% SZS status Theorem for BUTLASTN__LENGTH__CO
% SZS output start Proof for BUTLASTN__LENGTH__CO
  file('i/f/rich_list/BUTLASTN__LENGTH__CONS',ch4s_richu_u_lists_BUTLASTNu_u_LENGTHu_u_CONS)).
  file('i/f/rich_list/BUTLASTN__LENGTH__CONS',ah4s_bools_EQu_u_CLAUSESu_c1)).
  file('i/f/rich_list/BUTLASTN__LENGTH__CONS',ah4s_arithmetics_LESSu_u_EQu_u_REFL)).
  file('i/f/rich_list/BUTLASTN__LENGTH__CONS',ah4s_richu_u_lists_BUTLASTNu_u_LENGTHu_u_NIL0)).
  file('i/f/rich_list/BUTLASTN__LENGTH__CONS',ah4s_richu_u_lists_BUTLASTNu_u_CONS)).
  file('i/f/rich_list/BUTLASTN__LENGTH__CONS',aHLu_TRUTH)).
% SZS output end Proof for BUTLASTN__LENGTH__CO
