Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:15:32 2013 Optimize a model with 2600 rows, 113600 columns and 291300 nonzeros Presolve removed 100 rows and 2900 columns Presolve time: 0.35s Presolved: 2500 rows, 110700 columns, 281300 nonzeros Variable types: 110100 continuous, 600 integer (600 binary) Root relaxation: objective 7.543716e+05, 6059 iterations, 0.43 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 - - 1s 0 0 754439.856 0 12 - 754439.856 - - 1s 0 0 754466.223 0 9 - 754466.223 - - 1s 0 0 754474.923 0 12 - 754474.923 - - 2s 0 0 754475.652 0 12 - 754475.652 - - 2s 0 0 754476.019 0 11 - 754476.019 - - 2s 0 0 754476.117 0 9 - 754476.117 - - 3s 0 0 754477.087 0 12 - 754477.087 - - 3s 0 0 754478.182 0 9 - 754478.182 - - 3s 0 0 754479.292 0 12 - 754479.292 - - 3s 0 0 754479.676 0 12 - 754479.676 - - 4s 0 0 754480.333 0 12 - 754480.333 - - 4s 0 0 754480.761 0 12 - 754480.761 - - 4s 0 0 754480.761 0 12 - 754480.761 - - 6s H 0 0 757599.71403 754480.761 0.41% - 6s 0 2 754492.124 0 12 757599.714 754492.124 0.41% - 7s 12 13 755098.805 11 5 757599.714 754719.728 0.38% 127 10s 57 35 756099.746 56 4 757599.714 754719.728 0.38% 39.3 15s 88 38 757475.927 85 3 757599.714 754719.728 0.38% 33.0 20s * 93 37 88 757554.74355 754719.728 0.37% 32.2 20s H 135 60 755693.12749 754769.728 0.12% 32.7 21s * 147 63 53 755679.58081 754769.728 0.12% 31.0 22s 182 69 755274.624 12 6 755679.581 754848.804 0.11% 35.9 25s 302 63 cutoff 26 755679.581 755226.406 0.06% 38.9 30s Cutting planes: Flow cover: 34 Explored 426 nodes (25176 simplex iterations) in 34.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.556795808113e+05, best bound 7.556250937121e+05, gap 0.0072%