Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:19:50 2013 Optimize a model with 1760 rows, 256160 columns and 512160 nonzeros Presolve time: 0.68s Presolved: 1760 rows, 256160 columns, 512160 nonzeros Variable types: 256000 continuous, 160 integer (160 binary) Root relaxation: objective 2.834424e+05, 7622 iterations, 0.67 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 283442.442 0 6 - 283442.442 - - 1s H 0 0 296207.00000 283442.442 4.31% - 1s H 0 0 288687.00000 283442.442 1.82% - 2s 0 0 283946.900 0 4 288687.000 283946.900 1.64% - 3s 0 0 283946.900 0 6 288687.000 283946.900 1.64% - 4s 0 0 283946.900 0 4 288687.000 283946.900 1.64% - 5s 0 0 283982.291 0 3 288687.000 283982.291 1.63% - 6s 0 0 283993.622 0 3 288687.000 283993.622 1.63% - 6s 0 0 283993.786 0 3 288687.000 283993.786 1.63% - 6s 0 0 283994.236 0 4 288687.000 283994.236 1.63% - 7s 0 0 283995.467 0 3 288687.000 283995.467 1.63% - 7s 0 0 283995.467 0 3 288687.000 283995.467 1.63% - 8s 0 0 283996.281 0 4 288687.000 283996.281 1.62% - 8s 0 0 283996.639 0 4 288687.000 283996.639 1.62% - 8s 0 2 284000.471 0 4 288687.000 284000.471 1.62% - 10s H 7 7 284772.00000 284210.012 0.20% 245 12s H 10 9 284534.00000 284252.418 0.10% 195 12s * 13 7 10 284474.00000 284252.418 0.08% 159 12s Cutting planes: Implied bound: 125 Flow cover: 3 Explored 28 nodes (17950 simplex iterations) in 13.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.844740000000e+05, best bound 2.844740000000e+05, gap 0.0%