
0' :: 0':s
false :: false:true:and
s :: 0':s → 0':s
prime1 :: 0':s → false:true:and
true :: false:true:and
and :: not → false:true:and → false:true:and
not :: =' → not
divp :: ='
=' :: ='
hole_false:true:and1_0 :: false:true:and
hole_0':s2_0 :: 0':s
hole_not3_0 :: not
hole_='4_0 :: ='
gen_false:true:and5_0 :: Nat → false:true:and
gen_0':s6_0 :: Nat → 0':s

Lemmas:
prime1(gen_0':s6_0(+(1, n8_0))) → *7_0, rt ∈ Ω(n8₀)

Generator Equations:
gen_false:true:and5_0(0) ⇔ false
gen_false:true:and5_0(+(x, 1)) ⇔ and(not(='), gen_false:true:and5_0(x))
gen_0':s6_0(0) ⇔ 0'
gen_0':s6_0(+(x, 1)) ⇔ s(gen_0':s6_0(x))

No more defined symbols left to analyse.

(12) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
prime1(gen_0':s6_0(+(1, n8_0))) → *7_0, rt ∈ Ω(n8₀)

(13) BOUNDS(n^1, INF)

(14) Obligation:

Innermost TRS:
Rules:
prime(0') → false
prime(s(0')) → false
prime(s(s(x))) → prime1(s(x))
prime1(0') → false
prime1(s(0')) → true
prime1(s(s(y))) → and(not(divp), prime1(s(y)))
divp → ='

Types:
prime :: 0':s → false:true:and
0' :: 0':s
false :: false:true:and
s :: 0':s → 0':s
prime1 :: 0':s → false:true:and
true :: false:true:and
and :: not → false:true:and → false:true:and
not :: =' → not
divp :: ='
=' :: ='
hole_false:true:and1_0 :: false:true:and
hole_0':s2_0 :: 0':s
hole_not3_0 :: not
hole_='4_0 :: ='
gen_false:true:and5_0 :: Nat → false:true:and
gen_0':s6_0 :: Nat → 0':s

Lemmas:
prime1(gen_0':s6_0(+(1, n8_0))) → *7_0, rt ∈ Ω(n8₀)

Generator Equations:
gen_false:true:and5_0(0) ⇔ false
gen_false:true:and5_0(+(x, 1)) ⇔ and(not(='), gen_false:true:and5_0(x))
gen_0':s6_0(0) ⇔ 0'
gen_0':s6_0(+(x, 1)) ⇔ s(gen_0':s6_0(x))

No more defined symbols left to analyse.

(15) LowerBoundsProof (EQUIVALENT transformation)

The lowerbound Ω(n¹) was proven with the following lemma:
prime1(gen_0':s6_0(+(1, n8_0))) → *7_0, rt ∈ Ω(n8₀)

(16) BOUNDS(n^1, INF)