testlist <- list(hk = structure(c(6.57658146919641e+186, 6.26329028749919e-169,  3.65123916453763e+152, 1.80867886476511e-97, 3.5517347251084e-271,  5.17029651285128e-293, 1.2173394940709e-125, 5.37823090822506e-79,  8.07430465104601e+300, 2.96075623130968e+289, 1.04590869532787e-68,  6.72231442557402e-129), .Dim = c(2L, 6L)), mk = structure(c(7.59333633558835e-196,  1.67244064965443e+87, 1.21113389137572e+289, 1.66018254061754e+90,  2.10324613344103e+57, 2.96978398858476e+121, 5.69220691613506e+200,  6.43951191874179e-211, 1.40192528369618e-80, 3.06161464618547e-73,  3.63369197935844e-262, 4.32361575779144e+183, 1.80623836228347e-292,  1.66672080882018e-212, 4.7630966613182e-306, 5.38793438392187e-51,  2.979966182755e-73, 3.18603332021152e-205, 1.21673599461694e-27,  2.84763448459035e+162, 8.35347814441633e+191, 9.98888628454232e-213,  1.65027595753064e+244, 1.26552511022412e-141, 7.57006791094849e+251,  8.61010161635264e+71, 7.31332148324137e-82, 2.8162051827303e-160,  1.85641495035495e-35, 1.94132403627954e-266, 3.16850795242331e-152,  3.1814577499292e-256, 8.66406220385011e-193, 1.32963522186371e-175,  3.83457871597529e+75, 5.77703048910251e-236, 8.95040865456379e+68,  1.48652017304323e+153, 1.64144929322995e-204, 5.81133641200458e+258,  1.34970214268003e+77, 1.3597527274616e+112, 1.80548766984221e+84,  2.25144232899817e+227, 4.59997235820801e+297, 2.84410246450793e-244,  0.000119823615041407, 1.4051774685971e-239, 3.09396790812768e+184,  4.31429582794845e-21, 8.0342325776026e-142, 5.56314881805654e-214,  1.47673913585636e+154, 9.22074419988842e+47, 1.75248381293667e-239,  8.43360067233968e+98, 2.02823141028881e+233, 7.38205192210469e+296,  7.41271797006622e-60, 18270324716556777472, 4.87475900970384e+234,  1.1489945603319e+287, 3.46771355652753e-13, 2.24425762330721e-126,  2.70603816528335e+82, 7.38264193723808e+278, 2.90818941013781e+73,  5.55766892650894e+258, 2.10773277569769e-15, 2.87761828516983e+302 ), .Dim = c(10L, 7L)), n_steps = -1761561326L, nc = -1305837195L,      nr = 142226120L, start = 570507707L)
result <- do.call(amt:::simulate_udf,testlist)
str(result)