Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:58:23 2013 Optimize a model with 3200 rows, 151200 columns and 753100 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.92s Presolved: 3100 rows, 151100 columns, 703000 nonzeros Variable types: 150200 continuous, 900 integer (900 binary) Root relaxation: objective 9.188392e+05, 6660 iterations, 0.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 12 - 918839.221 - - 1s 0 0 918856.671 0 12 - 918856.671 - - 2s 0 0 918867.812 0 16 - 918867.812 - - 3s 0 0 918869.030 0 16 - 918869.030 - - 4s 0 0 918869.579 0 16 - 918869.579 - - 4s 0 0 918870.389 0 16 - 918870.389 - - 5s 0 0 918870.613 0 14 - 918870.613 - - 5s 0 0 918870.613 0 15 - 918870.613 - - 6s 0 0 918870.640 0 16 - 918870.640 - - 7s 0 0 918870.865 0 16 - 918870.865 - - 8s 0 0 918871.059 0 16 - 918871.059 - - 9s 0 0 918871.059 0 16 - 918871.059 - - 12s 0 2 918875.354 0 16 - 918875.354 - - 19s 1 3 918893.867 1 13 - 918893.867 - 327 20s 23 25 919427.734 22 1 - 918895.046 - 43.2 25s 46 48 919599.929 45 1 - 918895.046 - 23.2 30s 72 74 919829.103 71 1 - 918895.046 - 15.9 35s 99 101 920108.820 98 1 - 918895.046 - 12.3 40s 127 129 920427.356 126 1 - 918895.046 - 10.1 45s 164 166 921086.984 163 1 - 918895.046 - 8.2 50s * 189 30 188 921551.49320 918895.046 0.29% 7.4 52s 207 33 919272.636 15 3 921551.493 918912.334 0.29% 11.5 55s H 220 11 919386.04119 918912.334 0.05% 11.0 57s H 247 17 919376.69264 918912.334 0.05% 10.2 58s * 260 21 67 919374.46493 918912.334 0.05% 9.8 59s 270 23 919370.618 9 3 919374.465 918973.501 0.04% 11.6 60s Cutting planes: Flow cover: 25 Explored 315 nodes (13998 simplex iterations) in 62.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193744649273e+05, best bound 9.192842681540e+05, gap 0.0098%