Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:46 2013

Optimize a model with 380 rows, 4340 columns and 8820 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.02s
Presolved: 340 rows, 4280 columns, 8560 nonzeros
Variable types: 4200 continuous, 80 integer (80 binary)

Root relaxation: objective 3.894400e+04, 456 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 39040.8292    0    2          - 39040.8292     -      -    0s
     0     0 39047.6217    0    2          - 39047.6217     -      -    0s
     0     0 39047.6217    0    2          - 39047.6217     -      -    0s
     0     0 39048.1578    0    2          - 39048.1578     -      -    0s
     0     0 39055.1035    0    2          - 39055.1035     -      -    0s
     0     0 39058.1178    0    2          - 39058.1178     -      -    0s
     0     0 39058.1178    0    2          - 39058.1178     -      -    0s
     0     0 39058.1178    0    2          - 39058.1178     -      -    0s
H    0     0                    39243.200957 39058.1178  0.47%     -    0s
     0     2 39160.3140    0    1 39243.2010 39160.3140  0.21%     -    0s

Cutting planes:
  Flow cover: 12

Explored 4 nodes (624 simplex iterations) in 0.15 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%