TSTP Solution File: SET619+3 by Z3---4.8.9.0

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Z3---4.8.9.0
% Problem  : SET619+3 : TPTP v8.1.0. Released v2.2.0.
% Transfm  : none
% Format   : tptp
% Command  : z3_tptp -proof -model -t:%d -file:%s

% Computer : n026.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 : Tue Sep 20 05:07:21 EDT 2022

% Result   : Theorem 0.14s 0.34s
% Output   : Proof 0.14s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.08  % Problem  : SET619+3 : TPTP v8.1.0. Released v2.2.0.
% 0.00/0.09  % Command  : z3_tptp -proof -model -t:%d -file:%s
% 0.09/0.29  % Computer : n026.cluster.edu
% 0.09/0.29  % Model    : x86_64 x86_64
% 0.09/0.29  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.09/0.29  % Memory   : 8042.1875MB
% 0.09/0.29  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.09/0.29  % CPULimit : 300
% 0.09/0.29  % WCLimit  : 300
% 0.09/0.29  % DateTime : Sat Sep  3 07:12:53 EDT 2022
% 0.09/0.29  % CPUTime  : 
% 0.09/0.29  Z3tptp [4.8.9.0] (c) 2006-20**. Microsoft Corp.
% 0.09/0.29  Usage: tptp [options] [-file:]file
% 0.09/0.29    -h, -?       prints this message.
% 0.09/0.29    -smt2        print SMT-LIB2 benchmark.
% 0.09/0.29    -m, -model   generate model.
% 0.09/0.29    -p, -proof   generate proof.
% 0.09/0.29    -c, -core    generate unsat core of named formulas.
% 0.09/0.29    -st, -statistics display statistics.
% 0.09/0.29    -t:timeout   set timeout (in second).
% 0.09/0.29    -smt2status  display status in smt2 format instead of SZS.
% 0.09/0.29    -check_status check the status produced by Z3 against annotation in benchmark.
% 0.09/0.29    -<param>:<value> configuration parameter and value.
% 0.09/0.29    -o:<output-file> file to place output in.
% 0.14/0.34  % SZS status Theorem
% 0.14/0.34  % SZS output start Proof
% 0.14/0.34  tff(union_type, type, (
% 0.14/0.34     union: ( $i * $i ) > $i)).
% 0.14/0.34  tff(intersection_type, type, (
% 0.14/0.34     intersection: ( $i * $i ) > $i)).
% 0.14/0.34  tff(tptp_fun_C_2_type, type, (
% 0.14/0.34     tptp_fun_C_2: $i)).
% 0.14/0.34  tff(tptp_fun_B_3_type, type, (
% 0.14/0.34     tptp_fun_B_3: $i)).
% 0.14/0.34  tff(symmetric_difference_type, type, (
% 0.14/0.34     symmetric_difference: ( $i * $i ) > $i)).
% 0.14/0.34  tff(difference_type, type, (
% 0.14/0.34     difference: ( $i * $i ) > $i)).
% 0.14/0.34  tff(1,plain,
% 0.14/0.34      (^[B: $i, C: $i] : refl((union(B, C) = union(C, B)) <=> (union(B, C) = union(C, B)))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(2,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, C) = union(C, B)) <=> ![B: $i, C: $i] : (union(B, C) = union(C, B))),
% 0.14/0.34      inference(quant_intro,[status(thm)],[1])).
% 0.14/0.34  tff(3,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, C) = union(C, B)) <=> ![B: $i, C: $i] : (union(B, C) = union(C, B))),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(4,axiom,(![B: $i, C: $i] : (union(B, C) = union(C, B))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','commutativity_of_union')).
% 0.14/0.34  tff(5,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, C) = union(C, B))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[4, 3])).
% 0.14/0.34  tff(6,plain,(
% 0.14/0.34      ![B: $i, C: $i] : (union(B, C) = union(C, B))),
% 0.14/0.34      inference(skolemize,[status(sab)],[5])).
% 0.14/0.34  tff(7,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, C) = union(C, B))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[6, 2])).
% 0.14/0.34  tff(8,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (union(B, C) = union(C, B))) | (union(intersection(B!3, C!2), symmetric_difference(B!3, C!2)) = union(symmetric_difference(B!3, C!2), intersection(B!3, C!2)))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(9,plain,
% 0.14/0.34      (union(intersection(B!3, C!2), symmetric_difference(B!3, C!2)) = union(symmetric_difference(B!3, C!2), intersection(B!3, C!2))),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[8, 7])).
% 0.14/0.34  tff(10,plain,
% 0.14/0.34      (^[B: $i, C: $i] : refl((symmetric_difference(B, C) = union(difference(B, C), difference(C, B))) <=> (symmetric_difference(B, C) = union(difference(B, C), difference(C, B))))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(11,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B))) <=> ![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))),
% 0.14/0.34      inference(quant_intro,[status(thm)],[10])).
% 0.14/0.34  tff(12,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B))) <=> ![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(13,axiom,(![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','symmetric_difference_defn')).
% 0.14/0.34  tff(14,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[13, 12])).
% 0.14/0.34  tff(15,plain,(
% 0.14/0.34      ![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))),
% 0.14/0.34      inference(skolemize,[status(sab)],[14])).
% 0.14/0.34  tff(16,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[15, 11])).
% 0.14/0.34  tff(17,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (symmetric_difference(B, C) = union(difference(B, C), difference(C, B)))) | (symmetric_difference(C!2, B!3) = union(difference(C!2, B!3), difference(B!3, C!2)))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(18,plain,
% 0.14/0.34      (symmetric_difference(C!2, B!3) = union(difference(C!2, B!3), difference(B!3, C!2))),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[17, 16])).
% 0.14/0.34  tff(19,plain,
% 0.14/0.34      (^[B: $i, C: $i] : refl((symmetric_difference(B, C) = symmetric_difference(C, B)) <=> (symmetric_difference(B, C) = symmetric_difference(C, B)))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(20,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B)) <=> ![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))),
% 0.14/0.34      inference(quant_intro,[status(thm)],[19])).
% 0.14/0.34  tff(21,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B)) <=> ![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(22,axiom,(![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','commutativity_of_symmetric_difference')).
% 0.14/0.34  tff(23,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[22, 21])).
% 0.14/0.34  tff(24,plain,(
% 0.14/0.34      ![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))),
% 0.14/0.34      inference(skolemize,[status(sab)],[23])).
% 0.14/0.34  tff(25,plain,
% 0.14/0.34      (![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[24, 20])).
% 0.14/0.34  tff(26,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (symmetric_difference(B, C) = symmetric_difference(C, B))) | (symmetric_difference(C!2, B!3) = symmetric_difference(B!3, C!2))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(27,plain,
% 0.14/0.34      (symmetric_difference(C!2, B!3) = symmetric_difference(B!3, C!2)),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[26, 25])).
% 0.14/0.34  tff(28,plain,
% 0.14/0.34      (symmetric_difference(B!3, C!2) = symmetric_difference(C!2, B!3)),
% 0.14/0.34      inference(symmetry,[status(thm)],[27])).
% 0.14/0.34  tff(29,plain,
% 0.14/0.34      (symmetric_difference(B!3, C!2) = union(difference(C!2, B!3), difference(B!3, C!2))),
% 0.14/0.34      inference(transitivity,[status(thm)],[28, 18])).
% 0.14/0.34  tff(30,plain,
% 0.14/0.34      (union(intersection(B!3, C!2), symmetric_difference(B!3, C!2)) = union(intersection(B!3, C!2), union(difference(C!2, B!3), difference(B!3, C!2)))),
% 0.14/0.34      inference(monotonicity,[status(thm)],[29])).
% 0.14/0.34  tff(31,plain,
% 0.14/0.34      (union(intersection(B!3, C!2), union(difference(C!2, B!3), difference(B!3, C!2))) = union(intersection(B!3, C!2), symmetric_difference(B!3, C!2))),
% 0.14/0.34      inference(symmetry,[status(thm)],[30])).
% 0.14/0.34  tff(32,plain,
% 0.14/0.34      (^[B: $i, C: $i, D: $i] : refl((union(union(B, C), D) = union(B, union(C, D))) <=> (union(union(B, C), D) = union(B, union(C, D))))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(33,plain,
% 0.14/0.34      (![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D))) <=> ![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))),
% 0.14/0.34      inference(quant_intro,[status(thm)],[32])).
% 0.14/0.34  tff(34,plain,
% 0.14/0.34      (![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D))) <=> ![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(35,axiom,(![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','associativity_of_union')).
% 0.14/0.34  tff(36,plain,
% 0.14/0.34      (![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[35, 34])).
% 0.14/0.34  tff(37,plain,(
% 0.14/0.34      ![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))),
% 0.14/0.34      inference(skolemize,[status(sab)],[36])).
% 0.14/0.34  tff(38,plain,
% 0.14/0.34      (![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[37, 33])).
% 0.14/0.34  tff(39,plain,
% 0.14/0.34      ((~![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))) | (union(union(intersection(B!3, C!2), difference(C!2, B!3)), difference(B!3, C!2)) = union(intersection(B!3, C!2), union(difference(C!2, B!3), difference(B!3, C!2))))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(40,plain,
% 0.14/0.34      (union(union(intersection(B!3, C!2), difference(C!2, B!3)), difference(B!3, C!2)) = union(intersection(B!3, C!2), union(difference(C!2, B!3), difference(B!3, C!2)))),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[39, 38])).
% 0.14/0.34  tff(41,plain,
% 0.14/0.34      (^[B: $i, C: $i] : refl((intersection(B, C) = intersection(C, B)) <=> (intersection(B, C) = intersection(C, B)))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(42,plain,
% 0.14/0.34      (![B: $i, C: $i] : (intersection(B, C) = intersection(C, B)) <=> ![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))),
% 0.14/0.34      inference(quant_intro,[status(thm)],[41])).
% 0.14/0.34  tff(43,plain,
% 0.14/0.34      (![B: $i, C: $i] : (intersection(B, C) = intersection(C, B)) <=> ![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(44,axiom,(![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','commutativity_of_intersection')).
% 0.14/0.34  tff(45,plain,
% 0.14/0.34      (![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[44, 43])).
% 0.14/0.34  tff(46,plain,(
% 0.14/0.34      ![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))),
% 0.14/0.34      inference(skolemize,[status(sab)],[45])).
% 0.14/0.34  tff(47,plain,
% 0.14/0.34      (![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[46, 42])).
% 0.14/0.34  tff(48,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (intersection(B, C) = intersection(C, B))) | (intersection(C!2, B!3) = intersection(B!3, C!2))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(49,plain,
% 0.14/0.34      (intersection(C!2, B!3) = intersection(B!3, C!2)),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[48, 47])).
% 0.14/0.34  tff(50,plain,
% 0.14/0.34      (intersection(B!3, C!2) = intersection(C!2, B!3)),
% 0.14/0.34      inference(symmetry,[status(thm)],[49])).
% 0.14/0.34  tff(51,plain,
% 0.14/0.34      (union(C!2, intersection(B!3, C!2)) = union(C!2, intersection(C!2, B!3))),
% 0.14/0.34      inference(monotonicity,[status(thm)],[50])).
% 0.14/0.34  tff(52,plain,
% 0.14/0.34      (union(C!2, intersection(C!2, B!3)) = union(C!2, intersection(B!3, C!2))),
% 0.14/0.34      inference(symmetry,[status(thm)],[51])).
% 0.14/0.34  tff(53,plain,
% 0.14/0.34      (^[B: $i, C: $i] : refl((union(B, intersection(B, C)) = B) <=> (union(B, intersection(B, C)) = B))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(54,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, intersection(B, C)) = B) <=> ![B: $i, C: $i] : (union(B, intersection(B, C)) = B)),
% 0.14/0.34      inference(quant_intro,[status(thm)],[53])).
% 0.14/0.34  tff(55,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, intersection(B, C)) = B) <=> ![B: $i, C: $i] : (union(B, intersection(B, C)) = B)),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(56,axiom,(![B: $i, C: $i] : (union(B, intersection(B, C)) = B)), file('/export/starexec/sandbox/benchmark/theBenchmark.p','union_intersection')).
% 0.14/0.34  tff(57,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, intersection(B, C)) = B)),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[56, 55])).
% 0.14/0.34  tff(58,plain,(
% 0.14/0.34      ![B: $i, C: $i] : (union(B, intersection(B, C)) = B)),
% 0.14/0.34      inference(skolemize,[status(sab)],[57])).
% 0.14/0.34  tff(59,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(B, intersection(B, C)) = B)),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[58, 54])).
% 0.14/0.34  tff(60,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (union(B, intersection(B, C)) = B)) | (union(C!2, intersection(C!2, B!3)) = C!2)),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(61,plain,
% 0.14/0.34      (union(C!2, intersection(C!2, B!3)) = C!2),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[60, 59])).
% 0.14/0.34  tff(62,plain,
% 0.14/0.34      (C!2 = union(C!2, intersection(C!2, B!3))),
% 0.14/0.34      inference(symmetry,[status(thm)],[61])).
% 0.14/0.34  tff(63,plain,
% 0.14/0.34      (^[B: $i, C: $i] : refl((union(intersection(B, C), difference(B, C)) = B) <=> (union(intersection(B, C), difference(B, C)) = B))),
% 0.14/0.34      inference(bind,[status(th)],[])).
% 0.14/0.34  tff(64,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B) <=> ![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)),
% 0.14/0.34      inference(quant_intro,[status(thm)],[63])).
% 0.14/0.34  tff(65,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B) <=> ![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(66,axiom,(![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)), file('/export/starexec/sandbox/benchmark/theBenchmark.p','union_intersection_difference')).
% 0.14/0.34  tff(67,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[66, 65])).
% 0.14/0.34  tff(68,plain,(
% 0.14/0.34      ![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)),
% 0.14/0.34      inference(skolemize,[status(sab)],[67])).
% 0.14/0.34  tff(69,plain,
% 0.14/0.34      (![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[68, 64])).
% 0.14/0.34  tff(70,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)) | (union(intersection(C!2, B!3), difference(C!2, B!3)) = C!2)),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(71,plain,
% 0.14/0.34      (union(intersection(C!2, B!3), difference(C!2, B!3)) = C!2),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[70, 69])).
% 0.14/0.34  tff(72,plain,
% 0.14/0.34      (union(intersection(B!3, C!2), difference(C!2, B!3)) = union(intersection(C!2, B!3), difference(C!2, B!3))),
% 0.14/0.34      inference(monotonicity,[status(thm)],[50])).
% 0.14/0.34  tff(73,plain,
% 0.14/0.34      (union(intersection(B!3, C!2), difference(C!2, B!3)) = union(C!2, intersection(B!3, C!2))),
% 0.14/0.34      inference(transitivity,[status(thm)],[72, 71, 62, 52])).
% 0.14/0.34  tff(74,plain,
% 0.14/0.34      (union(union(intersection(B!3, C!2), difference(C!2, B!3)), difference(B!3, C!2)) = union(union(C!2, intersection(B!3, C!2)), difference(B!3, C!2))),
% 0.14/0.34      inference(monotonicity,[status(thm)],[73])).
% 0.14/0.34  tff(75,plain,
% 0.14/0.34      (union(union(C!2, intersection(B!3, C!2)), difference(B!3, C!2)) = union(union(intersection(B!3, C!2), difference(C!2, B!3)), difference(B!3, C!2))),
% 0.14/0.34      inference(symmetry,[status(thm)],[74])).
% 0.14/0.34  tff(76,plain,
% 0.14/0.34      ((~![B: $i, C: $i, D: $i] : (union(union(B, C), D) = union(B, union(C, D)))) | (union(union(C!2, intersection(B!3, C!2)), difference(B!3, C!2)) = union(C!2, union(intersection(B!3, C!2), difference(B!3, C!2))))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(77,plain,
% 0.14/0.34      (union(union(C!2, intersection(B!3, C!2)), difference(B!3, C!2)) = union(C!2, union(intersection(B!3, C!2), difference(B!3, C!2)))),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[76, 38])).
% 0.14/0.34  tff(78,plain,
% 0.14/0.34      (union(C!2, union(intersection(B!3, C!2), difference(B!3, C!2))) = union(union(C!2, intersection(B!3, C!2)), difference(B!3, C!2))),
% 0.14/0.34      inference(symmetry,[status(thm)],[77])).
% 0.14/0.34  tff(79,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (union(intersection(B, C), difference(B, C)) = B)) | (union(intersection(B!3, C!2), difference(B!3, C!2)) = B!3)),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(80,plain,
% 0.14/0.34      (union(intersection(B!3, C!2), difference(B!3, C!2)) = B!3),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[79, 69])).
% 0.14/0.34  tff(81,plain,
% 0.14/0.34      (union(C!2, union(intersection(B!3, C!2), difference(B!3, C!2))) = union(C!2, B!3)),
% 0.14/0.34      inference(monotonicity,[status(thm)],[80])).
% 0.14/0.34  tff(82,plain,
% 0.14/0.34      (union(C!2, B!3) = union(C!2, union(intersection(B!3, C!2), difference(B!3, C!2)))),
% 0.14/0.34      inference(symmetry,[status(thm)],[81])).
% 0.14/0.34  tff(83,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (union(B, C) = union(C, B))) | (union(C!2, B!3) = union(B!3, C!2))),
% 0.14/0.34      inference(quant_inst,[status(thm)],[])).
% 0.14/0.34  tff(84,plain,
% 0.14/0.34      (union(C!2, B!3) = union(B!3, C!2)),
% 0.14/0.34      inference(unit_resolution,[status(thm)],[83, 7])).
% 0.14/0.34  tff(85,plain,
% 0.14/0.34      (union(B!3, C!2) = union(C!2, B!3)),
% 0.14/0.34      inference(symmetry,[status(thm)],[84])).
% 0.14/0.34  tff(86,plain,
% 0.14/0.34      (union(B!3, C!2) = union(symmetric_difference(B!3, C!2), intersection(B!3, C!2))),
% 0.14/0.34      inference(transitivity,[status(thm)],[85, 82, 78, 75, 40, 31, 9])).
% 0.14/0.34  tff(87,plain,
% 0.14/0.34      ((~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))) <=> (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C))))),
% 0.14/0.34      inference(rewrite,[status(thm)],[])).
% 0.14/0.34  tff(88,axiom,(~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))), file('/export/starexec/sandbox/benchmark/theBenchmark.p','prove_th95')).
% 0.14/0.34  tff(89,plain,
% 0.14/0.34      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[88, 87])).
% 0.14/0.34  tff(90,plain,
% 0.14/0.34      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[89, 87])).
% 0.14/0.34  tff(91,plain,
% 0.14/0.34      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[90, 87])).
% 0.14/0.34  tff(92,plain,
% 0.14/0.34      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[91, 87])).
% 0.14/0.34  tff(93,plain,
% 0.14/0.34      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.34      inference(modus_ponens,[status(thm)],[92, 87])).
% 0.14/0.35  tff(94,plain,
% 0.14/0.35      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.35      inference(modus_ponens,[status(thm)],[93, 87])).
% 0.14/0.35  tff(95,plain,
% 0.14/0.35      (~![B: $i, C: $i] : (union(B, C) = union(symmetric_difference(B, C), intersection(B, C)))),
% 0.14/0.35      inference(modus_ponens,[status(thm)],[94, 87])).
% 0.14/0.35  tff(96,plain,(
% 0.14/0.35      ~(union(B!3, C!2) = union(symmetric_difference(B!3, C!2), intersection(B!3, C!2)))),
% 0.14/0.35      inference(skolemize,[status(sab)],[95])).
% 0.14/0.35  tff(97,plain,
% 0.14/0.35      ($false),
% 0.14/0.35      inference(unit_resolution,[status(thm)],[96, 86])).
% 0.14/0.35  % SZS output end Proof
%------------------------------------------------------------------------------