Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:57:15 2013 Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros Presolve removed 5516 rows and 1710 columns Presolve time: 0.23s Presolved: 25397 rows, 1539 columns, 77212 nonzeros Variable types: 19 continuous, 1520 integer (1520 binary) Found heuristic solution: objective 62116.000000 Root relaxation: objective 5.010750e+04, 5011 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50107.5000 0 6 62116.0000 50107.5000 19.3% - 0s H 0 0 50122.000000 50107.5000 0.03% - 0s H 0 0 50116.000000 50107.5000 0.02% - 0s H 0 0 50115.000000 50107.5000 0.01% - 0s 0 0 50110.8873 0 18 50115.0000 50110.8873 0.01% - 0s Cutting planes: Gomory: 1 Implied bound: 1 MIR: 5 Explored 0 nodes (5060 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.011500000000e+04, best bound 5.011100000000e+04, gap 0.0080%