Term Rewriting System R:
[x, y, z]
f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x))
g(0, 1) -> 0
g(0, 1) -> 1
h(g(x, y)) -> h(x)
Termination of R to be shown.
R
↳Dependency Pair Analysis
R contains the following Dependency Pairs:
F(0, 1, g(x, y), z) -> F(g(x, y), g(x, y), g(x, y), h(x))
F(0, 1, g(x, y), z) -> H(x)
H(g(x, y)) -> H(x)
Furthermore, R contains two SCCs.
R
↳DPs
→DP Problem 1
↳Size-Change Principle
→DP Problem 2
↳NonTerm
Dependency Pair:
H(g(x, y)) -> H(x)
Rules:
f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x))
g(0, 1) -> 0
g(0, 1) -> 1
h(g(x, y)) -> h(x)
We number the DPs as follows:
- H(g(x, y)) -> H(x)
and get the following Size-Change Graph(s):
which lead(s) to this/these maximal multigraph(s):
DP: empty set
Oriented Rules: none
We used the order Homeomorphic Embedding Order with Non-Strict Precedence.
trivial
with Argument Filtering System:
g(x1, x2) -> g(x1, x2)
We obtain no new DP problems.
R
↳DPs
→DP Problem 1
↳SCP
→DP Problem 2
↳Non Termination
Dependency Pair:
F(0, 1, g(x, y), z) -> F(g(x, y), g(x, y), g(x, y), h(x))
Rules:
f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x))
g(0, 1) -> 0
g(0, 1) -> 1
h(g(x, y)) -> h(x)
Found an infinite P-chain over R:
P =
F(0, 1, g(x, y), z) -> F(g(x, y), g(x, y), g(x, y), h(x))
R =
f(0, 1, g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x))
g(0, 1) -> 0
g(0, 1) -> 1
h(g(x, y)) -> h(x)
s = F(g(0, 1), g(0, 1), g(0, 1), h(0))
evaluates to t =F(g(0, 1), g(0, 1), g(0, 1), h(0))
Thus, s starts an infinite chain.
Non-Termination of R could be shown.
Duration:
0:01 minutes