Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:01:21 2013 Optimize a model with 47971 rows, 4356 columns and 145926 nonzeros Presolve removed 4476 rows and 2217 columns Presolve time: 0.38s Presolved: 43495 rows, 2139 columns, 132433 nonzeros Variable types: 31 continuous, 2108 integer (2108 binary) Found heuristic solution: objective 82414.000000 Root relaxation: objective 6.257673e+04, 16966 iterations, 1.49 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62576.7333 0 10 82414.0000 62576.7333 24.1% - 2s H 0 0 62594.000000 62576.7333 0.03% - 2s H 0 0 62590.000000 62576.7333 0.02% - 2s H 0 0 62585.000000 62576.7333 0.01% - 2s 0 0 62576.7333 0 22 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 15 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 25 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 22 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 36 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 34 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 30 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 35 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 36 62585.0000 62576.7333 0.01% - 2s 0 0 62576.7333 0 36 62585.0000 62576.7333 0.01% - 2s 0 2 62576.7333 0 30 62585.0000 62576.7333 0.01% - 2s * 2698 1207 47 62584.000000 62577.1754 0.01% 14.2 4s 2730 1220 62578.0504 24 28 62584.0000 62577.1754 0.01% 14.2 5s * 3460 1409 39 62583.000000 62577.1754 0.01% 13.4 5s Cutting planes: MIR: 9 Explored 3461 nodes (67765 simplex iterations) in 5.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.258300000000e+04, best bound 6.257800000000e+04, gap 0.0080%