(0) Obligation:
Clauses:
q(X) :- ','(not_zero(X), ','(p(X, Y), q(Y))).
p(0, 0).
p(s(X), X).
zero(0).
not_zero(X) :- ','(zero(X), ','(!, failure(a))).
not_zero(X1).
failure(b).
Query: q(g)
(1) PrologDeterminacyProcessorProof (EQUIVALENT transformation)
The root node satisfies the determinacy criterion.
(2) YES