Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:45 2013

Optimize a model with 1320 rows, 6060 columns and 15100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.15s
Presolved: 1300 rows, 6040 columns, 14080 nonzeros
Variable types: 5040 continuous, 1000 integer (1000 binary)

Root relaxation: objective 3.839329e+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 38393.2919    0    4          - 38393.2919     -      -    0s
     0     0 38492.5801    0    4          - 38492.5801     -      -    0s
     0     0 38503.4056    0    4          - 38503.4056     -      -    0s
     0     0 38503.5395    0    4          - 38503.5395     -      -    0s
     0     0 38503.5395    0    4          - 38503.5395     -      -    0s
H    0     0                    38679.521325 38503.5395  0.45%     -    0s
     0     2 38503.5395    0    4 38679.5213 38503.5395  0.45%     -    0s
*   37     6              31    38634.712282 38632.4655  0.01%  13.8    0s

Cutting planes:
  Gomory: 3
  Implied bound: 8
  Flow cover: 2

Explored 38 nodes (1259 simplex iterations) in 0.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863471228242e+04, best bound 3.863246547246e+04, gap 0.0058%