Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:20:10 2013 Optimize a model with 2640 rows, 576240 columns and 1152240 nonzeros Presolve time: 2.25s Presolved: 2640 rows, 576240 columns, 1152240 nonzeros Variable types: 576000 continuous, 240 integer (240 binary) Root relaxation: objective 5.012870e+05, 17499 iterations, 3.50 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 501287.035 0 4 - 501287.035 - - 6s H 0 0 511239.00000 501287.035 1.95% - 7s H 0 0 504242.00000 501287.035 0.59% - 9s 0 0 501365.403 0 3 504242.000 501365.403 0.57% - 10s 0 0 501365.403 0 4 504242.000 501365.403 0.57% - 13s 0 0 501367.569 0 3 504242.000 501367.569 0.57% - 15s 0 0 501370.157 0 4 504242.000 501370.157 0.57% - 15s 0 0 501370.698 0 3 504242.000 501370.698 0.57% - 16s 0 0 501371.022 0 4 504242.000 501371.022 0.57% - 16s 0 0 501371.099 0 3 504242.000 501371.099 0.57% - 17s 0 0 501371.099 0 3 504242.000 501371.099 0.57% - 17s 0 2 501382.825 0 3 504242.000 501382.825 0.57% - 19s 1 4 501399.640 1 4 504242.000 501399.640 0.56% 196 20s H 4 4 502478.96296 501428.553 0.21% 82.5 21s H 10 9 502466.00000 501449.728 0.20% 76.7 22s H 11 10 502400.00000 501449.728 0.19% 80.6 23s H 17 11 501943.00000 501449.728 0.10% 73.6 23s H 19 11 501851.00000 501449.728 0.08% 66.4 24s * 22 11 20 501845.00000 501449.728 0.08% 58.3 24s H 26 11 501810.00000 501459.811 0.07% 58.5 24s H 27 10 501758.00000 501459.811 0.06% 56.6 25s * 31 11 12 501674.00000 501459.811 0.04% 52.8 25s Cutting planes: Implied bound: 64 Flow cover: 5 Explored 43 nodes (27638 simplex iterations) in 26.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.016740000000e+05, best bound 5.016261900826e+05, gap 0.0095%