%------------------------------------------------------------------------------
% File     : Twee---2.4.2
% Problem  : GRP143-1 : TPTP v8.1.2. Bugfixed v1.2.1.
% 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 : n012.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 01:17:20 EDT 2023

% Result   : Unsatisfiable 0.15s 0.41s
% Output   : Proof 0.15s
% Verified : 
% SZS Type : -

% Comments : 
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%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.14  % Problem  : GRP143-1 : TPTP v8.1.2. Bugfixed v1.2.1.
% 0.14/0.15  % Command  : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% 0.15/0.37  % Computer : n012.cluster.edu
% 0.15/0.37  % Model    : x86_64 x86_64
% 0.15/0.37  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.37  % Memory   : 8042.1875MB
% 0.15/0.37  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.15/0.37  % CPULimit : 300
% 0.15/0.37  % WCLimit  : 300
% 0.15/0.37  % DateTime : Mon Aug 28 19:40:54 EDT 2023
% 0.15/0.37  % CPUTime  : 
% 0.15/0.41  Command-line arguments: --set-join --lhs-weight 1 --no-flatten-goal --complete-subsets --goal-heuristic
% 0.15/0.41  
% 0.15/0.41  % SZS status Unsatisfiable
% 0.15/0.41  
% 0.15/0.41  % SZS output start Proof
% 0.15/0.41  Axiom 1 (idempotence_of_gld): greatest_lower_bound(X, X) = X.
% 0.15/0.41  Axiom 2 (symmetry_of_glb): greatest_lower_bound(X, Y) = greatest_lower_bound(Y, X).
% 0.15/0.41  Axiom 3 (associativity_of_glb): greatest_lower_bound(X, greatest_lower_bound(Y, Z)) = greatest_lower_bound(greatest_lower_bound(X, Y), Z).
% 0.15/0.41  
% 0.15/0.41  Goal 1 (prove_ax_glb2b): greatest_lower_bound(greatest_lower_bound(a, b), a) = greatest_lower_bound(a, b).
% 0.15/0.41  Proof:
% 0.15/0.41    greatest_lower_bound(greatest_lower_bound(a, b), a)
% 0.15/0.41  = { by axiom 2 (symmetry_of_glb) }
% 0.15/0.41    greatest_lower_bound(a, greatest_lower_bound(a, b))
% 0.15/0.41  = { by axiom 3 (associativity_of_glb) }
% 0.15/0.41    greatest_lower_bound(greatest_lower_bound(a, a), b)
% 0.15/0.41  = { by axiom 1 (idempotence_of_gld) }
% 0.15/0.41    greatest_lower_bound(a, b)
% 0.15/0.41  % SZS output end Proof
% 0.15/0.41  
% 0.15/0.41  RESULT: Unsatisfiable (the axioms are contradictory).
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