Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:51 2013 Optimize a model with 660 rows, 36060 columns and 72060 nonzeros Presolve time: 0.05s Presolved: 660 rows, 36060 columns, 72060 nonzeros Variable types: 36000 continuous, 60 integer (60 binary) Root relaxation: objective 6.759446e+04, 1462 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67594.4557 0 7 - 67594.4557 - - 0s H 0 0 70166.000000 67594.4557 3.66% - 0s 0 0 67989.2387 0 6 70166.0000 67989.2387 3.10% - 0s H 0 0 69897.000000 67989.2387 2.73% - 0s 0 0 68084.0964 0 6 69897.0000 68084.0964 2.59% - 0s H 0 0 69759.000000 68084.0964 2.40% - 0s 0 0 68120.5874 0 4 69759.0000 68120.5874 2.35% - 0s 0 0 68147.3614 0 5 69759.0000 68147.3614 2.31% - 0s 0 0 68203.0461 0 4 69759.0000 68203.0461 2.23% - 0s H 0 0 69630.000000 68203.0461 2.05% - 0s 0 0 68206.1850 0 3 69630.0000 68206.1850 2.04% - 0s H 0 0 68775.000000 68206.1850 0.83% - 0s 0 0 68206.1850 0 3 68775.0000 68206.1850 0.83% - 0s 0 0 68206.1850 0 3 68775.0000 68206.1850 0.83% - 0s 0 0 68206.1850 0 3 68775.0000 68206.1850 0.83% - 0s 0 0 68206.1850 0 7 68775.0000 68206.1850 0.83% - 1s 0 0 68206.1850 0 6 68775.0000 68206.1850 0.83% - 1s 0 0 68206.1850 0 6 68775.0000 68206.1850 0.83% - 1s 0 0 68206.1850 0 4 68775.0000 68206.1850 0.83% - 1s 0 0 68206.1850 0 5 68775.0000 68206.1850 0.83% - 1s 0 0 68206.1850 0 4 68775.0000 68206.1850 0.83% - 1s 0 0 68206.1850 0 3 68775.0000 68206.1850 0.83% - 1s H 0 0 68765.000000 68206.1850 0.81% - 1s 0 0 68206.1850 0 3 68765.0000 68206.1850 0.81% - 1s 0 0 68206.1850 0 3 68765.0000 68206.1850 0.81% - 1s 0 0 68206.1850 0 3 68765.0000 68206.1850 0.81% - 1s H 0 0 68738.000000 68206.1850 0.77% - 1s 0 2 68207.5586 0 3 68738.0000 68207.5586 0.77% - 1s H 5 5 68579.000000 68291.7558 0.42% 49.2 1s H 7 6 68555.000000 68291.7558 0.38% 46.6 1s H 8 7 68459.000000 68291.7558 0.24% 42.9 1s H 9 6 68449.250000 68291.7558 0.23% 38.9 1s * 10 6 8 68446.000000 68291.7558 0.23% 36.8 1s Cutting planes: Implied bound: 109 Flow cover: 8 Explored 27 nodes (4742 simplex iterations) in 2.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.844600000000e+04, best bound 6.844600000000e+04, gap 0.0%