Termination of the following Term Rewriting System could be proven:

Context-sensitive rewrite system:
The TRS R consists of the following rules:

f(a, b, X) → f(X, X, X)
ca
cb

The replacement map contains the following entries:

f: {3}
a: empty set
b: empty set
c: empty set


CSR
  ↳ CSDependencyPairsProof

Context-sensitive rewrite system:
The TRS R consists of the following rules:

f(a, b, X) → f(X, X, X)
ca
cb

The replacement map contains the following entries:

f: {3}
a: empty set
b: empty set
c: empty set

Using Improved CS-DPs we result in the following initial Q-CSDP problem.

↳ CSR
  ↳ CSDependencyPairsProof
QCSDP
      ↳ QCSDependencyGraphProof

Q-restricted context-sensitive dependency pair problem:
For all symbols f in {f, F} we have µ(f) = {3}.

The ordinary context-sensitive dependency pairs DPo are:

F(a, b, X) → F(X, X, X)

The TRS R consists of the following rules:

f(a, b, X) → f(X, X, X)
ca
cb

Q is empty.

The approximation of the Context-Sensitive Dependency Graph contains 0 SCCs.
The rules F(a, b, z0) → F(z0, z0, z0) and F(a, b, x0) → F(x0, x0, x0) form no chain, because ECapµ(F(z0, z0, z0)) = F(z0, z0, x_1) does not unify with F(a, b, x0).