WORST_CASE(Omega(n^1), O(n^2))
proof of /export/starexec/sandbox2/benchmark/theBenchmark.xml
# AProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty


The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(n^1, n^2).

(0) CpxTRS
(1) RelTrsToWeightedTrsProof [BOTH BOUNDS(ID, ID), 0 ms]
(2) CpxWeightedTrs
    (3) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms]
    (4) CpxTypedWeightedTrs
    (5) CompletionProof [UPPER BOUND(ID), 0 ms]
    (6) CpxTypedWeightedCompleteTrs
    (7) NarrowingProof [BOTH BOUNDS(ID, ID), 0 ms]
    (8) CpxTypedWeightedCompleteTrs
    (9) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms]
    (10) CpxRNTS
    (11) SimplificationProof [BOTH BOUNDS(ID, ID), 0 ms]
    (12) CpxRNTS
    (13) CpxRntsAnalysisOrderProof [BOTH BOUNDS(ID, ID), 0 ms]
    (14) CpxRNTS
    (15) ResultPropagationProof [UPPER BOUND(ID), 0 ms]
    (16) CpxRNTS
    (17) IntTrsBoundProof [UPPER BOUND(ID), 344 ms]
    (18) CpxRNTS
    (19) IntTrsBoundProof [UPPER BOUND(ID), 27 ms]
    (20) CpxRNTS
    (21) ResultPropagationProof [UPPER BOUND(ID), 0 ms]
    (22) CpxRNTS
    (23) IntTrsBoundProof [UPPER BOUND(ID), 456 ms]
    (24) CpxRNTS
    (25) IntTrsBoundProof [UPPER BOUND(ID), 187 ms]
    (26) CpxRNTS
    (27) FinalProof [FINISHED, 0 ms]
    (28) BOUNDS(1, n^2)
(29) RelTrsToDecreasingLoopProblemProof [LOWER BOUND(ID), 0 ms]
(30) TRS for Loop Detection
    (31) DecreasingLoopProof [LOWER BOUND(ID), 0 ms]
    (32) BEST
        (33) proven lower bound
            (34) LowerBoundPropagationProof [FINISHED, 0 ms]
            (35) BOUNDS(n^1, INF)
        (36) TRS for Loop Detection


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(0)
Obligation:
The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(n^1, n^2).


The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0
   quot(s(x), s(y), z) -> quot(x, y, z)
   plus(0, y) -> y
   plus(s(x), y) -> s(plus(x, y))
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z)))

S is empty.
Rewrite Strategy: INNERMOST
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(1) RelTrsToWeightedTrsProof (BOTH BOUNDS(ID, ID))
Transformed relative TRS to weighted TRS
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(2)
Obligation:
The Runtime Complexity (innermost) of the given CpxWeightedTrs could be proven to be BOUNDS(1, n^2).


The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0 [1]
   quot(s(x), s(y), z) -> quot(x, y, z) [1]
   plus(0, y) -> y [1]
   plus(s(x), y) -> s(plus(x, y)) [1]
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z))) [1]

Rewrite Strategy: INNERMOST
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(3) TypeInferenceProof (BOTH BOUNDS(ID, ID))
Infered types.
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(4)
Obligation:
Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0 [1]
   quot(s(x), s(y), z) -> quot(x, y, z) [1]
   plus(0, y) -> y [1]
   plus(s(x), y) -> s(plus(x, y)) [1]
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z))) [1]

The TRS has the following type information:
quot :: 0:s -> 0:s -> 0:s -> 0:s
0 :: 0:s
s :: 0:s -> 0:s
plus :: 0:s -> 0:s -> 0:s

Rewrite Strategy: INNERMOST
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(5) CompletionProof (UPPER BOUND(ID))
The transformation into a RNTS is sound, since:

(a) The obligation is a constructor system where every type has a constant constructor,

(b) The following defined symbols do not have to be completely defined, as they can never occur inside other defined symbols:

   quot_3

(c) The following functions are completely defined:

   plus_2

Due to the following rules being added:
none

And the following fresh constants: none

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(6)
Obligation:
Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0 [1]
   quot(s(x), s(y), z) -> quot(x, y, z) [1]
   plus(0, y) -> y [1]
   plus(s(x), y) -> s(plus(x, y)) [1]
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z))) [1]

The TRS has the following type information:
quot :: 0:s -> 0:s -> 0:s -> 0:s
0 :: 0:s
s :: 0:s -> 0:s
plus :: 0:s -> 0:s -> 0:s

Rewrite Strategy: INNERMOST
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(7) NarrowingProof (BOTH BOUNDS(ID, ID))
Narrowed the inner basic terms of all right-hand sides by a single narrowing step.
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(8)
Obligation:
Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is:

Runtime Complexity Weighted TRS with Types.
The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0 [1]
   quot(s(x), s(y), z) -> quot(x, y, z) [1]
   plus(0, y) -> y [1]
   plus(s(x), y) -> s(plus(x, y)) [1]
   quot(x, 0, s(0)) -> s(quot(x, s(0), s(0))) [2]
   quot(x, 0, s(s(x'))) -> s(quot(x, s(plus(x', s(0))), s(s(x')))) [2]

The TRS has the following type information:
quot :: 0:s -> 0:s -> 0:s -> 0:s
0 :: 0:s
s :: 0:s -> 0:s
plus :: 0:s -> 0:s -> 0:s

Rewrite Strategy: INNERMOST
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(9) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID))
Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction.
The constant constructors are abstracted as follows:

   0 => 0

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(10)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> y :|: z'' = y, y >= 0, z' = 0
   plus(z', z'') -{ 1 }-> 1 + plus(x, y) :|: z' = 1 + x, z'' = y, x >= 0, y >= 0
   quot(z', z'', z1) -{ 1 }-> quot(x, y, z) :|: z' = 1 + x, z1 = z, z >= 0, x >= 0, y >= 0, z'' = 1 + y
   quot(z', z'', z1) -{ 1 }-> 0 :|: z >= 0, y >= 0, z'' = 1 + y, z1 = 1 + z, z' = 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(x, 1 + plus(x', 1 + 0), 1 + (1 + x')) :|: z'' = 0, z' = x, x >= 0, x' >= 0, z1 = 1 + (1 + x')
   quot(z', z'', z1) -{ 2 }-> 1 + quot(x, 1 + 0, 1 + 0) :|: z'' = 0, z' = x, z1 = 1 + 0, x >= 0


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(11) SimplificationProof (BOTH BOUNDS(ID, ID))
Simplified the RNTS by moving equalities from the constraints into the right-hand sides.
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(12)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 }-> 1 + plus(z' - 1, z'') :|: z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + plus(z1 - 2, 1 + 0), 1 + (1 + (z1 - 2))) :|: z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0


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(13) CpxRntsAnalysisOrderProof (BOTH BOUNDS(ID, ID))
Found the following analysis order by SCC decomposition:

   { plus }
   { quot }

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(14)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 }-> 1 + plus(z' - 1, z'') :|: z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + plus(z1 - 2, 1 + 0), 1 + (1 + (z1 - 2))) :|: z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: {plus}, {quot}

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(15) ResultPropagationProof (UPPER BOUND(ID))
Applied inner abstraction using the recently inferred runtime/size bounds where possible.
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(16)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 }-> 1 + plus(z' - 1, z'') :|: z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + plus(z1 - 2, 1 + 0), 1 + (1 + (z1 - 2))) :|: z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: {plus}, {quot}

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(17) IntTrsBoundProof (UPPER BOUND(ID))

Computed SIZE bound using CoFloCo for: plus
after applying outer abstraction to obtain an ITS,
resulting in: O(n^1) with polynomial bound: z' + z''

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(18)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 }-> 1 + plus(z' - 1, z'') :|: z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + plus(z1 - 2, 1 + 0), 1 + (1 + (z1 - 2))) :|: z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: {plus}, {quot}
Previous analysis results are:
  plus: runtime: ?, size: O(n^1) [z' + z'']

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(19) IntTrsBoundProof (UPPER BOUND(ID))

Computed RUNTIME bound using CoFloCo for: plus
after applying outer abstraction to obtain an ITS,
resulting in: O(n^1) with polynomial bound: 1 + z'

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(20)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 }-> 1 + plus(z' - 1, z'') :|: z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + plus(z1 - 2, 1 + 0), 1 + (1 + (z1 - 2))) :|: z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: {quot}
Previous analysis results are:
  plus: runtime: O(n^1) [1 + z'], size: O(n^1) [z' + z'']

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(21) ResultPropagationProof (UPPER BOUND(ID))
Applied inner abstraction using the recently inferred runtime/size bounds where possible.
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(22)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 + z' }-> 1 + s :|: s >= 0, s <= z' - 1 + z'', z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 1 + z1 }-> 1 + quot(z', 1 + s', 1 + (1 + (z1 - 2))) :|: s' >= 0, s' <= z1 - 2 + (1 + 0), z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: {quot}
Previous analysis results are:
  plus: runtime: O(n^1) [1 + z'], size: O(n^1) [z' + z'']

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(23) IntTrsBoundProof (UPPER BOUND(ID))

Computed SIZE bound using KoAT for: quot
after applying outer abstraction to obtain an ITS,
resulting in: O(n^1) with polynomial bound: 2 + 2*z'

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(24)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 + z' }-> 1 + s :|: s >= 0, s <= z' - 1 + z'', z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 1 + z1 }-> 1 + quot(z', 1 + s', 1 + (1 + (z1 - 2))) :|: s' >= 0, s' <= z1 - 2 + (1 + 0), z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: {quot}
Previous analysis results are:
  plus: runtime: O(n^1) [1 + z'], size: O(n^1) [z' + z'']
  quot: runtime: ?, size: O(n^1) [2 + 2*z']

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(25) IntTrsBoundProof (UPPER BOUND(ID))

Computed RUNTIME bound using KoAT for: quot
after applying outer abstraction to obtain an ITS,
resulting in: O(n^2) with polynomial bound: 5 + 5*z' + z'*z1 + z1

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(26)
Obligation:
Complexity RNTS consisting of the following rules:

   plus(z', z'') -{ 1 }-> z'' :|: z'' >= 0, z' = 0
   plus(z', z'') -{ 1 + z' }-> 1 + s :|: s >= 0, s <= z' - 1 + z'', z' - 1 >= 0, z'' >= 0
   quot(z', z'', z1) -{ 1 }-> quot(z' - 1, z'' - 1, z1) :|: z1 >= 0, z' - 1 >= 0, z'' - 1 >= 0
   quot(z', z'', z1) -{ 1 }-> 0 :|: z1 - 1 >= 0, z'' - 1 >= 0, z' = 0
   quot(z', z'', z1) -{ 1 + z1 }-> 1 + quot(z', 1 + s', 1 + (1 + (z1 - 2))) :|: s' >= 0, s' <= z1 - 2 + (1 + 0), z'' = 0, z' >= 0, z1 - 2 >= 0
   quot(z', z'', z1) -{ 2 }-> 1 + quot(z', 1 + 0, 1 + 0) :|: z'' = 0, z1 = 1 + 0, z' >= 0

Function symbols to be analyzed: 
Previous analysis results are:
  plus: runtime: O(n^1) [1 + z'], size: O(n^1) [z' + z'']
  quot: runtime: O(n^2) [5 + 5*z' + z'*z1 + z1], size: O(n^1) [2 + 2*z']

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(27) FinalProof (FINISHED)
Computed overall runtime complexity
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(28)
BOUNDS(1, n^2)

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(29) RelTrsToDecreasingLoopProblemProof (LOWER BOUND(ID))
Transformed a relative TRS into a decreasing-loop problem.
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(30)
Obligation:
Analyzing the following TRS for decreasing loops:

The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(n^1, n^2).


The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0
   quot(s(x), s(y), z) -> quot(x, y, z)
   plus(0, y) -> y
   plus(s(x), y) -> s(plus(x, y))
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z)))

S is empty.
Rewrite Strategy: INNERMOST
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(31) DecreasingLoopProof (LOWER BOUND(ID))
The following loop(s) give(s) rise to the lower bound Omega(n^1):

The rewrite sequence

plus(s(x), y) ->^+ s(plus(x, y))

gives rise to a decreasing loop by considering the right hand sides subterm at position [0].

The pumping substitution is [x / s(x)].

The result substitution is [ ].




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(32)
Complex Obligation (BEST)

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(33)
Obligation:
Proved the lower bound n^1 for the following obligation:

The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(n^1, n^2).


The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0
   quot(s(x), s(y), z) -> quot(x, y, z)
   plus(0, y) -> y
   plus(s(x), y) -> s(plus(x, y))
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z)))

S is empty.
Rewrite Strategy: INNERMOST
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(34) LowerBoundPropagationProof (FINISHED)
Propagated lower bound.
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(35)
BOUNDS(n^1, INF)

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(36)
Obligation:
Analyzing the following TRS for decreasing loops:

The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(n^1, n^2).


The TRS R consists of the following rules:

   quot(0, s(y), s(z)) -> 0
   quot(s(x), s(y), z) -> quot(x, y, z)
   plus(0, y) -> y
   plus(s(x), y) -> s(plus(x, y))
   quot(x, 0, s(z)) -> s(quot(x, plus(z, s(0)), s(z)))

S is empty.
Rewrite Strategy: INNERMOST