Certification Problem

Input (TPDB TRS_Standard/SK90/2.30)

The rewrite relation of the following TRS is considered.

not(x) xor(x,true) (1)
implies(x,y) xor(and(x,y),xor(x,true)) (2)
or(x,y) xor(and(x,y),xor(x,y)) (3)
=(x,y) xor(x,xor(y,true)) (4)

Property / Task

Prove or disprove termination.

Answer / Result

Yes.

Proof (by NaTT @ termCOMP 2023)

1 Dependency Pair Transformation

The set of initial dependency pairs is empty, and hence the TRS is terminating.