Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:41:56 2013 Optimize a model with 161799 rows, 9801 columns and 490050 nonzeros Presolve removed 8544 rows and 4947 columns Presolve time: 2.03s Presolved: 153255 rows, 4854 columns, 463699 nonzeros Variable types: 41 continuous, 4813 integer (4813 binary) Found heuristic solution: objective 235919.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 30828 1.7746864e+05 0.000000e+00 3.834981e+05 5s 32932 1.7872378e+05 0.000000e+00 0.000000e+00 6s 32932 1.7872378e+05 0.000000e+00 0.000000e+00 6s Root relaxation: objective 1.787238e+05, 32932 iterations, 5.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 178723.778 0 10 235919.000 178723.778 24.2% - 8s H 0 0 178732.00000 178723.778 0.00% - 8s Explored 0 nodes (33100 simplex iterations) in 8.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.787320000000e+05, best bound 1.787240000000e+05, gap 0.0045%