%------------------------------------------------------------------------------
% File : Vampire-SAT---5.0.1
% Problem : DAT334_8 : TPTP v9.3.1. Released v8.2.0.
% Transfm : none
% Format : tptp:raw
% Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 SAT
% Computer : n020.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8046.5625MB
% OS : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Tue Sep 29 09:48:32 AM UTC 2026
% Result : Theorem 0.25s 0.31s
% Output : Refutation 0.25s
% Verified :
% SZS Type : Refutation
% Derivation depth : 8
% Number of leaves : 2
% Syntax : Number of formulae : 15 ( 4 unt; 0 typ; 0 def)
% Number of atoms : 69 ( 0 equ)
% Maximal formula atoms : 6 ( 4 avg)
% Number of connectives : 42 ( 15 ~; 8 |; 16 &)
% ( 0 <=>; 3 =>; 0 <=; 0 <~>)
% Maximal formula depth : 8 ( 4 avg)
% Maximal term depth : 2 ( 1 avg)
% Number of FOOLs : 27 ( 27 fml; 0 var)
% Number of types : 3 ( 1 usr)
% Number of type conns : 0 ( 0 >; 0 *; 0 +; 0 <<)
% Number of predicates : 10 ( 9 usr; 7 prp; 0-3 aty)
% Number of functors : 4 ( 4 usr; 2 con; 0-1 aty)
% Number of variables : 15 ( 10 !; 5 ?; 15 :)
% Comments :
%------------------------------------------------------------------------------
tff(type_def_5,type,
'$ki_world': $tType ).
tff(func_def_0,type,
'$ki_local_world': '$ki_world' ).
tff(func_def_7,type,
sK0: '$ki_world' > $i ).
tff(func_def_8,type,
sK1: '$ki_world' > $i ).
tff(func_def_9,type,
sK2: '$ki_world' ).
tff(pred_def_1,type,
'$ki_accessible': ( '$ki_world' * '$ki_world' ) > $o ).
tff(pred_def_2,type,
teach: ( '$ki_world' * $i * $i ) > $o ).
tff(pred_def_3,type,
'$ki_exists_in_world_$i': ( '$ki_world' * $i ) > $o ).
tff(f3,axiom,
! [X0: '$ki_world'] :
( '$ki_accessible'('$ki_local_world',X0)
=> ( teach(X0,john,math)
& ? [X1: $i] :
( '$ki_exists_in_world_$i'(X0,X1)
& teach(X0,X1,cs) )
& teach(X0,mary,psych)
& teach(X0,sue,psych) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',db) ).
tff(f4,conjecture,
! [X0: '$ki_world'] :
( '$ki_accessible'('$ki_local_world',X0)
=> ? [X1: $i] :
( '$ki_exists_in_world_$i'(X0,X1)
& teach(X0,X1,cs) ) ),
file('/export/starexec/sandbox/benchmark/theBenchmark.p',verify) ).
tff(f5,negated_conjecture,
~ ! [X0: '$ki_world'] :
( '$ki_accessible'('$ki_local_world',X0)
=> ? [X1: $i] :
( '$ki_exists_in_world_$i'(X0,X1)
& teach(X0,X1,cs) ) ),
inference(negated_conjecture,[status(cth)],[f4]) ).
tff(f6,plain,
! [X0: '$ki_world'] :
( ( teach(X0,john,math)
& ? [X1: $i] :
( '$ki_exists_in_world_$i'(X0,X1)
& teach(X0,X1,cs) )
& teach(X0,mary,psych)
& teach(X0,sue,psych) )
| ~ '$ki_accessible'('$ki_local_world',X0) ),
inference(ennf_transformation,[],[f3]) ).
tff(f7,plain,
? [X0: '$ki_world'] :
( ! [X1: $i] :
( ~ '$ki_exists_in_world_$i'(X0,X1)
| ~ teach(X0,X1,cs) )
& '$ki_accessible'('$ki_local_world',X0) ),
inference(ennf_transformation,[],[f5]) ).
tff(f9,plain,
! [X0: '$ki_world'] :
( ( teach(X0,john,math)
& '$ki_exists_in_world_$i'(X0,sK1(X0))
& teach(X0,sK1(X0),cs)
& teach(X0,mary,psych)
& teach(X0,sue,psych) )
| ~ '$ki_accessible'('$ki_local_world',X0) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK1]),skolemize(X1,sK1(X0))],[f6]) ).
tff(f10,plain,
( ! [X1: $i] :
( ~ '$ki_exists_in_world_$i'(sK2,X1)
| ~ teach(sK2,X1,cs) )
& '$ki_accessible'('$ki_local_world',sK2) ),
inference(skolemize,[status(esa),new_symbols(skolem,[sK2]),skolemize(X0,sK2)],[f7]) ).
tff(f15,plain,
! [X0: '$ki_world'] :
( teach(X0,sK1(X0),cs)
| ~ '$ki_accessible'('$ki_local_world',X0) ),
inference(cnf_transformation,[],[f9]) ).
tff(f16,plain,
! [X0: '$ki_world'] :
( '$ki_exists_in_world_$i'(X0,sK1(X0))
| ~ '$ki_accessible'('$ki_local_world',X0) ),
inference(cnf_transformation,[],[f9]) ).
tff(f18,plain,
'$ki_accessible'('$ki_local_world',sK2),
inference(cnf_transformation,[],[f10]) ).
tff(f19,plain,
! [X1: $i] :
( ~ teach(sK2,X1,cs)
| ~ '$ki_exists_in_world_$i'(sK2,X1) ),
inference(cnf_transformation,[],[f10]) ).
tff(f20,plain,
( ~ '$ki_accessible'('$ki_local_world',sK2)
| ~ '$ki_exists_in_world_$i'(sK2,sK1(sK2)) ),
inference(resolution,[],[f15,f19]) ).
tff(f21,plain,
~ '$ki_exists_in_world_$i'(sK2,sK1(sK2)),
inference(forward_subsumption_resolution,[],[f20,f18]) ).
tff(f22,plain,
~ '$ki_accessible'('$ki_local_world',sK2),
inference(resolution,[],[f21,f16]) ).
tff(f23,plain,
$false,
inference(forward_subsumption_resolution,[],[f22,f18]) ).
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03 % Problem : DAT334_8 : TPTP v9.3.1. Released v8.2.0.
% 0.00/0.06 % Command : run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 SAT
% 0.10/0.22 % Computer : n020.cluster.edu
% 0.10/0.22 % Model : x86_64 x86_64
% 0.10/0.22 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.10/0.22 % Memory : 8046.5625MB
% 0.10/0.22 % OS : Linux 6.8.0-71-generic
% 0.10/0.22 % CPULimit : 300
% 0.10/0.22 % WCLimit : 300
% 0.10/0.22 % DateTime : Tue Sep 29 00:21:04 UTC 2026
% 0.10/0.23 % CPUTime :
% 0.10/0.23 Running run_vampire /export/starexec/sandbox/benchmark/theBenchmark.p 300 SAT
% 0.25/0.28 Running first-order model finding
% 0.25/0.28 Running: /export/starexec/sandbox/solver/bin/vampire-ho --input_syntax tptp --output_axiom_names on --mode casc --intent sat -m 16384 --cores 7 -t 300 /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.25/0.31 % (724020)Will run a generic schedule for satisfiability detection.
% 0.25/0.31 % (724028)dis+10_1_sil=32000:sp=arity:random_seed=1950232862:i=103:fgj=on_3000 on theBenchmark for (3000ds/103Mi)
% 0.25/0.31 % (724028) found proof, printing to "/export/starexec/sandbox/tmp/vampire-proof-724020-724028"...
% 0.25/0.31 % (724028)...printing done.
% 0.25/0.31 % (724028)Refutation found. Thanks to Tanya!
% 0.25/0.31 % SZS status Theorem for theBenchmark
% 0.25/0.31 % SZS output start Proof for theBenchmark
% See solution above
% 0.25/0.31 % (724028)------------------------------
% 0.25/0.31 % (724028)Version: Vampire 5.0.1 (Release build, commit 5ef7c2677 on 2026-07-16 16:54:09 +0200)
% 0.25/0.31 % (724028)Linked with Z3 4.14.0.0 3c47fd96cf5645d0c42b2c819d9e9a84380aa721 z3-4.8.4-9178-g3c47fd96c
% 0.25/0.31 % (724028)CaDiCaL version: 2.1.3
% 0.25/0.31 % (724028)Termination reason: Refutation
% 0.25/0.31 % (724028)Time elapsed: 0.001 s
% 0.25/0.31 % (724028)Peak memory usage: 11 MB
% 0.25/0.31 % (724028)Instructions burned: 1 (million)
% 0.25/0.31 % (724020)Success in time 0.024 s
% 0.25/0.31 % Vampire exiting
%------------------------------------------------------------------------------