Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:26:45 2013 Optimize a model with 2640 rows, 576240 columns and 1152240 nonzeros Presolve time: 2.10s Presolved: 2640 rows, 576240 columns, 1152240 nonzeros Variable types: 576000 continuous, 240 integer (240 binary) Root relaxation: objective 4.756444e+05, 14872 iterations, 2.44 seconds Total elapsed time = 5.01s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 475644.407 0 6 - 475644.407 - - 5s H 0 0 509252.00000 475644.407 6.60% - 6s H 0 0 479410.00000 475644.407 0.79% - 7s 0 0 475818.549 0 4 479410.000 475818.549 0.75% - 9s 0 0 475818.549 0 6 479410.000 475818.549 0.75% - 13s 0 0 475818.549 0 4 479410.000 475818.549 0.75% - 14s 0 0 475836.076 0 4 479410.000 475836.076 0.75% - 15s 0 0 475844.500 0 4 479410.000 475844.500 0.74% - 16s 0 0 475844.504 0 4 479410.000 475844.504 0.74% - 16s 0 0 475844.642 0 4 479410.000 475844.642 0.74% - 17s 0 0 475844.642 0 4 479410.000 475844.642 0.74% - 18s 0 0 475844.642 0 4 479410.000 475844.642 0.74% - 18s 0 2 475845.575 0 4 479410.000 475845.575 0.74% - 21s H 6 5 479189.00000 475913.838 0.68% 77.5 23s 8 9 476002.134 7 2 479189.000 475945.369 0.68% 158 25s H 13 11 476461.00000 475945.369 0.11% 155 27s H 17 9 476298.00000 475945.369 0.07% 133 28s * 18 7 17 476258.00000 475945.369 0.07% 127 28s 22 11 476098.602 4 2 476258.000 475973.051 0.06% 148 30s Cutting planes: Implied bound: 174 Flow cover: 7 Explored 52 nodes (32441 simplex iterations) in 34.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.762580000000e+05, best bound 4.762580000000e+05, gap 0.0%