Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:52:50 2013 Optimize a model with 3200 rows, 151200 columns and 753100 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 1.56s Presolved: 3100 rows, 151100 columns, 703000 nonzeros Variable types: 150200 continuous, 900 integer (900 binary) Root relaxation: objective 7.672886e+05, 6385 iterations, 0.92 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 767288.564 0 9 - 767288.564 - - 3s 0 0 767303.263 0 9 - 767303.263 - - 4s 0 0 767306.562 0 9 - 767306.562 - - 4s 0 0 767306.605 0 9 - 767306.605 - - 5s 0 0 767306.605 0 9 - 767306.605 - - 6s 0 0 767306.605 0 9 - 767306.605 - - 6s 0 0 767306.605 0 9 - 767306.605 - - 9s 0 2 767308.437 0 9 - 767308.437 - - 19s 1 3 767377.828 1 3 - 767377.828 - 378 20s 27 29 768346.752 25 3 - 767390.010 - 43.7 25s 49 51 768391.309 47 1 - 767390.010 - 26.7 30s 75 77 768418.418 73 1 - 767390.010 - 18.7 35s 102 104 768453.547 100 1 - 767390.010 - 14.4 40s 137 139 768502.298 135 1 - 767390.010 - 11.4 45s 171 173 768569.676 169 1 - 767390.010 - 9.5 50s 235 237 768713.232 233 1 - 767390.010 - 7.4 55s * 308 68 306 768804.58464 767390.010 0.18% 6.0 58s 325 73 768083.428 10 3 768804.585 767808.496 0.13% 8.1 60s H 340 24 768490.17030 767808.496 0.09% 8.1 60s * 354 28 37 768367.90657 767808.496 0.07% 8.0 61s H 394 36 768356.28975 768002.096 0.05% 9.2 62s * 411 37 48 768356.20070 768002.096 0.05% 9.0 63s 448 47 768102.735 7 2 768356.201 768034.647 0.04% 8.8 65s * 474 57 33 768354.73932 768034.647 0.04% 8.7 65s * 516 47 27 768354.27442 768071.944 0.04% 8.6 67s Cutting planes: Flow cover: 10 Explored 548 nodes (12718 simplex iterations) in 68.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.683542744232e+05, best bound 7.682789874060e+05, gap 0.0098%