Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:26:22 2013 Optimize a model with 125671 rows, 8281 columns and 380926 nonzeros Presolve removed 11699 rows and 4245 columns Presolve time: 1.38s Presolved: 113972 rows, 4036 columns, 344464 nonzeros Variable types: 29 continuous, 4007 integer (4007 binary) Found heuristic solution: objective 199960.00000 Root relaxation: objective 1.605317e+05, 16817 iterations, 1.98 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 160531.651 0 9 199960.000 160531.651 19.7% - 3s H 0 0 160546.00000 160531.651 0.01% - 3s Explored 0 nodes (16837 simplex iterations) in 3.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.605460000000e+05, best bound 1.605320000000e+05, gap 0.0087%