(0) Obligation:
Runtime Complexity TRS:
The TRS R consists of the following rules:
minus(x, x) → 0
minus(0, x) → 0
minus(x, 0) → x
minus(s(x), s(y)) → minus(x, y)
le(0, y) → true
le(s(x), 0) → false
le(s(x), s(y)) → le(x, y)
quot(x, y) → if_quot(minus(x, y), y, le(y, 0), le(y, x))
if_quot(x, y, true, z) → divByZeroError
if_quot(x, y, false, true) → s(quot(x, y))
if_quot(x, y, false, false) → 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(s(x), s(y)) →+ minus(x, y)
gives rise to a decreasing loop by considering the right hand sides subterm at position [].
The pumping substitution is [x / s(x), 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:
minus(x, x) → 0'
minus(0', x) → 0'
minus(x, 0') → x
minus(s(x), s(y)) → minus(x, y)
le(0', y) → true
le(s(x), 0') → false
le(s(x), s(y)) → le(x, y)
quot(x, y) → if_quot(minus(x, y), y, le(y, 0'), le(y, x))
if_quot(x, y, true, z) → divByZeroError
if_quot(x, y, false, true) → s(quot(x, y))
if_quot(x, y, false, false) → 0'
S is empty.
Rewrite Strategy: FULL
(5) TypeInferenceProof (BOTH BOUNDS(ID, ID) transformation)
Infered types.
(6) Obligation:
TRS:
Rules:
minus(x, x) → 0'
minus(0', x) → 0'
minus(x, 0') → x
minus(s(x), s(y)) → minus(x, y)
le(0', y) → true
le(s(x), 0') → false
le(s(x), s(y)) → le(x, y)
quot(x, y) → if_quot(minus(x, y), y, le(y, 0'), le(y, x))
if_quot(x, y, true, z) → divByZeroError
if_quot(x, y, false, true) → s(quot(x, y))
if_quot(x, y, false, false) → 0'
Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
(7) OrderProof (LOWER BOUND(ID) transformation)
Heuristically decided to analyse the following defined symbols:
minus,
le,
quotThey will be analysed ascendingly in the following order:
minus < quot
le < quot
(8) Obligation:
TRS:
Rules:
minus(
x,
x) →
0'minus(
0',
x) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
le(
0',
y) →
truele(
s(
x),
0') →
falsele(
s(
x),
s(
y)) →
le(
x,
y)
quot(
x,
y) →
if_quot(
minus(
x,
y),
y,
le(
y,
0'),
le(
y,
x))
if_quot(
x,
y,
true,
z) →
divByZeroErrorif_quot(
x,
y,
false,
true) →
s(
quot(
x,
y))
if_quot(
x,
y,
false,
false) →
0'Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
Generator Equations:
gen_0':s:divByZeroError3_0(0) ⇔ 0'
gen_0':s:divByZeroError3_0(+(x, 1)) ⇔ s(gen_0':s:divByZeroError3_0(x))
The following defined symbols remain to be analysed:
minus, le, quot
They will be analysed ascendingly in the following order:
minus < quot
le < quot
(9) RewriteLemmaProof (LOWER BOUND(ID) transformation)
Proved the following rewrite lemma:
minus(
gen_0':s:divByZeroError3_0(
n5_0),
gen_0':s:divByZeroError3_0(
n5_0)) →
gen_0':s:divByZeroError3_0(
0), rt ∈ Ω(1 + n5
0)
Induction Base:
minus(gen_0':s:divByZeroError3_0(0), gen_0':s:divByZeroError3_0(0)) →RΩ(1)
0'
Induction Step:
minus(gen_0':s:divByZeroError3_0(+(n5_0, 1)), gen_0':s:divByZeroError3_0(+(n5_0, 1))) →RΩ(1)
minus(gen_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) →IH
gen_0':s:divByZeroError3_0(0)
We have rt ∈ Ω(n1) and sz ∈ O(n). Thus, we have ircR ∈ Ω(n).
(10) Complex Obligation (BEST)
(11) Obligation:
TRS:
Rules:
minus(
x,
x) →
0'minus(
0',
x) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
le(
0',
y) →
truele(
s(
x),
0') →
falsele(
s(
x),
s(
y)) →
le(
x,
y)
quot(
x,
y) →
if_quot(
minus(
x,
y),
y,
le(
y,
0'),
le(
y,
x))
if_quot(
x,
y,
true,
z) →
divByZeroErrorif_quot(
x,
y,
false,
true) →
s(
quot(
x,
y))
if_quot(
x,
y,
false,
false) →
0'Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
Lemmas:
minus(gen_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
Generator Equations:
gen_0':s:divByZeroError3_0(0) ⇔ 0'
gen_0':s:divByZeroError3_0(+(x, 1)) ⇔ s(gen_0':s:divByZeroError3_0(x))
The following defined symbols remain to be analysed:
le, quot
They will be analysed ascendingly in the following order:
le < quot
(12) RewriteLemmaProof (LOWER BOUND(ID) transformation)
Proved the following rewrite lemma:
le(
gen_0':s:divByZeroError3_0(
n395_0),
gen_0':s:divByZeroError3_0(
n395_0)) →
true, rt ∈ Ω(1 + n395
0)
Induction Base:
le(gen_0':s:divByZeroError3_0(0), gen_0':s:divByZeroError3_0(0)) →RΩ(1)
true
Induction Step:
le(gen_0':s:divByZeroError3_0(+(n395_0, 1)), gen_0':s:divByZeroError3_0(+(n395_0, 1))) →RΩ(1)
le(gen_0':s:divByZeroError3_0(n395_0), gen_0':s:divByZeroError3_0(n395_0)) →IH
true
We have rt ∈ Ω(n1) and sz ∈ O(n). Thus, we have ircR ∈ Ω(n).
(13) Complex Obligation (BEST)
(14) Obligation:
TRS:
Rules:
minus(
x,
x) →
0'minus(
0',
x) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
le(
0',
y) →
truele(
s(
x),
0') →
falsele(
s(
x),
s(
y)) →
le(
x,
y)
quot(
x,
y) →
if_quot(
minus(
x,
y),
y,
le(
y,
0'),
le(
y,
x))
if_quot(
x,
y,
true,
z) →
divByZeroErrorif_quot(
x,
y,
false,
true) →
s(
quot(
x,
y))
if_quot(
x,
y,
false,
false) →
0'Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
Lemmas:
minus(gen_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
le(gen_0':s:divByZeroError3_0(n395_0), gen_0':s:divByZeroError3_0(n395_0)) → true, rt ∈ Ω(1 + n3950)
Generator Equations:
gen_0':s:divByZeroError3_0(0) ⇔ 0'
gen_0':s:divByZeroError3_0(+(x, 1)) ⇔ s(gen_0':s:divByZeroError3_0(x))
The following defined symbols remain to be analysed:
quot
(15) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)
Could not prove a rewrite lemma for the defined symbol quot.
(16) Obligation:
TRS:
Rules:
minus(
x,
x) →
0'minus(
0',
x) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
le(
0',
y) →
truele(
s(
x),
0') →
falsele(
s(
x),
s(
y)) →
le(
x,
y)
quot(
x,
y) →
if_quot(
minus(
x,
y),
y,
le(
y,
0'),
le(
y,
x))
if_quot(
x,
y,
true,
z) →
divByZeroErrorif_quot(
x,
y,
false,
true) →
s(
quot(
x,
y))
if_quot(
x,
y,
false,
false) →
0'Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
Lemmas:
minus(gen_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
le(gen_0':s:divByZeroError3_0(n395_0), gen_0':s:divByZeroError3_0(n395_0)) → true, rt ∈ Ω(1 + n3950)
Generator Equations:
gen_0':s:divByZeroError3_0(0) ⇔ 0'
gen_0':s:divByZeroError3_0(+(x, 1)) ⇔ s(gen_0':s:divByZeroError3_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':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
(18) BOUNDS(n^1, INF)
(19) Obligation:
TRS:
Rules:
minus(
x,
x) →
0'minus(
0',
x) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
le(
0',
y) →
truele(
s(
x),
0') →
falsele(
s(
x),
s(
y)) →
le(
x,
y)
quot(
x,
y) →
if_quot(
minus(
x,
y),
y,
le(
y,
0'),
le(
y,
x))
if_quot(
x,
y,
true,
z) →
divByZeroErrorif_quot(
x,
y,
false,
true) →
s(
quot(
x,
y))
if_quot(
x,
y,
false,
false) →
0'Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
Lemmas:
minus(gen_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
le(gen_0':s:divByZeroError3_0(n395_0), gen_0':s:divByZeroError3_0(n395_0)) → true, rt ∈ Ω(1 + n3950)
Generator Equations:
gen_0':s:divByZeroError3_0(0) ⇔ 0'
gen_0':s:divByZeroError3_0(+(x, 1)) ⇔ s(gen_0':s:divByZeroError3_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_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
(21) BOUNDS(n^1, INF)
(22) Obligation:
TRS:
Rules:
minus(
x,
x) →
0'minus(
0',
x) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
le(
0',
y) →
truele(
s(
x),
0') →
falsele(
s(
x),
s(
y)) →
le(
x,
y)
quot(
x,
y) →
if_quot(
minus(
x,
y),
y,
le(
y,
0'),
le(
y,
x))
if_quot(
x,
y,
true,
z) →
divByZeroErrorif_quot(
x,
y,
false,
true) →
s(
quot(
x,
y))
if_quot(
x,
y,
false,
false) →
0'Types:
minus :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
0' :: 0':s:divByZeroError
s :: 0':s:divByZeroError → 0':s:divByZeroError
le :: 0':s:divByZeroError → 0':s:divByZeroError → true:false
true :: true:false
false :: true:false
quot :: 0':s:divByZeroError → 0':s:divByZeroError → 0':s:divByZeroError
if_quot :: 0':s:divByZeroError → 0':s:divByZeroError → true:false → true:false → 0':s:divByZeroError
divByZeroError :: 0':s:divByZeroError
hole_0':s:divByZeroError1_0 :: 0':s:divByZeroError
hole_true:false2_0 :: true:false
gen_0':s:divByZeroError3_0 :: Nat → 0':s:divByZeroError
Lemmas:
minus(gen_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
Generator Equations:
gen_0':s:divByZeroError3_0(0) ⇔ 0'
gen_0':s:divByZeroError3_0(+(x, 1)) ⇔ s(gen_0':s:divByZeroError3_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_0':s:divByZeroError3_0(n5_0), gen_0':s:divByZeroError3_0(n5_0)) → gen_0':s:divByZeroError3_0(0), rt ∈ Ω(1 + n50)
(24) BOUNDS(n^1, INF)