Certification Problem
Input (TPDB TRS_Standard/Strategy_removed_CSR_05/Ex4_7_15_Bor03)
The rewrite relation of the following TRS is considered.
|
f(0) |
→ |
cons(0,f(s(0))) |
(1) |
|
f(s(0)) |
→ |
f(p(s(0))) |
(2) |
|
p(s(0)) |
→ |
0 |
(3) |
Property / Task
Prove or disprove termination.Answer / Result
No.Proof (by ttt2 @ termCOMP 2023)
1 Loop
The following loop proves nontermination.
| t0
|
= |
f(0) |
|
→
|
cons(0,f(s(0))) |
|
→
|
cons(0,f(p(s(0)))) |
|
→
|
cons(0,f(0)) |
|
= |
t3
|
where t3 =
C[t0]
and
C = cons(0,☐)