Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:04:30 2013 Optimize a model with 59711 rows, 5041 columns and 181476 nonzeros Presolve removed 4280 rows and 2551 columns Presolve time: 0.26s Presolved: 55431 rows, 2490 columns, 168401 nonzeros Variable types: 31 continuous, 2459 integer (2459 binary) Found heuristic solution: objective 112427.00000 Root relaxation: objective 8.578455e+04, 16017 iterations, 1.50 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 85784.5538 0 8 112427.000 85784.5538 23.7% - 2s H 0 0 85798.000000 85784.5538 0.02% - 2s H 0 0 85796.000000 85784.5538 0.01% - 2s 0 0 85787.3809 0 27 85796.0000 85787.3809 0.01% - 2s 0 0 85787.3809 0 10 85796.0000 85787.3809 0.01% - 2s 0 0 85787.6835 0 27 85796.0000 85787.6835 0.01% - 2s Cutting planes: Gomory: 5 Implied bound: 1 MIR: 11 Zero half: 1 Explored 0 nodes (17457 simplex iterations) in 2.80 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.579600000000e+04, best bound 8.578800000000e+04, gap 0.0093%