a__zeros cons 0 zeros a__U11 tt L a__U12 tt L a__U12 tt L s a__length mark L a__U21 tt IL M N a__U22 tt IL M N a__U22 tt IL M N a__U23 tt IL M N a__U23 tt IL M N cons mark N take M IL a__length nil 0 a__length cons N L a__U11 tt L a__take 0 IL nil a__take s M cons N IL a__U21 tt IL M N mark zeros a__zeros mark U11 X1 X2 a__U11 mark X1 X2 mark U12 X1 X2 a__U12 mark X1 X2 mark length X a__length mark X mark U21 X1 X2 X3 X4 a__U21 mark X1 X2 X3 X4 mark U22 X1 X2 X3 X4 a__U22 mark X1 X2 X3 X4 mark U23 X1 X2 X3 X4 a__U23 mark X1 X2 X3 X4 mark take X1 X2 a__take mark X1 mark X2 mark cons X1 X2 cons mark X1 X2 mark 0 0 mark tt tt mark s X s mark X mark nil nil a__zeros zeros a__U11 X1 X2 U11 X1 X2 a__U12 X1 X2 U12 X1 X2 a__length X length X a__U21 X1 X2 X3 X4 U21 X1 X2 X3 X4 a__U22 X1 X2 X3 X4 U22 X1 X2 X3 X4 a__U23 X1 X2 X3 X4 U23 X1 X2 X3 X4 a__take X1 X2 take X1 X2 2.2 a__U23 tt IL M N mark N mark U11 X1 X2 a__U11 mark X1 X2 mark U23 X1 X2 X3 X4 a__U23 mark X1 X2 X3 X4 mark length X mark X a__U22 tt IL M N a__U23 tt IL M N mark take X1 X2 a__take mark X1 mark X2 a__U21 tt IL M N a__U22 tt IL M N mark s X mark X mark U23 X1 X2 X3 X4 mark X1 mark take X1 X2 mark X1 a__length cons N L a__U11 tt L mark U11 X1 X2 mark X1 a__take s M cons N IL a__U21 tt IL M N mark zeros a__zeros mark U21 X1 X2 X3 X4 mark X1 mark U22 X1 X2 X3 X4 mark X1 a__U12 tt L mark L mark take X1 X2 mark X2 mark U21 X1 X2 X3 X4 a__U21 mark X1 X2 X3 X4 mark U22 X1 X2 X3 X4 a__U22 mark X1 X2 X3 X4 mark U12 X1 X2 a__U12 mark X1 X2 a__U11 tt L a__U12 tt L mark length X a__length mark X mark cons X1 X2 mark X1 mark U12 X1 X2 mark X1 a__U12 tt L a__length mark L true a__U12 tt L a__length mark L mark take X1 X2 mark X1 mark U12 X1 X2 mark X1 mark U23 X1 X2 X3 X4 mark X1 mark cons X1 X2 mark X1 mark s X mark X mark length X a__length mark X a__U11 tt L a__U12 tt L a__U21 tt IL M N a__U22 tt IL M N mark U12 X1 X2 a__U12 mark X1 X2 mark take X1 X2 a__take mark X1 mark X2 mark U22 X1 X2 X3 X4 a__U22 mark X1 X2 X3 X4 mark U21 X1 X2 X3 X4 a__U21 mark X1 X2 X3 X4 mark take X1 X2 mark X2 a__U22 tt IL M N a__U23 tt IL M N mark length X mark X mark U23 X1 X2 X3 X4 a__U23 mark X1 X2 X3 X4 a__U12 tt L mark L mark U22 X1 X2 X3 X4 mark X1 mark U11 X1 X2 a__U11 mark X1 X2 mark U21 X1 X2 X3 X4 mark X1 a__take s M cons N IL a__U21 tt IL M N mark U11 X1 X2 mark X1 a__U23 tt IL M N mark N a__length cons N L a__U11 tt L true U21 4 1 2 3 4 4 U11 2 1 2 21239 s 1 1 0 a__U23 4 4 1 take 2 1 2 5 U23 4 1 2 3 4 4 a__U22 4 1 2 3 4 4 a__U11 2 2 21238 zeros 0 1 a__take 2 2 4 U12 2 1 2 21239 a__U12 2 2 21238 a__U21 4 4 3 mark 1 1 0 0 0 0 a__zeros 0 0 a__U21 4 1 2 3 4 4 nil 0 3 mark 1 1 0 a__U11 2 1 2 21239 a__length 1 1 21238 a__U12 2 1 2 21239 a__U22 4 4 2 cons 2 1 2 0 a__take 2 1 2 5 tt 0 1 a__U23 4 1 2 3 4 4 U22 4 1 2 3 4 4 length 1 1 21240 a__zeros 0 1 a__length 1 1 21240 a__length cons N L a__U11 tt L a__U11 tt L a__U12 tt L mark s X mark X mark cons X1 X2 mark X1 a__U12 tt L a__length mark L mark take X1 X2 a__take mark X1 mark X2 a__U21 tt IL M N a__U22 tt IL M N mark U21 X1 X2 X3 X4 a__U21 mark X1 X2 X3 X4 a__length cons N L a__U11 tt L a__zeros cons 0 zeros a__U12 tt L s a__length mark L mark U22 X1 X2 X3 X4 a__U22 mark X1 X2 X3 X4 mark tt tt a__U12 X1 X2 U12 X1 X2 mark cons X1 X2 cons mark X1 X2 mark U23 X1 X2 X3 X4 a__U23 mark X1 X2 X3 X4 a__length X length X mark s X s mark X a__U21 X1 X2 X3 X4 U21 X1 X2 X3 X4 a__U22 tt IL M N a__U23 tt IL M N a__take s M cons N IL a__U21 tt IL M N a__length nil 0 mark 0 0 a__U11 X1 X2 U11 X1 X2 a__U23 X1 X2 X3 X4 U23 X1 X2 X3 X4 mark length X a__length mark X a__take X1 X2 take X1 X2 mark U11 X1 X2 a__U11 mark X1 X2 mark nil nil a__zeros zeros mark zeros a__zeros a__take 0 IL nil mark U12 X1 X2 a__U12 mark X1 X2 a__U23 tt IL M N cons mark N take M IL a__U22 X1 X2 X3 X4 U22 X1 X2 X3 X4 a__U11 tt L a__U12 tt L mark cons X1 X2 mark X1 mark s X mark X true U21 4 1 2 3 4 1 U11 2 1 6724 s 1 1 6725 a__U23 4 1 take 2 1 31347 U23 4 2 3 4 13506 a__U22 4 1 3 41685 a__U11 2 21238 zeros 0 1 a__take 2 4 U12 2 2 17067 a__U12 2 21238 a__U21 4 3 mark 1 1 0 0 0 0 a__zeros 0 0 a__U21 4 2 24391 nil 0 1 mark 1 1 24389 a__U11 2 2 31114 a__length 1 21238 a__U12 2 1 17066 a__U22 4 2 cons 2 1 2 0 a__take 2 0 tt 0 14049 a__U23 4 1 4 41686 U22 4 2 4 41684 length 1 1 a__zeros 0 0 a__length 1 1 2 mark cons X1 X2 mark X1 mark cons X1 X2 mark X1 true U21 4 1 2 3 4 0 U11 2 1 0 s 1 1 0 a__U23 4 1 take 2 1 3 U23 4 2 3 4 0 a__U22 4 1 3 2 a__U11 2 21238 zeros 0 1 a__take 2 4 U12 2 1 2 7 a__U12 2 21238 a__U21 4 3 mark 1 1 0 0 0 0 a__zeros 0 0 a__U21 4 2 5 nil 0 2 mark 1 4 a__U11 2 2 5 a__length 1 21238 a__U12 2 6 a__U22 4 2 cons 2 1 2 1 a__take 2 1 tt 0 4 a__U23 4 1 4 3 U22 4 2 4 0 length 1 0 a__zeros 0 0 a__length 1 1 3 a__length cons N L a__U11 tt L a__U12 tt L a__length mark L a__U11 tt L a__U12 tt L true Failed! NaTT certifiable-1.6