Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:54:18 2013 Optimize a model with 1227 rows, 31264 columns and 1235421 nonzeros Presolve removed 14 rows and 54 columns Presolve time: 3.32s Presolved: 1213 rows, 31210 columns, 1233709 nonzeros Variable types: 0 continuous, 31210 integer (31210 binary) Found heuristic solution: objective 17548.000000 Root relaxation: objective 9.744000e+03, 6110 iterations, 2.95 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 9744.0000000 9744.00000 0.0% - 6s Explored 0 nodes (6110 simplex iterations) in 6.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.743999999999e+03, best bound 9.743999999999e+03, gap 0.0%