%   ORIGINAL: h4/sorting/PERM__STRONG__IND
% Assm: HL_TRUTH: T
% Assm: HL_FALSITY: ~F
% Assm: HL_BOOL_CASES: !t. (t <=> T) \/ (t <=> F)
% Assm: HL_EXT: !f g. (!x. f x = g x) ==> f = g
% Assm: h4/bool/TRUTH: T
% Assm: h4/bool/CONJ__ASSOC: !t3 t2 t1. t1 /\ t2 /\ t3 <=> (t1 /\ t2) /\ t3
% Assm: h4/bool/EQ__SYM__EQ: !y x. x = y <=> y = x
% Assm: h4/bool/EQ__CLAUSES_c1: !t. (t <=> T) <=> t
% Assm: h4/bool/MONO__AND: !z y x w. (x ==> y) /\ (z ==> w) ==> x /\ z ==> y /\ w
% Assm: h4/sorting/PERM__TRANS: !z y x. h4/sorting/PERM x y /\ h4/sorting/PERM y z ==> h4/sorting/PERM x z
% Assm: h4/sorting/PERM__MONO: !x l2 l1. h4/sorting/PERM l1 l2 ==> h4/sorting/PERM (h4/list/CONS x l1) (h4/list/CONS x l2)
% Assm: h4/sorting/PERM__NIL_c1: !L. h4/sorting/PERM h4/list/NIL L <=> L = h4/list/NIL
% Assm: h4/sorting/PERM__IND: !P. P h4/list/NIL h4/list/NIL /\ (!x l1 l2. P l1 l2 ==> P (h4/list/CONS x l1) (h4/list/CONS x l2)) /\ (!x y l1 l2. P l1 l2 ==> P (h4/list/CONS x (h4/list/CONS y l1)) (h4/list/CONS y (h4/list/CONS x l2))) /\ (!l1 l2 l3. P l1 l2 /\ P l2 l3 ==> P l1 l3) ==> (!l1 l2. h4/sorting/PERM l1 l2 ==> P l1 l2)
% Assm: h4/sorting/PERM__SWAP__AT__FRONT: !y x l2 l1. h4/sorting/PERM (h4/list/CONS x (h4/list/CONS y l1)) (h4/list/CONS y (h4/list/CONS x l2)) <=> h4/sorting/PERM l1 l2
% Goal: !P. P h4/list/NIL h4/list/NIL /\ (!x l1 l2. h4/sorting/PERM l1 l2 /\ P l1 l2 ==> P (h4/list/CONS x l1) (h4/list/CONS x l2)) /\ (!x y l1 l2. h4/sorting/PERM l1 l2 /\ P l1 l2 ==> P (h4/list/CONS x (h4/list/CONS y l1)) (h4/list/CONS y (h4/list/CONS x l2))) /\ (!l1 l2 l3. h4/sorting/PERM l1 l2 /\ P l1 l2 /\ h4/sorting/PERM l2 l3 /\ P l2 l3 ==> P l1 l3) ==> (!l1 l2. h4/sorting/PERM l1 l2 ==> P l1 l2)
%   PROCESSED
% Assm [HLu_TRUTH]: T
% Assm [HLu_FALSITY]: ~F
% Assm [HLu_BOOLu_CASES]: !t. (t <=> T) \/ (t <=> F)
% Assm [HLu_EXT]: !f g. (!x. happ f x = happ g x) ==> f = g
% Assm [h4s_bools_TRUTH]: T
% Assm [h4s_bools_CONJu_u_ASSOC]: !t3 t2 t1. t1 /\ t2 /\ t3 <=> (t1 /\ t2) /\ t3
% Assm [h4s_bools_EQu_u_SYMu_u_EQ]: !y x. x = y <=> y = x
% Assm [h4s_bools_EQu_u_CLAUSESu_c1]: !t. (t <=> T) <=> t
% Assm [h4s_bools_MONOu_u_AND]: !z y x w. (x ==> y) /\ (z ==> w) ==> x /\ z ==> y /\ w
% Assm [h4s_sortings_PERMu_u_TRANS]: !z y x. h4/sorting/PERM x y /\ h4/sorting/PERM y z ==> h4/sorting/PERM x z
% Assm [h4s_sortings_PERMu_u_MONO]: !x l2 l1. h4/sorting/PERM l1 l2 ==> h4/sorting/PERM (h4/list/CONS x l1) (h4/list/CONS x l2)
% Assm [h4s_sortings_PERMu_u_NILu_c1]: !L. h4/sorting/PERM h4/list/NIL L <=> L = h4/list/NIL
% Assm [h4s_sortings_PERMu_u_IND]: !P. happ (happ P h4/list/NIL) h4/list/NIL /\ (!x l1 l2. happ (happ P l1) l2 ==> happ (happ P (h4/list/CONS x l1)) (h4/list/CONS x l2)) /\ (!x y l1 l2. happ (happ P l1) l2 ==> happ (happ P (h4/list/CONS x (h4/list/CONS y l1))) (h4/list/CONS y (h4/list/CONS x l2))) /\ (!l1 l2 l3. happ (happ P l1) l2 /\ happ (happ P l2) l3 ==> happ (happ P l1) l3) ==> (!l1 l2. h4/sorting/PERM l1 l2 ==> happ (happ P l1) l2)
% Assm [h4s_sortings_PERMu_u_SWAPu_u_ATu_u_FRONT]: !y x l2 l1. h4/sorting/PERM (h4/list/CONS x (h4/list/CONS y l1)) (h4/list/CONS y (h4/list/CONS x l2)) <=> h4/sorting/PERM l1 l2
% Goal: !P. happ (happ P h4/list/NIL) h4/list/NIL /\ (!x l1 l2. h4/sorting/PERM l1 l2 /\ happ (happ P l1) l2 ==> happ (happ P (h4/list/CONS x l1)) (h4/list/CONS x l2)) /\ (!x y l1 l2. h4/sorting/PERM l1 l2 /\ happ (happ P l1) l2 ==> happ (happ P (h4/list/CONS x (h4/list/CONS y l1))) (h4/list/CONS y (h4/list/CONS x l2))) /\ (!l1 l2 l3. h4/sorting/PERM l1 l2 /\ happ (happ P l1) l2 /\ h4/sorting/PERM l2 l3 /\ happ (happ P l2) l3 ==> happ (happ P l1) l3) ==> (!l1 l2. h4/sorting/PERM l1 l2 ==> happ (happ P l1) l2)
fof(aHLu_TRUTH, axiom, p(s(t_bool,t))).
fof(aHLu_FALSITY, axiom, ~ (p(s(t_bool,f)))).
fof(aHLu_BOOLu_CASES, axiom, ![V_t]: (s(t_bool,V_t) = s(t_bool,t) | s(t_bool,V_t) = s(t_bool,f))).
fof(aHLu_EXT, axiom, ![TV_Q275251,TV_Q275247]: ![V_f, V_g]: (![V_x]: s(TV_Q275247,happ(s(t_fun(TV_Q275251,TV_Q275247),V_f),s(TV_Q275251,V_x))) = s(TV_Q275247,happ(s(t_fun(TV_Q275251,TV_Q275247),V_g),s(TV_Q275251,V_x))) => s(t_fun(TV_Q275251,TV_Q275247),V_f) = s(t_fun(TV_Q275251,TV_Q275247),V_g))).
fof(ah4s_bools_TRUTH, axiom, p(s(t_bool,t))).
fof(ah4s_bools_CONJu_u_ASSOC, axiom, ![V_t3, V_t2, V_t1]: ((p(s(t_bool,V_t1)) & (p(s(t_bool,V_t2)) & p(s(t_bool,V_t3)))) <=> ((p(s(t_bool,V_t1)) & p(s(t_bool,V_t2))) & p(s(t_bool,V_t3))))).
fof(ah4s_bools_EQu_u_SYMu_u_EQ, axiom, ![TV_u_27a]: ![V_y, V_x]: (s(TV_u_27a,V_x) = s(TV_u_27a,V_y) <=> s(TV_u_27a,V_y) = s(TV_u_27a,V_x))).
fof(ah4s_bools_EQu_u_CLAUSESu_c1, axiom, ![V_t]: (s(t_bool,V_t) = s(t_bool,t) <=> p(s(t_bool,V_t)))).
fof(ah4s_bools_MONOu_u_AND, axiom, ![V_z, V_y, V_x, V_w]: (((p(s(t_bool,V_x)) => p(s(t_bool,V_y))) & (p(s(t_bool,V_z)) => p(s(t_bool,V_w)))) => ((p(s(t_bool,V_x)) & p(s(t_bool,V_z))) => (p(s(t_bool,V_y)) & p(s(t_bool,V_w)))))).
fof(ah4s_sortings_PERMu_u_TRANS, axiom, ![TV_u_27a]: ![V_z, V_y, V_x]: ((p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_x),s(t_h4s_lists_list(TV_u_27a),V_y)))) & p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_y),s(t_h4s_lists_list(TV_u_27a),V_z))))) => p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_x),s(t_h4s_lists_list(TV_u_27a),V_z)))))).
fof(ah4s_sortings_PERMu_u_MONO, axiom, ![TV_u_27a]: ![V_x, V_l2, V_l1]: (p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) => p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2)))))))).
fof(ah4s_sortings_PERMu_u_NILu_c1, axiom, ![TV_u_27a]: ![V_L]: (p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil),s(t_h4s_lists_list(TV_u_27a),V_L)))) <=> s(t_h4s_lists_list(TV_u_27a),V_L) = s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil))).
fof(ah4s_sortings_PERMu_u_IND, axiom, ![TV_u_27a]: ![V_P]: ((p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil)))) & (![V_x, V_l1, V_l2]: (p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2)))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l1))))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2))))))) & (![V_x, V_y, V_l1, V_l2]: (p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2)))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_y),s(t_h4s_lists_list(TV_u_27a),V_l1))))))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_y),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2))))))))) & ![V_l1, V_l2, V_l3]: ((p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2)))) & p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l2))),s(t_h4s_lists_list(TV_u_27a),V_l3))))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l3)))))))) => ![V_l1, V_l2]: (p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2))))))).
fof(ah4s_sortings_PERMu_u_SWAPu_u_ATu_u_FRONT, axiom, ![TV_u_27a]: ![V_y, V_x, V_l2, V_l1]: s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_y),s(t_h4s_lists_list(TV_u_27a),V_l1))))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_y),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2))))))) = s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))).
fof(ch4s_sortings_PERMu_u_STRONGu_u_IND, conjecture, ![TV_u_27a]: ![V_P]: ((p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil)))) & (![V_x, V_l1, V_l2]: ((p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) & p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2))))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l1))))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2))))))) & (![V_x, V_y, V_l1, V_l2]: ((p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) & p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2))))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_y),s(t_h4s_lists_list(TV_u_27a),V_l1))))))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_y),s(t_h4s_lists_list(TV_u_27a),h4s_lists_cons(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2))))))))) & ![V_l1, V_l2, V_l3]: ((p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) & (p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2)))) & (p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l2),s(t_h4s_lists_list(TV_u_27a),V_l3)))) & p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l2))),s(t_h4s_lists_list(TV_u_27a),V_l3))))))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l3)))))))) => ![V_l1, V_l2]: (p(s(t_bool,h4s_sortings_perm(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) => p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_fun(t_h4s_lists_list(TV_u_27a),t_bool)),V_P),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),V_l2))))))).
