Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:34:23 2013 Optimize a model with 2625 rows, 625 columns and 8125 nonzeros Presolve removed 574 rows and 325 columns Presolve time: 0.02s Presolved: 2051 rows, 300 columns, 6416 nonzeros Variable types: 12 continuous, 288 integer (288 binary) Found heuristic solution: objective 12201.000000 Root relaxation: objective 8.831495e+03, 1614 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8831.49451 0 10 12201.0000 8831.49451 27.6% - 0s H 0 0 8861.0000000 8831.49451 0.33% - 0s H 0 0 8843.0000000 8831.49451 0.13% - 0s H 0 0 8837.0000000 8831.49451 0.06% - 0s 0 0 8833.06316 0 19 8837.00000 8833.06316 0.04% - 0s 0 0 8833.06316 0 7 8837.00000 8833.06316 0.04% - 0s H 0 0 8835.0000000 8833.06316 0.02% - 0s 0 0 8833.51843 0 18 8835.00000 8833.51843 0.02% - 0s 0 1 8833.56392 0 18 8835.00000 8833.56392 0.02% - 0s Explored 3 nodes (1758 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.835000000000e+03, best bound 8.835000000000e+03, gap 0.0%