Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:27 2013

Optimize a model with 484 rows, 19404 columns and 38764 nonzeros
Presolve time: 0.03s
Presolved: 484 rows, 19404 columns, 38764 nonzeros
Variable types: 19360 continuous, 44 integer (44 binary)

Root relaxation: objective 3.846928e+04, 713 iterations, 0.01 seconds

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

     0     0 38469.2834    0    9          - 38469.2834     -      -    0s
H    0     0                    40946.000000 38469.2834  6.05%     -    0s
     0     0 38874.2049    0    7 40946.0000 38874.2049  5.06%     -    0s
H    0     0                    40788.453344 38874.2049  4.69%     -    0s
H    0     0                    40111.000000 38874.2049  3.08%     -    0s
     0     0 38901.8238    0    4 40111.0000 38901.8238  3.01%     -    0s
H    0     0                    40037.695238 38901.8238  2.84%     -    0s
H    0     0                    39549.000000 38901.8238  1.64%     -    0s
     0     0 38905.3327    0    5 39549.0000 38905.3327  1.63%     -    0s
H    0     0                    39537.000000 38905.3327  1.60%     -    0s
     0     0 38913.8540    0    5 39537.0000 38913.8540  1.58%     -    0s
     0     0 38914.3969    0    4 39537.0000 38914.3969  1.57%     -    0s
H    0     0                    39516.000000 38914.3969  1.52%     -    0s
H    0     0                    39160.000000 38914.3969  0.63%     -    0s
H    0     0                    39145.000000 38914.3969  0.59%     -    0s
     0     1 39070.3743    0    4 39145.0000 39070.3743  0.19%     -    0s
*    9     1               8    39143.000000 39117.2214  0.07%  19.6    0s

Cutting planes:
  Implied bound: 56
  Flow cover: 2

Explored 11 nodes (1137 simplex iterations) in 0.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.914300000000e+04, best bound 3.914300000000e+04, gap 0.0%