Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:46 2013

Optimize a model with 720 rows, 4860 columns and 10900 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.03s
Presolved: 700 rows, 4840 columns, 10480 nonzeros
Variable types: 4440 continuous, 400 integer (400 binary)

Root relaxation: objective 3.839329e+04, 490 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 38466.6130    0    6          - 38466.6130     -      -    0s
     0     0 38489.1924    0    4          - 38489.1924     -      -    0s
     0     0 38489.1924    0    4          - 38489.1924     -      -    0s
     0     0 38489.1924    0    4          - 38489.1924     -      -    0s
     0     0 38489.1924    0    4          - 38489.1924     -      -    0s
H    0     0                    41751.217454 38489.1924  7.81%     -    0s
     0     2 38489.1924    0    4 41751.2175 38489.1924  7.81%     -    0s
*   24     6              12    38634.658974 38634.6590   0.0%  38.2    0s

Cutting planes:
  Gomory: 3
  Implied bound: 6
  Flow cover: 3

Explored 25 nodes (1731 simplex iterations) in 0.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863465897436e+04, best bound 3.863465897436e+04, gap 0.0%