Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:50 2013

Optimize a model with 400 rows, 4420 columns and 9340 nonzeros
Presolve removed 20 rows and 140 columns
Presolve time: 0.01s
Presolved: 380 rows, 4280 columns, 9140 nonzeros
Variable types: 4220 continuous, 60 integer (60 binary)

Root relaxation: objective 3.894400e+04, 416 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    2          - 38944.0027     -      -    0s
     0     0 39019.7945    0    2          - 39019.7945     -      -    0s
     0     0 39040.2820    0    2          - 39040.2820     -      -    0s
     0     0 39041.4707    0    2          - 39041.4707     -      -    0s
     0     0 39047.2443    0    2          - 39047.2443     -      -    0s
     0     0 39047.2443    0    2          - 39047.2443     -      -    0s
     0     0 39047.8315    0    2          - 39047.8315     -      -    0s
     0     0 39054.6759    0    2          - 39054.6759     -      -    0s
     0     0 39057.7153    0    2          - 39057.7153     -      -    0s
     0     0 39057.7153    0    2          - 39057.7153     -      -    0s
     0     0 39057.7153    0    2          - 39057.7153     -      -    0s
H    0     0                    43035.091056 39057.7153  9.24%     -    0s
     0     2 39057.7678    0    2 43035.0911 39057.7678  9.24%     -    0s
*    6     3               5    39243.200957 39243.2010   0.0%  36.8    0s

Cutting planes:
  Flow cover: 12

Explored 7 nodes (834 simplex iterations) in 0.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924320095727e+04, best bound 3.924320095727e+04, gap 0.0%