Logic Programming pair #487096452

details

property	value
status	complete
benchmark	frontier-bf.pl
ran by	Akihisa Yamada
cpu timeout	1200 seconds
wallclock timeout	300 seconds
memory limit	137438953472 bytes
execution host	n151.star.cs.uiowa.edu
space	BCGGV05

run statistics

property	value
solver	AProVE
configuration	standard
runtime (wallclock)	2.03414 seconds
cpu usage	4.75673
user time	4.53138
system time	0.225348
max virtual memory	1.8679196E7
max residence set size	402456.0

stage attributes

key	value
starexec-result	YES

output

YES
proof of /export/starexec/sandbox2/benchmark/theBenchmark.pl
# AProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty


Left Termination of the query pattern

front(g,a)

w.r.t. the given Prolog program could successfully be proven:

(0) Prolog
(1) PrologToPiTRSProof [SOUND, 0 ms]
(2) PiTRS
(3) DependencyPairsProof [EQUIVALENT, 10 ms]
(4) PiDP
(5) DependencyGraphProof [EQUIVALENT, 0 ms]
(6) AND
    (7) PiDP
        (8) UsableRulesProof [EQUIVALENT, 0 ms]
        (9) PiDP
        (10) PiDPToQDPProof [SOUND, 0 ms]
        (11) QDP
        (12) QDPSizeChangeProof [EQUIVALENT, 0 ms]
        (13) YES
    (14) PiDP
        (15) PiDPToQDPProof [SOUND, 0 ms]
        (16) QDP
        (17) QDPSizeChangeProof [EQUIVALENT, 0 ms]
        (18) YES


----------------------------------------

(0)
Obligation:
Clauses:

front(void, []).
front(tree(X, void, void), .(X, [])).
front(tree(X1, L, R), Xs) :- ','(front(L, Ls), ','(front(R, Rs), app(Ls, Rs, Xs))).
app([], X, X).
app(.(X, Xs), Ys, .(X, Zs)) :- app(Xs, Ys, Zs).


Query: front(g,a)
----------------------------------------

(1) PrologToPiTRSProof (SOUND)
We use the technique of [TOCL09]. With regard to the inferred argument filtering the predicates were used in the following modes:

front_in_2: (b,f)

app_in_3: (b,b,f)

Transforming Prolog into the following Term Rewriting System:

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

   front_in_ga(void, []) -> front_out_ga(void, [])
   front_in_ga(tree(X, void, void), .(X, [])) -> front_out_ga(tree(X, void, void), .(X, []))
   front_in_ga(tree(X1, L, R), Xs) -> U1_ga(X1, L, R, Xs, front_in_ga(L, Ls))
   U1_ga(X1, L, R, Xs, front_out_ga(L, Ls)) -> U2_ga(X1, L, R, Xs, Ls, front_in_ga(R, Rs))
   U2_ga(X1, L, R, Xs, Ls, front_out_ga(R, Rs)) -> U3_ga(X1, L, R, Xs, app_in_gga(Ls, Rs, Xs))
   app_in_gga([], X, X) -> app_out_gga([], X, X)
   app_in_gga(.(X, Xs), Ys, .(X, Zs)) -> U4_gga(X, Xs, Ys, Zs, app_in_gga(Xs, Ys, Zs))
   U4_gga(X, Xs, Ys, Zs, app_out_gga(Xs, Ys, Zs)) -> app_out_gga(.(X, Xs), Ys, .(X, Zs))
   U3_ga(X1, L, R, Xs, app_out_gga(Ls, Rs, Xs)) -> front_out_ga(tree(X1, L, R), Xs)

The argument filtering Pi contains the following mapping:
front_in_ga(x1, x2)  =  front_in_ga(x1)

void  =  void

front_out_ga(x1, x2)  =  front_out_ga(x1, x2)

tree(x1, x2, x3)  =  tree(x1, x2, x3)

U1_ga(x1, x2, x3, x4, x5)  =  U1_ga(x1, x2, x3, x5)

U2_ga(x1, x2, x3, x4, x5, x6)  =  U2_ga(x1, x2, x3, x5, x6)

U3_ga(x1, x2, x3, x4, x5)  =  U3_ga(x1, x2, x3, x5)

app_in_gga(x1, x2, x3)  =  app_in_gga(x1, x2)

[]  =  []

app_out_gga(x1, x2, x3)  =  app_out_gga(x1, x2, x3)

.(x1, x2)  =  .(x1, x2)

U4_gga(x1, x2, x3, x4, x5)  =  U4_gga(x1, x2, x3, x5)





Infinitary Constructor Rewriting Termination of PiTRS implies Termination of Prolog

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