%------------------------------------------------------------------------------
% File : SOS---2.0
% Problem : SET077-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm : none
% Format : tptp:raw
% Command : sos-script %s
% Computer : n003.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 : 600s
% DateTime : Tue Jul 19 05:15:25 EDT 2022
% Result : Unsatisfiable 0.12s 0.36s
% Output : Refutation 0.12s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.07/0.12 % Problem : SET077-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.07/0.13 % Command : sos-script %s
% 0.12/0.34 % Computer : n003.cluster.edu
% 0.12/0.34 % Model : x86_64 x86_64
% 0.12/0.34 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.34 % Memory : 8042.1875MB
% 0.12/0.34 % OS : Linux 3.10.0-693.el7.x86_64
% 0.12/0.34 % CPULimit : 300
% 0.12/0.34 % WCLimit : 600
% 0.12/0.34 % DateTime : Sun Jul 10 04:20:59 EDT 2022
% 0.12/0.34 % CPUTime :
% 0.12/0.36
% 0.12/0.36 -------- PROOF --------
% 0.12/0.36 % SZS status Unsatisfiable
% 0.12/0.36 % SZS output start Refutation
% 0.12/0.36 ----- Otter 3.2, August 2001 -----
% 0.12/0.36 The process was started by sandbox on n003.cluster.edu,
% 0.12/0.36 Sun Jul 10 04:20:59 2022
% 0.12/0.36 The command was "./sos". The process ID is 19535.
% 0.12/0.36
% 0.12/0.36 set(prolog_style_variables).
% 0.12/0.36 set(auto).
% 0.12/0.36 dependent: set(auto1).
% 0.12/0.36 dependent: set(process_input).
% 0.12/0.36 dependent: clear(print_kept).
% 0.12/0.36 dependent: clear(print_new_demod).
% 0.12/0.36 dependent: clear(print_back_demod).
% 0.12/0.36 dependent: clear(print_back_sub).
% 0.12/0.36 dependent: set(control_memory).
% 0.12/0.36 dependent: assign(max_mem, 12000).
% 0.12/0.36 dependent: assign(pick_given_ratio, 4).
% 0.12/0.36 dependent: assign(stats_level, 1).
% 0.12/0.36 dependent: assign(pick_semantic_ratio, 3).
% 0.12/0.36 dependent: assign(sos_limit, 5000).
% 0.12/0.36 dependent: assign(max_weight, 60).
% 0.12/0.36 clear(print_given).
% 0.12/0.36
% 0.12/0.36 list(usable).
% 0.12/0.36
% 0.12/0.36 SCAN INPUT: prop=0, horn=0, equality=1, symmetry=0, max_lits=5.
% 0.12/0.36
% 0.12/0.36 This ia a non-Horn set with equality. The strategy will be
% 0.12/0.36 Knuth-Bendix, ordered hyper_res, ur_res, factoring, and
% 0.12/0.36 unit deletion, with positive clauses in sos and nonpositive
% 0.12/0.37 clauses in usable.
% 0.12/0.37
% 0.12/0.37 dependent: set(knuth_bendix).
% 0.12/0.37 dependent: set(para_from).
% 0.12/0.37 dependent: set(para_into).
% 0.12/0.37 dependent: clear(para_from_right).
% 0.12/0.37 dependent: clear(para_into_right).
% 0.12/0.37 dependent: set(para_from_vars).
% 0.12/0.37 dependent: set(eq_units_both_ways).
% 0.12/0.37 dependent: set(dynamic_demod_all).
% 0.12/0.37 dependent: set(dynamic_demod).
% 0.12/0.37 dependent: set(order_eq).
% 0.12/0.37 dependent: set(back_demod).
% 0.12/0.37 dependent: set(lrpo).
% 0.12/0.37 dependent: set(hyper_res).
% 0.12/0.37 dependent: set(unit_deletion).
% 0.12/0.37 dependent: set(factor).
% 0.12/0.37
% 0.12/0.37 ------------> process usable:
% 0.12/0.37
% 0.12/0.37 ------------> process sos:
% 0.12/0.37
% 0.12/0.37 ----> UNIT CONFLICT at 0.01 sec ----> 171 [binary,170.1,90.1] {-} $F.
% 0.12/0.37
% 0.12/0.37 Length of proof is 2. Level of proof is 2.
% 0.12/0.37
% 0.12/0.37 ---------------- PROOF ----------------
% 0.12/0.37 % SZS status Unsatisfiable
% 0.12/0.37 % SZS output start Refutation
% 0.12/0.37
% 0.12/0.37 77 [] {-} -member(singleton(x),universal_class).
% 0.12/0.37 90 [] {-} member(unordered_pair(A,B),universal_class).
% 0.12/0.37 91 [] {-} unordered_pair(A,A)=singleton(A).
% 0.12/0.37 93,92 [copy,91,flip.1] {-} singleton(A)=unordered_pair(A,A).
% 0.12/0.37 170 [back_demod,77,demod,93] {-} -member(unordered_pair(x,x),universal_class).
% 0.12/0.37 171 [binary,170.1,90.1] {-} $F.
% 0.12/0.37
% 0.12/0.37 % SZS output end Refutation
% 0.12/0.37 ------------ end of proof -------------
% 0.12/0.37
% 0.12/0.37
% 0.12/0.37 Search stopped by max_proofs option.
% 0.12/0.37
% 0.12/0.37
% 0.12/0.37 Search stopped by max_proofs option.
% 0.12/0.37
% 0.12/0.37 ============ end of search ============
% 0.12/0.37
% 0.12/0.37 That finishes the proof of the theorem.
% 0.12/0.37
% 0.12/0.37 Process 19535 finished Sun Jul 10 04:20:59 2022
%------------------------------------------------------------------------------