Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:54 2013

Optimize a model with 1320 rows, 6060 columns and 15100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.08s
Presolved: 1300 rows, 6040 columns, 14080 nonzeros
Variable types: 5040 continuous, 1000 integer (1000 binary)

Root relaxation: objective 3.894400e+04, 468 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 39037.4487    0    6          - 39037.4487     -      -    0s
     0     0 39042.7919    0    4          - 39042.7919     -      -    0s
     0     0 39044.3882    0    4          - 39044.3882     -      -    0s
     0     0 39044.3882    0    4          - 39044.3882     -      -    0s
H    0     0                    39436.043415 39044.3882  0.99%     -    0s
     0     2 39044.3882    0    4 39436.0434 39044.3882  0.99%     -    0s
H   27     1                    39247.120171 39244.6598  0.01%  12.3    0s

Cutting planes:
  Gomory: 1
  Implied bound: 13
  Flow cover: 2

Explored 27 nodes (1085 simplex iterations) in 0.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924712017140e+04, best bound 3.924465977116e+04, gap 0.0063%