Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:56 2013 Optimize a model with 480 rows, 4560 columns and 11180 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 460 rows, 4540 columns, 10760 nonzeros Variable types: 4440 continuous, 100 integer (100 binary) Root relaxation: objective 3.894400e+04, 543 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38944.0027 0 6 - 38944.0027 - - 0s 0 0 38971.6370 0 8 - 38971.6370 - - 0s 0 0 38971.6370 0 8 - 38971.6370 - - 0s 0 0 38972.3551 0 8 - 38972.3551 - - 0s 0 0 38972.9494 0 8 - 38972.9494 - - 0s 0 0 38973.7926 0 8 - 38973.7926 - - 0s 0 0 38973.7926 0 10 - 38973.7926 - - 0s 0 0 38973.7926 0 8 - 38973.7926 - - 0s H 0 0 42698.654635 38973.7926 8.72% - 0s 0 2 38976.7256 0 6 42698.6546 38976.7256 8.72% - 0s * 20 12 20 39522.348769 39086.3668 1.10% 9.2 0s * 41 6 14 39252.122380 39246.3764 0.01% 8.0 0s * 45 0 8 39246.875698 39246.8757 0.0% 7.3 0s Cutting planes: Gomory: 1 Flow cover: 3 Explored 46 nodes (1154 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.924687569829e+04, best bound 3.924687569829e+04, gap 0.0%