TSTP Solution File: SYN581-1 by Twee---2.4.2

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Twee---2.4.2
% Problem  : SYN581-1 : TPTP v8.1.2. Released v2.5.0.
% 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 : n001.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 : Fri Sep  1 03:35:19 EDT 2023

% Result   : Unsatisfiable 0.19s 0.51s
% Output   : Proof 0.19s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.12  % Problem  : SYN581-1 : TPTP v8.1.2. Released v2.5.0.
% 0.00/0.13  % Command  : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% 0.15/0.34  % Computer : n001.cluster.edu
% 0.15/0.34  % Model    : x86_64 x86_64
% 0.15/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.34  % Memory   : 8042.1875MB
% 0.15/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.15/0.34  % CPULimit : 300
% 0.15/0.34  % WCLimit  : 300
% 0.15/0.34  % DateTime : Sat Aug 26 19:29:46 EDT 2023
% 0.15/0.34  % CPUTime  : 
% 0.19/0.51  Command-line arguments: --flatten
% 0.19/0.51  
% 0.19/0.51  % SZS status Unsatisfiable
% 0.19/0.51  
% 0.19/0.54  % SZS output start Proof
% 0.19/0.54  Take the following subset of the input axioms:
% 0.19/0.54    fof(not_p11_9, negated_conjecture, ~p11(f4(f6(c15, c18)), c16)).
% 0.19/0.54    fof(p11_21, negated_conjecture, ![X7, X8, X9, X10]: (p11(X7, X8) | (~p2(X9, X7) | (~p2(X10, X8) | ~p11(X9, X10))))).
% 0.19/0.54    fof(p11_8, negated_conjecture, p11(f4(f6(c15, c14)), c16)).
% 0.19/0.54    fof(p12_4, negated_conjecture, p12(c13, c18)).
% 0.19/0.54    fof(p2_14, negated_conjecture, ![X23, X24]: (p2(f4(X23), f4(X24)) | ~p2(X23, X24))).
% 0.19/0.54    fof(p2_18, negated_conjecture, ![X18, X19, X20]: (p2(X19, X20) | (~p2(X18, X19) | ~p2(X18, X20)))).
% 0.19/0.54    fof(p2_2, negated_conjecture, ![X18_2]: p2(X18_2, X18_2)).
% 0.19/0.54    fof(p2_23, negated_conjecture, ![X25, X26, X27, X28]: (p2(f6(X25, X26), f6(X27, X28)) | (~p2(X26, X28) | ~p5(X25, X27)))).
% 0.19/0.54    fof(p2_5, negated_conjecture, p2(c18, c14)).
% 0.19/0.54    fof(p2_6, negated_conjecture, p2(f3(c18), f8(f9(c17)))).
% 0.19/0.54    fof(p5_3, negated_conjecture, ![X31]: p5(X31, X31)).
% 0.19/0.54  
% 0.19/0.54  Now clausify the problem and encode Horn clauses using encoding 3 of
% 0.19/0.54  http://www.cse.chalmers.se/~nicsma/papers/horn.pdf.
% 0.19/0.54  We repeatedly replace C & s=t => u=v by the two clauses:
% 0.19/0.54    fresh(y, y, x1...xn) = u
% 0.19/0.54    C => fresh(s, t, x1...xn) = v
% 0.19/0.54  where fresh is a fresh function symbol and x1..xn are the free
% 0.19/0.54  variables of u and v.
% 0.19/0.54  A predicate p(X) is encoded as p(X)=true (this is sound, because the
% 0.19/0.54  input problem has no model of domain size 1).
% 0.19/0.54  
% 0.19/0.54  The encoding turns the above axioms into the following unit equations and goals:
% 0.19/0.54  
% 0.19/0.54  Axiom 1 (p5_3): p5(X, X) = true.
% 0.19/0.54  Axiom 2 (p12_4): p12(c13, c18) = true.
% 0.19/0.54  Axiom 3 (p2_2): p2(X, X) = true.
% 0.19/0.54  Axiom 4 (p2_5): p2(c18, c14) = true.
% 0.19/0.54  Axiom 5 (p11_21): fresh29(X, X, Y, Z) = true.
% 0.19/0.54  Axiom 6 (p2_14): fresh11(X, X, Y, Z) = true.
% 0.19/0.54  Axiom 7 (p2_18): fresh8(X, X, Y, Z) = true.
% 0.19/0.54  Axiom 8 (p11_21): fresh15(X, X, Y, Z, W) = p11(Y, Z).
% 0.19/0.54  Axiom 9 (p2_18): fresh9(X, X, Y, Z, W) = p2(Y, Z).
% 0.19/0.54  Axiom 10 (p11_8): p11(f4(f6(c15, c14)), c16) = true.
% 0.19/0.54  Axiom 11 (p2_6): p2(f3(c18), f8(f9(c17))) = true.
% 0.19/0.54  Axiom 12 (p11_21): fresh28(X, X, Y, Z, W, V) = fresh29(p2(W, Y), true, Y, Z).
% 0.19/0.54  Axiom 13 (p2_14): fresh11(p2(X, Y), true, X, Y) = p2(f4(X), f4(Y)).
% 0.19/0.54  Axiom 14 (p2_23): fresh6(X, X, Y, Z, W, V) = true.
% 0.19/0.54  Axiom 15 (p2_23): fresh7(X, X, Y, Z, W, V) = p2(f6(Y, Z), f6(W, V)).
% 0.19/0.54  Axiom 16 (p2_18): fresh9(p2(X, Y), true, Z, Y, X) = fresh8(p2(X, Z), true, Z, Y).
% 0.19/0.54  Axiom 17 (p11_21): fresh28(p11(X, Y), true, Z, W, X, Y) = fresh15(p2(Y, W), true, Z, W, X).
% 0.19/0.54  Axiom 18 (p2_23): fresh7(p5(X, Y), true, X, Z, Y, W) = fresh6(p2(Z, W), true, X, Z, Y, W).
% 0.19/0.54  
% 0.19/0.54  Lemma 19: p2(X, X) = p12(c13, c18).
% 0.19/0.54  Proof:
% 0.19/0.54    p2(X, X)
% 0.19/0.54  = { by axiom 3 (p2_2) }
% 0.19/0.54    true
% 0.19/0.54  = { by axiom 2 (p12_4) R->L }
% 0.19/0.54    p12(c13, c18)
% 0.19/0.54  
% 0.19/0.54  Lemma 20: p2(c18, c14) = p12(c13, c18).
% 0.19/0.54  Proof:
% 0.19/0.54    p2(c18, c14)
% 0.19/0.54  = { by axiom 4 (p2_5) }
% 0.19/0.54    true
% 0.19/0.54  = { by axiom 2 (p12_4) R->L }
% 0.19/0.54    p12(c13, c18)
% 0.19/0.54  
% 0.19/0.54  Lemma 21: p2(f3(c18), f8(f9(c17))) = p2(c18, c14).
% 0.19/0.54  Proof:
% 0.19/0.54    p2(f3(c18), f8(f9(c17)))
% 0.19/0.54  = { by axiom 11 (p2_6) }
% 0.19/0.54    true
% 0.19/0.54  = { by axiom 2 (p12_4) R->L }
% 0.19/0.54    p12(c13, c18)
% 0.19/0.54  = { by lemma 20 R->L }
% 0.19/0.54    p2(c18, c14)
% 0.19/0.54  
% 0.19/0.54  Goal 1 (not_p11_9): p11(f4(f6(c15, c18)), c16) = true.
% 0.19/0.54  Proof:
% 0.19/0.54    p11(f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by axiom 8 (p11_21) R->L }
% 0.19/0.54    fresh15(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by lemma 21 }
% 0.19/0.54    fresh15(p2(c18, c14), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by lemma 20 }
% 0.19/0.54    fresh15(p12(c13, c18), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by lemma 19 R->L }
% 0.19/0.54    fresh15(p2(c16, c16), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by lemma 21 }
% 0.19/0.54    fresh15(p2(c16, c16), p2(c18, c14), f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by lemma 20 }
% 0.19/0.54    fresh15(p2(c16, c16), p12(c13, c18), f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by axiom 2 (p12_4) }
% 0.19/0.54    fresh15(p2(c16, c16), true, f4(f6(c15, c18)), c16, f4(f6(c15, c14)))
% 0.19/0.54  = { by axiom 17 (p11_21) R->L }
% 0.19/0.54    fresh28(p11(f4(f6(c15, c14)), c16), true, f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by axiom 2 (p12_4) R->L }
% 0.19/0.54    fresh28(p11(f4(f6(c15, c14)), c16), p12(c13, c18), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by lemma 20 R->L }
% 0.19/0.54    fresh28(p11(f4(f6(c15, c14)), c16), p2(c18, c14), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by lemma 21 R->L }
% 0.19/0.54    fresh28(p11(f4(f6(c15, c14)), c16), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by axiom 10 (p11_8) }
% 0.19/0.54    fresh28(true, p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by axiom 2 (p12_4) R->L }
% 0.19/0.54    fresh28(p12(c13, c18), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by lemma 20 R->L }
% 0.19/0.54    fresh28(p2(c18, c14), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by lemma 21 R->L }
% 0.19/0.54    fresh28(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16, f4(f6(c15, c14)), c16)
% 0.19/0.54  = { by axiom 12 (p11_21) }
% 0.19/0.54    fresh29(p2(f4(f6(c15, c14)), f4(f6(c15, c18))), true, f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by axiom 2 (p12_4) R->L }
% 0.19/0.54    fresh29(p2(f4(f6(c15, c14)), f4(f6(c15, c18))), p12(c13, c18), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 20 R->L }
% 0.19/0.54    fresh29(p2(f4(f6(c15, c14)), f4(f6(c15, c18))), p2(c18, c14), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 21 R->L }
% 0.19/0.54    fresh29(p2(f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by axiom 9 (p2_18) R->L }
% 0.19/0.54    fresh29(fresh9(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 21 }
% 0.19/0.54    fresh29(fresh9(p2(c18, c14), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 20 }
% 0.19/0.54    fresh29(fresh9(p12(c13, c18), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 19 R->L }
% 0.19/0.54    fresh29(fresh9(p2(f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 21 }
% 0.19/0.54    fresh29(fresh9(p2(f4(f6(c15, c18)), f4(f6(c15, c18))), p2(c18, c14), f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by lemma 20 }
% 0.19/0.54    fresh29(fresh9(p2(f4(f6(c15, c18)), f4(f6(c15, c18))), p12(c13, c18), f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by axiom 2 (p12_4) }
% 0.19/0.54    fresh29(fresh9(p2(f4(f6(c15, c18)), f4(f6(c15, c18))), true, f4(f6(c15, c14)), f4(f6(c15, c18)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.54  = { by axiom 16 (p2_18) }
% 0.19/0.54    fresh29(fresh8(p2(f4(f6(c15, c18)), f4(f6(c15, c14))), true, f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) R->L }
% 0.19/0.55    fresh29(fresh8(p2(f4(f6(c15, c18)), f4(f6(c15, c14))), p12(c13, c18), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 R->L }
% 0.19/0.55    fresh29(fresh8(p2(f4(f6(c15, c18)), f4(f6(c15, c14))), p2(c18, c14), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(fresh8(p2(f4(f6(c15, c18)), f4(f6(c15, c14))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 13 (p2_14) R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p2(f6(c15, c18), f6(c15, c14)), true, f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p2(f6(c15, c18), f6(c15, c14)), p12(c13, c18), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p2(f6(c15, c18), f6(c15, c14)), p2(c18, c14), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p2(f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 15 (p2_23) R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p2(c18, c14), p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p12(c13, c18), p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(true, p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 1 (p5_3) R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p5(c15, c15), p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p5(c15, c15), p2(c18, c14), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p5(c15, c15), p12(c13, c18), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh7(p5(c15, c15), true, c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 18 (p2_23) }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh6(p2(c18, c14), true, c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh6(p2(c18, c14), p12(c13, c18), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh6(p2(c18, c14), p2(c18, c14), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh6(p2(c18, c14), p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(fresh6(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), c15, c18, c15, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 14 (p2_23) }
% 0.19/0.55    fresh29(fresh8(fresh11(true, p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p12(c13, c18), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p2(c18, c14), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(fresh8(fresh11(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), f6(c15, c18), f6(c15, c14)), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 6 (p2_14) }
% 0.19/0.55    fresh29(fresh8(true, p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) R->L }
% 0.19/0.55    fresh29(fresh8(p12(c13, c18), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 R->L }
% 0.19/0.55    fresh29(fresh8(p2(c18, c14), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(fresh8(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c14)), f4(f6(c15, c18))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 7 (p2_18) }
% 0.19/0.55    fresh29(true, p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 2 (p12_4) R->L }
% 0.19/0.55    fresh29(p12(c13, c18), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 20 R->L }
% 0.19/0.55    fresh29(p2(c18, c14), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by lemma 21 R->L }
% 0.19/0.55    fresh29(p2(f3(c18), f8(f9(c17))), p2(f3(c18), f8(f9(c17))), f4(f6(c15, c18)), c16)
% 0.19/0.55  = { by axiom 5 (p11_21) }
% 0.19/0.55    true
% 0.19/0.55  % SZS output end Proof
% 0.19/0.55  
% 0.19/0.55  RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------