TSTP Solution File: BOO009-4 by Twee---2.4.2
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% File : Twee---2.4.2
% Problem : BOO009-4 : TPTP v8.1.2. Released v1.1.0.
% Transfm : none
% Format : tptp:raw
% Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% Computer : n025.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8042.1875MB
% OS : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Wed Aug 30 18:11:20 EDT 2023
% Result : Unsatisfiable 0.20s 0.40s
% Output : Proof 0.20s
% Verified :
% SZS Type : -
% Comments :
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%----WARNING: Could not form TPTP format derivation
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%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.13 % Problem : BOO009-4 : TPTP v8.1.2. Released v1.1.0.
% 0.00/0.14 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% 0.14/0.35 % Computer : n025.cluster.edu
% 0.14/0.35 % Model : x86_64 x86_64
% 0.14/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.35 % Memory : 8042.1875MB
% 0.14/0.35 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.35 % CPULimit : 300
% 0.14/0.35 % WCLimit : 300
% 0.14/0.35 % DateTime : Sun Aug 27 08:54:23 EDT 2023
% 0.14/0.35 % CPUTime :
% 0.20/0.40 Command-line arguments: --no-flatten-goal
% 0.20/0.40
% 0.20/0.40 % SZS status Unsatisfiable
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% 0.20/0.40 % SZS output start Proof
% 0.20/0.40 Axiom 1 (commutativity_of_add): add(X, Y) = add(Y, X).
% 0.20/0.40 Axiom 2 (additive_id1): add(X, additive_identity) = X.
% 0.20/0.40 Axiom 3 (commutativity_of_multiply): multiply(X, Y) = multiply(Y, X).
% 0.20/0.40 Axiom 4 (multiplicative_inverse1): multiply(X, inverse(X)) = additive_identity.
% 0.20/0.40 Axiom 5 (distributivity2): multiply(X, add(Y, Z)) = add(multiply(X, Y), multiply(X, Z)).
% 0.20/0.40 Axiom 6 (distributivity1): add(X, multiply(Y, Z)) = multiply(add(X, Y), add(X, Z)).
% 0.20/0.40
% 0.20/0.40 Goal 1 (prove_operation): multiply(a, add(a, b)) = a.
% 0.20/0.40 Proof:
% 0.20/0.40 multiply(a, add(a, b))
% 0.20/0.40 = { by axiom 2 (additive_id1) R->L }
% 0.20/0.40 multiply(add(a, additive_identity), add(a, b))
% 0.20/0.40 = { by axiom 6 (distributivity1) R->L }
% 0.20/0.40 add(a, multiply(additive_identity, b))
% 0.20/0.40 = { by axiom 3 (commutativity_of_multiply) }
% 0.20/0.40 add(a, multiply(b, additive_identity))
% 0.20/0.40 = { by axiom 2 (additive_id1) R->L }
% 0.20/0.40 add(a, add(multiply(b, additive_identity), additive_identity))
% 0.20/0.40 = { by axiom 4 (multiplicative_inverse1) R->L }
% 0.20/0.40 add(a, add(multiply(b, additive_identity), multiply(b, inverse(b))))
% 0.20/0.40 = { by axiom 5 (distributivity2) R->L }
% 0.20/0.40 add(a, multiply(b, add(additive_identity, inverse(b))))
% 0.20/0.40 = { by axiom 1 (commutativity_of_add) R->L }
% 0.20/0.40 add(a, multiply(b, add(inverse(b), additive_identity)))
% 0.20/0.40 = { by axiom 2 (additive_id1) }
% 0.20/0.40 add(a, multiply(b, inverse(b)))
% 0.20/0.40 = { by axiom 4 (multiplicative_inverse1) }
% 0.20/0.40 add(a, additive_identity)
% 0.20/0.40 = { by axiom 2 (additive_id1) }
% 0.20/0.40 a
% 0.20/0.40 % SZS output end Proof
% 0.20/0.40
% 0.20/0.40 RESULT: Unsatisfiable (the axioms are contradictory).
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