0.08/0.13 % Problem : theBenchmark.p : TPTP v0.0.0. Released v0.0.0. 0.08/0.13 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof 0.13/0.35 % Computer : n022.cluster.edu 0.13/0.35 % Model : x86_64 x86_64 0.13/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 0.13/0.35 % Memory : 8042.1875MB 0.13/0.35 % OS : Linux 3.10.0-693.el7.x86_64 0.13/0.35 % CPULimit : 960 0.13/0.35 % WCLimit : 120 0.13/0.35 % DateTime : Tue Aug 9 02:20:46 EDT 2022 0.13/0.35 % CPUTime : 0.13/0.40 % SZS status Unsatisfiable 0.13/0.40 0.13/0.40 % SZS output start Proof 0.13/0.40 Axiom 1 (m_definition): apply(X, X) = apply(m, X). 0.13/0.40 Axiom 2 (b_definition): apply(apply(apply(b, X), Y), Z) = apply(X, apply(Y, Z)). 0.13/0.40 0.13/0.40 Goal 1 (prove_fixed_point): apply(combinator, X) = X. 0.13/0.40 The goal is true when: 0.13/0.40 X = apply(m, apply(apply(b, combinator), m)) 0.13/0.40 0.13/0.40 Proof: 0.13/0.40 apply(combinator, apply(m, apply(apply(b, combinator), m))) 0.13/0.40 = { by axiom 2 (b_definition) R->L } 0.13/0.40 apply(apply(apply(b, combinator), m), apply(apply(b, combinator), m)) 0.13/0.40 = { by axiom 1 (m_definition) } 0.13/0.40 apply(m, apply(apply(b, combinator), m)) 0.13/0.40 % SZS output end Proof 0.13/0.40 0.13/0.40 RESULT: Unsatisfiable (the axioms are contradictory). 0.13/0.40 EOF