0.10/0.12 % Problem : theBenchmark.p : TPTP v0.0.0. Released v0.0.0. 0.10/0.12 % Command : tptp2X_and_run_prover9 %d %s 0.11/0.33 % Computer : n006.cluster.edu 0.11/0.33 % Model : x86_64 x86_64 0.11/0.33 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 0.11/0.33 % Memory : 8042.1875MB 0.11/0.33 % OS : Linux 3.10.0-693.el7.x86_64 0.11/0.33 % CPULimit : 960 0.11/0.33 % DateTime : Thu Jul 2 06:56:00 EDT 2020 0.18/0.33 % CPUTime : 0.80/1.12 ============================== Prover9 =============================== 0.80/1.12 Prover9 (32) version 2009-11A, November 2009. 0.80/1.12 Process 18778 was started by sandbox2 on n006.cluster.edu, 0.80/1.12 Thu Jul 2 06:56:01 2020 0.80/1.12 The command was "/export/starexec/sandbox2/solver/bin/prover9 -t 960 -f /tmp/Prover9_18602_n006.cluster.edu". 0.80/1.12 ============================== end of head =========================== 0.80/1.12 0.80/1.12 ============================== INPUT ================================= 0.80/1.12 0.80/1.12 % Reading from file /tmp/Prover9_18602_n006.cluster.edu 0.80/1.12 0.80/1.12 set(prolog_style_variables). 0.80/1.12 set(auto2). 0.80/1.12 % set(auto2) -> set(auto). 0.80/1.12 % set(auto) -> set(auto_inference). 0.80/1.12 % set(auto) -> set(auto_setup). 0.80/1.12 % set(auto_setup) -> set(predicate_elim). 0.80/1.12 % set(auto_setup) -> assign(eq_defs, unfold). 0.80/1.12 % set(auto) -> set(auto_limits). 0.80/1.12 % set(auto_limits) -> assign(max_weight, "100.000"). 0.80/1.12 % set(auto_limits) -> assign(sos_limit, 20000). 0.80/1.12 % set(auto) -> set(auto_denials). 0.80/1.12 % set(auto) -> set(auto_process). 0.80/1.12 % set(auto2) -> assign(new_constants, 1). 0.80/1.12 % set(auto2) -> assign(fold_denial_max, 3). 0.80/1.12 % set(auto2) -> assign(max_weight, "200.000"). 0.80/1.12 % set(auto2) -> assign(max_hours, 1). 0.80/1.12 % assign(max_hours, 1) -> assign(max_seconds, 3600). 0.80/1.12 % set(auto2) -> assign(max_seconds, 0). 0.80/1.12 % set(auto2) -> assign(max_minutes, 5). 0.80/1.12 % assign(max_minutes, 5) -> assign(max_seconds, 300). 0.80/1.12 % set(auto2) -> set(sort_initial_sos). 0.80/1.12 % set(auto2) -> assign(sos_limit, -1). 0.80/1.12 % set(auto2) -> assign(lrs_ticks, 3000). 0.80/1.12 % set(auto2) -> assign(max_megs, 400). 0.80/1.12 % set(auto2) -> assign(stats, some). 0.80/1.12 % set(auto2) -> clear(echo_input). 0.80/1.12 % set(auto2) -> set(quiet). 0.80/1.12 % set(auto2) -> clear(print_initial_clauses). 0.80/1.12 % set(auto2) -> clear(print_given). 0.80/1.12 assign(lrs_ticks,-1). 0.80/1.12 assign(sos_limit,10000). 0.80/1.12 assign(order,kbo). 0.80/1.12 set(lex_order_vars). 0.80/1.12 clear(print_given). 0.80/1.12 0.80/1.12 % formulas(sos). % not echoed (88 formulas) 0.80/1.12 0.80/1.12 ============================== end of input ========================== 0.80/1.12 0.80/1.12 % From the command line: assign(max_seconds, 960). 0.80/1.12 0.80/1.12 ============================== PROCESS NON-CLAUSAL FORMULAS ========== 0.80/1.12 0.80/1.12 % Formulas that are not ordinary clauses: 0.80/1.12 1 (all X all Y is_a_theorem(implies(equiv(X,Y),implies(X,Y)))) <-> equivalence_1 # label(equivalence_1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 2 (all X all Y is_a_theorem(implies(Y,or(X,Y)))) <-> or_2 # label(or_2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 3 r3 <-> (all P all Q is_a_theorem(implies(or(P,Q),or(Q,P)))) # label(r3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 4 (all X all Y is_a_theorem(implies(X,implies(Y,and(X,Y))))) <-> and_3 # label(and_3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 5 or_3 <-> (all X all Y all Z is_a_theorem(implies(implies(X,Z),implies(implies(Y,Z),implies(or(X,Y),Z))))) # label(or_3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 6 r1 <-> (all P is_a_theorem(implies(or(P,P),P))) # label(r1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 7 (all X all Y is_a_theorem(implies(implies(not(Y),not(X)),implies(X,Y)))) <-> modus_tollens # label(modus_tollens) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 8 kn1 <-> (all P is_a_theorem(implies(P,and(P,P)))) # label(kn1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 9 cn2 <-> (all P all Q is_a_theorem(implies(P,implies(not(P),Q)))) # label(cn2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 10 kn2 <-> (all P all Q is_a_theorem(implies(and(P,Q),P))) # label(kn2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 11 implies_1 <-> (all X all Y is_a_theorem(implies(X,implies(Y,X)))) # label(implies_1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 12 (all X all Y (is_a_theorem(equiv(X,Y)) -> X = Y)) <-> substitution_of_equivalents # label(substitution_of_equivalents) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 13 (all X all Y is_a_theorem(implies(implies(X,Y),implies(implies(Y,X),equiv(X,Y))))) <-> equivalence_3 # label(equivalence_3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 14 kn3 <-> (all P all Q all R is_a_theorem(implies(implies(P,Q),implies(not(and(Q,R)),not(and(R,P)))))) # label(kn3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 15 (all P all Q is_a_theorem(implies(Q,or(P,Q)))) <-> r2 # label(r2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 16 implies_3 <-> (all X all Y all Z is_a_theorem(implies(implies(X,Y),implies(implies(Y,Z),implies(X,Z))))) # label(implies_3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 17 (all X all Y is_a_theorem(implies(X,or(X,Y)))) <-> or_1 # label(or_1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 18 (all P is_a_theorem(implies(implies(not(P),P),P))) <-> cn3 # label(cn3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 19 and_2 <-> (all X all Y is_a_theorem(implies(and(X,Y),Y))) # label(and_2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 20 (all P all Q all R is_a_theorem(implies(implies(P,Q),implies(implies(Q,R),implies(P,R))))) <-> cn1 # label(cn1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 21 (all X all Y is_a_theorem(implies(and(X,Y),X))) <-> and_1 # label(and_1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 22 (all X all Y is_a_theorem(implies(equiv(X,Y),implies(Y,X)))) <-> equivalence_2 # label(equivalence_2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 23 (all P all Q all R is_a_theorem(implies(or(P,or(Q,R)),or(Q,or(P,R))))) <-> r4 # label(r4) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 24 (all X all Y (is_a_theorem(X) & is_a_theorem(implies(X,Y)) -> is_a_theorem(Y))) <-> modus_ponens # label(modus_ponens) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 25 implies_2 <-> (all X all Y is_a_theorem(implies(implies(X,implies(X,Y)),implies(X,Y)))) # label(implies_2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 26 (all P all Q all R is_a_theorem(implies(implies(Q,R),implies(or(P,Q),or(P,R))))) <-> r5 # label(r5) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 27 op_and -> (all X all Y and(X,Y) = not(or(not(X),not(Y)))) # label(op_and) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 28 op_equiv -> (all X all Y and(implies(X,Y),implies(Y,X)) = equiv(X,Y)) # label(op_equiv) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 29 op_or -> (all X all Y or(X,Y) = not(and(not(X),not(Y)))) # label(op_or) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 30 op_implies_and -> (all X all Y not(and(X,not(Y))) = implies(X,Y)) # label(op_implies_and) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 31 op_implies_or -> (all X all Y or(not(X),Y) = implies(X,Y)) # label(op_implies_or) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 32 axiom_K <-> (all X all Y is_a_theorem(implies(necessarily(implies(X,Y)),implies(necessarily(X),necessarily(Y))))) # label(axiom_K) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 33 (all X is_a_theorem(implies(necessarily(X),necessarily(necessarily(X))))) <-> axiom_4 # label(axiom_4) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 34 (all P all Q is_a_theorem(strict_implies(possibly(and(P,Q)),and(possibly(P),possibly(Q))))) <-> axiom_s2 # label(axiom_s2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 35 (all X is_a_theorem(implies(necessarily(X),X))) <-> axiom_M # label(axiom_M) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 36 substitution_strict_equiv <-> (all X all Y (is_a_theorem(strict_equiv(X,Y)) -> X = Y)) # label(substitution_strict_equiv) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 37 adjunction <-> (all X all Y (is_a_theorem(Y) & is_a_theorem(X) -> is_a_theorem(and(X,Y)))) # label(adjunction) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 38 (all X is_a_theorem(strict_implies(necessarily(X),necessarily(necessarily(X))))) <-> axiom_s4 # label(axiom_s4) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 39 axiom_m1 <-> (all X all Y is_a_theorem(strict_implies(and(X,Y),and(Y,X)))) # label(axiom_m1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 40 axiom_m8 <-> (all P all Q is_a_theorem(strict_implies(strict_implies(P,Q),strict_implies(possibly(P),possibly(Q))))) # label(axiom_m8) # label(axiom) # label(non_clause). [assumption]. 0.80/1.12 41 (all X is_a_theorem(strict_implies(X,and(X,X)))) <-> axiom_m4 # label(axiom_m4) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 42 axiom_m2 <-> (all X all Y is_a_theorem(strict_implies(and(X,Y),X))) # label(axiom_m2) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 43 necessitation <-> (all X (is_a_theorem(X) -> is_a_theorem(necessarily(X)))) # label(necessitation) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 44 axiom_m7 <-> (all P all Q is_a_theorem(strict_implies(possibly(and(P,Q)),P))) # label(axiom_m7) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 45 (all X is_a_theorem(strict_implies(possibly(possibly(X)),possibly(X)))) <-> axiom_m9 # label(axiom_m9) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 46 axiom_s3 <-> (all X all Y is_a_theorem(strict_implies(strict_implies(X,Y),strict_implies(not(possibly(Y)),not(possibly(X)))))) # label(axiom_s3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 47 axiom_s1 <-> (all X all Y all Z is_a_theorem(implies(and(necessarily(implies(X,Y)),necessarily(implies(Y,Z))),necessarily(implies(X,Z))))) # label(axiom_s1) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 48 (all X is_a_theorem(implies(X,necessarily(possibly(X))))) <-> axiom_B # label(axiom_B) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 49 axiom_m6 <-> (all X is_a_theorem(strict_implies(X,possibly(X)))) # label(axiom_m6) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 50 axiom_m10 <-> (all X is_a_theorem(strict_implies(possibly(X),necessarily(possibly(X))))) # label(axiom_m10) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 51 (all X all Y all Z is_a_theorem(strict_implies(and(and(X,Y),Z),and(X,and(Y,Z))))) <-> axiom_m3 # label(axiom_m3) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 52 axiom_m5 <-> (all X all Y all Z is_a_theorem(strict_implies(and(strict_implies(X,Y),strict_implies(Y,Z)),strict_implies(X,Z)))) # label(axiom_m5) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 53 (all X is_a_theorem(implies(possibly(X),necessarily(possibly(X))))) <-> axiom_5 # label(axiom_5) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 54 modus_ponens_strict_implies <-> (all X all Y (is_a_theorem(strict_implies(X,Y)) & is_a_theorem(X) -> is_a_theorem(Y))) # label(modus_ponens_strict_implies) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 55 op_necessarily -> (all X necessarily(X) = not(possibly(not(X)))) # label(op_necessarily) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 56 op_strict_implies -> (all X all Y necessarily(implies(X,Y)) = strict_implies(X,Y)) # label(op_strict_implies) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 57 op_possibly -> (all X possibly(X) = not(necessarily(not(X)))) # label(op_possibly) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 58 op_strict_equiv -> (all X all Y and(strict_implies(X,Y),strict_implies(Y,X)) = strict_equiv(X,Y)) # label(op_strict_equiv) # label(axiom) # label(non_clause). [assumption]. 0.80/1.15 0.80/1.15 ============================== end of process non-clausal formulas === 0.80/1.15 0.80/1.15 ============================== PROCESS INITIAL CLAUSES =============== 0.80/1.15 0.80/1.15 ============================== PREDICATE ELIMINATION ================= 0.80/1.15 0.80/1.15 ============================== end predicate elimination ============= 0.80/1.15 0.80/1.15 Auto_denials: (non-Horn, no changes). 0.80/1.15 0.80/1.15 Term ordering decisions: 0.80/1.15 Function symbol KB weights: c1=1. c2=1. c3=1. c4=1. c5=1. c6=1. c7=1. c8=1. c9=1. c10=1. c11=1. c12=1. c13=1. c14=1. c15=1. c16=1. c17=1. c18=1. c19=1. c20=1. c21=1. c22=1. c23=1. c24=1. c25=1. c26=1. c27=1. c28=1. c29=1. c30=1. c31=1. c32=1. c33=1. c34=1. c35=1. c36=1. c37=1. c38=1. c39=1. c40=1. c41=1. c42=1. c43=1. c44=1. c45=1. c46=1. c47=1. c48=1. c49=1. c50=1. c51=1. c52=1. c53=1. c54=1. c55=1. c56=1. c57=1. c58=1. c59=1. c60=1. c61=1. c62=1. c63=1. c64=1. c65=1. c66=1. c67=1. c68=1. c69=1. c70=1. c71=1. c72=1. c73=1. c74=1. c75=1. c76=1. c77=1. c78=1. c79=1. c80=1. c81=1. c82=1. c83=1. c84=1. c85=1. c86=1. c87=1. c88=1. c89=1. c90=1. c91=1. c92=1. c93=1. c94=1. implies=1. and=1. strict_implies=1. or=1. equiv=1. strict_equiv=1. necessarily=1. possibly=1. not=1. 0.80/1.15 0.80/1.15 ============================== end of process initial clauses ======== 0.80/1.15 0.80/1.15 ============================== CLAUSES FOR SEARCH ==================== 3.74/4.05 3.74/4.05 ============================== end of clauses for search ============= 3.74/4.05 3.74/4.05 ============================== SEARCH ================================ 3.74/4.05 3.74/4.05 % Starting search at 0.04 seconds. 3.74/4.05 3.74/4.05 Low Water (keep): wt=27.000, iters=3341 3.74/4.05 3.74/4.05 Low Water (keep): wt=22.000, iters=3345 3.74/4.05 3.74/4.05 Low Water (keep): wt=21.000, iters=3341 3.74/4.05 3.74/4.05 Low Water (keep): wt=20.000, iters=3344 3.74/4.05 3.74/4.05 Low Water (keep): wt=19.000, iters=3408 3.74/4.05 3.74/4.05 Low Water (keep): wt=18.000, iters=3335 3.74/4.05 3.74/4.05 Low Water (keep): wt=17.000, iters=3375 3.74/4.05 3.74/4.05 Low Water (keep): wt=16.000, iters=3333 3.74/4.05 3.74/4.05 Low Water (keep): wt=15.000, iters=3349 3.74/4.05 3.74/4.05 Low Water (keep): wt=14.000, iters=3397 3.74/4.05 3.74/4.05 NOTE: Back_subsumption disabled, ratio of kept to back_subsumed is 33 (0.00 of 2.90 sec). 3.74/4.05 3.74/4.05 ============================== PROOF ================================= 3.74/4.05 % SZS status Theorem 3.74/4.05 % SZS output start Refutation 3.74/4.05 3.74/4.05 % Proof 1 at 2.93 (+ 0.01) seconds. 3.74/4.05 % Length of proof is 36. 3.74/4.05 % Level of proof is 8. 3.74/4.05 % Maximum clause weight is 12.000. 3.74/4.05 % Given clauses 514. 3.74/4.05 3.74/4.05 24 (all X all Y (is_a_theorem(X) & is_a_theorem(implies(X,Y)) -> is_a_theorem(Y))) <-> modus_ponens # label(modus_ponens) # label(axiom) # label(non_clause). [assumption]. 3.74/4.05 32 axiom_K <-> (all X all Y is_a_theorem(implies(necessarily(implies(X,Y)),implies(necessarily(X),necessarily(Y))))) # label(axiom_K) # label(axiom) # label(non_clause). [assumption]. 3.74/4.05 35 (all X is_a_theorem(implies(necessarily(X),X))) <-> axiom_M # label(axiom_M) # label(axiom) # label(non_clause). [assumption]. 3.74/4.05 43 necessitation <-> (all X (is_a_theorem(X) -> is_a_theorem(necessarily(X)))) # label(necessitation) # label(axiom) # label(non_clause). [assumption]. 3.74/4.05 54 modus_ponens_strict_implies <-> (all X all Y (is_a_theorem(strict_implies(X,Y)) & is_a_theorem(X) -> is_a_theorem(Y))) # label(modus_ponens_strict_implies) # label(axiom) # label(non_clause). [assumption]. 3.74/4.05 56 op_strict_implies -> (all X all Y necessarily(implies(X,Y)) = strict_implies(X,Y)) # label(op_strict_implies) # label(axiom) # label(non_clause). [assumption]. 3.74/4.05 109 -is_a_theorem(A) | -is_a_theorem(implies(A,B)) | is_a_theorem(B) | -modus_ponens # label(modus_ponens) # label(axiom). [clausify(24)]. 3.74/4.05 133 modus_ponens # label(hilbert_modus_ponens) # label(axiom). [assumption]. 3.74/4.05 137 -axiom_K | is_a_theorem(implies(necessarily(implies(A,B)),implies(necessarily(A),necessarily(B)))) # label(axiom_K) # label(axiom). [clausify(32)]. 3.74/4.05 144 is_a_theorem(implies(necessarily(A),A)) | -axiom_M # label(axiom_M) # label(axiom). [clausify(35)]. 3.74/4.05 162 -necessitation | -is_a_theorem(A) | is_a_theorem(necessarily(A)) # label(necessitation) # label(axiom). [clausify(43)]. 3.74/4.05 186 modus_ponens_strict_implies | is_a_theorem(strict_implies(c93,c94)) # label(modus_ponens_strict_implies) # label(axiom). [clausify(54)]. 3.74/4.05 187 modus_ponens_strict_implies | is_a_theorem(c93) # label(modus_ponens_strict_implies) # label(axiom). [clausify(54)]. 3.74/4.05 188 modus_ponens_strict_implies | -is_a_theorem(c94) # label(modus_ponens_strict_implies) # label(axiom). [clausify(54)]. 3.74/4.05 191 -op_strict_implies | strict_implies(A,B) = necessarily(implies(A,B)) # label(op_strict_implies) # label(axiom). [clausify(56)]. 3.74/4.05 192 -op_strict_implies | necessarily(implies(A,B)) = strict_implies(A,B). [copy(191),flip(b)]. 3.74/4.05 197 axiom_M # label(km5_axiom_M) # label(axiom). [assumption]. 3.74/4.05 198 necessitation # label(km5_necessitation) # label(axiom). [assumption]. 3.74/4.05 199 axiom_K # label(km5_axiom_K) # label(axiom). [assumption]. 3.74/4.05 204 op_strict_implies # label(s1_0_op_strict_implies) # label(axiom). [assumption]. 3.74/4.05 205 -modus_ponens_strict_implies # label(s1_0_modus_ponens_strict_implies) # label(negated_conjecture). [assumption]. 3.74/4.05 220 -is_a_theorem(A) | -is_a_theorem(implies(A,B)) | is_a_theorem(B). [back_unit_del(109),unit_del(d,133)]. 3.74/4.05 225 is_a_theorem(implies(necessarily(A),A)). [back_unit_del(144),unit_del(b,197)]. 3.74/4.05 226 -is_a_theorem(A) | is_a_theorem(necessarily(A)). [back_unit_del(162),unit_del(a,198)]. 3.74/4.05 227 is_a_theorem(implies(necessarily(implies(A,B)),implies(necessarily(A),necessarily(B)))). [back_unit_del(137),unit_del(a,199)]. 3.74/4.05 231 necessarily(implies(A,B)) = strict_implies(A,B). [back_unit_del(192),unit_del(a,204)]. 3.74/4.05 232 -is_a_theorem(c94). [back_unit_del(188),unit_del(a,205)]. 3.74/4.05 233 is_a_theorem(c93). [back_unit_del(187),unit_del(a,205)]. 3.74/4.05 234 is_a_theorem(strict_implies(c93,c94)). [back_unit_del(186),unit_del(a,205)]. 3.74/4.05 244 is_a_theorem(implies(strict_implies(A,B),implies(necessarily(A),necessarily(B)))). [back_rewrite(227),rewrite([231(2)])]. 3.74/4.05 318 -is_a_theorem(necessarily(A)) | is_a_theorem(A). [resolve(225,a,220,b)]. 3.74/4.05 352 is_a_theorem(necessarily(c93)). [resolve(233,a,226,a)]. 3.74/4.05 370 -is_a_theorem(strict_implies(A,B)) | is_a_theorem(implies(necessarily(A),necessarily(B))). [resolve(244,a,220,b)]. 3.74/4.05 9413 is_a_theorem(implies(necessarily(c93),necessarily(c94))). [resolve(370,a,234,a)]. 3.74/4.05 9441 is_a_theorem(necessarily(c94)). [resolve(9413,a,220,b),unit_del(a,352)]. 3.74/4.05 9455 $F. [resolve(9441,a,318,a),unit_del(a,232)]. 3.74/4.05 3.74/4.05 % SZS output end Refutation 3.74/4.05 ============================== end of proof ========================== 3.74/4.05 3.74/4.05 ============================== STATISTICS ============================ 3.74/4.05 3.74/4.05 Given=514. Generated=16396. Kept=9392. proofs=1. 3.74/4.05 Usable=497. Sos=8563. Demods=30. Limbo=11, Disabled=467. Hints=0. 3.74/4.05 Megabytes=12.03. 3.74/4.05 User_CPU=2.93, System_CPU=0.01, Wall_clock=3. 3.74/4.05 3.74/4.05 ============================== end of statistics ===================== 3.74/4.05 3.74/4.05 ============================== end of search ========================= 3.74/4.05 3.74/4.05 THEOREM PROVED 3.74/4.05 % SZS status Theorem 3.74/4.05 3.74/4.05 Exiting with 1 proof. 3.74/4.05 3.74/4.05 Process 18778 exit (max_proofs) Thu Jul 2 06:56:04 2020 3.74/4.06 Prover9 interrupted 3.74/4.06 EOF