/export/starexec/sandbox2/solver/bin/starexec_run_default /export/starexec/sandbox2/benchmark/theBenchmark.xml /export/starexec/sandbox2/output/output_files


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rm: cannot remove ‘/tmp/muTerm1497983152038664370.in.dec’: No such file or directory
rm: cannot remove ‘/tmp/muTerm1497983152038664370.in.form’: No such file or directory
YES

Problem 1: 

(VAR x y)
(RULES
gcd(0,y) -> y
gcd(s(x),0) -> s(x)
gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
if_gcd(false,x,y) -> gcd(minus(y,x),x)
if_gcd(true,x,y) -> gcd(minus(x,y),y)
le(0,y) -> true
le(s(x),0) -> false
le(s(x),s(y)) -> le(x,y)
minus(0,x) -> 0
minus(s(x),s(y)) -> minus(x,y)
minus(x,0) -> x
)

Problem 1: 

Innermost Equivalent Processor:
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
-> The term rewriting system is non-overlaping or locally confluent overlay system. Therefore, innermost termination implies termination.
 

Problem 1: 

Dependency Pairs Processor:
-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 GCD(s(x),s(y)) -> LE(y,x)
 IF_GCD(false,x,y) -> GCD(minus(y,x),x)
 IF_GCD(false,x,y) -> MINUS(y,x)
 IF_GCD(true,x,y) -> GCD(minus(x,y),y)
 IF_GCD(true,x,y) -> MINUS(x,y)
 LE(s(x),s(y)) -> LE(x,y)
 MINUS(s(x),s(y)) -> MINUS(x,y)
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x

Problem 1: 

SCC Processor:
-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 GCD(s(x),s(y)) -> LE(y,x)
 IF_GCD(false,x,y) -> GCD(minus(y,x),x)
 IF_GCD(false,x,y) -> MINUS(y,x)
 IF_GCD(true,x,y) -> GCD(minus(x,y),y)
 IF_GCD(true,x,y) -> MINUS(x,y)
 LE(s(x),s(y)) -> LE(x,y)
 MINUS(s(x),s(y)) -> MINUS(x,y)
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
->->Cycle:
->->-> Pairs:
 MINUS(s(x),s(y)) -> MINUS(x,y)
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->->Cycle:
->->-> Pairs:
 LE(s(x),s(y)) -> LE(x,y)
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->->Cycle:
->->-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 IF_GCD(false,x,y) -> GCD(minus(y,x),x)
 IF_GCD(true,x,y) -> GCD(minus(x,y),y)
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x


The problem is decomposed in 3 subproblems.

Problem 1.1: 

Subterm Processor:
-> Pairs:
 MINUS(s(x),s(y)) -> MINUS(x,y)
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Projection:
 pi(MINUS) = 1

Problem 1.1: 

SCC Processor:
-> Pairs:
 Empty
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
 There is no strongly connected component

The problem is finite.

Problem 1.2: 

Subterm Processor:
-> Pairs:
 LE(s(x),s(y)) -> LE(x,y)
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Projection:
 pi(LE) = 1

Problem 1.2: 

SCC Processor:
-> Pairs:
 Empty
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
 There is no strongly connected component

The problem is finite.

Problem 1.3: 

Instantiation Processor:
-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 IF_GCD(false,x,y) -> GCD(minus(y,x),x)
 IF_GCD(true,x,y) -> GCD(minus(x,y),y)
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Instantiated Pairs:
->->Original Pair:
 IF_GCD(false,x,y) -> GCD(minus(y,x),x)
->-> Instantiated pairs:
 IF_GCD(false,s(x3),s(x4)) -> GCD(minus(s(x4),s(x3)),s(x3))
->->Original Pair:
 IF_GCD(true,x,y) -> GCD(minus(x,y),y)
->-> Instantiated pairs:
 IF_GCD(true,s(x3),s(x4)) -> GCD(minus(s(x3),s(x4)),s(x4))

Problem 1.3: 

SCC Processor:
-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 IF_GCD(false,s(x3),s(x4)) -> GCD(minus(s(x4),s(x3)),s(x3))
 IF_GCD(true,s(x3),s(x4)) -> GCD(minus(s(x3),s(x4)),s(x4))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
->->Cycle:
->->-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 IF_GCD(false,s(x3),s(x4)) -> GCD(minus(s(x4),s(x3)),s(x3))
 IF_GCD(true,s(x3),s(x4)) -> GCD(minus(s(x3),s(x4)),s(x4))
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x

Problem 1.3: 

Narrowing Processor:
-> Pairs:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
 IF_GCD(false,s(x3),s(x4)) -> GCD(minus(s(x4),s(x3)),s(x3))
 IF_GCD(true,s(x3),s(x4)) -> GCD(minus(s(x3),s(x4)),s(x4))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Narrowed Pairs:
->->Original Pair:
 GCD(s(x),s(y)) -> IF_GCD(le(y,x),s(x),s(y))
->-> Narrowed pairs:
 GCD(s(0),s(s(x))) -> IF_GCD(false,s(0),s(s(x)))
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
->->Original Pair:
 IF_GCD(false,s(x3),s(x4)) -> GCD(minus(s(x4),s(x3)),s(x3))
->-> Narrowed pairs:
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
->->Original Pair:
 IF_GCD(true,s(x3),s(x4)) -> GCD(minus(s(x3),s(x4)),s(x4))
->-> Narrowed pairs:
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))

Problem 1.3: 

SCC Processor:
-> Pairs:
 GCD(s(0),s(s(x))) -> IF_GCD(false,s(0),s(s(x)))
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
->->Cycle:
->->-> Pairs:
 GCD(s(0),s(s(x))) -> IF_GCD(false,s(0),s(s(x)))
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x

Problem 1.3: 

Reduction Pairs Processor:
-> Pairs:
 GCD(s(0),s(s(x))) -> IF_GCD(false,s(0),s(s(x)))
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
-> Usable rules:
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Interpretation type:
 Linear
->Coefficients:
 Natural Numbers
->Dimension:
 1
->Bound:
 2
->Interpretation:
 
[le](X1,X2) = X1 + 2.X2
[minus](X1,X2) = 2.X1
[0] = 2
[false] = 2
[s](X) = 2.X + 1
[true] = 1
[GCD](X1,X2) = 2.X1 + 2.X2 + 2
[IF_GCD](X1,X2,X3) = 2.X2 + 2.X3

Problem 1.3: 

SCC Processor:
-> Pairs:
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
->->Cycle:
->->-> Pairs:
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x

Problem 1.3: 

Reduction Pairs Processor:
-> Pairs:
 GCD(s(s(y)),s(s(x))) -> IF_GCD(le(x,y),s(s(y)),s(s(x)))
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
-> Usable rules:
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Interpretation type:
 Linear
->Coefficients:
 Natural Numbers
->Dimension:
 1
->Bound:
 2
->Interpretation:
 
[le](X1,X2) = 0
[minus](X1,X2) = X1 + 1
[0] = 1
[false] = 0
[s](X) = 2.X + 2
[true] = 0
[GCD](X1,X2) = 2.X1 + X2 + 2
[IF_GCD](X1,X2,X3) = 2.X1 + 2.X2 + X3 + 1

Problem 1.3: 

SCC Processor:
-> Pairs:
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(false,s(y),s(x)) -> GCD(minus(x,y),s(y))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
->->Cycle:
->->-> Pairs:
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
->->-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x

Problem 1.3: 

Reduction Pairs Processor:
-> Pairs:
 GCD(s(y),s(0)) -> IF_GCD(true,s(y),s(0))
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
-> Usable rules:
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Interpretation type:
 Linear
->Coefficients:
 Natural Numbers
->Dimension:
 1
->Bound:
 2
->Interpretation:
 
[minus](X1,X2) = 2.X1 + 1
[0] = 2
[s](X) = 2.X + 2
[true] = 2
[GCD](X1,X2) = 2.X1 + 2.X2 + 2
[IF_GCD](X1,X2,X3) = 2.X2 + 2.X3 + 1

Problem 1.3: 

SCC Processor:
-> Pairs:
 IF_GCD(true,s(x),s(y)) -> GCD(minus(x,y),s(y))
-> Rules:
 gcd(0,y) -> y
 gcd(s(x),0) -> s(x)
 gcd(s(x),s(y)) -> if_gcd(le(y,x),s(x),s(y))
 if_gcd(false,x,y) -> gcd(minus(y,x),x)
 if_gcd(true,x,y) -> gcd(minus(x,y),y)
 le(0,y) -> true
 le(s(x),0) -> false
 le(s(x),s(y)) -> le(x,y)
 minus(0,x) -> 0
 minus(s(x),s(y)) -> minus(x,y)
 minus(x,0) -> x
->Strongly Connected Components:
 There is no strongly connected component

The problem is finite.