Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:07 2013

Optimize a model with 440 rows, 4760 columns and 10980 nonzeros
Presolve removed 20 rows and 260 columns
Presolve time: 0.01s
Presolved: 420 rows, 4500 columns, 10580 nonzeros
Variable types: 4420 continuous, 80 integer (80 binary)

Root relaxation: objective 3.894400e+04, 466 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    4          - 38944.0027     -      -    0s
     0     0 38988.2141    0    4          - 38988.2141     -      -    0s
     0     0 38988.2141    0    4          - 38988.2141     -      -    0s
     0     0 38991.3132    0    4          - 38991.3132     -      -    0s
     0     0 38994.4263    0    4          - 38994.4263     -      -    0s
     0     0 38994.4263    0    4          - 38994.4263     -      -    0s
H    0     0                    43197.948842 38994.4263  9.73%     -    0s
     0     2 38997.1596    0    4 43197.9488 38997.1596  9.72%     -    0s
*    6     4               6    39246.376355 39109.9677  0.35%  25.2    0s

Cutting planes:
  Flow cover: 5

Explored 9 nodes (842 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924637635461e+04, best bound 3.924637635461e+04, gap 0.0%