TSTP Solution File: SWV266-2 by Twee---2.4.2
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% File : Twee---2.4.2
% Problem : SWV266-2 : TPTP v8.1.2. Released v3.2.0.
% 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 : n031.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 23:03:19 EDT 2023
% Result : Unsatisfiable 0.21s 0.39s
% Output : Proof 0.21s
% Verified :
% SZS Type : -
% Comments :
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%----WARNING: Could not form TPTP format derivation
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%----ORIGINAL SYSTEM OUTPUT
% 0.13/0.13 % Problem : SWV266-2 : TPTP v8.1.2. Released v3.2.0.
% 0.13/0.14 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% 0.14/0.35 % Computer : n031.cluster.edu
% 0.14/0.35 % Model : x86_64 x86_64
% 0.14/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.35 % Memory : 8042.1875MB
% 0.14/0.35 % OS : Linux 3.10.0-693.el7.x86_64
% 0.14/0.35 % CPULimit : 300
% 0.14/0.35 % WCLimit : 300
% 0.14/0.35 % DateTime : Tue Aug 29 06:22:10 EDT 2023
% 0.14/0.36 % CPUTime :
% 0.21/0.39 Command-line arguments: --no-flatten-goal
% 0.21/0.39
% 0.21/0.39 % SZS status Unsatisfiable
% 0.21/0.39
% 0.21/0.39 % SZS output start Proof
% 0.21/0.39 Take the following subset of the input axioms:
% 0.21/0.39 fof(cls_Message_Oparts_OBody_0, axiom, ![V_K, V_X, V_H]: (~c_in(c_Message_Omsg_OCrypt(V_K, V_X), c_Message_Oparts(V_H), tc_Message_Omsg) | c_in(V_X, c_Message_Oparts(V_H), tc_Message_Omsg))).
% 0.21/0.39 fof(cls_conjecture_2, negated_conjecture, c_in(c_Message_Omsg_OCrypt(v_K, v_X), c_Message_Oparts(v_H), tc_Message_Omsg)).
% 0.21/0.39 fof(cls_conjecture_3, negated_conjecture, ~c_in(v_X, c_Message_Oparts(v_H), tc_Message_Omsg)).
% 0.21/0.39
% 0.21/0.39 Now clausify the problem and encode Horn clauses using encoding 3 of
% 0.21/0.39 http://www.cse.chalmers.se/~nicsma/papers/horn.pdf.
% 0.21/0.39 We repeatedly replace C & s=t => u=v by the two clauses:
% 0.21/0.39 fresh(y, y, x1...xn) = u
% 0.21/0.39 C => fresh(s, t, x1...xn) = v
% 0.21/0.39 where fresh is a fresh function symbol and x1..xn are the free
% 0.21/0.39 variables of u and v.
% 0.21/0.39 A predicate p(X) is encoded as p(X)=true (this is sound, because the
% 0.21/0.39 input problem has no model of domain size 1).
% 0.21/0.39
% 0.21/0.39 The encoding turns the above axioms into the following unit equations and goals:
% 0.21/0.39
% 0.21/0.39 Axiom 1 (cls_Message_Oparts_OBody_0): fresh(X, X, Y, Z) = true.
% 0.21/0.39 Axiom 2 (cls_conjecture_2): c_in(c_Message_Omsg_OCrypt(v_K, v_X), c_Message_Oparts(v_H), tc_Message_Omsg) = true.
% 0.21/0.39 Axiom 3 (cls_Message_Oparts_OBody_0): fresh(c_in(c_Message_Omsg_OCrypt(X, Y), c_Message_Oparts(Z), tc_Message_Omsg), true, Y, Z) = c_in(Y, c_Message_Oparts(Z), tc_Message_Omsg).
% 0.21/0.39
% 0.21/0.39 Goal 1 (cls_conjecture_3): c_in(v_X, c_Message_Oparts(v_H), tc_Message_Omsg) = true.
% 0.21/0.39 Proof:
% 0.21/0.39 c_in(v_X, c_Message_Oparts(v_H), tc_Message_Omsg)
% 0.21/0.39 = { by axiom 3 (cls_Message_Oparts_OBody_0) R->L }
% 0.21/0.39 fresh(c_in(c_Message_Omsg_OCrypt(v_K, v_X), c_Message_Oparts(v_H), tc_Message_Omsg), true, v_X, v_H)
% 0.21/0.39 = { by axiom 2 (cls_conjecture_2) }
% 0.21/0.39 fresh(true, true, v_X, v_H)
% 0.21/0.39 = { by axiom 1 (cls_Message_Oparts_OBody_0) }
% 0.21/0.39 true
% 0.21/0.39 % SZS output end Proof
% 0.21/0.39
% 0.21/0.39 RESULT: Unsatisfiable (the axioms are contradictory).
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