(0) Obligation:
Runtime Complexity TRS:
The TRS R consists of the following rules:
p(0) → 0
p(s(x)) → x
minus(x, 0) → x
minus(s(x), s(y)) → minus(x, y)
minus(x, s(y)) → p(minus(x, y))
div(0, s(y)) → 0
div(s(x), s(y)) → s(div(minus(s(x), s(y)), s(y)))
log(s(0), s(s(y))) → 0
log(s(s(x)), s(s(y))) → s(log(div(minus(x, y), s(s(y))), s(s(y))))
Rewrite Strategy: FULL
(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:
p(0') → 0'
p(s(x)) → x
minus(x, 0') → x
minus(s(x), s(y)) → minus(x, y)
minus(x, s(y)) → p(minus(x, y))
div(0', s(y)) → 0'
div(s(x), s(y)) → s(div(minus(s(x), s(y)), s(y)))
log(s(0'), s(s(y))) → 0'
log(s(s(x)), s(s(y))) → s(log(div(minus(x, y), s(s(y))), s(s(y))))
S is empty.
Rewrite Strategy: FULL
(3) TypeInferenceProof (BOTH BOUNDS(ID, ID) transformation)
Infered types.
(4) Obligation:
TRS:
Rules:
p(0') → 0'
p(s(x)) → x
minus(x, 0') → x
minus(s(x), s(y)) → minus(x, y)
minus(x, s(y)) → p(minus(x, y))
div(0', s(y)) → 0'
div(s(x), s(y)) → s(div(minus(s(x), s(y)), s(y)))
log(s(0'), s(s(y))) → 0'
log(s(s(x)), s(s(y))) → s(log(div(minus(x, y), s(s(y))), s(s(y))))
Types:
p :: 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
minus :: 0':s → 0':s → 0':s
div :: 0':s → 0':s → 0':s
log :: 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
gen_0':s2_0 :: Nat → 0':s
(5) OrderProof (LOWER BOUND(ID) transformation)
Heuristically decided to analyse the following defined symbols:
minus,
div,
logThey will be analysed ascendingly in the following order:
minus < div
minus < log
div < log
(6) Obligation:
TRS:
Rules:
p(
0') →
0'p(
s(
x)) →
xminus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
minus(
x,
s(
y)) →
p(
minus(
x,
y))
div(
0',
s(
y)) →
0'div(
s(
x),
s(
y)) →
s(
div(
minus(
s(
x),
s(
y)),
s(
y)))
log(
s(
0'),
s(
s(
y))) →
0'log(
s(
s(
x)),
s(
s(
y))) →
s(
log(
div(
minus(
x,
y),
s(
s(
y))),
s(
s(
y))))
Types:
p :: 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
minus :: 0':s → 0':s → 0':s
div :: 0':s → 0':s → 0':s
log :: 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
gen_0':s2_0 :: Nat → 0':s
Generator Equations:
gen_0':s2_0(0) ⇔ 0'
gen_0':s2_0(+(x, 1)) ⇔ s(gen_0':s2_0(x))
The following defined symbols remain to be analysed:
minus, div, log
They will be analysed ascendingly in the following order:
minus < div
minus < log
div < log
(7) RewriteLemmaProof (LOWER BOUND(ID) transformation)
Proved the following rewrite lemma:
minus(
gen_0':s2_0(
n4_0),
gen_0':s2_0(
n4_0)) →
gen_0':s2_0(
0), rt ∈ Ω(1 + n4
0)
Induction Base:
minus(gen_0':s2_0(0), gen_0':s2_0(0)) →RΩ(1)
gen_0':s2_0(0)
Induction Step:
minus(gen_0':s2_0(+(n4_0, 1)), gen_0':s2_0(+(n4_0, 1))) →RΩ(1)
minus(gen_0':s2_0(n4_0), gen_0':s2_0(n4_0)) →IH
gen_0':s2_0(0)
We have rt ∈ Ω(n1) and sz ∈ O(n). Thus, we have ircR ∈ Ω(n).
(8) Complex Obligation (BEST)
(9) Obligation:
TRS:
Rules:
p(
0') →
0'p(
s(
x)) →
xminus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
minus(
x,
s(
y)) →
p(
minus(
x,
y))
div(
0',
s(
y)) →
0'div(
s(
x),
s(
y)) →
s(
div(
minus(
s(
x),
s(
y)),
s(
y)))
log(
s(
0'),
s(
s(
y))) →
0'log(
s(
s(
x)),
s(
s(
y))) →
s(
log(
div(
minus(
x,
y),
s(
s(
y))),
s(
s(
y))))
Types:
p :: 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
minus :: 0':s → 0':s → 0':s
div :: 0':s → 0':s → 0':s
log :: 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
gen_0':s2_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s2_0(n4_0), gen_0':s2_0(n4_0)) → gen_0':s2_0(0), rt ∈ Ω(1 + n40)
Generator Equations:
gen_0':s2_0(0) ⇔ 0'
gen_0':s2_0(+(x, 1)) ⇔ s(gen_0':s2_0(x))
The following defined symbols remain to be analysed:
div, log
They will be analysed ascendingly in the following order:
div < log
(10) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)
Could not prove a rewrite lemma for the defined symbol div.
(11) Obligation:
TRS:
Rules:
p(
0') →
0'p(
s(
x)) →
xminus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
minus(
x,
s(
y)) →
p(
minus(
x,
y))
div(
0',
s(
y)) →
0'div(
s(
x),
s(
y)) →
s(
div(
minus(
s(
x),
s(
y)),
s(
y)))
log(
s(
0'),
s(
s(
y))) →
0'log(
s(
s(
x)),
s(
s(
y))) →
s(
log(
div(
minus(
x,
y),
s(
s(
y))),
s(
s(
y))))
Types:
p :: 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
minus :: 0':s → 0':s → 0':s
div :: 0':s → 0':s → 0':s
log :: 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
gen_0':s2_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s2_0(n4_0), gen_0':s2_0(n4_0)) → gen_0':s2_0(0), rt ∈ Ω(1 + n40)
Generator Equations:
gen_0':s2_0(0) ⇔ 0'
gen_0':s2_0(+(x, 1)) ⇔ s(gen_0':s2_0(x))
The following defined symbols remain to be analysed:
log
(12) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)
Could not prove a rewrite lemma for the defined symbol log.
(13) Obligation:
TRS:
Rules:
p(
0') →
0'p(
s(
x)) →
xminus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
minus(
x,
s(
y)) →
p(
minus(
x,
y))
div(
0',
s(
y)) →
0'div(
s(
x),
s(
y)) →
s(
div(
minus(
s(
x),
s(
y)),
s(
y)))
log(
s(
0'),
s(
s(
y))) →
0'log(
s(
s(
x)),
s(
s(
y))) →
s(
log(
div(
minus(
x,
y),
s(
s(
y))),
s(
s(
y))))
Types:
p :: 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
minus :: 0':s → 0':s → 0':s
div :: 0':s → 0':s → 0':s
log :: 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
gen_0':s2_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s2_0(n4_0), gen_0':s2_0(n4_0)) → gen_0':s2_0(0), rt ∈ Ω(1 + n40)
Generator Equations:
gen_0':s2_0(0) ⇔ 0'
gen_0':s2_0(+(x, 1)) ⇔ s(gen_0':s2_0(x))
No more defined symbols left to analyse.
(14) LowerBoundsProof (EQUIVALENT transformation)
The lowerbound Ω(n1) was proven with the following lemma:
minus(gen_0':s2_0(n4_0), gen_0':s2_0(n4_0)) → gen_0':s2_0(0), rt ∈ Ω(1 + n40)
(15) BOUNDS(n^1, INF)
(16) Obligation:
TRS:
Rules:
p(
0') →
0'p(
s(
x)) →
xminus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
minus(
x,
s(
y)) →
p(
minus(
x,
y))
div(
0',
s(
y)) →
0'div(
s(
x),
s(
y)) →
s(
div(
minus(
s(
x),
s(
y)),
s(
y)))
log(
s(
0'),
s(
s(
y))) →
0'log(
s(
s(
x)),
s(
s(
y))) →
s(
log(
div(
minus(
x,
y),
s(
s(
y))),
s(
s(
y))))
Types:
p :: 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
minus :: 0':s → 0':s → 0':s
div :: 0':s → 0':s → 0':s
log :: 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
gen_0':s2_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s2_0(n4_0), gen_0':s2_0(n4_0)) → gen_0':s2_0(0), rt ∈ Ω(1 + n40)
Generator Equations:
gen_0':s2_0(0) ⇔ 0'
gen_0':s2_0(+(x, 1)) ⇔ s(gen_0':s2_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_0':s2_0(n4_0), gen_0':s2_0(n4_0)) → gen_0':s2_0(0), rt ∈ Ω(1 + n40)
(18) BOUNDS(n^1, INF)