Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:40:12 2013 Optimize a model with 156947 rows, 9604 columns and 475398 nonzeros Presolve removed 8471 rows and 4843 columns Presolve time: 2.13s Presolved: 148476 rows, 4761 columns, 449893 nonzeros Variable types: 47 continuous, 4714 integer (4714 binary) Found heuristic solution: objective 214758.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 31759 1.4412903e+05 0.000000e+00 3.618918e+06 5s 49119 1.5196927e+05 0.000000e+00 0.000000e+00 8s 49119 1.5196927e+05 0.000000e+00 0.000000e+00 8s Root relaxation: objective 1.519693e+05, 49119 iterations, 8.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 151969.267 0 20 214758.000 151969.267 29.2% - 11s H 0 0 152000.00000 151969.267 0.02% - 11s H 0 0 151982.00000 151969.267 0.01% - 11s Explored 0 nodes (49842 simplex iterations) in 11.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.519820000000e+05, best bound 1.519700000000e+05, gap 0.0079%