(0) Obligation:
Runtime Complexity TRS:
The TRS R consists of the following rules:
minus(0, y) → 0
minus(x, 0) → x
minus(s(x), s(y)) → minus(x, y)
plus(0, y) → y
plus(s(x), y) → plus(x, s(y))
zero(s(x)) → false
zero(0) → true
p(s(x)) → x
div(x, y) → quot(x, y, 0)
quot(x, y, z) → if(zero(x), x, y, plus(z, s(0)))
if(true, x, y, z) → p(z)
if(false, x, s(y), z) → quot(minus(x, s(y)), s(y), z)
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(0', y) → 0'
minus(x, 0') → x
minus(s(x), s(y)) → minus(x, y)
plus(0', y) → y
plus(s(x), y) → plus(x, s(y))
zero(s(x)) → false
zero(0') → true
p(s(x)) → x
div(x, y) → quot(x, y, 0')
quot(x, y, z) → if(zero(x), x, y, plus(z, s(0')))
if(true, x, y, z) → p(z)
if(false, x, s(y), z) → quot(minus(x, s(y)), s(y), z)
S is empty.
Rewrite Strategy: FULL
(5) TypeInferenceProof (BOTH BOUNDS(ID, ID) transformation)
Infered types.
(6) Obligation:
TRS:
Rules:
minus(0', y) → 0'
minus(x, 0') → x
minus(s(x), s(y)) → minus(x, y)
plus(0', y) → y
plus(s(x), y) → plus(x, s(y))
zero(s(x)) → false
zero(0') → true
p(s(x)) → x
div(x, y) → quot(x, y, 0')
quot(x, y, z) → if(zero(x), x, y, plus(z, s(0')))
if(true, x, y, z) → p(z)
if(false, x, s(y), z) → quot(minus(x, s(y)), s(y), z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
(7) OrderProof (LOWER BOUND(ID) transformation)
Heuristically decided to analyse the following defined symbols:
minus,
plus,
quotThey will be analysed ascendingly in the following order:
minus < quot
plus < quot
(8) Obligation:
TRS:
Rules:
minus(
0',
y) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
plus(
0',
y) →
yplus(
s(
x),
y) →
plus(
x,
s(
y))
zero(
s(
x)) →
falsezero(
0') →
truep(
s(
x)) →
xdiv(
x,
y) →
quot(
x,
y,
0')
quot(
x,
y,
z) →
if(
zero(
x),
x,
y,
plus(
z,
s(
0')))
if(
true,
x,
y,
z) →
p(
z)
if(
false,
x,
s(
y),
z) →
quot(
minus(
x,
s(
y)),
s(
y),
z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))
The following defined symbols remain to be analysed:
minus, plus, quot
They will be analysed ascendingly in the following order:
minus < quot
plus < quot
(9) RewriteLemmaProof (LOWER BOUND(ID) transformation)
Proved the following rewrite lemma:
minus(
gen_0':s3_0(
n5_0),
gen_0':s3_0(
n5_0)) →
gen_0':s3_0(
0), rt ∈ Ω(1 + n5
0)
Induction Base:
minus(gen_0':s3_0(0), gen_0':s3_0(0)) →RΩ(1)
0'
Induction Step:
minus(gen_0':s3_0(+(n5_0, 1)), gen_0':s3_0(+(n5_0, 1))) →RΩ(1)
minus(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) →IH
gen_0':s3_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(
0',
y) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
plus(
0',
y) →
yplus(
s(
x),
y) →
plus(
x,
s(
y))
zero(
s(
x)) →
falsezero(
0') →
truep(
s(
x)) →
xdiv(
x,
y) →
quot(
x,
y,
0')
quot(
x,
y,
z) →
if(
zero(
x),
x,
y,
plus(
z,
s(
0')))
if(
true,
x,
y,
z) →
p(
z)
if(
false,
x,
s(
y),
z) →
quot(
minus(
x,
s(
y)),
s(
y),
z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_0(x))
The following defined symbols remain to be analysed:
plus, quot
They will be analysed ascendingly in the following order:
plus < quot
(12) RewriteLemmaProof (LOWER BOUND(ID) transformation)
Proved the following rewrite lemma:
plus(
gen_0':s3_0(
n275_0),
gen_0':s3_0(
b)) →
gen_0':s3_0(
+(
n275_0,
b)), rt ∈ Ω(1 + n275
0)
Induction Base:
plus(gen_0':s3_0(0), gen_0':s3_0(b)) →RΩ(1)
gen_0':s3_0(b)
Induction Step:
plus(gen_0':s3_0(+(n275_0, 1)), gen_0':s3_0(b)) →RΩ(1)
plus(gen_0':s3_0(n275_0), s(gen_0':s3_0(b))) →IH
gen_0':s3_0(+(+(b, 1), c276_0))
We have rt ∈ Ω(n1) and sz ∈ O(n). Thus, we have ircR ∈ Ω(n).
(13) Complex Obligation (BEST)
(14) Obligation:
TRS:
Rules:
minus(
0',
y) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
plus(
0',
y) →
yplus(
s(
x),
y) →
plus(
x,
s(
y))
zero(
s(
x)) →
falsezero(
0') →
truep(
s(
x)) →
xdiv(
x,
y) →
quot(
x,
y,
0')
quot(
x,
y,
z) →
if(
zero(
x),
x,
y,
plus(
z,
s(
0')))
if(
true,
x,
y,
z) →
p(
z)
if(
false,
x,
s(
y),
z) →
quot(
minus(
x,
s(
y)),
s(
y),
z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
plus(gen_0':s3_0(n275_0), gen_0':s3_0(b)) → gen_0':s3_0(+(n275_0, b)), rt ∈ Ω(1 + n2750)
Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_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(
0',
y) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
plus(
0',
y) →
yplus(
s(
x),
y) →
plus(
x,
s(
y))
zero(
s(
x)) →
falsezero(
0') →
truep(
s(
x)) →
xdiv(
x,
y) →
quot(
x,
y,
0')
quot(
x,
y,
z) →
if(
zero(
x),
x,
y,
plus(
z,
s(
0')))
if(
true,
x,
y,
z) →
p(
z)
if(
false,
x,
s(
y),
z) →
quot(
minus(
x,
s(
y)),
s(
y),
z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
plus(gen_0':s3_0(n275_0), gen_0':s3_0(b)) → gen_0':s3_0(+(n275_0, b)), rt ∈ Ω(1 + n2750)
Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_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':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
(18) BOUNDS(n^1, INF)
(19) Obligation:
TRS:
Rules:
minus(
0',
y) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
plus(
0',
y) →
yplus(
s(
x),
y) →
plus(
x,
s(
y))
zero(
s(
x)) →
falsezero(
0') →
truep(
s(
x)) →
xdiv(
x,
y) →
quot(
x,
y,
0')
quot(
x,
y,
z) →
if(
zero(
x),
x,
y,
plus(
z,
s(
0')))
if(
true,
x,
y,
z) →
p(
z)
if(
false,
x,
s(
y),
z) →
quot(
minus(
x,
s(
y)),
s(
y),
z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
plus(gen_0':s3_0(n275_0), gen_0':s3_0(b)) → gen_0':s3_0(+(n275_0, b)), rt ∈ Ω(1 + n2750)
Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_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':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
(21) BOUNDS(n^1, INF)
(22) Obligation:
TRS:
Rules:
minus(
0',
y) →
0'minus(
x,
0') →
xminus(
s(
x),
s(
y)) →
minus(
x,
y)
plus(
0',
y) →
yplus(
s(
x),
y) →
plus(
x,
s(
y))
zero(
s(
x)) →
falsezero(
0') →
truep(
s(
x)) →
xdiv(
x,
y) →
quot(
x,
y,
0')
quot(
x,
y,
z) →
if(
zero(
x),
x,
y,
plus(
z,
s(
0')))
if(
true,
x,
y,
z) →
p(
z)
if(
false,
x,
s(
y),
z) →
quot(
minus(
x,
s(
y)),
s(
y),
z)
Types:
minus :: 0':s → 0':s → 0':s
0' :: 0':s
s :: 0':s → 0':s
plus :: 0':s → 0':s → 0':s
zero :: 0':s → false:true
false :: false:true
true :: false:true
p :: 0':s → 0':s
div :: 0':s → 0':s → 0':s
quot :: 0':s → 0':s → 0':s → 0':s
if :: false:true → 0':s → 0':s → 0':s → 0':s
hole_0':s1_0 :: 0':s
hole_false:true2_0 :: false:true
gen_0':s3_0 :: Nat → 0':s
Lemmas:
minus(gen_0':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
Generator Equations:
gen_0':s3_0(0) ⇔ 0'
gen_0':s3_0(+(x, 1)) ⇔ s(gen_0':s3_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':s3_0(n5_0), gen_0':s3_0(n5_0)) → gen_0':s3_0(0), rt ∈ Ω(1 + n50)
(24) BOUNDS(n^1, INF)