Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:39 2013

Optimize a model with 451 rows, 16851 columns and 33661 nonzeros
Presolve time: 0.02s
Presolved: 451 rows, 16851 columns, 33661 nonzeros
Variable types: 16810 continuous, 41 integer (41 binary)

Root relaxation: objective 5.091581e+04, 1045 iterations, 0.02 seconds

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

     0     0 50915.8110    0    5          - 50915.8110     -      -    0s
H    0     0                    51374.000000 50915.8110  0.89%     -    0s
     0     0 51093.6445    0    3 51374.0000 51093.6445  0.55%     -    0s
H    0     0                    51151.000000 51093.6445  0.11%     -    0s
     0     0 51099.1299    0    2 51151.0000 51099.1299  0.10%     -    0s
     0     0 51099.4825    0    2 51151.0000 51099.4825  0.10%     -    0s
     0     0 51099.4825    0    2 51151.0000 51099.4825  0.10%     -    0s
     0     0 51121.5750    0    1 51151.0000 51121.5750  0.06%     -    0s
     0     2 51122.4795    0    1 51151.0000 51122.4795  0.06%     -    0s

Cutting planes:
  Implied bound: 38
  Flow cover: 2

Explored 3 nodes (1221 simplex iterations) in 0.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.115100000000e+04, best bound 5.115100000000e+04, gap 0.0%