Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:35 2013

Optimize a model with 280 rows, 4100 columns and 8200 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.00s
Presolved: 320 rows, 4120 columns, 8260 nonzeros
Variable types: 4080 continuous, 40 integer (40 binary)

Root relaxation: objective 4.013975e+04, 352 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 40139.7487    0    4          - 40139.7487     -      -    0s
H    0     0                    40186.519006 40139.7487  0.12%     -    0s
     0     0 40139.7487    0    4 40186.5190 40139.7487  0.12%     -    0s
     0     0 40139.7487    0    4 40186.5190 40139.7487  0.12%     -    0s
     0     0 40141.0492    0    4 40186.5190 40141.0492  0.11%     -    0s
     0     0 40147.6820    0    4 40186.5190 40147.6820  0.10%     -    0s
     0     0 40160.3474    0    2 40186.5190 40160.3474  0.07%     -    0s
     0     0 40171.2828    0    2 40186.5190 40171.2828  0.04%     -    0s
     0     0 40184.7873    0    2 40186.5190 40184.7873  0.00%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (634 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.018651900561e+04, best bound 4.018478729092e+04, gap 0.0043%