Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:52:33 2013 Optimize a model with 12383 rows, 1764 columns and 37926 nonzeros Presolve removed 1240 rows and 893 columns Presolve time: 0.06s Presolved: 11143 rows, 871 columns, 34170 nonzeros Variable types: 19 continuous, 852 integer (852 binary) Found heuristic solution: objective 46296.000000 Root relaxation: objective 3.733996e+04, 3589 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37339.9643 0 7 46296.0000 37339.9643 19.3% - 0s H 0 0 37350.000000 37339.9643 0.03% - 0s 0 0 37340.6966 0 19 37350.0000 37340.6966 0.02% - 0s 0 0 37340.6966 0 8 37350.0000 37340.6966 0.02% - 0s H 0 0 37348.000000 37340.6966 0.02% - 0s 0 0 37341.0440 0 22 37348.0000 37341.0440 0.02% - 0s H 0 0 37347.000000 37341.0440 0.02% - 0s 0 1 37341.0440 0 22 37347.0000 37341.0440 0.02% - 0s H 1 1 37345.000000 37341.0440 0.01% 0.0 0s Cutting planes: Gomory: 1 Cover: 1 Implied bound: 1 MIR: 4 Zero half: 1 Explored 4 nodes (3798 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.734500000000e+04, best bound 3.734300000000e+04, gap 0.0054%