Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:46:37 2013 Optimize a model with 814 rows, 54834 columns and 109594 nonzeros Presolve time: 0.08s Presolved: 814 rows, 54834 columns, 109594 nonzeros Variable types: 54760 continuous, 74 integer (74 binary) Root relaxation: objective 7.424359e+04, 1823 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74243.5907 0 7 - 74243.5907 - - 0s H 0 0 76934.000000 74243.5907 3.50% - 0s 0 0 74329.2001 0 3 76934.0000 74329.2001 3.39% - 0s 0 0 74346.7158 0 3 76934.0000 74346.7158 3.36% - 0s 0 0 74352.0149 0 3 76934.0000 74352.0149 3.36% - 0s 0 0 74353.7649 0 3 76934.0000 74353.7649 3.35% - 0s 0 0 74353.7649 0 3 76934.0000 74353.7649 3.35% - 0s H 0 0 74490.000000 74353.7649 0.18% - 0s 0 0 74353.7649 0 3 74490.0000 74353.7649 0.18% - 0s 0 0 74353.7649 0 7 74490.0000 74353.7649 0.18% - 1s 0 0 74353.7649 0 3 74490.0000 74353.7649 0.18% - 1s 0 0 74353.7649 0 3 74490.0000 74353.7649 0.18% - 1s 0 0 74353.7649 0 3 74490.0000 74353.7649 0.18% - 1s 0 0 74353.8196 0 3 74490.0000 74353.8196 0.18% - 1s 0 0 74353.8196 0 3 74490.0000 74353.8196 0.18% - 1s 0 0 74353.8196 0 3 74490.0000 74353.8196 0.18% - 1s 0 0 74356.3845 0 4 74490.0000 74356.3845 0.18% - 1s 0 0 74356.4220 0 3 74490.0000 74356.4220 0.18% - 1s 0 0 74356.4220 0 3 74490.0000 74356.4220 0.18% - 1s 0 0 74356.4220 0 3 74490.0000 74356.4220 0.18% - 1s 0 2 74357.6594 0 3 74490.0000 74357.6594 0.18% - 1s Cutting planes: Implied bound: 44 Flow cover: 6 Explored 12 nodes (3872 simplex iterations) in 2.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.449000000000e+04, best bound 7.449000000000e+04, gap 0.0%