0.05/0.11 % Problem : theBenchmark.p : TPTP v0.0.0. Released v0.0.0. 0.05/0.11 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof 0.11/0.32 % Computer : n021.cluster.edu 0.11/0.32 % Model : x86_64 x86_64 0.11/0.32 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 0.11/0.32 % Memory : 8042.1875MB 0.11/0.32 % OS : Linux 3.10.0-693.el7.x86_64 0.11/0.32 % CPULimit : 960 0.11/0.32 % WCLimit : 120 0.11/0.32 % DateTime : Tue Aug 9 01:58:05 EDT 2022 0.11/0.32 % CPUTime : 0.11/0.34 % SZS status Unsatisfiable 0.11/0.34 0.11/0.34 % SZS output start Proof 0.11/0.34 Axiom 1 (m_definition): apply(X, X) = apply(m, X). 0.11/0.34 Axiom 2 (b_definition): apply(X, apply(Y, Z)) = apply(apply(apply(b, X), Y), Z). 0.11/0.34 0.11/0.34 Goal 1 (prove_fixed_point): X = apply(combinator, X). 0.11/0.34 The goal is true when: 0.11/0.34 X = apply(m, apply(apply(b, combinator), m)) 0.11/0.34 0.11/0.34 Proof: 0.11/0.34 apply(m, apply(apply(b, combinator), m)) 0.11/0.34 = { by axiom 1 (m_definition) R->L } 0.11/0.34 apply(apply(apply(b, combinator), m), apply(apply(b, combinator), m)) 0.11/0.34 = { by axiom 2 (b_definition) R->L } 0.11/0.34 apply(combinator, apply(m, apply(apply(b, combinator), m))) 0.11/0.34 % SZS output end Proof 0.11/0.34 0.11/0.34 RESULT: Unsatisfiable (the axioms are contradictory). 0.11/0.34 EOF