Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:30 2013

Optimize a model with 1280 rows, 7040 columns and 16020 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.08s
Presolved: 1240 rows, 6980 columns, 13960 nonzeros
Variable types: 6000 continuous, 980 integer (980 binary)

Root relaxation: objective 3.860476e+04, 597 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    3          - 38604.7615     -      -    0s
     0     0 38634.0856    0    6          - 38634.0856     -      -    0s
     0     0 38637.2588    0    6          - 38637.2588     -      -    0s
     0     0 38638.8504    0    6          - 38638.8504     -      -    0s
     0     0 38638.8504    0    6          - 38638.8504     -      -    0s
     0     0 38638.8905    0    6          - 38638.8905     -      -    0s
     0     0 38638.8905    0    6          - 38638.8905     -      -    0s
H    0     0                    43933.637491 38638.8905  12.1%     -    0s
     0     2 38641.6974    0    6 43933.6375 38641.6974  12.0%     -    0s
*   65    64              55    39584.808768 38756.1123  2.09%   7.4    0s
*   81    21              15    38862.894219 38761.2798  0.26%   7.1    0s
*  106    21              14    38861.053897 38773.3694  0.23%   7.2    0s
*  180     5               8    38861.052123 38853.9966  0.02%   9.5    0s

Cutting planes:
  Gomory: 3
  Flow cover: 11

Explored 186 nodes (2805 simplex iterations) in 0.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886105212265e+04, best bound 3.885953640346e+04, gap 0.0039%