Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:25 2013

Optimize a model with 2320 rows, 8060 columns and 22100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.15s
Presolved: 2300 rows, 8040 columns, 20080 nonzeros
Variable types: 6040 continuous, 2000 integer (2000 binary)

Root relaxation: objective 3.860476e+04, 516 iterations, 0.01 seconds

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

     0     0 38604.7615    0    6          - 38604.7615     -      -    0s
     0     0 38740.4253    0    8          - 38740.4253     -      -    0s
     0     0 38745.2839    0    6          - 38745.2839     -      -    0s
     0     0 38750.9717    0    6          - 38750.9717     -      -    0s
     0     0 38752.9472    0    6          - 38752.9472     -      -    0s
     0     0 38753.6023    0    6          - 38753.6023     -      -    0s
     0     0 38754.2688    0    7          - 38754.2688     -      -    0s
     0     0 38758.1208    0    7          - 38758.1208     -      -    0s
     0     0 38758.4019    0    7          - 38758.4019     -      -    0s
     0     0 38758.4330    0    7          - 38758.4330     -      -    0s
     0     0 38758.4330    0    7          - 38758.4330     -      -    0s
H    0     0                    38867.667704 38758.4330  0.28%     -    0s
     0     2 38762.9239    0    6 38867.6677 38762.9239  0.27%     -    0s
*  126     2              13    38861.063445 38861.0473  0.00%   6.9    1s

Cutting planes:
  Gomory: 3
  Implied bound: 51
  Flow cover: 4

Explored 127 nodes (1737 simplex iterations) in 1.35 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886106344529e+04, best bound 3.886104732248e+04, gap 0.0000%