%   ORIGINAL: h4/rich__list/IS__SUFFIX__APPEND
% 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/ETA__AX: !t. (\x. t x) = t
% Assm: h4/bool/TRUTH: T
% Assm: h4/bool/IMP__ANTISYM__AX: !t2 t1. (t1 ==> t2) ==> (t2 ==> t1) ==> (t1 <=> t2)
% Assm: h4/bool/FALSITY: !t. F ==> t
% Assm: h4/bool/FORALL__SIMP: !t. (!x. t) <=> t
% Assm: h4/bool/EXISTS__SIMP: !t. (?x. t) <=> t
% Assm: h4/bool/NOT__CLAUSES_c2: ~F <=> T
% Assm: h4/bool/EQ__SYM__EQ: !y x. x = y <=> y = x
% Assm: h4/bool/EQ__CLAUSES_c0: !t. (T <=> t) <=> t
% Assm: h4/bool/EQ__CLAUSES_c2: !t. (F <=> t) <=> ~t
% Assm: h4/list/NULL__EQ: !l. h4/list/NULL l <=> l = h4/list/NIL
% Assm: h4/list/APPEND__SNOC: !x l2 l1. h4/list/APPEND l1 (h4/list/SNOC x l2) = h4/list/SNOC x (h4/list/APPEND l1 l2)
% Assm: h4/list/SNOC__11: !y x b a. h4/list/SNOC x y = h4/list/SNOC a b <=> x = a /\ y = b
% Assm: h4/list/SNOC__INDUCT: !P. P h4/list/NIL /\ (!l. P l ==> (!x. P (h4/list/SNOC x l))) ==> (!l. P l)
% Assm: h4/rich__list/NOT__NULL__SNOC: !x l. ~h4/list/NULL (h4/list/SNOC x l)
% Assm: h4/rich__list/IS__SUFFIX0_c0: !l. h4/rich__list/IS__SUFFIX l h4/list/NIL <=> T
% Assm: h4/rich__list/IS__SUFFIX0_c1: !x l. h4/rich__list/IS__SUFFIX h4/list/NIL (h4/list/SNOC x l) <=> F
% Assm: h4/rich__list/IS__SUFFIX0_c2: !x2 x1 l2 l1. h4/rich__list/IS__SUFFIX (h4/list/SNOC x1 l1) (h4/list/SNOC x2 l2) <=> x1 = x2 /\ h4/rich__list/IS__SUFFIX l1 l2
% Assm: h4/rich__list/APPEND__NIL_c0: !l. h4/list/APPEND l h4/list/NIL = l
% Goal: !l2 l1. h4/rich__list/IS__SUFFIX l1 l2 <=> (?l. l1 = h4/list/APPEND l 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_ETAu_u_AX]: !t x. happ t x = happ t x
% Assm [h4s_bools_TRUTH]: T
% Assm [h4s_bools_IMPu_u_ANTISYMu_u_AX]: !t2 t1. (t1 ==> t2) ==> (t2 ==> t1) ==> (t1 <=> t2)
% Assm [h4s_bools_FALSITY]: !t. F ==> t
% Assm [h4s_bools_FORALLu_u_SIMP]: !t. (!x. t) <=> t
% Assm [h4s_bools_EXISTSu_u_SIMP]: !t. (?x. t) <=> t
% Assm [h4s_bools_NOTu_u_CLAUSESu_c2]: ~F <=> T
% Assm [h4s_bools_EQu_u_SYMu_u_EQ]: !y x. x = y <=> y = x
% Assm [h4s_bools_EQu_u_CLAUSESu_c0]: !t. (T <=> t) <=> t
% Assm [h4s_bools_EQu_u_CLAUSESu_c2]: !t. (F <=> t) <=> ~t
% Assm [h4s_lists_NULLu_u_EQ]: !l. h4/list/NULL l <=> l = h4/list/NIL
% Assm [h4s_lists_APPENDu_u_SNOC]: !x l2 l1. h4/list/APPEND l1 (h4/list/SNOC x l2) = h4/list/SNOC x (h4/list/APPEND l1 l2)
% Assm [h4s_lists_SNOCu_u_11]: !y x b a. h4/list/SNOC x y = h4/list/SNOC a b <=> x = a /\ y = b
% Assm [h4s_lists_SNOCu_u_INDUCT]: !P. happ P h4/list/NIL /\ (!l. happ P l ==> (!x. happ P (h4/list/SNOC x l))) ==> (!l. happ P l)
% Assm [h4s_richu_u_lists_NOTu_u_NULLu_u_SNOC]: !x l. ~h4/list/NULL (h4/list/SNOC x l)
% Assm [h4s_richu_u_lists_ISu_u_SUFFIX0u_c0]: !l. h4/rich__list/IS__SUFFIX l h4/list/NIL <=> T
% Assm [h4s_richu_u_lists_ISu_u_SUFFIX0u_c1]: !x l. h4/rich__list/IS__SUFFIX h4/list/NIL (h4/list/SNOC x l) <=> F
% Assm [h4s_richu_u_lists_ISu_u_SUFFIX0u_c2]: !x2 x1 l2 l1. h4/rich__list/IS__SUFFIX (h4/list/SNOC x1 l1) (h4/list/SNOC x2 l2) <=> x1 = x2 /\ h4/rich__list/IS__SUFFIX l1 l2
% Assm [h4s_richu_u_lists_APPENDu_u_NILu_c0]: !l. h4/list/APPEND l h4/list/NIL = l
% Goal: !l2 l1. h4/rich__list/IS__SUFFIX l1 l2 <=> (?l. l1 = h4/list/APPEND l 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_Q159008,TV_Q159004]: ![V_f, V_g]: (![V_x]: s(TV_Q159004,happ(s(t_fun(TV_Q159008,TV_Q159004),V_f),s(TV_Q159008,V_x))) = s(TV_Q159004,happ(s(t_fun(TV_Q159008,TV_Q159004),V_g),s(TV_Q159008,V_x))) => s(t_fun(TV_Q159008,TV_Q159004),V_f) = s(t_fun(TV_Q159008,TV_Q159004),V_g))).
fof(ah4s_bools_ETAu_u_AX, axiom, ![TV_u_27b,TV_u_27a]: ![V_t, V_x]: s(TV_u_27b,happ(s(t_fun(TV_u_27a,TV_u_27b),V_t),s(TV_u_27a,V_x))) = s(TV_u_27b,happ(s(t_fun(TV_u_27a,TV_u_27b),V_t),s(TV_u_27a,V_x)))).
fof(ah4s_bools_TRUTH, axiom, p(s(t_bool,t))).
fof(ah4s_bools_IMPu_u_ANTISYMu_u_AX, axiom, ![V_t2, V_t1]: ((p(s(t_bool,V_t1)) => p(s(t_bool,V_t2))) => ((p(s(t_bool,V_t2)) => p(s(t_bool,V_t1))) => s(t_bool,V_t1) = s(t_bool,V_t2)))).
fof(ah4s_bools_FALSITY, axiom, ![V_t]: (p(s(t_bool,f)) => p(s(t_bool,V_t)))).
fof(ah4s_bools_FORALLu_u_SIMP, axiom, ![TV_u_27a]: ![V_t]: (![V_x]: p(s(t_bool,V_t)) <=> p(s(t_bool,V_t)))).
fof(ah4s_bools_EXISTSu_u_SIMP, axiom, ![TV_u_27a]: ![V_t]: (?[V_x]: p(s(t_bool,V_t)) <=> p(s(t_bool,V_t)))).
fof(ah4s_bools_NOTu_u_CLAUSESu_c2, axiom, (~ (p(s(t_bool,f))) <=> p(s(t_bool,t)))).
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_c0, axiom, ![V_t]: (s(t_bool,t) = s(t_bool,V_t) <=> p(s(t_bool,V_t)))).
fof(ah4s_bools_EQu_u_CLAUSESu_c2, axiom, ![V_t]: (s(t_bool,f) = s(t_bool,V_t) <=> ~ (p(s(t_bool,V_t))))).
fof(ah4s_lists_NULLu_u_EQ, axiom, ![TV_u_27a]: ![V_l]: (p(s(t_bool,h4s_lists_null(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_lists_APPENDu_u_SNOC, axiom, ![TV_u_27a]: ![V_x, V_l2, V_l1]: s(t_h4s_lists_list(TV_u_27a),h4s_lists_append(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l2))))) = s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),h4s_lists_append(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))))).
fof(ah4s_lists_SNOCu_u_11, axiom, ![TV_u_27a]: ![V_y, V_x, V_b, V_a]: (s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_y))) = s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_a),s(t_h4s_lists_list(TV_u_27a),V_b))) <=> (s(TV_u_27a,V_x) = s(TV_u_27a,V_a) & s(t_h4s_lists_list(TV_u_27a),V_y) = s(t_h4s_lists_list(TV_u_27a),V_b)))).
fof(ah4s_lists_SNOCu_u_INDUCT, axiom, ![TV_u_27a]: ![V_P]: ((p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil)))) & ![V_l]: (p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),V_P),s(t_h4s_lists_list(TV_u_27a),V_l)))) => ![V_x]: p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),V_P),s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l)))))))) => ![V_l]: p(s(t_bool,happ(s(t_fun(t_h4s_lists_list(TV_u_27a),t_bool),V_P),s(t_h4s_lists_list(TV_u_27a),V_l)))))).
fof(ah4s_richu_u_lists_NOTu_u_NULLu_u_SNOC, axiom, ![TV_u_27a]: ![V_x, V_l]: ~ (p(s(t_bool,h4s_lists_null(s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l)))))))).
fof(ah4s_richu_u_lists_ISu_u_SUFFIX0u_c0, axiom, ![TV_u_27a]: ![V_l]: s(t_bool,h4s_richu_u_lists_isu_u_suffix(s(t_h4s_lists_list(TV_u_27a),V_l),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil))) = s(t_bool,t)).
fof(ah4s_richu_u_lists_ISu_u_SUFFIX0u_c1, axiom, ![TV_u_27a]: ![V_x, V_l]: s(t_bool,h4s_richu_u_lists_isu_u_suffix(s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil),s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x),s(t_h4s_lists_list(TV_u_27a),V_l))))) = s(t_bool,f)).
fof(ah4s_richu_u_lists_ISu_u_SUFFIX0u_c2, axiom, ![TV_u_27a]: ![V_x2, V_x1, V_l2, V_l1]: (p(s(t_bool,h4s_richu_u_lists_isu_u_suffix(s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x1),s(t_h4s_lists_list(TV_u_27a),V_l1))),s(t_h4s_lists_list(TV_u_27a),h4s_lists_snoc(s(TV_u_27a,V_x2),s(t_h4s_lists_list(TV_u_27a),V_l2)))))) <=> (s(TV_u_27a,V_x1) = s(TV_u_27a,V_x2) & p(s(t_bool,h4s_richu_u_lists_isu_u_suffix(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2))))))).
fof(ah4s_richu_u_lists_APPENDu_u_NILu_c0, axiom, ![TV_u_27a]: ![V_l]: s(t_h4s_lists_list(TV_u_27a),h4s_lists_append(s(t_h4s_lists_list(TV_u_27a),V_l),s(t_h4s_lists_list(TV_u_27a),h4s_lists_nil))) = s(t_h4s_lists_list(TV_u_27a),V_l)).
fof(ch4s_richu_u_lists_ISu_u_SUFFIXu_u_APPEND, conjecture, ![TV_u_27a]: ![V_l2, V_l1]: (p(s(t_bool,h4s_richu_u_lists_isu_u_suffix(s(t_h4s_lists_list(TV_u_27a),V_l1),s(t_h4s_lists_list(TV_u_27a),V_l2)))) <=> ?[V_l]: s(t_h4s_lists_list(TV_u_27a),V_l1) = s(t_h4s_lists_list(TV_u_27a),h4s_lists_append(s(t_h4s_lists_list(TV_u_27a),V_l),s(t_h4s_lists_list(TV_u_27a),V_l2))))).
