Termination w.r.t. Q of the following Term Rewriting System could be proven:
Q restricted rewrite system:
The TRS R consists of the following rules:
fib1(0) -> 0
fib1(s1(0)) -> s1(0)
fib1(s1(s1(x))) -> +2(fib1(s1(x)), fib1(x))
Q is empty.
↳ QTRS
↳ DependencyPairsProof
Q restricted rewrite system:
The TRS R consists of the following rules:
fib1(0) -> 0
fib1(s1(0)) -> s1(0)
fib1(s1(s1(x))) -> +2(fib1(s1(x)), fib1(x))
Q is empty.
Using Dependency Pairs [1,13] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:
FIB1(s1(s1(x))) -> FIB1(s1(x))
FIB1(s1(s1(x))) -> FIB1(x)
The TRS R consists of the following rules:
fib1(0) -> 0
fib1(s1(0)) -> s1(0)
fib1(s1(s1(x))) -> +2(fib1(s1(x)), fib1(x))
Q is empty.
We have to consider all minimal (P,Q,R)-chains.
↳ QTRS
↳ DependencyPairsProof
↳ QDP
↳ QDPOrderProof
Q DP problem:
The TRS P consists of the following rules:
FIB1(s1(s1(x))) -> FIB1(s1(x))
FIB1(s1(s1(x))) -> FIB1(x)
The TRS R consists of the following rules:
fib1(0) -> 0
fib1(s1(0)) -> s1(0)
fib1(s1(s1(x))) -> +2(fib1(s1(x)), fib1(x))
Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].
The following pairs can be oriented strictly and are deleted.
FIB1(s1(s1(x))) -> FIB1(s1(x))
FIB1(s1(s1(x))) -> FIB1(x)
The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial interpretation [21]:
POL(FIB1(x1)) = x1
POL(s1(x1)) = 3 + 3·x1
The following usable rules [14] were oriented:
none
↳ QTRS
↳ DependencyPairsProof
↳ QDP
↳ QDPOrderProof
↳ QDP
↳ PisEmptyProof
Q DP problem:
P is empty.
The TRS R consists of the following rules:
fib1(0) -> 0
fib1(s1(0)) -> s1(0)
fib1(s1(s1(x))) -> +2(fib1(s1(x)), fib1(x))
Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The TRS P is empty. Hence, there is no (P,Q,R) chain.