Why the primal and dual simplex process is so long?

Hi,

Are there any errors in  my MILP model? Why the primal and dual simplex process is so long?

Gurobi Optimizer version 9.1.0 build v9.1.0rc0 (win64)
Thread count: 4 physical cores, 8 logical processors, using up to 8 threads
Optimize a model with 237631 rows, 80249 columns and 704176 nonzeros
Model fingerprint: 0xf25a92e6
Variable types: 59650 continuous, 20599 integer (20599 binary)
Coefficient statistics:
  Matrix range     [8e-03, 1e+03]
  Objective range  [1e+00, 1e+00]
  Bounds range     [1e+00, 1e+00]
  RHS range        [3e-01, 4e+03]
Presolve removed 65465 rows and 21904 columns (presolve time = 5s) ...
Presolve removed 69863 rows and 22598 columns
Presolve time: 7.57s
Presolved: 167768 rows, 57651 columns, 552504 nonzeros
Variable types: 40769 continuous, 16882 integer (16872 binary)

Deterministic concurrent LP optimizer: primal and dual simplex (primal and dual model)
Showing first log only...


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
       0    1.5835398e+05   7.858324e+05   8.557586e+10     10s
   69772    1.7765987e+05   6.209551e+04   1.939003e+10     15s
   83573    1.8264821e+05   4.489968e+04   1.391591e+10     20s
   91964    1.8376322e+05   3.649676e+04   1.224387e+10     25s
   98767    1.8423574e+05   3.082040e+04   1.314723e+10     30s
  101730    1.8413240e+05   2.850518e+04   1.095721e+10     35s
  104651    1.8398127e+05   2.649255e+04   1.243670e+10     40s
  108015    1.8406991e+05   2.448995e+04   1.028574e+10     45s
  110017    1.8439475e+05   2.334205e+04   2.012878e+10     51s
  111814    1.8436416e+05   2.221591e+04   9.035619e+09     56s
  114078    1.8454821e+05   2.070535e+04   9.002919e+09     60s
  116990    1.8470399e+05   1.898181e+04   9.887864e+09     65s
  119208    1.8493650e+05   1.785280e+04   8.276973e+09     71s
  120979    1.8524552e+05   1.722959e+04   9.731032e+09     75s
  122531    1.8557781e+05   1.666174e+04   7.808426e+09     80s
  124076    1.8557394e+05   1.602598e+04   8.225182e+09     86s
  126077    1.8553324e+05   1.523612e+04   7.827085e+09     91s
  127627    1.8560587e+05   1.442821e+04   2.333896e+10     96s
  129169    1.8557480e+05   1.371521e+04   8.966419e+09    101s
  130496    1.8559259e+05   1.332402e+04   1.126647e+10    106s
  131603    1.8575897e+05   1.255995e+04   7.689996e+10    110s
  132927    1.8579288e+05   1.183813e+04   7.744583e+09    116s
  134031    1.8580096e+05   1.139663e+04   2.262951e+10    120s
  135369    1.8584919e+05   1.059988e+04   1.187270e+10    126s
  136484    1.8605660e+05   1.019838e+04   8.520134e+09    131s
  137365    1.8609508e+05   1.004228e+04   7.785611e+09    136s
  138249    1.8625943e+05   9.896621e+03   6.974723e+09    141s
  139135    1.8622938e+05   9.652879e+03   1.042053e+10    145s
  140237    1.8612938e+05   9.325961e+03   1.852941e+10    151s
  141343    1.8661184e+05   9.039795e+03   6.571374e+09    156s
  142225    1.8680323e+05   8.826590e+03   1.645956e+10    160s
  143554    1.8685118e+05   8.211666e+03   2.783079e+10    166s
  144676    1.8702824e+05   7.841552e+03   8.040096e+09    170s
  145999    1.8720689e+05   7.544978e+03   5.345381e+09    175s
  147102    1.8734222e+05   7.357345e+03   1.274289e+10    180s
  148216    1.8742240e+05   7.173884e+03   9.108161e+09    185s
  149541    1.8756461e+05   6.856894e+03   5.904931e+09    191s
  150422    1.8748379e+05   6.818844e+03   4.961328e+09    195s
  151304    1.8731973e+05   6.663208e+03   4.991932e+09    200s
  152637    1.8720190e+05   6.341967e+03   7.061325e+09    205s
  153965    1.8721014e+05   6.005740e+03   7.750839e+09    210s
  155289    1.8692780e+05   5.705981e+03   4.910716e+09    216s
  156173    1.8663958e+05   5.542779e+03   7.290290e+09    221s
  157275    1.8653067e+05   5.402089e+03   5.074602e+09    226s
  158160    1.8648726e+05   5.244749e+03   8.169584e+09    231s
  159264    1.8649697e+05   4.995952e+03   5.213389e+09    235s
  160367    1.8645642e+05   4.904448e+03   9.592675e+09    241s
  161252    1.8636993e+05   4.699836e+03   3.739634e+09    246s
  162133    1.8637078e+05   4.632101e+03   5.940627e+09    251s
  163015    1.8638908e+05   4.526834e+03   9.578555e+09    256s
  164119    1.8596037e+05   4.312896e+03   3.345277e+09    261s
  165000    1.8594909e+05   4.274703e+03   3.588981e+09    266s
  165886    1.8596581e+05   4.189501e+03   3.627120e+09    271s
  166768    1.8595675e+05   4.146085e+03   2.224373e+10    276s
  167653    1.8595002e+05   4.013027e+03   3.226375e+09    280s
  168757    1.8593705e+05   3.898801e+03   6.443860e+09    286s
  169641    1.8586828e+05   3.780861e+03   5.179915e+09    291s
  170304    1.8589935e+05   3.724583e+03   1.647260e+10    296s
  171186    1.8590785e+05   3.661149e+03   4.067675e+09    301s
  172067    1.8591240e+05   3.616058e+03   2.946748e+09    306s
  172728    1.8588899e+05   3.580758e+03   1.517489e+10    310s
  173836    1.8593368e+05   3.367625e+03   3.899654e+09    316s
  174721    1.8611960e+05   3.288351e+03   4.083259e+09    321s
  175603    1.8611987e+05   3.072449e+03   8.871509e+10    325s
  176703    1.8615072e+05   2.895320e+03   9.646969e+09    331s
  177584    1.8614696e+05   2.830512e+03   3.925572e+09    336s
  178466    1.8620723e+05   2.664952e+03   9.047777e+09    341s
  179348    1.8621071e+05   2.557788e+03   6.149083e+09    345s
  180457    1.8630919e+05   2.437374e+03   3.501993e+09    351s
  181339    1.8648103e+05   2.403302e+03   7.775800e+09    356s
  182222    1.8659711e+05   2.373412e+03   3.321005e+09    360s
  183331    1.8653859e+05   2.300856e+03   4.053791e+09    366s
  184213    1.8659848e+05   2.229473e+03   7.143518e+09    370s
  185315    1.8663655e+05   2.134862e+03   2.133740e+10    376s
  186197    1.8666406e+05   2.109100e+03   3.764982e+09    380s
  187298    1.8662552e+05   2.056274e+03   4.311399e+09    386s
  188179    1.8662394e+05   2.011638e+03   3.379005e+10    390s
  189059    1.8663064e+05   1.957823e+03   5.790050e+09    395s
  190162    1.8666765e+05   1.897156e+03   5.561120e+09    401s
  191046    1.8669781e+05   1.861243e+03   6.916100e+09    405s
  192150    1.8668094e+05   1.724464e+03   7.561999e+10    411s
  193032    1.8669693e+05   1.681760e+03   5.802093e+09    415s
  194138    1.8664319e+05   1.631453e+03   5.791430e+09    421s
  195020    1.8666083e+05   1.597511e+03   5.093323e+09    425s
  196121    1.8664788e+05   1.520253e+03   5.853222e+10    431s
  197002    1.8667740e+05   1.488521e+03   3.932338e+09    436s
  197889    1.8668226e+05   1.394265e+03   1.438993e+10    440s
  198990    1.8671187e+05   1.324270e+03   5.545416e+10    446s
  200090    1.8672683e+05   1.255734e+03   1.519824e+10    451s
  200971    1.8674893e+05   1.228975e+03   8.459789e+09    455s
  202075    1.8667586e+05   1.178603e+03   6.293673e+09    461s
  202958    1.8667495e+05   1.134906e+03   1.347318e+10    465s
  204060    1.8662529e+05   1.079514e+03   4.890325e+09    471s
  204944    1.8659870e+05   1.031551e+03   7.111685e+09    475s
  205826    1.8661379e+05   9.980596e+02   2.599603e+10    480s
  206934    1.8663150e+05   9.399790e+02   6.435159e+09    486s
  207815    1.8659074e+05   9.157861e+02   1.409936e+10    490s
  208707    1.8656811e+05   8.476881e+02   9.075462e+09    495s
  209812    1.8655598e+05   7.800427e+02   4.185455e+10    501s
  210695    1.8653384e+05   7.253918e+02   3.762860e+10    505s
  211795    1.8650844e+05   6.724957e+02   1.127997e+10    511s
  212678    1.8655717e+05   6.311658e+02   8.953582e+09    515s
  213560    1.8655832e+05   5.658602e+02   1.710218e+11    520s
  214441    1.8659573e+05   5.218181e+02   1.274771e+10    525s
  215545    1.8664258e+05   4.471376e+02   5.181049e+10    531s
  216425    1.8666818e+05   4.107299e+02   1.812370e+10    535s
  217529    1.8666850e+05   3.616213e+02   4.180570e+10    541s
  218633    1.8665606e+05   2.915651e+02   2.709788e+10    546s
  219522    1.8665398e+05   2.592241e+02   9.184051e+09    550s
  220392    1.8665706e+05   2.348108e+02   5.657733e+09    555s
  221274    1.8665517e+05   2.163828e+02   1.791258e+10    560s
  222147    1.8666734e+05   1.933671e+02   2.412486e+09    566s
  223037    1.8666202e+05   1.596716e+02   1.347814e+10    570s
  223910    1.8666494e+05   1.414366e+02   4.453598e+10    575s
  224794    1.8666517e+05   1.227328e+02   3.844377e+11    580s
  225655    1.8666624e+05   1.008402e+02   2.995921e+10    585s
  226757    1.8665754e+05   8.123949e+01   1.151308e+10    591s
  227639    1.8661491e+05   7.328418e+01   7.324113e+11    596s
  228719    1.8653516e+05   6.358634e+01   6.467372e+10    601s
  229560    1.8654644e+05   5.712249e+01   1.155688e+10    606s
  230391    1.8650666e+05   4.997813e+01   1.119549e+10    611s
  231184    1.8649524e+05   4.549700e+01   1.051105e+10    616s
  231624    1.8646002e+05   4.347416e+01   5.719067e+11    620s
  232144    1.8644183e+05   4.195990e+01   5.115246e+10    626s
  232494    1.8641675e+05   4.088485e+01   3.932155e+10    630s
  232864    1.8635849e+05   3.568513e+01   5.800561e+10    635s
  233364    1.8625701e+05   3.385523e+01   1.654161e+10    641s
  233734    1.8623683e+05   3.275832e+01   2.666245e+10    645s
  234244    1.8619651e+05   3.149142e+01   1.990263e+10    651s
  234614    1.8613628e+05   3.063576e+01   8.683806e+11    655s
  234984    1.8609425e+05   2.978990e+01   4.831139e+11    660s
  235494    1.8608073e+05   2.902377e+01   2.926507e+10    666s
  235874    1.8607625e+05   2.838668e+01   3.408627e+11    671s
  236294    1.8607110e+05   2.713920e+01   3.672722e+10    675s
  236674    1.8605995e+05   2.653865e+01   1.492328e+12    680s
  237064    1.8606715e+05   2.611670e+01   1.373042e+10    686s
  237454    1.8606310e+05   2.555935e+01   1.166007e+11    691s
  237834    1.8604854e+05   2.503143e+01   1.269399e+11    696s
  238234    1.8603256e+05   2.406037e+01   5.650475e+10    701s
  238604    1.8603546e+05   2.363320e+01   4.820783e+10    706s
  238974    1.8600541e+05   2.297167e+01   5.135326e+10    711s
  239474    1.8596438e+05   2.183257e+01   2.053648e+10    716s
  239844    1.8593587e+05   2.145699e+01   2.668936e+10    721s
  240214    1.8588354e+05   2.089583e+01   1.716365e+11    726s
  240594    1.8586213e+05   1.984121e+01   1.736667e+11    731s
  240984    1.8585008e+05   1.901016e+01   1.691413e+11    736s
  241364    1.8589562e+05   1.781209e+01   3.969664e+10    740s
  241874    1.8584168e+05   1.702389e+01   4.265889e+10    747s
  242264    1.8582332e+05   1.625699e+01   1.759175e+11    751s
  242634    1.8578929e+05   1.606547e+01   2.036670e+10    756s
  242994    1.8580043e+05   1.586751e+01   1.340579e+11    761s
  243354    1.8576345e+05   1.515401e+01   2.535509e+10    766s
  243744    1.8574522e+05   1.740733e+01   1.851444e+12    772s
  244004    1.8571856e+05   1.401303e+01   2.419219e+12    775s
  244394    1.8568140e+05   1.307775e+01   5.704508e+11    781s
  244794    1.8566865e+05   1.476975e+01   1.106431e+12    786s
  245194    1.8566226e+05   1.244979e+01   1.814975e+10    791s
  245584    1.8564418e+05   1.199041e+01   9.949517e+10    797s
  245954    1.8563551e+05   1.171000e+01   1.823748e+12    802s
Warning: Markowitz tolerance tightened to 0.0625
  246214    1.8564201e+05   1.148015e+01   7.299891e+10    805s
  246504    1.8564189e+05   1.139556e+01   1.084369e+11    810s
  246764    1.8564422e+05   1.107322e+01   2.023808e+11    817s
  247024    1.8563946e+05   1.079576e+01   1.482089e+10    822s
  247284    1.8560982e+05   1.050139e+01   5.087048e+10    826s
  247694    1.8560885e+05   1.018526e+01   3.623216e+11    831s
  247954    1.8559650e+05   9.570785e+00   5.662408e+10    836s
  248364    1.8557351e+05   8.836481e+00   2.852328e+11    841s
  248755    1.8559022e+05   8.535647e+00   8.899886e+10    847s
  249015    1.8561727e+05   7.847137e+00   7.040676e+10    851s
  249405    1.8560610e+05   7.546617e+00   1.903231e+11    856s
  249665    1.8558301e+05   7.496584e+00   3.352072e+09    860s
  250055    1.8556708e+05   7.139414e+00   1.597238e+10    866s
  250335    1.8555789e+05   6.890722e+00   1.360821e+10    871s
  250765    1.8553629e+05   6.436104e+00   2.248658e+09    877s
  251045    1.8553856e+05   6.383071e+00   1.440343e+10    881s
  251465    1.8557047e+05   5.713765e+00   9.191366e+09    887s
  251745    1.8554500e+05   5.590575e+00   3.209212e+09    891s
  252165    1.8548986e+05   5.387923e+00   2.704302e+09    897s
  252455    1.8547776e+05   5.289538e+00   5.107755e+09    901s
  252715    1.8547805e+05   5.070617e+00   2.063836e+10    905s
  253125    1.8543623e+05   4.671895e+00   9.796057e+10    913s
  253265    1.8543353e+05   4.307509e+00   2.047010e+10    918s
  253405    1.8543401e+05   4.155408e+00   9.105084e+10    921s
  253815    1.8543247e+05   3.330486e+00   2.235687e+10    928s
  253945    1.8543625e+05   3.214457e+00   2.994807e+11    931s
  254215    1.8543831e+05   2.917506e+00   1.102451e+12    936s
  254475    1.8543994e+05   2.313365e+00   3.712719e+10    942s
  254755    1.8541483e+05   2.280610e+00   3.751747e+10    947s
  254895    1.8539665e+05   2.242246e+00   1.034877e+10    950s
  255305    1.8541791e+05   2.063813e+00   7.495526e+09    958s
  255445    1.8540853e+05   2.780463e+00   1.969473e+12    961s
  255725    1.8543057e+05   2.038004e+00   2.024434e+11    965s
  256155    1.8542811e+05   1.977862e+00   3.272120e+10    972s
  256435    1.8541908e+05   1.883360e+00   4.129224e+09    976s
  256715    1.8539116e+05   1.851388e+00   1.009122e+10    981s
  257015    1.8531397e+05   1.814500e+00   3.630747e+09    987s
  257295    1.8530401e+05   1.660973e+00   4.662511e+09    992s
  257575    1.8528771e+05   1.615145e+00   5.050369e+09    997s
  257865    1.8526325e+05   1.547213e+00   3.383612e+10   1002s
  258165    1.8522653e+05   1.466645e+00   5.989212e+09   1008s
  258315    1.8522079e+05   1.425855e+00   6.837440e+10   1010s
  258735    1.8521073e+05   1.328872e+00   1.459199e+10   1017s
  259015    1.8522308e+05   1.251218e+00   1.169284e+10   1021s
  259315    1.8522947e+05   1.176397e+00   2.286356e+10   1025s
  259605    1.8521538e+05   8.660580e-01   6.714199e+09   1031s
  259895    1.8520289e+05   8.549427e-01   1.424079e+09   1037s
  260195    1.8519916e+05   8.422071e-01   5.453427e+09   1042s
  260505    1.8521535e+05   8.206899e-01   1.477949e+09   1047s
  260805    1.8520037e+05   7.956245e-01   5.564157e+09   1053s
  261085    1.8519440e+05   7.761469e-01   7.417874e+09   1057s
  261355    1.8514302e+05   6.865800e-01   3.175453e+10   1062s
  261505    1.8513515e+05   2.752975e+01   3.357888e+13   1067s
  261785    1.8510792e+05   4.456093e-01   4.101381e+11   1072s
  262055    1.8502281e+05   3.487429e-02   9.097312e+10   1077s
  262086    1.8502271e+05   0.000000e+00   1.842786e+07   1078s
  262274    1.8490356e+05   0.000000e+00   8.716691e+07   1081s
  262604    1.8475613e+05   0.000000e+00   7.174921e+07   1086s
  262894    1.8462218e+05   0.000000e+00   3.476769e+07   1091s
  263184    1.8449180e+05   0.000000e+00   9.994797e+06   1097s
  263444    1.8429695e+05   0.000000e+00   4.386319e+08   1101s
  263714    1.8410458e+05   0.000000e+00   1.247043e+08   1106s
  264074    1.8387945e+05   0.000000e+00   9.915656e+06   1111s
  264344    1.8361279e+05   0.000000e+00   3.256195e+09   1116s
  264634    1.8327602e+05   0.000000e+00   1.042808e+08   1120s
  264924    1.8293191e+05   0.000000e+00   3.984499e+08   1125s
  265224    1.8273691e+05   0.000000e+00   6.906496e+07   1131s
  265524    1.8261991e+05   0.000000e+00   9.576359e+07   1136s
  265855    1.8231199e+05   0.000000e+00   2.154374e+07   1142s
  266175    1.8212163e+05   0.000000e+00   5.147882e+07   1148s
  266305    1.8190732e+05   0.000000e+00   9.543525e+07   1151s
  266605    1.8156296e+05   0.000000e+00   3.027931e+08   1156s
  266915    1.8145905e+05   0.000000e+00   8.146914e+06   1162s
  267215    1.8124344e+05   0.000000e+00   1.031673e+08   1167s
  267375    1.8122247e+05   0.000000e+00   1.622602e+07   1170s
  267695    1.8096746e+05   0.000000e+00   3.680660e+07   1177s
  267865    1.8082669e+05   0.000000e+00   3.457553e+07   1181s
  268205    1.8069867e+05   0.000000e+00   4.630135e+07   1186s
  268495    1.8035876e+05   0.000000e+00   4.019748e+07   1192s
  268645    1.8021939e+05   0.000000e+00   1.072439e+08   1195s
  268975    1.7989781e+05   0.000000e+00   2.462202e+07   1201s
  269315    1.7971061e+05   0.000000e+00   3.607220e+07   1207s
  269475    1.7948968e+05   0.000000e+00   2.443554e+08   1211s
  269805    1.7928474e+05   0.000000e+00   4.166538e+07   1216s
  270145    1.7891750e+05   0.000000e+00   1.055914e+07   1222s
  270315    1.7885453e+05   0.000000e+00   8.648432e+06   1225s

Interrupt request received


Root relaxation: interrupted, 270551 iterations, 1221.39 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0          -    0               - 27097.3333      -     - 1229s

Explored 0 nodes (270551 simplex iterations) in 1229.74 seconds
Thread count was 8 (of 8 available processors)

Solution count 0

Solve interrupted
Best objective -, best bound 2.709733333333e+04, gap -