a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X a__U12 pair YS ZS X pair cons mark X YS mark ZS a__afterNth N XS a__snd a__splitAt mark N mark XS a__and tt X mark X a__fst pair X Y mark X a__head cons N XS mark N a__natsFrom N cons mark N natsFrom s N a__sel N XS a__head a__afterNth mark N mark XS a__snd pair X Y mark Y a__splitAt 0 XS pair nil mark XS a__splitAt s N cons X XS a__U11 tt N X XS a__tail cons N XS mark XS a__take N XS a__fst a__splitAt mark N mark XS mark U11 X1 X2 X3 X4 a__U11 mark X1 X2 X3 X4 mark U12 X1 X2 a__U12 mark X1 X2 mark splitAt X1 X2 a__splitAt mark X1 mark X2 mark afterNth X1 X2 a__afterNth mark X1 mark X2 mark snd X a__snd mark X mark and X1 X2 a__and mark X1 X2 mark fst X a__fst mark X mark head X a__head mark X mark natsFrom X a__natsFrom mark X mark sel X1 X2 a__sel mark X1 mark X2 mark tail X a__tail mark X mark take X1 X2 a__take mark X1 mark X2 mark tt tt mark pair X1 X2 pair mark X1 mark X2 mark cons X1 X2 cons mark X1 X2 mark s X s mark X mark 0 0 mark nil nil a__U11 X1 X2 X3 X4 U11 X1 X2 X3 X4 a__U12 X1 X2 U12 X1 X2 a__splitAt X1 X2 splitAt X1 X2 a__afterNth X1 X2 afterNth X1 X2 a__snd X snd X a__and X1 X2 and X1 X2 a__fst X fst X a__head X head X a__natsFrom X natsFrom X a__sel X1 X2 sel X1 X2 a__tail X tail X a__take X1 X2 take X1 X2 2.2 a__U12 pair YS ZS X mark ZS a__afterNth N XS a__splitAt mark N mark XS mark natsFrom X mark X mark and X1 X2 a__and mark X1 X2 a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X a__afterNth N XS a__snd a__splitAt mark N mark XS mark splitAt X1 X2 mark X2 mark head X a__head mark X a__U11 tt N X XS a__splitAt mark N mark XS a__sel N XS mark XS a__U11 tt N X XS mark N mark snd X mark X mark head X mark X a__take N XS a__splitAt mark N mark XS mark U12 X1 X2 mark X1 mark splitAt X1 X2 mark X1 a__sel N XS a__afterNth mark N mark XS mark sel X1 X2 a__sel mark X1 mark X2 a__snd pair X Y mark Y mark tail X a__tail mark X mark snd X a__snd mark X a__natsFrom N mark N mark fst X mark X a__afterNth N XS mark XS mark tail X mark X mark pair X1 X2 mark X2 a__and tt X mark X mark sel X1 X2 mark X1 mark pair X1 X2 mark X1 a__sel N XS mark N a__U11 tt N X XS mark XS a__splitAt 0 XS mark XS mark take X1 X2 mark X1 a__take N XS mark N mark splitAt X1 X2 a__splitAt mark X1 mark X2 a__splitAt s N cons X XS a__U11 tt N X XS mark afterNth X1 X2 mark X1 a__take N XS a__fst a__splitAt mark N mark XS a__afterNth N XS mark N mark natsFrom X a__natsFrom mark X mark fst X a__fst mark X mark afterNth X1 X2 mark X2 mark cons X1 X2 mark X1 mark U11 X1 X2 X3 X4 a__U11 mark X1 X2 X3 X4 mark afterNth X1 X2 a__afterNth mark X1 mark X2 mark take X1 X2 a__take mark X1 mark X2 a__fst pair X Y mark X mark and X1 X2 mark X1 mark take X1 X2 mark X2 a__tail cons N XS mark XS mark s X mark X a__U12 pair YS ZS X mark X mark U12 X1 X2 a__U12 mark X1 X2 a__take N XS mark XS mark sel X1 X2 mark X2 a__head cons N XS mark N a__sel N XS a__head a__afterNth mark N mark XS mark U11 X1 X2 X3 X4 mark X1 true mark U11 X1 X2 X3 X4 mark X1 a__sel N XS a__head a__afterNth mark N mark XS a__splitAt 0 XS mark XS a__sel N XS mark N a__U11 tt N X XS mark XS a__head cons N XS mark N mark pair X1 X2 mark X1 mark sel X1 X2 mark X1 mark sel X1 X2 mark X2 a__and tt X mark X mark pair X1 X2 mark X2 mark tail X mark X a__take N XS mark XS a__afterNth N XS mark XS mark U12 X1 X2 a__U12 mark X1 X2 a__U12 pair YS ZS X mark X mark fst X mark X mark s X mark X a__natsFrom N mark N a__tail cons N XS mark XS mark take X1 X2 mark X2 mark and X1 X2 mark X1 mark snd X a__snd mark X a__fst pair X Y mark X mark tail X a__tail mark X a__snd pair X Y mark Y mark sel X1 X2 a__sel mark X1 mark X2 a__sel N XS a__afterNth mark N mark XS mark afterNth X1 X2 a__afterNth mark X1 mark X2 mark take X1 X2 a__take mark X1 mark X2 mark U11 X1 X2 X3 X4 a__U11 mark X1 X2 X3 X4 mark splitAt X1 X2 mark X1 mark U12 X1 X2 mark X1 a__take N XS a__splitAt mark N mark XS mark cons X1 X2 mark X1 mark head X mark X mark snd X mark X mark afterNth X1 X2 mark X2 a__U11 tt N X XS mark N mark fst X a__fst mark X a__sel N XS mark XS mark natsFrom X a__natsFrom mark X a__U11 tt N X XS a__splitAt mark N mark XS a__afterNth N XS mark N a__take N XS a__fst a__splitAt mark N mark XS mark head X a__head mark X mark afterNth X1 X2 mark X1 mark splitAt X1 X2 mark X2 a__afterNth N XS a__snd a__splitAt mark N mark XS a__splitAt s N cons X XS a__U11 tt N X XS a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X mark splitAt X1 X2 a__splitAt mark X1 mark X2 a__take N XS mark N mark and X1 X2 a__and mark X1 X2 mark natsFrom X mark X a__afterNth N XS a__splitAt mark N mark XS a__U12 pair YS ZS X mark ZS mark take X1 X2 mark X1 true U11 4 1 37657 2 37656 3 37656 4 37656 0 s 1 1 0 a__head 1 1 58481 a__natsFrom 1 1 87762 a__snd 1 1 37895 a__afterNth 2 1 37657 2 37659 0 take 2 1 37658 2 37657 0 and 2 1 7631 2 7630 0 pair 2 1 20588 2 20588 0 fst 1 1 1 natsFrom 1 1 29280 a__snd 1 1 1 splitAt 2 1 37656 2 37656 0 a__U11 4 1 79071 2 96136 3 96135 4 96137 0 a__take 2 1 96138 2 96138 0 U12 2 1 0 2 37656 0 a__U12 2 1 37894 2 96135 0 a__fst 1 1 1 a__natsFrom 1 1 29280 tail 1 1 0 mark 1 1 58482 0 0 60516 a__and 2 1 41416 2 58482 0 sel 2 1 37658 2 37659 0 afterNth 2 1 37657 2 37659 0 nil 0 12280 a__splitAt 2 1 37656 2 37656 0 a__sel 2 1 96139 2 96141 0 mark 1 1 0 a__U11 4 1 37657 2 37656 3 37656 4 37656 0 a__sel 2 1 37658 2 37659 0 a__U12 2 1 0 2 37656 0 head 1 1 0 a__afterNth 2 1 96138 2 96140 0 a__splitAt 2 1 96136 2 96137 0 cons 2 1 17068 2 0 0 snd 1 1 1 a__take 2 1 37658 2 37657 0 tt 0 17067 a__fst 1 1 37895 a__and 2 1 7631 2 7630 0 a__tail 1 1 0 a__tail 1 1 58482 a__head 1 1 0 a__U12 pair YS ZS X mark ZS a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X a__splitAt s N cons X XS a__U11 tt N X XS a__U11 tt N X XS a__splitAt mark N mark XS mark natsFrom X a__natsFrom mark X mark head X mark X mark U12 X1 X2 mark X1 mark sel X1 X2 a__sel mark X1 mark X2 mark tail X a__tail mark X a__tail cons N XS mark XS mark s X mark X mark tail X mark X a__and tt X mark X mark snd X a__snd mark X a__and tt X mark X mark U12 X1 X2 a__U12 mark X1 X2 a__sel N XS a__head a__afterNth mark N mark XS a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X a__afterNth N XS a__snd a__splitAt mark N mark XS mark splitAt X1 X2 a__splitAt mark X1 mark X2 mark head X a__head mark X a__snd X snd X mark tt tt mark and X1 X2 a__and mark X1 X2 a__U11 X1 X2 X3 X4 U11 X1 X2 X3 X4 mark afterNth X1 X2 a__afterNth mark X1 mark X2 mark pair X1 X2 pair mark X1 mark X2 a__splitAt X1 X2 splitAt X1 X2 mark natsFrom X a__natsFrom mark X mark cons X1 X2 cons mark X1 X2 a__fst pair X Y mark X a__U12 X1 X2 U12 X1 X2 a__splitAt 0 XS pair nil mark XS a__head X head X a__natsFrom N cons mark N natsFrom s N mark fst X a__fst mark X mark take X1 X2 a__take mark X1 mark X2 mark 0 0 mark U11 X1 X2 X3 X4 a__U11 mark X1 X2 X3 X4 mark nil nil a__tail cons N XS mark XS mark sel X1 X2 a__sel mark X1 mark X2 mark tail X a__tail mark X a__splitAt s N cons X XS a__U11 tt N X XS a__snd pair X Y mark Y a__take N XS a__fst a__splitAt mark N mark XS a__natsFrom X natsFrom X a__head cons N XS mark N a__fst X fst X a__and X1 X2 and X1 X2 a__sel X1 X2 sel X1 X2 a__tail X tail X a__afterNth X1 X2 afterNth X1 X2 mark s X s mark X a__take X1 X2 take X1 X2 a__U12 pair YS ZS X pair cons mark X YS mark ZS a__and tt X mark X false a__U11 tt N X XS a__splitAt mark N mark XS a__splitAt s N cons X XS a__U11 tt N X XS true a__natsFrom 1 1 and 2 2 fst 1 1 a__snd 1 1 a__fst 1 1 mark 1 1 mark 1 1 snd 1 1 a__and 2 2 a__tail 1 1 U11 4 6 s 1 6 1 a__head 1 0 a__snd 1 0 a__afterNth 2 4 take 2 4 1 pair 2 0 natsFrom 1 5 splitAt 2 6 2 a__U11 4 3 2 a__take 2 0 1 2 U12 2 1 a__U12 2 0 1 a__natsFrom 1 5 tail 1 4 0 0 5 a__and 2 0 sel 2 3 2 afterNth 2 4 nil 0 6 a__splitAt 2 6 2 a__sel 2 0 a__U11 4 6 a__sel 2 3 2 a__U12 2 1 head 1 2 a__afterNth 2 0 2 a__splitAt 2 3 1 cons 2 2 a__take 2 4 1 tt 0 6 a__fst 1 0 a__tail 1 4 a__head 1 2 U11 4 1 24567 3 24568 4 24570 0 s 1 1 0 a__head 1 1 a__snd 1 1 a__afterNth 2 2 24571 take 2 1 2 24571 pair 2 1 12284 2 24569 0 natsFrom 1 1 12284 splitAt 2 2 24570 0 a__U11 4 1 0 2 12282 3 12285 4 12284 0 a__take 2 1 2 1 U12 2 1 0 2 24568 0 a__U12 2 1 1 0 a__natsFrom 1 1 12284 tail 1 1 1 0 0 0 a__and 2 1 1 sel 2 2 38080 afterNth 2 2 24571 nil 0 0 a__splitAt 2 2 24570 0 a__sel 2 2 1 a__U11 4 1 24567 3 24568 4 24570 0 a__sel 2 2 38080 a__U12 2 1 0 2 24568 0 head 1 1 13508 a__afterNth 2 2 1 a__splitAt 2 1 12282 2 12284 0 cons 2 1 12283 2 0 0 a__take 2 1 2 24571 tt 0 12283 a__fst 1 1 a__tail 1 1 1 a__head 1 1 13508 a__U11 tt N X XS a__splitAt mark N mark XS mark snd X a__snd mark X a__and tt X mark X mark U12 X1 X2 a__U12 mark X1 X2 a__sel N XS a__head a__afterNth mark N mark XS a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X a__afterNth N XS a__snd a__splitAt mark N mark XS mark splitAt X1 X2 a__splitAt mark X1 mark X2 mark head X a__head mark X a__snd X snd X mark tt tt mark and X1 X2 a__and mark X1 X2 a__U11 X1 X2 X3 X4 U11 X1 X2 X3 X4 mark afterNth X1 X2 a__afterNth mark X1 mark X2 mark pair X1 X2 pair mark X1 mark X2 a__splitAt X1 X2 splitAt X1 X2 mark natsFrom X a__natsFrom mark X mark cons X1 X2 cons mark X1 X2 a__fst pair X Y mark X a__U12 X1 X2 U12 X1 X2 a__splitAt 0 XS pair nil mark XS a__head X head X a__natsFrom N cons mark N natsFrom s N mark fst X a__fst mark X mark take X1 X2 a__take mark X1 mark X2 mark 0 0 mark U11 X1 X2 X3 X4 a__U11 mark X1 X2 X3 X4 mark nil nil a__tail cons N XS mark XS mark sel X1 X2 a__sel mark X1 mark X2 mark tail X a__tail mark X a__splitAt s N cons X XS a__U11 tt N X XS a__snd pair X Y mark Y a__take N XS a__fst a__splitAt mark N mark XS a__natsFrom X natsFrom X a__head cons N XS mark N a__fst X fst X a__and X1 X2 and X1 X2 a__sel X1 X2 sel X1 X2 a__tail X tail X a__afterNth X1 X2 afterNth X1 X2 mark s X s mark X a__take X1 X2 take X1 X2 a__U12 pair YS ZS X pair cons mark X YS mark ZS a__U11 tt N X XS a__splitAt mark N mark XS false a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X false a__U12 pair YS ZS X mark ZS false mark U12 X1 X2 mark X1 mark head X mark X a__tail cons N XS mark XS mark tail X mark X mark tail X a__tail mark X mark s X mark X true U11 4 1 4 3 3 4 2 0 s 1 1 0 a__head 1 58481 a__natsFrom 1 87762 a__snd 1 37895 a__afterNth 2 1 3 2 4 0 take 2 1 3 2 4 0 and 2 2 1 0 pair 2 1 1 2 2 0 fst 1 1 1 natsFrom 1 1 9049 a__snd 1 1 1 splitAt 2 2 2 0 a__U11 4 0 a__take 2 0 U12 2 1 0 2 3 0 a__U12 2 0 a__fst 1 1 1 a__natsFrom 1 1 9049 tail 1 1 2 mark 1 1 58481 0 0 25828 a__and 2 0 sel 2 1 4 2 5 0 afterNth 2 1 3 2 4 0 nil 0 1 a__splitAt 2 2 2 0 a__sel 2 0 mark 1 1 0 a__U11 4 1 4 3 3 4 2 0 a__sel 2 1 4 2 5 0 a__U12 2 1 0 2 3 0 head 1 1 1 a__afterNth 2 0 a__splitAt 2 0 cons 2 1 2 2 0 0 snd 1 1 1 a__take 2 1 3 2 4 0 tt 0 0 a__fst 1 37895 a__and 2 2 1 0 a__tail 1 1 2 a__tail 1 1 58482 a__head 1 1 1 mark s X mark X mark U12 X1 X2 mark X1 mark snd X a__snd mark X a__and tt X mark X mark U12 X1 X2 a__U12 mark X1 X2 a__sel N XS a__head a__afterNth mark N mark XS a__U11 tt N X XS a__U12 a__splitAt mark N mark XS X a__afterNth N XS a__snd a__splitAt mark N mark XS mark splitAt X1 X2 a__splitAt mark X1 mark X2 mark head X a__head mark X a__snd X snd X mark tt tt mark and X1 X2 a__and mark X1 X2 a__U11 X1 X2 X3 X4 U11 X1 X2 X3 X4 mark afterNth X1 X2 a__afterNth mark X1 mark X2 mark pair X1 X2 pair mark X1 mark X2 a__splitAt X1 X2 splitAt X1 X2 mark natsFrom X a__natsFrom mark X mark cons X1 X2 cons mark X1 X2 a__fst pair X Y mark X a__U12 X1 X2 U12 X1 X2 a__splitAt 0 XS pair nil mark XS a__head X head X a__natsFrom N cons mark N natsFrom s N mark fst X a__fst mark X mark take X1 X2 a__take mark X1 mark X2 mark 0 0 mark U11 X1 X2 X3 X4 a__U11 mark X1 X2 X3 X4 mark nil nil a__tail cons N XS mark XS mark sel X1 X2 a__sel mark X1 mark X2 mark tail X a__tail mark X a__splitAt s N cons X XS a__U11 tt N X XS a__snd pair X Y mark Y a__take N XS a__fst a__splitAt mark N mark XS a__natsFrom X natsFrom X a__head cons N XS mark N a__fst X fst X a__and X1 X2 and X1 X2 a__sel X1 X2 sel X1 X2 a__tail X tail X a__afterNth X1 X2 afterNth X1 X2 mark s X s mark X a__take X1 X2 take X1 X2 a__U12 pair YS ZS X pair cons mark X YS mark ZS mark U12 X1 X2 mark X1 mark s X mark X true U11 4 1 6 s 1 1 1 a__head 1 0 a__natsFrom 1 0 a__snd 1 0 a__afterNth 2 2 1 take 2 2 5 and 2 1 2 5 pair 2 1 1 fst 1 2 natsFrom 1 5 a__snd 1 2 splitAt 2 1 5 a__U11 4 0 a__take 2 0 U12 2 1 2 3 a__U12 2 0 a__fst 1 1 1 a__natsFrom 1 4 tail 1 1 5 mark 1 1 1 0 0 4 a__and 2 0 sel 2 1 2 afterNth 2 1 2 nil 0 4 a__splitAt 2 4 a__sel 2 0 mark 1 3 a__U11 4 4 5 a__sel 2 2 1 a__U12 2 1 2 head 1 5 a__afterNth 2 0 a__splitAt 2 0 cons 2 5 snd 1 3 a__take 2 4 tt 0 4 a__fst 1 0 a__and 2 4 a__tail 1 4 a__tail 1 0 a__head 1 1 4 mark sel X1 X2 a__sel mark X1 mark X2 false mark natsFrom X a__natsFrom mark X false NaTT certifiable-1.6