Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:22:35 2013 Optimize a model with 9177 rows, 1444 columns and 28158 nonzeros Presolve removed 2146 rows and 770 columns Presolve time: 0.07s Presolved: 7031 rows, 674 columns, 21544 nonzeros Variable types: 13 continuous, 661 integer (661 binary) Found heuristic solution: objective 28657.000000 Root relaxation: objective 2.340000e+04, 1674 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 23400.0000 0 1 28657.0000 23400.0000 18.3% - 0s H 0 0 23403.000000 23400.0000 0.01% - 0s H 0 0 23400.000000 23400.0000 0.0% - 0s Explored 0 nodes (1689 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.340000000000e+04, best bound 2.340000000000e+04, gap 0.0%