Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:54:08 2013 Optimize a model with 17343 rows, 2209 columns and 53016 nonzeros Presolve removed 2505 rows and 1143 columns Presolve time: 0.13s Presolved: 14838 rows, 1066 columns, 45306 nonzeros Variable types: 18 continuous, 1048 integer (1048 binary) Found heuristic solution: objective 39520.000000 Root relaxation: objective 3.008604e+04, 3310 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30086.0449 0 10 39520.0000 30086.0449 23.9% - 0s H 0 0 30090.000000 30086.0449 0.01% - 0s 0 0 30087.2363 0 20 30090.0000 30087.2363 0.01% - 0s Cutting planes: Gomory: 6 MIR: 6 Zero half: 2 Explored 0 nodes (3370 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.009000000000e+04, best bound 3.008800000000e+04, gap 0.0066%