Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:40:45 2013 Optimize a model with 2600 rows, 105900 columns and 242200 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.30s Presolved: 2500 rows, 105800 columns, 237100 nonzeros Variable types: 105200 continuous, 600 integer (600 binary) Root relaxation: objective 9.053666e+05, 6302 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 6 - 905366.638 - - 1s 0 0 905393.238 0 6 - 905393.238 - - 1s 0 0 905423.636 0 6 - 905423.636 - - 1s 0 0 905432.687 0 6 - 905432.687 - - 2s 0 0 905433.853 0 6 - 905433.853 - - 2s 0 0 905442.244 0 6 - 905442.244 - - 2s 0 0 905442.786 0 6 - 905442.786 - - 2s 0 0 905443.451 0 6 - 905443.451 - - 3s 0 0 905444.829 0 6 - 905444.829 - - 3s 0 0 905445.732 0 6 - 905445.732 - - 3s 0 0 905446.084 0 6 - 905446.084 - - 4s 0 0 905446.828 0 6 - 905446.828 - - 4s 0 0 905446.828 0 6 - 905446.828 - - 5s H 0 0 928813.78456 905446.828 2.52% - 5s 0 2 905461.763 0 6 928813.785 905461.763 2.51% - 6s 8 10 907496.339 8 3 928813.785 905624.164 2.50% 167 10s H 27 10 908085.54908 905624.164 0.27% 65.4 13s * 30 7 30 908070.70269 905624.164 0.27% 60.4 13s 35 11 906706.495 4 3 908070.703 906469.912 0.18% 86.1 15s * 45 13 14 908018.35356 906469.912 0.17% 79.7 15s 66 11 907913.248 11 6 908018.354 906871.471 0.13% 89.0 20s Cutting planes: Flow cover: 22 Explored 129 nodes (18711 simplex iterations) in 24.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080183535562e+05, best bound 9.079416797275e+05, gap 0.0084%