Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:34:46 2013 Optimize a model with 2200 rows, 103800 columns and 214900 nonzeros Presolve removed 100 rows and 1300 columns Presolve time: 0.31s Presolved: 2100 rows, 102500 columns, 212900 nonzeros Variable types: 102100 continuous, 400 integer (400 binary) Root relaxation: objective 8.951303e+05, 7458 iterations, 0.60 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 8 - 895130.293 - - 1s H 0 0 1022485.5503 895130.293 12.5% - 1s 0 0 895191.950 0 8 1022485.55 895191.950 12.4% - 1s 0 0 895214.857 0 8 1022485.55 895214.857 12.4% - 1s 0 0 895242.257 0 8 1022485.55 895242.257 12.4% - 2s 0 0 895246.544 0 8 1022485.55 895246.544 12.4% - 2s 0 0 895246.544 0 8 1022485.55 895246.544 12.4% - 2s 0 0 895251.855 0 8 1022485.55 895251.855 12.4% - 3s 0 0 895253.931 0 8 1022485.55 895253.931 12.4% - 3s 0 0 895256.746 0 8 1022485.55 895256.746 12.4% - 3s 0 0 895258.178 0 8 1022485.55 895258.178 12.4% - 3s 0 0 895258.178 0 8 1022485.55 895258.178 12.4% - 4s 0 0 895258.414 0 8 1022485.55 895258.414 12.4% - 4s 0 0 895258.414 0 8 1022485.55 895258.414 12.4% - 5s 0 2 895264.546 0 8 1022485.55 895264.546 12.4% - 6s 23 25 895903.945 23 2 1022485.55 895615.064 12.4% 52.8 10s H 27 16 898252.98116 895615.064 0.29% 46.9 10s 65 23 897604.422 65 2 898252.981 895615.064 0.29% 34.5 15s 123 57 897404.697 50 1 898252.981 895847.044 0.27% 32.7 20s H 135 65 897753.27960 895847.044 0.21% 30.4 20s 244 127 896705.315 5 3 897753.280 896356.582 0.16% 32.8 25s * 288 145 6 897719.60337 896546.546 0.13% 35.0 27s * 295 6 14 896634.43616 896582.089 0.01% 36.0 27s Cutting planes: Flow cover: 25 Explored 296 nodes (19946 simplex iterations) in 28.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.965820890370e+05, gap 0.0058%