Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:06:20 2013 Optimize a model with 1750 rows, 58511 columns and 2654424 nonzeros Presolve removed 26 rows and 197 columns (presolve time = 5s) ... Presolve removed 30 rows and 249 columns Presolve time: 8.47s Presolved: 1720 rows, 58262 columns, 2643151 nonzeros Variable types: 0 continuous, 58262 integer (58262 binary) Found heuristic solution: objective 28421.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8604 1.9687136e+04 2.304377e+03 0.000000e+00 5s 12541 1.9860343e+04 1.975931e+02 0.000000e+00 10s 15208 1.9901841e+04 1.737024e+02 0.000000e+00 15s 16330 1.9910000e+04 0.000000e+00 0.000000e+00 18s Root relaxation: objective 1.991000e+04, 16330 iterations, 17.92 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 19910.000000 19910.0000 0.0% - 26s Explored 0 nodes (16330 simplex iterations) in 26.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.991000000000e+04, best bound 1.991000000000e+04, gap 0.0%