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

------ Parsing...successful


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

Gamma_0: (extend-no-conflict)
  0: [element(X0,X0)], element(X0,a)

Gamma_1: (extend-conflict)
  0: [element(X0,X0)], element(X0,a)
  1: [~(element(a,a))]

Gamma_2: (move)
  0: [~(element(a,a))]
  1: [element(X0,X0)], element(X0,a)

Gamma_3: (right-split)
  0: [~(element(a,a))]
  1: top(X0) != a | [element(a,a)]
  2: top(X0) != a & top(X0) != a | [element(X0,X0)], element(X0,a)

Gamma_4: (right-split)
  0: [~(element(a,a))]
  1: [element(a,a)]
  2: top(X0) != a & top(X0) != a | [element(X0,X0)], element(X0,a)

Gamma_5: (resolve)
  0: [~(element(a,a))]
  1: []
  2: top(X0) != a & top(X0) != a | [element(X0,X0)], element(X0,a)

SZS status Unsatisfiable