(0) Obligation:
Q restricted rewrite system:
The TRS R consists of the following rules:
f(a, b) → f(a, c)
f(c, d) → f(b, d)
Q is empty.
(1) AAECC Innermost (EQUIVALENT transformation)
We have applied [NOC,AAECCNOC] to switch to innermost. The TRS R 1 is none
The TRS R 2 is
f(a, b) → f(a, c)
f(c, d) → f(b, d)
The signature Sigma is {
f}
(2) Obligation:
Q restricted rewrite system:
The TRS R consists of the following rules:
f(a, b) → f(a, c)
f(c, d) → f(b, d)
The set Q consists of the following terms:
f(a, b)
f(c, d)
(3) DependencyPairsProof (EQUIVALENT transformation)
Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem.
(4) Obligation:
Q DP problem:
The TRS P consists of the following rules:
F(a, b) → F(a, c)
F(c, d) → F(b, d)
The TRS R consists of the following rules:
f(a, b) → f(a, c)
f(c, d) → f(b, d)
The set Q consists of the following terms:
f(a, b)
f(c, d)
We have to consider all minimal (P,Q,R)-chains.
(5) DependencyGraphProof (EQUIVALENT transformation)
The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 0 SCCs with 2 less nodes.
(6) TRUE