Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:19:56 2013 Optimize a model with 2400 rows, 107100 columns and 233100 nonzeros Presolve removed 100 rows and 2500 columns Presolve time: 0.32s Presolved: 2300 rows, 104600 columns, 229100 nonzeros Variable types: 104100 continuous, 500 integer (500 binary) Root relaxation: objective 7.543716e+05, 5991 iterations, 0.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 754371.571 0 12 - 754371.571 - - 0s H 0 0 982042.73564 754371.571 23.2% - 1s 0 0 754448.397 0 12 982042.736 754448.397 23.2% - 1s 0 0 754486.829 0 6 982042.736 754486.829 23.2% - 2s 0 0 754502.381 0 12 982042.736 754502.381 23.2% - 2s 0 0 754506.414 0 9 982042.736 754506.414 23.2% - 2s 0 0 754507.034 0 12 982042.736 754507.034 23.2% - 2s 0 0 754508.123 0 12 982042.736 754508.123 23.2% - 3s 0 0 754510.206 0 12 982042.736 754510.206 23.2% - 3s 0 0 754510.482 0 12 982042.736 754510.482 23.2% - 4s 0 0 754511.726 0 12 982042.736 754511.726 23.2% - 4s 0 0 754512.187 0 12 982042.736 754512.187 23.2% - 4s 0 0 754512.187 0 12 982042.736 754512.187 23.2% - 6s 0 2 754522.601 0 12 982042.736 754522.601 23.2% - 7s H 27 24 757834.90286 754726.728 0.41% 74.9 10s H 54 29 756554.52029 754726.728 0.24% 45.4 14s 63 31 755791.210 62 3 756554.520 754726.728 0.24% 40.4 15s H 109 48 755695.71318 754769.728 0.12% 36.5 17s * 115 50 34 755679.58081 754769.728 0.12% 35.1 18s 130 52 755207.659 6 3 755679.581 754828.840 0.11% 41.5 20s 210 35 cutoff 6 755679.581 755308.763 0.05% 51.4 25s Cutting planes: Flow cover: 36 Explored 254 nodes (21212 simplex iterations) in 26.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556795808113e+05, best bound 7.556087070059e+05, gap 0.0094%