Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:17 2013

Optimize a model with 440 rows, 4340 columns and 9520 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 420 rows, 4320 columns, 9300 nonzeros
Variable types: 4240 continuous, 80 integer (80 binary)

Root relaxation: objective 3.894400e+04, 502 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    6          - 38944.0027     -      -    0s
     0     0 38988.2141    0    6          - 38988.2141     -      -    0s
     0     0 38988.2141    0    6          - 38988.2141     -      -    0s
     0     0 38991.6711    0    6          - 38991.6711     -      -    0s
     0     0 38994.4263    0    6          - 38994.4263     -      -    0s
     0     0 38994.4263    0    6          - 38994.4263     -      -    0s
H    0     0                    44558.301938 38994.4263  12.5%     -    0s
     0     2 38997.3047    0    6 44558.3019 38997.3047  12.5%     -    0s
*    7     4               7    39246.376355 39164.0958  0.21%  20.1    0s

Cutting planes:
  Flow cover: 5

Explored 16 nodes (962 simplex iterations) in 0.18 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%