Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:36:21 2013 Optimize a model with 147536 rows, 9216 columns and 446976 nonzeros Presolve removed 9030 rows and 4664 columns Presolve time: 1.80s Presolved: 138506 rows, 4552 columns, 419230 nonzeros Variable types: 40 continuous, 4512 integer (4512 binary) Found heuristic solution: objective 187289.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 34650 1.3775934e+05 0.000000e+00 2.272282e+04 5s 34942 1.3776092e+05 0.000000e+00 0.000000e+00 5s 34942 1.3776092e+05 0.000000e+00 0.000000e+00 5s Root relaxation: objective 1.377609e+05, 34942 iterations, 5.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 137760.917 0 10 187289.000 137760.917 26.4% - 7s H 0 0 137775.00000 137760.917 0.01% - 7s H 0 0 137773.00000 137760.917 0.01% - 7s Explored 0 nodes (35230 simplex iterations) in 8.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.377730000000e+05, best bound 1.377610000000e+05, gap 0.0087%