%---------------- SGGS v1.0 (IJCAR 2020 submission) ----------------%

------ Parsing...successful


------ Proving...
use I-
not ground preserving

Gamma_0: (extend-no-conflict)
  0: [big_f(X0)]

Gamma_1: (extend-conflict)
  0: [big_f(X0)]
  1: [~(big_f(f(X0)))]

Gamma_2: (move)
  0: [~(big_f(f(X0)))]
  1: [big_f(X0)]

Gamma_3: (right-split)
  0: [~(big_f(f(X0)))]
  1: [big_f(f(X0))]
  2: top(X0) != f | [big_f(X0)]

Gamma_4: (right-split)
  0: [~(big_f(f(X0)))]
  1: [big_f(f(X0))]
  2: top(X0) != f | [big_f(X0)]

Gamma_5: (resolve)
  0: [~(big_f(f(X0)))]
  1: []
  2: top(X0) != f | [big_f(X0)]

SZS status Unsatisfiable