Certification Problem
Input (TPDB TRS_Standard/SK90/2.28)
The rewrite relation of the following TRS is considered.
|
dfib(s(s(x)),y) |
→ |
dfib(s(x),dfib(x,y)) |
(1) |
Property / Task
Prove or disprove termination.Answer / Result
Yes.Proof (by AProVE @ termCOMP 2023)
1 Rule Removal
Using the
linear polynomial interpretation over the naturals
| [dfib(x1, x2)] |
= |
1 + 2 · x1 + 1 · x2
|
| [s(x1)] |
= |
2 + 2 · x1
|
all of the following rules can be deleted.
|
dfib(s(s(x)),y) |
→ |
dfib(s(x),dfib(x,y)) |
(1) |
1.1 R is empty
There are no rules in the TRS. Hence, it is terminating.