Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:08 2013 Optimize a model with 600 rows, 14440 columns and 96340 nonzeros Presolve removed 20 rows and 2260 columns Presolve time: 0.22s Presolved: 580 rows, 12180 columns, 88340 nonzeros Variable types: 12020 continuous, 160 integer (160 binary) Root relaxation: objective 3.709539e+04, 461 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37095.3933 0 20 - 37095.3933 - - 0s 0 0 37096.3819 0 20 - 37096.3819 - - 0s 0 0 37096.4854 0 15 - 37096.4854 - - 0s 0 0 37096.4854 0 15 - 37096.4854 - - 0s 0 0 37096.5983 0 20 - 37096.5983 - - 0s 0 0 37096.6167 0 15 - 37096.6167 - - 0s 0 0 37096.6167 0 15 - 37096.6167 - - 0s 0 0 37096.6167 0 15 - 37096.6167 - - 0s 0 0 37096.6167 0 15 - 37096.6167 - - 1s 0 2 37098.3417 0 15 - 37098.3417 - - 1s * 59 41 52 37304.861961 37102.5651 0.54% 7.0 2s * 80 49 20 37303.271667 37116.1956 0.50% 6.7 2s * 101 51 16 37302.292666 37120.8757 0.49% 6.4 2s * 159 28 15 37254.691025 37146.7375 0.29% 5.7 2s * 185 22 15 37254.136767 37179.3116 0.20% 5.9 2s * 220 27 22 37253.699547 37238.2459 0.04% 5.7 2s * 290 27 13 37253.494793 37244.2732 0.02% 5.0 2s Cutting planes: Flow cover: 12 Explored 368 nodes (2805 simplex iterations) in 3.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.725349479311e+04, best bound 3.725003905430e+04, gap 0.0093%