Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:13 2013

Optimize a model with 2280 rows, 6040 columns and 16020 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.09s
Presolved: 2220 rows, 6000 columns, 13960 nonzeros
Variable types: 5020 continuous, 980 integer (980 binary)

Root relaxation: objective 3.894400e+04, 1170 iterations, 0.02 seconds

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

     0     0 38944.0027    0    2          - 38944.0027     -      -    0s
     0     0 39057.5450    0    2          - 39057.5450     -      -    0s
     0     0 39060.9844    0    2          - 39060.9844     -      -    0s
     0     0 39070.4027    0    2          - 39070.4027     -      -    0s
     0     0 39080.7359    0    2          - 39080.7359     -      -    0s
     0     0 39083.3384    0    2          - 39083.3384     -      -    0s
     0     0 39083.3384    0    2          - 39083.3384     -      -    0s
H    0     0                    43651.176430 39083.3384  10.5%     -    0s
     0     2 39084.3596    0    2 43651.1764 39084.3596  10.5%     -    0s
H   20    14                    39252.195182 39107.1427  0.37%  21.9    0s
H   21    13                    39249.931166 39107.1427  0.36%  21.5    0s
H   22    11                    39248.765342 39107.1427  0.36%  23.0    0s
*   23    10              21    39247.710632 39107.1427  0.36%  24.4    0s
H  117     1                    39247.571006 39241.1318  0.02%   8.8    0s

Cutting planes:
  Gomory: 1
  Flow cover: 12

Explored 118 nodes (2333 simplex iterations) in 0.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924757100628e+04, best bound 3.924608683136e+04, gap 0.0038%