TSTP Solution File: GRP079-1 by Twee---2.4.2
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%------------------------------------------------------------------------------
% File : Twee---2.4.2
% Problem : GRP079-1 : TPTP v8.1.2. Bugfixed v2.3.0.
% 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 : n006.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 : Thu Aug 31 01:16:54 EDT 2023
% Result : Unsatisfiable 0.20s 0.40s
% Output : Proof 0.20s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12 % Problem : GRP079-1 : TPTP v8.1.2. Bugfixed v2.3.0.
% 0.07/0.13 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% 0.14/0.34 % Computer : n006.cluster.edu
% 0.14/0.34 % Model : x86_64 x86_64
% 0.14/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.34 % Memory : 8042.1875MB
% 0.14/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.34 % CPULimit : 300
% 0.14/0.34 % WCLimit : 300
% 0.14/0.34 % DateTime : Mon Aug 28 21:16:21 EDT 2023
% 0.14/0.34 % CPUTime :
% 0.20/0.40 Command-line arguments: --no-flatten-goal
% 0.20/0.40
% 0.20/0.40 % SZS status Unsatisfiable
% 0.20/0.40
% 0.20/0.43 % SZS output start Proof
% 0.20/0.43 Take the following subset of the input axioms:
% 0.20/0.43 fof(identity, axiom, ![X]: identity=double_divide(X, inverse(X))).
% 0.20/0.43 fof(inverse, axiom, ![X2]: inverse(X2)=double_divide(X2, identity)).
% 0.20/0.43 fof(multiply, axiom, ![Y, X2]: multiply(X2, Y)=double_divide(double_divide(Y, X2), identity)).
% 0.20/0.43 fof(prove_these_axioms, negated_conjecture, multiply(inverse(a1), a1)!=identity | (multiply(identity, a2)!=a2 | multiply(multiply(a3, b3), c3)!=multiply(a3, multiply(b3, c3)))).
% 0.20/0.43 fof(single_axiom, axiom, ![Z, X2, Y2]: double_divide(double_divide(identity, X2), double_divide(double_divide(double_divide(Y2, Z), double_divide(identity, identity)), double_divide(X2, Z)))=Y2).
% 0.20/0.43
% 0.20/0.43 Now clausify the problem and encode Horn clauses using encoding 3 of
% 0.20/0.43 http://www.cse.chalmers.se/~nicsma/papers/horn.pdf.
% 0.20/0.43 We repeatedly replace C & s=t => u=v by the two clauses:
% 0.20/0.43 fresh(y, y, x1...xn) = u
% 0.20/0.43 C => fresh(s, t, x1...xn) = v
% 0.20/0.43 where fresh is a fresh function symbol and x1..xn are the free
% 0.20/0.43 variables of u and v.
% 0.20/0.43 A predicate p(X) is encoded as p(X)=true (this is sound, because the
% 0.20/0.43 input problem has no model of domain size 1).
% 0.20/0.43
% 0.20/0.43 The encoding turns the above axioms into the following unit equations and goals:
% 0.20/0.43
% 0.20/0.43 Axiom 1 (inverse): inverse(X) = double_divide(X, identity).
% 0.20/0.43 Axiom 2 (identity): identity = double_divide(X, inverse(X)).
% 0.20/0.43 Axiom 3 (multiply): multiply(X, Y) = double_divide(double_divide(Y, X), identity).
% 0.20/0.43 Axiom 4 (single_axiom): double_divide(double_divide(identity, X), double_divide(double_divide(double_divide(Y, Z), double_divide(identity, identity)), double_divide(X, Z))) = Y.
% 0.20/0.43
% 0.20/0.43 Lemma 5: double_divide(double_divide(identity, X), double_divide(double_divide(double_divide(Y, Z), inverse(identity)), double_divide(X, Z))) = Y.
% 0.20/0.43 Proof:
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(double_divide(double_divide(Y, Z), inverse(identity)), double_divide(X, Z)))
% 0.20/0.43 = { by axiom 1 (inverse) }
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(double_divide(double_divide(Y, Z), double_divide(identity, identity)), double_divide(X, Z)))
% 0.20/0.43 = { by axiom 4 (single_axiom) }
% 0.20/0.43 Y
% 0.20/0.43
% 0.20/0.43 Lemma 6: double_divide(double_divide(identity, X), double_divide(identity, double_divide(X, inverse(Y)))) = Y.
% 0.20/0.43 Proof:
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(identity, double_divide(X, inverse(Y))))
% 0.20/0.43 = { by axiom 2 (identity) }
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(double_divide(identity, inverse(identity)), double_divide(X, inverse(Y))))
% 0.20/0.43 = { by axiom 2 (identity) }
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(double_divide(double_divide(Y, inverse(Y)), inverse(identity)), double_divide(X, inverse(Y))))
% 0.20/0.43 = { by lemma 5 }
% 0.20/0.43 Y
% 0.20/0.43
% 0.20/0.43 Lemma 7: double_divide(double_divide(identity, X), inverse(identity)) = X.
% 0.20/0.43 Proof:
% 0.20/0.43 double_divide(double_divide(identity, X), inverse(identity))
% 0.20/0.43 = { by axiom 1 (inverse) }
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(identity, identity))
% 0.20/0.43 = { by axiom 2 (identity) }
% 0.20/0.43 double_divide(double_divide(identity, X), double_divide(identity, double_divide(X, inverse(X))))
% 0.20/0.43 = { by lemma 6 }
% 0.20/0.43 X
% 0.20/0.43
% 0.20/0.43 Lemma 8: inverse(identity) = identity.
% 0.20/0.43 Proof:
% 0.20/0.43 inverse(identity)
% 0.20/0.43 = { by lemma 7 R->L }
% 0.20/0.43 double_divide(double_divide(identity, inverse(identity)), inverse(identity))
% 0.20/0.44 = { by axiom 2 (identity) R->L }
% 0.20/0.44 double_divide(identity, inverse(identity))
% 0.20/0.44 = { by axiom 2 (identity) R->L }
% 0.20/0.44 identity
% 0.20/0.44
% 0.20/0.44 Lemma 9: inverse(double_divide(X, Y)) = multiply(Y, X).
% 0.20/0.44 Proof:
% 0.20/0.44 inverse(double_divide(X, Y))
% 0.20/0.44 = { by axiom 1 (inverse) }
% 0.20/0.44 double_divide(double_divide(X, Y), identity)
% 0.20/0.44 = { by axiom 3 (multiply) R->L }
% 0.20/0.44 multiply(Y, X)
% 0.20/0.44
% 0.20/0.44 Lemma 10: multiply(X, identity) = X.
% 0.20/0.44 Proof:
% 0.20/0.44 multiply(X, identity)
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 inverse(double_divide(identity, X))
% 0.20/0.44 = { by axiom 1 (inverse) }
% 0.20/0.44 double_divide(double_divide(identity, X), identity)
% 0.20/0.44 = { by lemma 8 R->L }
% 0.20/0.44 double_divide(double_divide(identity, X), inverse(identity))
% 0.20/0.44 = { by lemma 7 }
% 0.20/0.44 X
% 0.20/0.44
% 0.20/0.44 Lemma 11: double_divide(identity, inverse(X)) = X.
% 0.20/0.44 Proof:
% 0.20/0.44 double_divide(identity, inverse(X))
% 0.20/0.44 = { by lemma 7 R->L }
% 0.20/0.44 double_divide(double_divide(identity, double_divide(identity, inverse(X))), inverse(identity))
% 0.20/0.44 = { by axiom 1 (inverse) }
% 0.20/0.44 double_divide(double_divide(identity, double_divide(identity, inverse(X))), double_divide(identity, identity))
% 0.20/0.44 = { by axiom 2 (identity) }
% 0.20/0.44 double_divide(double_divide(identity, double_divide(identity, inverse(X))), double_divide(identity, double_divide(double_divide(identity, inverse(X)), inverse(double_divide(identity, inverse(X))))))
% 0.20/0.44 = { by lemma 9 }
% 0.20/0.44 double_divide(double_divide(identity, double_divide(identity, inverse(X))), double_divide(identity, double_divide(double_divide(identity, inverse(X)), multiply(inverse(X), identity))))
% 0.20/0.44 = { by lemma 10 }
% 0.20/0.44 double_divide(double_divide(identity, double_divide(identity, inverse(X))), double_divide(identity, double_divide(double_divide(identity, inverse(X)), inverse(X))))
% 0.20/0.44 = { by lemma 6 }
% 0.20/0.44 X
% 0.20/0.44
% 0.20/0.44 Lemma 12: double_divide(identity, X) = inverse(X).
% 0.20/0.44 Proof:
% 0.20/0.44 double_divide(identity, X)
% 0.20/0.44 = { by lemma 10 R->L }
% 0.20/0.44 multiply(double_divide(identity, X), identity)
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 inverse(double_divide(identity, double_divide(identity, X)))
% 0.20/0.44 = { by lemma 8 R->L }
% 0.20/0.44 inverse(double_divide(inverse(identity), double_divide(identity, X)))
% 0.20/0.44 = { by axiom 1 (inverse) }
% 0.20/0.44 inverse(double_divide(double_divide(identity, identity), double_divide(identity, X)))
% 0.20/0.44 = { by lemma 11 R->L }
% 0.20/0.44 inverse(double_divide(double_divide(identity, identity), double_divide(identity, double_divide(identity, inverse(X)))))
% 0.20/0.44 = { by lemma 6 }
% 0.20/0.44 inverse(X)
% 0.20/0.44
% 0.20/0.44 Lemma 13: multiply(identity, X) = inverse(inverse(X)).
% 0.20/0.44 Proof:
% 0.20/0.44 multiply(identity, X)
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 inverse(double_divide(X, identity))
% 0.20/0.44 = { by axiom 1 (inverse) R->L }
% 0.20/0.44 inverse(inverse(X))
% 0.20/0.44
% 0.20/0.44 Lemma 14: inverse(inverse(X)) = X.
% 0.20/0.44 Proof:
% 0.20/0.44 inverse(inverse(X))
% 0.20/0.44 = { by lemma 12 R->L }
% 0.20/0.44 inverse(double_divide(identity, X))
% 0.20/0.44 = { by lemma 9 }
% 0.20/0.44 multiply(X, identity)
% 0.20/0.44 = { by lemma 10 }
% 0.20/0.44 X
% 0.20/0.44
% 0.20/0.44 Lemma 15: double_divide(inverse(X), double_divide(Y, double_divide(X, Y))) = identity.
% 0.20/0.44 Proof:
% 0.20/0.44 double_divide(inverse(X), double_divide(Y, double_divide(X, Y)))
% 0.20/0.44 = { by lemma 12 R->L }
% 0.20/0.44 double_divide(double_divide(identity, X), double_divide(Y, double_divide(X, Y)))
% 0.20/0.44 = { by lemma 7 R->L }
% 0.20/0.44 double_divide(double_divide(identity, X), double_divide(double_divide(double_divide(identity, Y), inverse(identity)), double_divide(X, Y)))
% 0.20/0.44 = { by lemma 5 }
% 0.20/0.44 identity
% 0.20/0.44
% 0.20/0.44 Lemma 16: double_divide(X, double_divide(multiply(inverse(Y), X), Y)) = identity.
% 0.20/0.44 Proof:
% 0.20/0.44 double_divide(X, double_divide(multiply(inverse(Y), X), Y))
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 double_divide(X, double_divide(inverse(double_divide(X, inverse(Y))), Y))
% 0.20/0.44 = { by lemma 12 R->L }
% 0.20/0.44 double_divide(X, double_divide(double_divide(identity, double_divide(X, inverse(Y))), Y))
% 0.20/0.44 = { by lemma 10 R->L }
% 0.20/0.44 double_divide(multiply(X, identity), double_divide(double_divide(identity, double_divide(X, inverse(Y))), Y))
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 double_divide(inverse(double_divide(identity, X)), double_divide(double_divide(identity, double_divide(X, inverse(Y))), Y))
% 0.20/0.44 = { by lemma 6 R->L }
% 0.20/0.44 double_divide(inverse(double_divide(identity, X)), double_divide(double_divide(identity, double_divide(X, inverse(Y))), double_divide(double_divide(identity, X), double_divide(identity, double_divide(X, inverse(Y))))))
% 0.20/0.44 = { by lemma 15 }
% 0.20/0.44 identity
% 0.20/0.44
% 0.20/0.44 Lemma 17: double_divide(X, multiply(double_divide(X, Y), Y)) = identity.
% 0.20/0.44 Proof:
% 0.20/0.44 double_divide(X, multiply(double_divide(X, Y), Y))
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 double_divide(X, inverse(double_divide(Y, double_divide(X, Y))))
% 0.20/0.44 = { by axiom 1 (inverse) }
% 0.20/0.44 double_divide(X, double_divide(double_divide(Y, double_divide(X, Y)), identity))
% 0.20/0.44 = { by lemma 14 R->L }
% 0.20/0.44 double_divide(inverse(inverse(X)), double_divide(double_divide(Y, double_divide(X, Y)), identity))
% 0.20/0.44 = { by lemma 15 R->L }
% 0.20/0.44 double_divide(inverse(inverse(X)), double_divide(double_divide(Y, double_divide(X, Y)), double_divide(inverse(X), double_divide(Y, double_divide(X, Y)))))
% 0.20/0.44 = { by lemma 15 }
% 0.20/0.44 identity
% 0.20/0.44
% 0.20/0.44 Lemma 18: multiply(inverse(X), X) = inverse(identity).
% 0.20/0.44 Proof:
% 0.20/0.44 multiply(inverse(X), X)
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 inverse(double_divide(X, inverse(X)))
% 0.20/0.44 = { by axiom 2 (identity) R->L }
% 0.20/0.44 inverse(identity)
% 0.20/0.44
% 0.20/0.44 Lemma 19: multiply(inverse(X), multiply(X, Y)) = Y.
% 0.20/0.44 Proof:
% 0.20/0.44 multiply(inverse(X), multiply(X, Y))
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 multiply(inverse(X), inverse(double_divide(Y, X)))
% 0.20/0.44 = { by axiom 1 (inverse) }
% 0.20/0.44 multiply(inverse(X), double_divide(double_divide(Y, X), identity))
% 0.20/0.44 = { by lemma 12 R->L }
% 0.20/0.44 multiply(double_divide(identity, X), double_divide(double_divide(Y, X), identity))
% 0.20/0.44 = { by lemma 8 R->L }
% 0.20/0.44 multiply(double_divide(inverse(identity), X), double_divide(double_divide(Y, X), identity))
% 0.20/0.44 = { by lemma 8 R->L }
% 0.20/0.44 multiply(double_divide(inverse(identity), X), double_divide(double_divide(Y, X), inverse(identity)))
% 0.20/0.44 = { by lemma 18 R->L }
% 0.20/0.44 multiply(double_divide(multiply(inverse(Z), Z), X), double_divide(double_divide(Y, X), inverse(identity)))
% 0.20/0.44 = { by lemma 12 R->L }
% 0.20/0.44 multiply(double_divide(multiply(double_divide(identity, Z), Z), X), double_divide(double_divide(Y, X), inverse(identity)))
% 0.20/0.44 = { by lemma 9 R->L }
% 0.20/0.44 inverse(double_divide(double_divide(double_divide(Y, X), inverse(identity)), double_divide(multiply(double_divide(identity, Z), Z), X)))
% 0.20/0.44 = { by lemma 12 R->L }
% 0.20/0.44 double_divide(identity, double_divide(double_divide(double_divide(Y, X), inverse(identity)), double_divide(multiply(double_divide(identity, Z), Z), X)))
% 0.20/0.44 = { by lemma 17 R->L }
% 0.20/0.44 double_divide(double_divide(identity, multiply(double_divide(identity, Z), Z)), double_divide(double_divide(double_divide(Y, X), inverse(identity)), double_divide(multiply(double_divide(identity, Z), Z), X)))
% 0.20/0.44 = { by lemma 5 }
% 0.20/0.44 Y
% 0.20/0.44
% 0.20/0.44 Lemma 20: double_divide(X, double_divide(Y, X)) = Y.
% 0.20/0.44 Proof:
% 0.20/0.44 double_divide(X, double_divide(Y, X))
% 0.20/0.44 = { by lemma 11 R->L }
% 0.20/0.44 double_divide(identity, inverse(double_divide(X, double_divide(Y, X))))
% 0.20/0.44 = { by lemma 9 }
% 0.20/0.44 double_divide(identity, multiply(double_divide(Y, X), X))
% 0.20/0.44 = { by lemma 12 }
% 0.20/0.44 inverse(multiply(double_divide(Y, X), X))
% 0.20/0.44 = { by lemma 10 R->L }
% 0.20/0.44 multiply(inverse(multiply(double_divide(Y, X), X)), identity)
% 0.20/0.44 = { by lemma 8 R->L }
% 0.20/0.44 multiply(inverse(multiply(double_divide(Y, X), X)), inverse(identity))
% 0.20/0.44 = { by lemma 17 R->L }
% 0.20/0.45 multiply(inverse(multiply(double_divide(Y, X), X)), inverse(double_divide(Y, multiply(double_divide(Y, X), X))))
% 0.20/0.45 = { by lemma 9 }
% 0.20/0.45 multiply(inverse(multiply(double_divide(Y, X), X)), multiply(multiply(double_divide(Y, X), X), Y))
% 0.20/0.45 = { by lemma 19 }
% 0.20/0.45 Y
% 0.20/0.45
% 0.20/0.45 Lemma 21: double_divide(double_divide(X, Y), X) = Y.
% 0.20/0.45 Proof:
% 0.20/0.45 double_divide(double_divide(X, Y), X)
% 0.20/0.45 = { by lemma 20 R->L }
% 0.20/0.45 double_divide(double_divide(X, Y), double_divide(Y, double_divide(X, Y)))
% 0.20/0.45 = { by lemma 20 }
% 0.20/0.45 Y
% 0.20/0.45
% 0.20/0.45 Lemma 22: multiply(X, double_divide(X, Y)) = inverse(Y).
% 0.20/0.45 Proof:
% 0.20/0.45 multiply(X, double_divide(X, Y))
% 0.20/0.45 = { by lemma 9 R->L }
% 0.20/0.45 inverse(double_divide(double_divide(X, Y), X))
% 0.20/0.45 = { by lemma 21 }
% 0.20/0.45 inverse(Y)
% 0.20/0.45
% 0.20/0.45 Lemma 23: double_divide(inverse(X), Y) = multiply(X, inverse(Y)).
% 0.20/0.45 Proof:
% 0.20/0.45 double_divide(inverse(X), Y)
% 0.20/0.45 = { by lemma 5 R->L }
% 0.20/0.45 double_divide(double_divide(identity, Z), double_divide(double_divide(double_divide(double_divide(inverse(X), Y), double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X)), inverse(identity)), double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))))
% 0.20/0.45 = { by lemma 16 }
% 0.20/0.45 double_divide(double_divide(identity, Z), double_divide(double_divide(identity, inverse(identity)), double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))))
% 0.20/0.45 = { by lemma 12 }
% 0.20/0.45 double_divide(inverse(Z), double_divide(double_divide(identity, inverse(identity)), double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))))
% 0.20/0.45 = { by lemma 11 }
% 0.20/0.45 double_divide(inverse(Z), double_divide(identity, double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))))
% 0.20/0.45 = { by lemma 6 R->L }
% 0.20/0.45 double_divide(double_divide(double_divide(identity, double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))), double_divide(identity, double_divide(double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X)), inverse(inverse(Z))))), double_divide(identity, double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))))
% 0.20/0.45 = { by lemma 21 }
% 0.20/0.45 double_divide(identity, double_divide(double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X)), inverse(inverse(Z))))
% 0.20/0.45 = { by lemma 12 }
% 0.20/0.45 inverse(double_divide(double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X)), inverse(inverse(Z))))
% 0.20/0.45 = { by lemma 9 }
% 0.20/0.45 multiply(inverse(inverse(Z)), double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X)))
% 0.20/0.45 = { by lemma 14 }
% 0.20/0.45 multiply(Z, double_divide(Z, double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X)))
% 0.20/0.45 = { by lemma 22 }
% 0.20/0.45 inverse(double_divide(multiply(inverse(X), double_divide(inverse(X), Y)), X))
% 0.20/0.45 = { by lemma 9 }
% 0.20/0.45 multiply(X, multiply(inverse(X), double_divide(inverse(X), Y)))
% 0.20/0.45 = { by lemma 22 }
% 0.20/0.45 multiply(X, inverse(Y))
% 0.20/0.45
% 0.20/0.45 Goal 1 (prove_these_axioms): tuple(multiply(inverse(a1), a1), multiply(identity, a2), multiply(multiply(a3, b3), c3)) = tuple(identity, a2, multiply(a3, multiply(b3, c3))).
% 0.20/0.45 Proof:
% 0.20/0.45 tuple(multiply(inverse(a1), a1), multiply(identity, a2), multiply(multiply(a3, b3), c3))
% 0.20/0.45 = { by lemma 13 }
% 0.20/0.45 tuple(multiply(inverse(a1), a1), inverse(inverse(a2)), multiply(multiply(a3, b3), c3))
% 0.20/0.45 = { by lemma 18 }
% 0.20/0.45 tuple(inverse(identity), inverse(inverse(a2)), multiply(multiply(a3, b3), c3))
% 0.20/0.45 = { by lemma 8 }
% 0.20/0.45 tuple(identity, inverse(inverse(a2)), multiply(multiply(a3, b3), c3))
% 0.20/0.45 = { by lemma 14 }
% 0.20/0.45 tuple(identity, a2, multiply(multiply(a3, b3), c3))
% 0.20/0.45 = { by lemma 9 R->L }
% 0.20/0.45 tuple(identity, a2, multiply(inverse(double_divide(b3, a3)), c3))
% 0.20/0.45 = { by lemma 5 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 19 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), multiply(c3, double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)))), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 14 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), multiply(c3, inverse(inverse(double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)))))), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 13 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), multiply(c3, multiply(identity, double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3))))), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 9 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), multiply(c3, inverse(double_divide(double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)), identity)))), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 23 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), double_divide(inverse(c3), double_divide(double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)), identity))), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 16 R->L }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), double_divide(inverse(c3), double_divide(double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)), double_divide(c3, double_divide(multiply(inverse(double_divide(b3, a3)), c3), double_divide(b3, a3)))))), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 15 }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(multiply(inverse(c3), identity), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 10 }
% 0.20/0.45 tuple(identity, a2, double_divide(double_divide(identity, a3), double_divide(double_divide(inverse(c3), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 12 }
% 0.20/0.45 tuple(identity, a2, double_divide(inverse(a3), double_divide(double_divide(inverse(c3), inverse(identity)), double_divide(a3, double_divide(b3, a3)))))
% 0.20/0.45 = { by lemma 23 }
% 0.20/0.45 tuple(identity, a2, multiply(a3, inverse(double_divide(double_divide(inverse(c3), inverse(identity)), double_divide(a3, double_divide(b3, a3))))))
% 0.20/0.45 = { by lemma 9 }
% 0.20/0.45 tuple(identity, a2, multiply(a3, multiply(double_divide(a3, double_divide(b3, a3)), double_divide(inverse(c3), inverse(identity)))))
% 0.20/0.45 = { by lemma 23 }
% 0.20/0.45 tuple(identity, a2, multiply(a3, multiply(double_divide(a3, double_divide(b3, a3)), multiply(c3, inverse(inverse(identity))))))
% 0.20/0.45 = { by lemma 14 }
% 0.20/0.45 tuple(identity, a2, multiply(a3, multiply(double_divide(a3, double_divide(b3, a3)), multiply(c3, identity))))
% 0.20/0.45 = { by lemma 10 }
% 0.20/0.45 tuple(identity, a2, multiply(a3, multiply(double_divide(a3, double_divide(b3, a3)), c3)))
% 0.20/0.45 = { by lemma 20 }
% 0.20/0.45 tuple(identity, a2, multiply(a3, multiply(b3, c3)))
% 0.20/0.45 % SZS output end Proof
% 0.20/0.45
% 0.20/0.45 RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------