Logic Programming pair #487529281

details

property	value
status	complete
benchmark	samefringe.pl
ran by	Akihisa Yamada
cpu timeout	1200 seconds
wallclock timeout	300 seconds
memory limit	137438953472 bytes
execution host	n139.star.cs.uiowa.edu
space	SGST06

run statistics

property	value
solver	AProVE
configuration	standard
runtime (wallclock)	2.19404888153 seconds
cpu usage	5.390486174
max memory	5.15629056E8

stage attributes

key	value
output-size	19754
starexec-result	YES

output

/export/starexec/sandbox2/solver/bin/starexec_run_standard /export/starexec/sandbox2/benchmark/theBenchmark.pl /export/starexec/sandbox2/output/output_files


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


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# AProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty


Left Termination of the query pattern

samefringe(g,g)

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

(0) Prolog
(1) PrologToPiTRSProof [SOUND, 0 ms]
(2) PiTRS
(3) DependencyPairsProof [EQUIVALENT, 16 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) MRRProof [EQUIVALENT, 3 ms]
        (13) QDP
        (14) PisEmptyProof [EQUIVALENT, 0 ms]
        (15) YES
    (16) PiDP
        (17) UsableRulesProof [EQUIVALENT, 0 ms]
        (18) PiDP
        (19) PiDPToQDPProof [SOUND, 3 ms]
        (20) QDP
        (21) MRRProof [EQUIVALENT, 22 ms]
        (22) QDP
        (23) PisEmptyProof [EQUIVALENT, 0 ms]
        (24) YES


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

(0)
Obligation:
Clauses:

gopher(nil, nil).
gopher(cons(nil, Y), cons(nil, Y)).
gopher(cons(cons(U, V), W), X) :- gopher(cons(U, cons(V, W)), X).
samefringe(nil, nil).
samefringe(cons(U, V), cons(X, Y)) :- ','(gopher(cons(U, V), cons(U1, V1)), ','(gopher(cons(X, Y), cons(X1, Y1)), samefringe(V1, Y1))).


Query: samefringe(g,g)
----------------------------------------

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

samefringe_in_2: (b,b)

gopher_in_2: (b,f)

Transforming Prolog into the following Term Rewriting System:

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

   samefringe_in_gg(nil, nil) -> samefringe_out_gg(nil, nil)
   samefringe_in_gg(cons(U, V), cons(X, Y)) -> U2_gg(U, V, X, Y, gopher_in_ga(cons(U, V), cons(U1, V1)))
   gopher_in_ga(nil, nil) -> gopher_out_ga(nil, nil)
   gopher_in_ga(cons(nil, Y), cons(nil, Y)) -> gopher_out_ga(cons(nil, Y), cons(nil, Y))
   gopher_in_ga(cons(cons(U, V), W), X) -> U1_ga(U, V, W, X, gopher_in_ga(cons(U, cons(V, W)), X))
   U1_ga(U, V, W, X, gopher_out_ga(cons(U, cons(V, W)), X)) -> gopher_out_ga(cons(cons(U, V), W), X)
   U2_gg(U, V, X, Y, gopher_out_ga(cons(U, V), cons(U1, V1))) -> U3_gg(U, V, X, Y, U1, V1, gopher_in_ga(cons(X, Y), cons(X1, Y1)))
   U3_gg(U, V, X, Y, U1, V1, gopher_out_ga(cons(X, Y), cons(X1, Y1))) -> U4_gg(U, V, X, Y, samefringe_in_gg(V1, Y1))
   U4_gg(U, V, X, Y, samefringe_out_gg(V1, Y1)) -> samefringe_out_gg(cons(U, V), cons(X, Y))

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

nil  =  nil

samefringe_out_gg(x1, x2)  =  samefringe_out_gg

cons(x1, x2)  =  cons(x1, x2)

U2_gg(x1, x2, x3, x4, x5)  =  U2_gg(x3, x4, x5)

gopher_in_ga(x1, x2)  =  gopher_in_ga(x1)

gopher_out_ga(x1, x2)  =  gopher_out_ga(x2)

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

U3_gg(x1, x2, x3, x4, x5, x6, x7)  =  U3_gg(x6, x7)

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