Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:47:02 2013 Optimize a model with 221925 rows, 12100 columns and 671550 nonzeros Presolve removed 19112 rows and 6194 columns Presolve time: 3.10s Presolved: 202813 rows, 5906 columns, 612289 nonzeros Variable types: 36 continuous, 5870 integer (5870 binary) Found heuristic solution: objective 281062.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 25300 2.2178553e+05 0.000000e+00 3.817455e+06 5s 32436 2.2520073e+05 0.000000e+00 0.000000e+00 7s 32436 2.2520073e+05 0.000000e+00 0.000000e+00 7s Root relaxation: objective 2.252007e+05, 32436 iterations, 6.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 225200.733 0 12 281062.000 225200.733 19.9% - 10s H 0 0 225214.00000 225200.733 0.01% - 10s Explored 0 nodes (32635 simplex iterations) in 10.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.252140000000e+05, best bound 2.252010000000e+05, gap 0.0058%