Termination Proof Script
Consider the TRS R consisting of the rewrite rules
|
| 1: |
|
sum(0) |
→ 0 |
| 2: |
|
sum(s(x)) |
→ sqr(s(x)) + sum(x) |
| 3: |
|
sqr(x) |
→ x * x |
| 4: |
|
sum(s(x)) |
→ (s(x) * s(x)) + sum(x) |
|
There are 2 dependency pairs:
|
| 5: |
|
SUM(s(x)) |
→ SQR(s(x)) |
| 6: |
|
SUM(s(x)) |
→ SUM(x) |
|
The approximated dependency graph contains one SCC:
{6}.
-
Consider the SCC {6}.
There are no usable rules.
By taking the AF π with
π(SUM) = 1 together with
the lexicographic path order with
empty precedence,
rule 6
is strictly decreasing.
Hence the TRS is terminating.
Tyrolean Termination Tool (0.01 seconds)
--- May 4, 2006