7.79/3.51 YES 9.39/3.98 proof of /export/starexec/sandbox/benchmark/theBenchmark.hs 9.39/3.98 # AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty 9.39/3.98 9.39/3.98 9.39/3.98 H-Termination with start terms of the given HASKELL could be proven: 9.39/3.98 9.39/3.98 (0) HASKELL 9.39/3.98 (1) BR [EQUIVALENT, 0 ms] 9.39/3.98 (2) HASKELL 9.39/3.98 (3) COR [EQUIVALENT, 0 ms] 9.39/3.98 (4) HASKELL 9.39/3.98 (5) Narrow [SOUND, 0 ms] 9.39/3.98 (6) QDP 9.39/3.98 (7) QDPSizeChangeProof [EQUIVALENT, 0 ms] 9.39/3.98 (8) YES 9.39/3.98 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (0) 9.39/3.98 Obligation: 9.39/3.98 mainModule Main 9.39/3.98 module Main where { 9.39/3.98 import qualified Prelude; 9.39/3.98 data List a = Cons a (List a) | Nil ; 9.39/3.98 9.39/3.98 scanl :: (b -> a -> b) -> b -> List a -> List b; 9.39/3.98 scanl f q xs = Cons q (scanl0 f q xs); 9.39/3.98 9.39/3.98 scanl0 f q Nil = Nil; 9.39/3.98 scanl0 f q (Cons x xs) = scanl f (f q x) xs; 9.39/3.98 9.39/3.98 } 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (1) BR (EQUIVALENT) 9.39/3.98 Replaced joker patterns by fresh variables and removed binding patterns. 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (2) 9.39/3.98 Obligation: 9.39/3.98 mainModule Main 9.39/3.98 module Main where { 9.39/3.98 import qualified Prelude; 9.39/3.98 data List a = Cons a (List a) | Nil ; 9.39/3.98 9.39/3.98 scanl :: (a -> b -> a) -> a -> List b -> List a; 9.39/3.98 scanl f q xs = Cons q (scanl0 f q xs); 9.39/3.98 9.39/3.98 scanl0 f q Nil = Nil; 9.39/3.98 scanl0 f q (Cons x xs) = scanl f (f q x) xs; 9.39/3.98 9.39/3.98 } 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (3) COR (EQUIVALENT) 9.39/3.98 Cond Reductions: 9.39/3.98 The following Function with conditions 9.39/3.98 "undefined |Falseundefined; 9.39/3.98 " 9.39/3.98 is transformed to 9.39/3.98 "undefined = undefined1; 9.39/3.98 " 9.39/3.98 "undefined0 True = undefined; 9.39/3.98 " 9.39/3.98 "undefined1 = undefined0 False; 9.39/3.98 " 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (4) 9.39/3.98 Obligation: 9.39/3.98 mainModule Main 9.39/3.98 module Main where { 9.39/3.98 import qualified Prelude; 9.39/3.98 data List a = Cons a (List a) | Nil ; 9.39/3.98 9.39/3.98 scanl :: (a -> b -> a) -> a -> List b -> List a; 9.39/3.98 scanl f q xs = Cons q (scanl0 f q xs); 9.39/3.98 9.39/3.98 scanl0 f q Nil = Nil; 9.39/3.98 scanl0 f q (Cons x xs) = scanl f (f q x) xs; 9.39/3.98 9.39/3.98 } 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (5) Narrow (SOUND) 9.39/3.98 Haskell To QDPs 9.39/3.98 9.39/3.98 digraph dp_graph { 9.39/3.98 node [outthreshold=100, inthreshold=100];1[label="scanl",fontsize=16,color="grey",shape="box"];1 -> 3[label="",style="dashed", color="grey", weight=3]; 9.39/3.98 3[label="scanl vx3",fontsize=16,color="grey",shape="box"];3 -> 4[label="",style="dashed", color="grey", weight=3]; 9.39/3.98 4[label="scanl vx3 vx4",fontsize=16,color="grey",shape="box"];4 -> 5[label="",style="dashed", color="grey", weight=3]; 9.39/3.98 5[label="scanl vx3 vx4 vx5",fontsize=16,color="black",shape="triangle"];5 -> 6[label="",style="solid", color="black", weight=3]; 9.39/3.98 6[label="Cons vx4 (scanl0 vx3 vx4 vx5)",fontsize=16,color="green",shape="box"];6 -> 7[label="",style="dashed", color="green", weight=3]; 9.39/3.98 7[label="scanl0 vx3 vx4 vx5",fontsize=16,color="burlywood",shape="box"];16[label="vx5/Cons vx50 vx51",fontsize=10,color="white",style="solid",shape="box"];7 -> 16[label="",style="solid", color="burlywood", weight=9]; 9.39/3.98 16 -> 8[label="",style="solid", color="burlywood", weight=3]; 9.39/3.98 17[label="vx5/Nil",fontsize=10,color="white",style="solid",shape="box"];7 -> 17[label="",style="solid", color="burlywood", weight=9]; 9.39/3.98 17 -> 9[label="",style="solid", color="burlywood", weight=3]; 9.39/3.98 8[label="scanl0 vx3 vx4 (Cons vx50 vx51)",fontsize=16,color="black",shape="box"];8 -> 10[label="",style="solid", color="black", weight=3]; 9.39/3.98 9[label="scanl0 vx3 vx4 Nil",fontsize=16,color="black",shape="box"];9 -> 11[label="",style="solid", color="black", weight=3]; 9.39/3.98 10 -> 5[label="",style="dashed", color="red", weight=0]; 9.39/3.98 10[label="scanl vx3 (vx3 vx4 vx50) vx51",fontsize=16,color="magenta"];10 -> 12[label="",style="dashed", color="magenta", weight=3]; 9.39/3.98 10 -> 13[label="",style="dashed", color="magenta", weight=3]; 9.39/3.98 11[label="Nil",fontsize=16,color="green",shape="box"];12[label="vx51",fontsize=16,color="green",shape="box"];13[label="vx3 vx4 vx50",fontsize=16,color="green",shape="box"];13 -> 14[label="",style="dashed", color="green", weight=3]; 9.39/3.98 13 -> 15[label="",style="dashed", color="green", weight=3]; 9.39/3.98 14[label="vx4",fontsize=16,color="green",shape="box"];15[label="vx50",fontsize=16,color="green",shape="box"];} 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (6) 9.39/3.98 Obligation: 9.39/3.98 Q DP problem: 9.39/3.98 The TRS P consists of the following rules: 9.39/3.98 9.39/3.98 new_scanl(vx3, Cons(vx50, vx51), h, ba) -> new_scanl(vx3, vx51, h, ba) 9.39/3.98 9.39/3.98 R is empty. 9.39/3.98 Q is empty. 9.39/3.98 We have to consider all minimal (P,Q,R)-chains. 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (7) QDPSizeChangeProof (EQUIVALENT) 9.39/3.98 By using the subterm criterion [SUBTERM_CRITERION] together with the size-change analysis [AAECC05] we have proven that there are no infinite chains for this DP problem. 9.39/3.98 9.39/3.98 From the DPs we obtained the following set of size-change graphs: 9.39/3.98 *new_scanl(vx3, Cons(vx50, vx51), h, ba) -> new_scanl(vx3, vx51, h, ba) 9.39/3.98 The graph contains the following edges 1 >= 1, 2 > 2, 3 >= 3, 4 >= 4 9.39/3.98 9.39/3.98 9.39/3.98 ---------------------------------------- 9.39/3.98 9.39/3.98 (8) 9.39/3.98 YES 9.53/4.02 EOF