Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:14:37 2013 Optimize a model with 905 rows, 13460 columns and 637370 nonzeros Presolve removed 67 rows and 393 columns (presolve time = 5s) ... Presolve removed 67 rows and 393 columns Presolve time: 5.57s Presolved: 838 rows, 13067 columns, 613666 nonzeros Variable types: 0 continuous, 13067 integer (13067 binary) Found heuristic solution: objective 6873.0000000 Root relaxation: objective 5.294000e+03, 3064 iterations, 0.80 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5294.00000 0 24 6873.00000 5294.00000 23.0% - 6s H 0 0 6270.0000000 5294.00000 15.6% - 6s H 0 0 5746.0000000 5294.00000 7.87% - 7s H 0 0 5667.0000000 5294.00000 6.58% - 7s H 0 0 5631.0000000 5294.00000 5.98% - 7s 0 0 5347.00000 0 108 5631.00000 5347.00000 5.04% - 8s 0 0 5354.45455 0 174 5631.00000 5354.45455 4.91% - 9s * 0 0 0 5356.0000000 5356.00000 0.0% - 11s Cutting planes: Clique: 24 Zero half: 20 Explored 0 nodes (4744 simplex iterations) in 11.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.356000000000e+03, best bound 5.356000000000e+03, gap 0.0%