Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:06:20 2013 Optimize a model with 67599 rows, 5476 columns and 205350 nonzeros Presolve removed 15091 rows and 2948 columns Presolve time: 0.61s Presolved: 52508 rows, 2528 columns, 159086 nonzeros Variable types: 22 continuous, 2506 integer (2506 binary) Found heuristic solution: objective 127894.00000 Root relaxation: objective 1.099832e+05, 7482 iterations, 0.69 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 109983.189 0 7 127894.000 109983.189 14.0% - 1s H 0 0 109988.00000 109983.189 0.00% - 1s Explored 0 nodes (7492 simplex iterations) in 1.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.099880000000e+05, best bound 1.099840000000e+05, gap 0.0036%