Left Termination of the query pattern
qs(g,a)
w.r.t. the given Prolog program could successfully be proven:

0 Prolog
↳1 UndefinedPredicateHandlerProof (⇒, 0 ms)
↳2 Prolog
↳3 PrologToPiTRSProof (⇒, 69 ms)
↳4 PiTRS
↳5 DependencyPairsProof (⇔, 91 ms)
↳6 PiDP
↳7 DependencyGraphProof (⇔, 0 ms)
↳8 AND
    ↳9 PiDP
        ↳10 UsableRulesProof (⇔, 0 ms)
        ↳11 PiDP
        ↳12 PiDPToQDPProof (⇒, 6 ms)
        ↳13 QDP
        ↳14 QDPSizeChangeProof (⇔, 0 ms)
        ↳15 YES
    ↳16 PiDP
        ↳17 UsableRulesProof (⇔, 0 ms)
        ↳18 PiDP
        ↳19 PiDPToQDPProof (⇒, 0 ms)
        ↳20 QDP
        ↳21 QDPSizeChangeProof (⇔, 0 ms)
        ↳22 YES
    ↳23 PiDP
        ↳24 PiDPToQDPProof (⇒, 0 ms)
        ↳25 QDP
        ↳26 QDPOrderProof (⇔, 140 ms)
        ↳27 QDP
        ↳28 DependencyGraphProof (⇔, 0 ms)
        ↳29 TRUE

(0) Obligation:

Clauses:

qs(.(X, Xs), Ys) :- ','(part(X, Xs, Littles, Bigs), ','(qs(Littles, Ls), ','(qs(Bigs, Bs), app(Ls, .(X, Bs), Ys)))).
qs([], []).
part(X, .(Y, Xs), .(Y, Ls), Bs) :- ','(>(X, Y), part(X, Xs, Ls, Bs)).
part(X, .(Y, Xs), Ls, .(Y, Bs)) :- ','(=<(X, Y), part(X, Xs, Ls, Bs)).
part(X, [], [], []).
app(.(X, Xs), Ys, .(X, Zs)) :- app(Xs, Ys, Zs).
app([], Ys, Ys).

Query: qs(g,a)

(1) UndefinedPredicateHandlerProof (SOUND transformation)

Added facts for all undefined predicates [PROLOG].

(2) Obligation:

Clauses:

qs(.(X, Xs), Ys) :- ','(part(X, Xs, Littles, Bigs), ','(qs(Littles, Ls), ','(qs(Bigs, Bs), app(Ls, .(X, Bs), Ys)))).
qs([], []).
part(X, .(Y, Xs), .(Y, Ls), Bs) :- ','(>(X, Y), part(X, Xs, Ls, Bs)).
part(X, .(Y, Xs), Ls, .(Y, Bs)) :- ','(=<(X, Y), part(X, Xs, Ls, Bs)).
part(X, [], [], []).
app(.(X, Xs), Ys, .(X, Zs)) :- app(Xs, Ys, Zs).
app([], Ys, Ys).
>(X0, X1).
=<(X0, X1).

Query: qs(g,a)

(3) PrologToPiTRSProof (SOUND transformation)

We use the technique of [TOCL09]. With regard to the inferred argument filtering the predicates were used in the following modes:
qs_in: (b,f)
part_in: (b,b,f,f)
app_in: (b,b,f)
Transforming Prolog into the following Term Rewriting System:
Pi-finite rewrite system:
The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)

Infinitary Constructor Rewriting Termination of PiTRS implies Termination of Prolog

(4) Obligation:

Pi-finite rewrite system:
The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)

(5) DependencyPairsProof (EQUIVALENT transformation)

Using Dependency Pairs [AG00,LOPSTR] we result in the following initial DP problem:
Pi DP problem:
The TRS P consists of the following rules:

QS_IN_GA(.(X, Xs), Ys) → U1_GA(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
QS_IN_GA(.(X, Xs), Ys) → PART_IN_GGAA(X, Xs, Littles, Bigs)
PART_IN_GGAA(X, .(Y, Xs), .(Y, Ls), Bs) → U5_GGAA(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs), .(Y, Ls), Bs) → >_IN_GG(X, Y)
U5_GGAA(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_GGAA(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
U5_GGAA(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)
PART_IN_GGAA(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_GGAA(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs), Ls, .(Y, Bs)) → =<_IN_GG(X, Y)
U7_GGAA(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_GGAA(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
U7_GGAA(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)
U1_GA(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_GA(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
U1_GA(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → QS_IN_GA(Littles, Ls)
U2_GA(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_GA(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U2_GA(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → QS_IN_GA(Bigs, Bs)
U3_GA(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_GA(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
U3_GA(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → APP_IN_GGA(Ls, .(X, Bs), Ys)
APP_IN_GGA(.(X, Xs), Ys, .(X, Zs)) → U9_GGA(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
APP_IN_GGA(.(X, Xs), Ys, .(X, Zs)) → APP_IN_GGA(Xs, Ys, Zs)

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)
QS_IN_GA(x1, x2)  =  QS_IN_GA(x1)
U1_GA(x1, x2, x3, x4)  =  U1_GA(x1, x4)
PART_IN_GGAA(x1, x2, x3, x4)  =  PART_IN_GGAA(x1, x2)
U5_GGAA(x1, x2, x3, x4, x5, x6)  =  U5_GGAA(x1, x2, x3, x6)
>_IN_GG(x1, x2)  =  >_IN_GG(x1, x2)
U6_GGAA(x1, x2, x3, x4, x5, x6)  =  U6_GGAA(x2, x6)
U7_GGAA(x1, x2, x3, x4, x5, x6)  =  U7_GGAA(x1, x2, x3, x6)
=<_IN_GG(x1, x2)  =  =<_IN_GG(x1, x2)
U8_GGAA(x1, x2, x3, x4, x5, x6)  =  U8_GGAA(x2, x6)
U2_GA(x1, x2, x3, x4, x5)  =  U2_GA(x1, x4, x5)
U3_GA(x1, x2, x3, x4, x5)  =  U3_GA(x1, x4, x5)
U4_GA(x1, x2, x3, x4)  =  U4_GA(x4)
APP_IN_GGA(x1, x2, x3)  =  APP_IN_GGA(x1, x2)
U9_GGA(x1, x2, x3, x4, x5)  =  U9_GGA(x1, x5)

We have to consider all (P,R,Pi)-chains

(6) Obligation:

Pi DP problem:
The TRS P consists of the following rules:

QS_IN_GA(.(X, Xs), Ys) → U1_GA(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
QS_IN_GA(.(X, Xs), Ys) → PART_IN_GGAA(X, Xs, Littles, Bigs)
PART_IN_GGAA(X, .(Y, Xs), .(Y, Ls), Bs) → U5_GGAA(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs), .(Y, Ls), Bs) → >_IN_GG(X, Y)
U5_GGAA(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_GGAA(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
U5_GGAA(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)
PART_IN_GGAA(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_GGAA(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs), Ls, .(Y, Bs)) → =<_IN_GG(X, Y)
U7_GGAA(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_GGAA(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
U7_GGAA(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)
U1_GA(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_GA(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
U1_GA(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → QS_IN_GA(Littles, Ls)
U2_GA(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_GA(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U2_GA(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → QS_IN_GA(Bigs, Bs)
U3_GA(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_GA(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
U3_GA(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → APP_IN_GGA(Ls, .(X, Bs), Ys)
APP_IN_GGA(.(X, Xs), Ys, .(X, Zs)) → U9_GGA(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
APP_IN_GGA(.(X, Xs), Ys, .(X, Zs)) → APP_IN_GGA(Xs, Ys, Zs)

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)
QS_IN_GA(x1, x2)  =  QS_IN_GA(x1)
U1_GA(x1, x2, x3, x4)  =  U1_GA(x1, x4)
PART_IN_GGAA(x1, x2, x3, x4)  =  PART_IN_GGAA(x1, x2)
U5_GGAA(x1, x2, x3, x4, x5, x6)  =  U5_GGAA(x1, x2, x3, x6)
>_IN_GG(x1, x2)  =  >_IN_GG(x1, x2)
U6_GGAA(x1, x2, x3, x4, x5, x6)  =  U6_GGAA(x2, x6)
U7_GGAA(x1, x2, x3, x4, x5, x6)  =  U7_GGAA(x1, x2, x3, x6)
=<_IN_GG(x1, x2)  =  =<_IN_GG(x1, x2)
U8_GGAA(x1, x2, x3, x4, x5, x6)  =  U8_GGAA(x2, x6)
U2_GA(x1, x2, x3, x4, x5)  =  U2_GA(x1, x4, x5)
U3_GA(x1, x2, x3, x4, x5)  =  U3_GA(x1, x4, x5)
U4_GA(x1, x2, x3, x4)  =  U4_GA(x4)
APP_IN_GGA(x1, x2, x3)  =  APP_IN_GGA(x1, x2)
U9_GGA(x1, x2, x3, x4, x5)  =  U9_GGA(x1, x5)

We have to consider all (P,R,Pi)-chains

(7) DependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LOPSTR] contains 3 SCCs with 9 less nodes.

(8) Complex Obligation (AND)

(9) Obligation:

Pi DP problem:
The TRS P consists of the following rules:

APP_IN_GGA(.(X, Xs), Ys, .(X, Zs)) → APP_IN_GGA(Xs, Ys, Zs)

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)
APP_IN_GGA(x1, x2, x3)  =  APP_IN_GGA(x1, x2)

We have to consider all (P,R,Pi)-chains

(10) UsableRulesProof (EQUIVALENT transformation)

For (infinitary) constructor rewriting [LOPSTR] we can delete all non-usable rules from R.

(11) Obligation:

Pi DP problem:
The TRS P consists of the following rules:

APP_IN_GGA(.(X, Xs), Ys, .(X, Zs)) → APP_IN_GGA(Xs, Ys, Zs)

R is empty.
The argument filtering Pi contains the following mapping:
.(x1, x2)  =  .(x1, x2)
APP_IN_GGA(x1, x2, x3)  =  APP_IN_GGA(x1, x2)

We have to consider all (P,R,Pi)-chains

(12) PiDPToQDPProof (SOUND transformation)

Transforming (infinitary) constructor rewriting Pi-DP problem [LOPSTR] into ordinary QDP problem [LPAR04] by application of Pi.

(13) Obligation:

Q DP problem:
The TRS P consists of the following rules:

APP_IN_GGA(.(X, Xs), Ys) → APP_IN_GGA(Xs, Ys)

R is empty.
Q is empty.
We have to consider all (P,Q,R)-chains.

(14) QDPSizeChangeProof (EQUIVALENT transformation)

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.

From the DPs we obtained the following set of size-change graphs:

  • APP_IN_GGA(.(X, Xs), Ys) → APP_IN_GGA(Xs, Ys)
    The graph contains the following edges 1 > 1, 2 >= 2

(15) YES

(16) Obligation:

Pi DP problem:
The TRS P consists of the following rules:

U5_GGAA(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)
PART_IN_GGAA(X, .(Y, Xs), .(Y, Ls), Bs) → U5_GGAA(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_GGAA(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
U7_GGAA(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)
PART_IN_GGAA(x1, x2, x3, x4)  =  PART_IN_GGAA(x1, x2)
U5_GGAA(x1, x2, x3, x4, x5, x6)  =  U5_GGAA(x1, x2, x3, x6)
U7_GGAA(x1, x2, x3, x4, x5, x6)  =  U7_GGAA(x1, x2, x3, x6)

We have to consider all (P,R,Pi)-chains

(17) UsableRulesProof (EQUIVALENT transformation)

For (infinitary) constructor rewriting [LOPSTR] we can delete all non-usable rules from R.

(18) Obligation:

Pi DP problem:
The TRS P consists of the following rules:

U5_GGAA(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)
PART_IN_GGAA(X, .(Y, Xs), .(Y, Ls), Bs) → U5_GGAA(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_GGAA(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
U7_GGAA(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → PART_IN_GGAA(X, Xs, Ls, Bs)

The TRS R consists of the following rules:

>_in_gg(X0, X1) → >_out_gg(X0, X1)
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)

The argument filtering Pi contains the following mapping:
.(x1, x2)  =  .(x1, x2)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
PART_IN_GGAA(x1, x2, x3, x4)  =  PART_IN_GGAA(x1, x2)
U5_GGAA(x1, x2, x3, x4, x5, x6)  =  U5_GGAA(x1, x2, x3, x6)
U7_GGAA(x1, x2, x3, x4, x5, x6)  =  U7_GGAA(x1, x2, x3, x6)

We have to consider all (P,R,Pi)-chains

(19) PiDPToQDPProof (SOUND transformation)

Transforming (infinitary) constructor rewriting Pi-DP problem [LOPSTR] into ordinary QDP problem [LPAR04] by application of Pi.

(20) Obligation:

Q DP problem:
The TRS P consists of the following rules:

U5_GGAA(X, Y, Xs, >_out_gg) → PART_IN_GGAA(X, Xs)
PART_IN_GGAA(X, .(Y, Xs)) → U5_GGAA(X, Y, Xs, >_in_gg(X, Y))
PART_IN_GGAA(X, .(Y, Xs)) → U7_GGAA(X, Y, Xs, =<_in_gg(X, Y))
U7_GGAA(X, Y, Xs, =<_out_gg) → PART_IN_GGAA(X, Xs)

The TRS R consists of the following rules:

>_in_gg(X0, X1) → >_out_gg
=<_in_gg(X0, X1) → =<_out_gg

The set Q consists of the following terms:

>_in_gg(x0, x1)
=<_in_gg(x0, x1)

We have to consider all (P,Q,R)-chains.

(21) QDPSizeChangeProof (EQUIVALENT transformation)

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.

From the DPs we obtained the following set of size-change graphs:

  • PART_IN_GGAA(X, .(Y, Xs)) → U5_GGAA(X, Y, Xs, >_in_gg(X, Y))
    The graph contains the following edges 1 >= 1, 2 > 2, 2 > 3

  • PART_IN_GGAA(X, .(Y, Xs)) → U7_GGAA(X, Y, Xs, =<_in_gg(X, Y))
    The graph contains the following edges 1 >= 1, 2 > 2, 2 > 3

  • U5_GGAA(X, Y, Xs, >_out_gg) → PART_IN_GGAA(X, Xs)
    The graph contains the following edges 1 >= 1, 3 >= 2

  • U7_GGAA(X, Y, Xs, =<_out_gg) → PART_IN_GGAA(X, Xs)
    The graph contains the following edges 1 >= 1, 3 >= 2

(22) YES

(23) Obligation:

Pi DP problem:
The TRS P consists of the following rules:

U1_GA(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_GA(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
U2_GA(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → QS_IN_GA(Bigs, Bs)
QS_IN_GA(.(X, Xs), Ys) → U1_GA(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
U1_GA(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → QS_IN_GA(Littles, Ls)

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs), Ys) → U1_ga(X, Xs, Ys, part_in_ggaa(X, Xs, Littles, Bigs))
part_in_ggaa(X, .(Y, Xs), .(Y, Ls), Bs) → U5_ggaa(X, Y, Xs, Ls, Bs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg(X0, X1)
U5_ggaa(X, Y, Xs, Ls, Bs, >_out_gg(X, Y)) → U6_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, .(Y, Xs), Ls, .(Y, Bs)) → U7_ggaa(X, Y, Xs, Ls, Bs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg(X0, X1)
U7_ggaa(X, Y, Xs, Ls, Bs, =<_out_gg(X, Y)) → U8_ggaa(X, Y, Xs, Ls, Bs, part_in_ggaa(X, Xs, Ls, Bs))
part_in_ggaa(X, [], [], []) → part_out_ggaa(X, [], [], [])
U8_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), Ls, .(Y, Bs))
U6_ggaa(X, Y, Xs, Ls, Bs, part_out_ggaa(X, Xs, Ls, Bs)) → part_out_ggaa(X, .(Y, Xs), .(Y, Ls), Bs)
U1_ga(X, Xs, Ys, part_out_ggaa(X, Xs, Littles, Bigs)) → U2_ga(X, Xs, Ys, Bigs, qs_in_ga(Littles, Ls))
qs_in_ga([], []) → qs_out_ga([], [])
U2_ga(X, Xs, Ys, Bigs, qs_out_ga(Littles, Ls)) → U3_ga(X, Xs, Ys, Ls, qs_in_ga(Bigs, Bs))
U3_ga(X, Xs, Ys, Ls, qs_out_ga(Bigs, Bs)) → U4_ga(X, Xs, Ys, app_in_gga(Ls, .(X, Bs), Ys))
app_in_gga(.(X, Xs), Ys, .(X, Zs)) → U9_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
app_in_gga([], Ys, Ys) → app_out_gga([], Ys, Ys)
U9_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) → app_out_gga(.(X, Xs), Ys, .(X, Zs))
U4_ga(X, Xs, Ys, app_out_gga(Ls, .(X, Bs), Ys)) → qs_out_ga(.(X, Xs), Ys)

The argument filtering Pi contains the following mapping:
qs_in_ga(x1, x2)  =  qs_in_ga(x1)
.(x1, x2)  =  .(x1, x2)
U1_ga(x1, x2, x3, x4)  =  U1_ga(x1, x4)
part_in_ggaa(x1, x2, x3, x4)  =  part_in_ggaa(x1, x2)
U5_ggaa(x1, x2, x3, x4, x5, x6)  =  U5_ggaa(x1, x2, x3, x6)
>_in_gg(x1, x2)  =  >_in_gg(x1, x2)
>_out_gg(x1, x2)  =  >_out_gg
U6_ggaa(x1, x2, x3, x4, x5, x6)  =  U6_ggaa(x2, x6)
U7_ggaa(x1, x2, x3, x4, x5, x6)  =  U7_ggaa(x1, x2, x3, x6)
=<_in_gg(x1, x2)  =  =<_in_gg(x1, x2)
=<_out_gg(x1, x2)  =  =<_out_gg
U8_ggaa(x1, x2, x3, x4, x5, x6)  =  U8_ggaa(x2, x6)
[]  =  []
part_out_ggaa(x1, x2, x3, x4)  =  part_out_ggaa(x3, x4)
U2_ga(x1, x2, x3, x4, x5)  =  U2_ga(x1, x4, x5)
qs_out_ga(x1, x2)  =  qs_out_ga(x2)
U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x4, x5)
U4_ga(x1, x2, x3, x4)  =  U4_ga(x4)
app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)
U9_gga(x1, x2, x3, x4, x5)  =  U9_gga(x1, x5)
app_out_gga(x1, x2, x3)  =  app_out_gga(x3)
QS_IN_GA(x1, x2)  =  QS_IN_GA(x1)
U1_GA(x1, x2, x3, x4)  =  U1_GA(x1, x4)
U2_GA(x1, x2, x3, x4, x5)  =  U2_GA(x1, x4, x5)

We have to consider all (P,R,Pi)-chains

(24) PiDPToQDPProof (SOUND transformation)

Transforming (infinitary) constructor rewriting Pi-DP problem [LOPSTR] into ordinary QDP problem [LPAR04] by application of Pi.

(25) Obligation:

Q DP problem:
The TRS P consists of the following rules:

U1_GA(X, part_out_ggaa(Littles, Bigs)) → U2_GA(X, Bigs, qs_in_ga(Littles))
U2_GA(X, Bigs, qs_out_ga(Ls)) → QS_IN_GA(Bigs)
QS_IN_GA(.(X, Xs)) → U1_GA(X, part_in_ggaa(X, Xs))
U1_GA(X, part_out_ggaa(Littles, Bigs)) → QS_IN_GA(Littles)

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs)) → U1_ga(X, part_in_ggaa(X, Xs))
part_in_ggaa(X, .(Y, Xs)) → U5_ggaa(X, Y, Xs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg
U5_ggaa(X, Y, Xs, >_out_gg) → U6_ggaa(Y, part_in_ggaa(X, Xs))
part_in_ggaa(X, .(Y, Xs)) → U7_ggaa(X, Y, Xs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg
U7_ggaa(X, Y, Xs, =<_out_gg) → U8_ggaa(Y, part_in_ggaa(X, Xs))
part_in_ggaa(X, []) → part_out_ggaa([], [])
U8_ggaa(Y, part_out_ggaa(Ls, Bs)) → part_out_ggaa(Ls, .(Y, Bs))
U6_ggaa(Y, part_out_ggaa(Ls, Bs)) → part_out_ggaa(.(Y, Ls), Bs)
U1_ga(X, part_out_ggaa(Littles, Bigs)) → U2_ga(X, Bigs, qs_in_ga(Littles))
qs_in_ga([]) → qs_out_ga([])
U2_ga(X, Bigs, qs_out_ga(Ls)) → U3_ga(X, Ls, qs_in_ga(Bigs))
U3_ga(X, Ls, qs_out_ga(Bs)) → U4_ga(app_in_gga(Ls, .(X, Bs)))
app_in_gga(.(X, Xs), Ys) → U9_gga(X, app_in_gga(Xs, Ys))
app_in_gga([], Ys) → app_out_gga(Ys)
U9_gga(X, app_out_gga(Zs)) → app_out_gga(.(X, Zs))
U4_ga(app_out_gga(Ys)) → qs_out_ga(Ys)

The set Q consists of the following terms:

qs_in_ga(x0)
part_in_ggaa(x0, x1)
>_in_gg(x0, x1)
U5_ggaa(x0, x1, x2, x3)
=<_in_gg(x0, x1)
U7_ggaa(x0, x1, x2, x3)
U8_ggaa(x0, x1)
U6_ggaa(x0, x1)
U1_ga(x0, x1)
U2_ga(x0, x1, x2)
U3_ga(x0, x1, x2)
app_in_gga(x0, x1)
U9_gga(x0, x1)
U4_ga(x0)

We have to consider all (P,Q,R)-chains.

(26) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04,JAR06].


The following pairs can be oriented strictly and are deleted.


U1_GA(X, part_out_ggaa(Littles, Bigs)) → U2_GA(X, Bigs, qs_in_ga(Littles))
U1_GA(X, part_out_ggaa(Littles, Bigs)) → QS_IN_GA(Littles)
The remaining pairs can at least be oriented weakly.
Used ordering: Polynomial interpretation [POLO]:

POL(.(x1, x2)) = 1 + x2   
POL(=<_in_gg(x1, x2)) = 1   
POL(=<_out_gg) = 1   
POL(>_in_gg(x1, x2)) = 1   
POL(>_out_gg) = 1   
POL(QS_IN_GA(x1)) = 1 + x1   
POL(U1_GA(x1, x2)) = 1 + x2   
POL(U1_ga(x1, x2)) = 0   
POL(U2_GA(x1, x2, x3)) = 1 + x2   
POL(U2_ga(x1, x2, x3)) = 0   
POL(U3_ga(x1, x2, x3)) = 0   
POL(U4_ga(x1)) = 0   
POL(U5_ggaa(x1, x2, x3, x4)) = 1 + x3 + x4   
POL(U6_ggaa(x1, x2)) = 1 + x2   
POL(U7_ggaa(x1, x2, x3, x4)) = 1 + x3 + x4   
POL(U8_ggaa(x1, x2)) = 1 + x2   
POL(U9_gga(x1, x2)) = 0   
POL([]) = 0   
POL(app_in_gga(x1, x2)) = 0   
POL(app_out_gga(x1)) = 0   
POL(part_in_ggaa(x1, x2)) = 1 + x2   
POL(part_out_ggaa(x1, x2)) = 1 + x1 + x2   
POL(qs_in_ga(x1)) = 0   
POL(qs_out_ga(x1)) = 0   

The following usable rules [FROCOS05] with respect to the argument filtering of the ordering [JAR06] were oriented:

part_in_ggaa(X, .(Y, Xs)) → U5_ggaa(X, Y, Xs, >_in_gg(X, Y))
part_in_ggaa(X, .(Y, Xs)) → U7_ggaa(X, Y, Xs, =<_in_gg(X, Y))
part_in_ggaa(X, []) → part_out_ggaa([], [])
U5_ggaa(X, Y, Xs, >_out_gg) → U6_ggaa(Y, part_in_ggaa(X, Xs))
U6_ggaa(Y, part_out_ggaa(Ls, Bs)) → part_out_ggaa(.(Y, Ls), Bs)
>_in_gg(X0, X1) → >_out_gg
=<_in_gg(X0, X1) → =<_out_gg
U7_ggaa(X, Y, Xs, =<_out_gg) → U8_ggaa(Y, part_in_ggaa(X, Xs))
U8_ggaa(Y, part_out_ggaa(Ls, Bs)) → part_out_ggaa(Ls, .(Y, Bs))

(27) Obligation:

Q DP problem:
The TRS P consists of the following rules:

U2_GA(X, Bigs, qs_out_ga(Ls)) → QS_IN_GA(Bigs)
QS_IN_GA(.(X, Xs)) → U1_GA(X, part_in_ggaa(X, Xs))

The TRS R consists of the following rules:

qs_in_ga(.(X, Xs)) → U1_ga(X, part_in_ggaa(X, Xs))
part_in_ggaa(X, .(Y, Xs)) → U5_ggaa(X, Y, Xs, >_in_gg(X, Y))
>_in_gg(X0, X1) → >_out_gg
U5_ggaa(X, Y, Xs, >_out_gg) → U6_ggaa(Y, part_in_ggaa(X, Xs))
part_in_ggaa(X, .(Y, Xs)) → U7_ggaa(X, Y, Xs, =<_in_gg(X, Y))
=<_in_gg(X0, X1) → =<_out_gg
U7_ggaa(X, Y, Xs, =<_out_gg) → U8_ggaa(Y, part_in_ggaa(X, Xs))
part_in_ggaa(X, []) → part_out_ggaa([], [])
U8_ggaa(Y, part_out_ggaa(Ls, Bs)) → part_out_ggaa(Ls, .(Y, Bs))
U6_ggaa(Y, part_out_ggaa(Ls, Bs)) → part_out_ggaa(.(Y, Ls), Bs)
U1_ga(X, part_out_ggaa(Littles, Bigs)) → U2_ga(X, Bigs, qs_in_ga(Littles))
qs_in_ga([]) → qs_out_ga([])
U2_ga(X, Bigs, qs_out_ga(Ls)) → U3_ga(X, Ls, qs_in_ga(Bigs))
U3_ga(X, Ls, qs_out_ga(Bs)) → U4_ga(app_in_gga(Ls, .(X, Bs)))
app_in_gga(.(X, Xs), Ys) → U9_gga(X, app_in_gga(Xs, Ys))
app_in_gga([], Ys) → app_out_gga(Ys)
U9_gga(X, app_out_gga(Zs)) → app_out_gga(.(X, Zs))
U4_ga(app_out_gga(Ys)) → qs_out_ga(Ys)

The set Q consists of the following terms:

qs_in_ga(x0)
part_in_ggaa(x0, x1)
>_in_gg(x0, x1)
U5_ggaa(x0, x1, x2, x3)
=<_in_gg(x0, x1)
U7_ggaa(x0, x1, x2, x3)
U8_ggaa(x0, x1)
U6_ggaa(x0, x1)
U1_ga(x0, x1)
U2_ga(x0, x1, x2)
U3_ga(x0, x1, x2)
app_in_gga(x0, x1)
U9_gga(x0, x1)
U4_ga(x0)

We have to consider all (P,Q,R)-chains.

(28) DependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 0 SCCs with 2 less nodes.

(29) TRUE