YES 0.856
H-Termination proof of /home/matraf/haskell/eval_FullyBlown_Fast/empty.hs
H-Termination of the given Haskell-Program with start terms could successfully be proven:
↳ HASKELL
↳ BR
mainModule Main
| ((take :: Int -> [a] -> [a]) :: Int -> [a] -> [a]) |
module Main where
Replaced joker patterns by fresh variables and removed binding patterns.
↳ HASKELL
↳ BR
↳ HASKELL
↳ COR
mainModule Main
| ((take :: Int -> [a] -> [a]) :: Int -> [a] -> [a]) |
module Main where
Cond Reductions:
The following Function with conditions
is transformed to
undefined0 | True | = undefined |
undefined1 | | = undefined0 False |
The following Function with conditions
take | n vv | |
take | vw [] | = [] |
take | n (x : xs) | = x : take (n - 1) xs |
is transformed to
take | n vv | = take3 n vv |
take | vw [] | = take1 vw [] |
take | n (x : xs) | = take0 n (x : xs) |
take0 | n (x : xs) | = x : take (n - 1) xs |
take1 | vw [] | = [] |
take1 | wv ww | = take0 wv ww |
take2 | n vv True | = [] |
take2 | n vv False | = take1 n vv |
take3 | n vv | = take2 n vv (n <= 0) |
take3 | wx wy | = take1 wx wy |
↳ HASKELL
↳ BR
↳ HASKELL
↳ COR
↳ HASKELL
↳ NumRed
mainModule Main
| ((take :: Int -> [a] -> [a]) :: Int -> [a] -> [a]) |
module Main where
Num Reduction: All numbers are transformed to thier corresponding representation with Pos, Neg, Succ and Zero.
↳ HASKELL
↳ BR
↳ HASKELL
↳ COR
↳ HASKELL
↳ NumRed
↳ HASKELL
↳ Narrow
mainModule Main
| (take :: Int -> [a] -> [a]) |
module Main where
Haskell To QDPs
↳ HASKELL
↳ BR
↳ HASKELL
↳ COR
↳ HASKELL
↳ NumRed
↳ HASKELL
↳ Narrow
↳ QDP
↳ QDPSizeChangeProof
Q DP problem:
The TRS P consists of the following rules:
new_take(Pos(Succ(wz300)), :(wz40, wz41), ba) → new_take(new_primMinusNat(wz300), wz41, ba)
The TRS R consists of the following rules:
new_primMinusNat(Succ(wz3000)) → Pos(Succ(wz3000))
new_primMinusNat(Zero) → Pos(Zero)
The set Q consists of the following terms:
new_primMinusNat(Succ(x0))
new_primMinusNat(Zero)
We have to consider all minimal (P,Q,R)-chains.
By using the subterm criterion [20] together with the size-change analysis [32] we have proven that there are no infinite chains for this DP problem. From the DPs we obtained the following set of size-change graphs:
- new_take(Pos(Succ(wz300)), :(wz40, wz41), ba) → new_take(new_primMinusNat(wz300), wz41, ba)
The graph contains the following edges 2 > 2, 3 >= 3