0.07/0.12 % Problem : theBenchmark.p : TPTP v0.0.0. Released v0.0.0. 0.07/0.12 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof 0.12/0.33 % Computer : n002.cluster.edu 0.12/0.33 % Model : x86_64 x86_64 0.12/0.33 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 0.12/0.33 % Memory : 8042.1875MB 0.12/0.33 % OS : Linux 3.10.0-693.el7.x86_64 0.12/0.33 % CPULimit : 1440 0.12/0.33 % WCLimit : 180 0.12/0.33 % DateTime : Mon Jul 3 06:40:22 EDT 2023 0.12/0.33 % CPUTime : 83.41/10.93 % SZS status Unsatisfiable 83.41/10.93 83.41/10.96 % SZS output start Proof 83.41/10.96 Axiom 1 (t_definition): apply(X, Y) = apply(apply(t, Y), X). 83.41/10.96 Axiom 2 (b_definition): apply(X, apply(Y, Z)) = apply(apply(apply(b, X), Y), Z). 83.41/10.96 83.41/10.96 Goal 1 (prove_g_combinator): apply(apply(f(X), i(X)), apply(g(X), h(X))) = apply(apply(apply(apply(X, f(X)), g(X)), h(X)), i(X)). 83.41/10.96 The goal is true when: 83.41/10.96 X = apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))) 83.41/10.96 83.41/10.96 Proof: 83.41/10.96 apply(apply(f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))) 83.41/10.96 = { by axiom 1 (t_definition) } 83.41/10.96 apply(apply(t, apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), apply(f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(b, apply(t, apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))))), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(apply(apply(b, b), t), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 1 (t_definition) } 83.41/10.96 apply(apply(apply(t, f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), apply(apply(apply(b, b), t), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(apply(b, apply(t, f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), apply(apply(b, b), t)), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(apply(apply(apply(b, b), t), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), apply(apply(b, b), t)), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 1 (t_definition) } 83.41/10.96 apply(apply(apply(apply(t, apply(apply(b, b), t)), apply(apply(apply(b, b), t), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), apply(g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(apply(b, apply(apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t)))))), g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 = { by axiom 2 (b_definition) } 83.41/10.96 apply(apply(apply(apply(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))), f(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), g(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), h(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))), i(apply(apply(b, b), apply(apply(b, apply(t, apply(apply(b, b), t))), apply(apply(b, b), t))))) 83.41/10.96 % SZS output end Proof 83.41/10.96 83.41/10.96 RESULT: Unsatisfiable (the axioms are contradictory). 83.41/10.99 EOF