testlist <- list(i1 = c(1572939555L, -638019885L, 1545899118L, -773230432L,  -1389144652L, -2061222557L, -1578013924L, -1470220027L, 543238393L,  1505676469L, -497474637L, 1116951792L, -961960885L, -840847506L,  -753235333L, 2042855577L, 615027326L, 1717449545L, -1218970374L,  -363795791L, -108069690L, 1873491010L, -960578241L, -2109876058L,  -446028724L, -933718656L, -1349420391L, -496743717L, -230186399L,  -220814152L, -1788741865L, -1613775484L, 971165698L, 979731177L,  -134446375L, 1624093778L, 341226246L, 760725442L, -1179199144L,  -2036933441L, 2024653234L, 306420489L, 1058988703L, -342363649L,  -307952358L, -54207307L, 2075462913L, 1290453188L, -1753057367L,  -988630267L, 815113243L, 748034586L, 991966263L, -468587169L,  -956669934L, -467544197L, -1555159704L, 1624796561L, 1829940378L,  -1463307037L, -404219189L, -116970560L, 42717926L, -1398185393L,  -142100392L, NA, -562187256L, 1545257539L, 64819196L, -465912602L,  -980431502L, 942653744L, -1233549291L, -1619926570L, 105428579L,  1652074085L, 1437950522L, -283238219L), i2 = c(1505130759L, -1549734464L,  -2013031702L, -1585779792L, 1136903508L, 1346291542L, 1570812465L,  -616041163L, -43107167L, 237592983L, 754155981L, 1835892144L,  809632896L, -2134059043L, 1820921672L, -805012018L, 1941532545L,  -489678834L, -1013261519L, 123265335L, -1696155877L, -1299253218L,  386361064L, 216249983L, -1675296642L, -182874952L, -1285035590L,  -1077153446L, -1314359965L, 929923406L, 1978152577L, -873725848L,  285271558L, 427016140L, -626489702L, 1937241124L, 543786839L,  -704010933L, -237187908L, -926145318L, -854859546L, 2124395352L,  1211757243L, -1310269231L, 1332160550L, 1892512097L, -1455546766L,  172117207L, 1294778059L, -865000428L, -1441345701L, -38851508L,  391410311L, 585427403L, 570899756L, 1233716375L, -1228774782L,  864458461L, -1654310502L, 358999596L, -1168526372L, 1033676639L,  -1545237523L, 1854899236L, 1374070404L, 1832673802L, -1566858057L,  9102266L, -476670432L, 859733974L, 587973521L, -1706576148L,  777810075L, -1714248389L, 1833562734L, -741005129L, 1807734686L,  -44600032L, 1647882748L, -2140673874L, -1000781475L, 737056921L,  931792650L, 1596965322L, -291935765L, -253883566L, 381505174L,  607601896L, -1869789765L, 2078102706L, 1734065606L, -1954639495L,  402285831L, -663725586L, 766018898L, -540460433L, 1468017362L,  1568638405L, -633173147L, -1071849512L), i3 = c(728641410L, -296135348L,  -656797261L, 479992028L, -1174948657L, 999603952L, -845426002L,  -49910232L, 1956490083L, -167727153L, -624917770L, 1553650197L,  -1836587571L, 463715816L, 1049597499L, -1794874614L, -1592889961L,  236742376L, -588718536L, -2085532139L, 942924371L, -694142188L,  802246597L, -709701770L, -1053028913L, 1484044340L, 1553362143L,  1203434623L, -304622909L, 1997395878L, -567907405L, -650499686L,  1983343054L, -1423900153L, -1200625665L, 702250775L, -1303258583L,  1605554237L, -667160143L, 1981434860L, 1370864636L, -692255602L,  753634902L, -972198535L, 1581753021L, -109904942L, -1360231644L,  114233432L, -2067049382L, -1990661707L, 1131875082L, -2072476702L,  -1071275847L, -1734636730L, -2029032819L, -562371230L, 1178254543L,  -1834646314L, 479256736L, 140739528L, -2010938848L, -1106418107L,  483447546L, 1270373521L, -233217916L, -1092330789L, 1949989757L,  -1644280538L, 566707935L, -710073103L, 2113400008L, -1354212959L,  1639523616L, -1635714286L, -1166635176L, 1976925846L, -1664846223L,  1905943535L, -1857046720L, -1760435719L, -905504408L, -2028700863L,  -1979016705L, -552102276L, -603132595L, -1504691144L, -1611368393L,  89796815L, 1632188648L, 1572022759L, -1111234659L, -629335626L,  -1996094417L), nT = 1520036990L, x = c(9.0092856127176e+49, NA,  -6.32331621934548e-262, -6.94149402572426e+240, -3.64767806100063e+289,  5.35999294638035e+113, 1.20004710252962e+261, 961143.117944933,  3.68744868169267e-184, -1.09389480080953e+104, 6.31096591536693e-177,  3.06497340907627, 6.02589856475016e-14, 5.01756595031833e-87,  -2.13498142502434e+141, 1.25617130911575e+277, 1.1437289148907e-86,  -5.93413657666805e+50, NaN, -380.376707376357, -1.56240694983469e-197,  -8.18323273600628e-138, -1.23047507019948e-289, 1.67877104207064e+175,  -1.2012425576463e+55, -2.01394701200203e-283, 1.40714466203009e+234,  1.707166166394e-284, 2.79944303476162e+234, 5.04495456654084e+195,  -2.37456647433599e+122, -2.55923742421055e+140, 3.25108071854967e+293,  9.91188653486232e-69, -Inf, -4.5546036096705e+184, -1.95601972302529e-178,  -2.21661117524315e-248, -5.42468828762777e+46, -2619.21629482492,  7.06626483250617e+73, 8.52990976087608e-37, -3.49378141641144e+224,  -2.40520810736914e-162, -8.74324710776317e+191, 1.11355751179064e+54,  1.4346119312397e-155, 1.7816961692254e-235, NaN, -1.03242074447979e-127,  -5.17507908835407e-161, 1.28284613339116e-103, 3.93651375338399e-132,  -2.93480135523578e+173, 5.52570616647717e+262, -1.83277904973307e+208,  2.65637628779931e-264, 0), xT = c(1.20497945372306e-80, -2.24615569064747e-139,  6.13766072989248e-71, -6.83842371899167e-207, -5.1399158305336e-188,  -3.84941204961536e+177, 7.62487287673041e+266, -7.01397570338759e+67,  NA, -2.92075860439392e-207, 1.98490235020641e-257, 8.28971418702364e+166,  9.66783183468368e-50, -Inf, 2.46993452537807e+76, -1.0160046651705e-235,  -8.95917945975771e-135, -6.06249726877468e-109, 2.12439140436259e-244,  2.7087550859215e-266, 4.30626744607068e-136, -1.02422924764792e+174,  3.5871647055511e-115, -4.07202669362491e+259, 7.96034529606837e+55,  -1.52029575642479e+179, 2.11422598973339e-279, Inf, -1.33409174187634e+176,  1.28591596418051e-74, -1.906033682933e+273, -1.10316221979205e-225,  -1.89330920809966e+185, 3.35532147368812e-161, -6.48053033324502e-229,  2.78353556605942e-180, 1.5660502088191e-82, -9.35042269640403e-273,  -8.20918866662634e-196, 8.08085397924225e-255, 1.11188572779741e+119,  1.12491136815598e+250, -3.45329097920505e+258, NaN, 1.27908697326124e-52,  4.78605232762292e+109, -1.44507438733095e+77, 2.29013520567251e-47,  5.04400974620143e+140, 1.3823414842232e+180, -2.46067123116145e+197,  2.10880877114811e-35, -2.65480281800843e+246, 4.46512942305604e+151,  1.46517148118916e+258, 2.14470086971152e+273, 4.41472864579235e-172,  -3.18572261538908e-239, -1.36637676658912e+130, Inf, 8.70570634845722e+101,  1.494394240137e-138, 2.65976677403056e-25, -1.70861577507925e+300,  -3.61831920580663e+111, -6.85014159786188e+251, -9.53484611393976e+225,  1.84033459146182e+34, 4.17795991348531e+181, -3.84155006789089e-213,  5.2719705720911e+211, 1.26526148601746e+268, 1.93700057442335e+164,  0), y = c(-1.00689235276082e+289, 3.80781524056203e-192, -5.89737216010346e-157,  2.35417664181719e-73, -1.10849723997504e+45, 1.09185407935804e+302,  1.10145919238101e-120, 2.40623865973202e-292, 8.06571638461752e-18,  -3296309366999352, 2.63999276146483e+286, 3.06772627610413e-183,  1.66692368766089e+182), yT = c(2.80853367569739e+296, 9.22551418738672e+111,  -8.36617069307534e-256, 1.74222401161979e-221, -4.54461270494257e+70,  1.68081155202381e+152, -2.44249173646253e+91, 1.4663202466888e+227,  7.02531124111404e-171, 6.23775212696001e+283, 8.49240168878597e-262,  1.00333904237875e-74, 3.05221015424709e-17, 3.80089249064488e+274,  2.58248307686191e+141, -8.31035147436276e-170, 2.6068234597061e-175,  9.97498045655483e+170, 3.12989848911561e+203, -2.10733316271681e+238,  1.35989412423915e-18, -8.96180042509102e-170, -6.56877006726177e-40,  3.51078425115816e+255, -2.1534200687437e+248, -2.66332285997838e+65,  -6.87142395112435e+124, -1.07663508607988e-144, 1.52909886877928e-300,  7.63294632966052e-274, 4.0034806650571e-11, -8.64244138994049e+102,  -4.74697083405726e-102, -6.36800314662311e-185, 4.16381583521708e-13,  -1.44986890307992e-263, -8.0026079513077e-243, -3.69190379185592e+67,  -0.473314196735313, 9.62170953565631e+202, -3.51154651202914e+247,  1.82567694346624e-35, 5.5772357066007e+208, -211387484712028,  4176594.71512837, -2.67540166047154e-149, 1.47113514408586e-140,  4.40126919860367e+216, -1.29959671426824e-31, 1.76569933422775e-153,  -601535673562.956, 9.12344488515541e+176, 0.000890438715319804,  2.02816954447841e-108, 2.32339076434377e-241, -7.55079051812266e+263,  4.67196601568927e+203, -2.09189900449801e-282, 4.14996862487685e+223,  7.87643743619454e-221, 9.007118239422e+114, -5.09616776272607e-20,  -2.46781596671773e+236, 9.34929278875763e-204, 5.71260077808286e+169,  -1.77244743278426e+105, 3.12174922273452e+61, -1.52806616132056e-190,  7.41202253048063e-58, -6.71924448609584e+294, 2.26162623218276e-80,  -5.05717680792059e+59, -1.62788683740859e+56, -677559555824494,  -2.17220660925364e-212, -9.9722375616737e+171, 1.13804672408732e-180,  -12130181.1288675, 4.26232659870254e-103, 1.27584310375834e-256,  -1.81133189576693e-31, -1.61246665840102e-54))
result <- do.call(interp:::triFind,testlist)
str(result)