Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:37:14 2013 Optimize a model with 152193 rows, 9409 columns and 461041 nonzeros Presolve removed 10195 rows and 4775 columns Presolve time: 1.71s Presolved: 141998 rows, 4634 columns, 429471 nonzeros Variable types: 37 continuous, 4597 integer (4597 binary) Found heuristic solution: objective 207439.00000 Root relaxation: objective 1.620861e+05, 26071 iterations, 4.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 162086.111 0 18 207439.000 162086.111 21.9% - 6s H 0 0 162100.00000 162086.111 0.01% - 6s Explored 0 nodes (26143 simplex iterations) in 6.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.621000000000e+05, best bound 1.620870000000e+05, gap 0.0080%