0.07/0.12 % Problem : theBenchmark.p : TPTP v0.0.0. Released v0.0.0. 0.07/0.13 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof 0.13/0.32 % Computer : n029.cluster.edu 0.13/0.32 % Model : x86_64 x86_64 0.13/0.32 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 0.13/0.32 % Memory : 8042.1875MB 0.13/0.32 % OS : Linux 3.10.0-693.el7.x86_64 0.13/0.32 % CPULimit : 960 0.13/0.32 % WCLimit : 120 0.13/0.32 % DateTime : Tue Aug 9 02:57:39 EDT 2022 0.13/0.32 % CPUTime : 0.13/0.36 % SZS status Unsatisfiable 0.13/0.36 0.13/0.36 % SZS output start Proof 0.13/0.36 Axiom 1 (m_definition): apply(m, X) = apply(X, X). 0.13/0.36 Axiom 2 (b_definition): apply(X, apply(Y, Z)) = apply(apply(apply(b, X), Y), Z). 0.13/0.36 0.13/0.36 Goal 1 (prove_fixed_point): X = apply(combinator, X). 0.13/0.36 The goal is true when: 0.13/0.36 X = apply(m, apply(apply(b, combinator), m)) 0.13/0.36 0.13/0.36 Proof: 0.13/0.36 apply(m, apply(apply(b, combinator), m)) 0.13/0.36 = { by axiom 1 (m_definition) } 0.13/0.36 apply(apply(apply(b, combinator), m), apply(apply(b, combinator), m)) 0.13/0.36 = { by axiom 2 (b_definition) R->L } 0.13/0.36 apply(combinator, apply(m, apply(apply(b, combinator), m))) 0.13/0.36 % SZS output end Proof 0.13/0.36 0.13/0.36 RESULT: Unsatisfiable (the axioms are contradictory). 0.13/0.36 EOF