Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:54 2013

Optimize a model with 420 rows, 4260 columns and 8800 nonzeros
Presolve removed 40 rows and 40 columns
Presolve time: 0.01s
Presolved: 380 rows, 4220 columns, 8660 nonzeros
Variable types: 4140 continuous, 80 integer (80 binary)

Root relaxation: objective 3.709539e+04, 439 iterations, 0.01 seconds

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

     0     0 37095.3933    0    4          - 37095.3933     -      -    0s
     0     0 37118.3760    0    3          - 37118.3760     -      -    0s
     0     0 37118.3760    0    3          - 37118.3760     -      -    0s
     0     0 37122.0855    0    2          - 37122.0855     -      -    0s
     0     0 37122.0855    0    2          - 37122.0855     -      -    0s
     0     0 37122.0855    0    2          - 37122.0855     -      -    0s
     0     0 37122.0855    0    2          - 37122.0855     -      -    0s
H    0     0                    37252.786539 37122.0855  0.35%     -    0s
     0     2 37134.0257    0    1 37252.7865 37134.0257  0.32%     -    0s
*    4     0               3    37250.989291 37250.9893   0.0%  15.0    0s

Cutting planes:
  Flow cover: 8

Explored 5 nodes (649 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725098929094e+04, best bound 3.725098929094e+04, gap 0.0%