Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:06:30 2013 Optimize a model with 67599 rows, 5476 columns and 205350 nonzeros Presolve removed 6461 rows and 2804 columns Presolve time: 0.46s Presolved: 61138 rows, 2672 columns, 185118 nonzeros Variable types: 24 continuous, 2648 integer (2648 binary) Found heuristic solution: objective 135988.00000 Root relaxation: objective 1.093909e+05, 9699 iterations, 0.97 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 109390.889 0 12 135988.000 109390.889 19.6% - 1s H 0 0 109421.00000 109390.889 0.03% - 1s H 0 0 109400.00000 109390.889 0.01% - 1s Explored 0 nodes (9736 simplex iterations) in 1.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.094000000000e+05, best bound 1.093910000000e+05, gap 0.0082%