Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:48:05 2013

Optimize a model with 680 rows, 24260 columns and 248680 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.46s
Presolved: 660 rows, 24240 columns, 228660 nonzeros
Variable types: 24040 continuous, 200 integer (200 binary)

Root relaxation: objective 3.894400e+04, 458 iterations, 0.03 seconds

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

     0     0 38944.0027    0    6          - 38944.0027     -      -    0s
     0     0 38944.6301    0    6          - 38944.6301     -      -    0s
     0     0 38944.6946    0    8          - 38944.6946     -      -    1s
     0     0 38944.6946    0    8          - 38944.6946     -      -    1s
     0     0 38944.6946    0    8          - 38944.6946     -      -    1s
     0     2 38945.6157    0    8          - 38945.6157     -      -    4s
*   33    22              31    39372.534415 39029.3244  0.87%   9.7    4s
    36    20 39043.4275    1    7 39372.5344 39043.4275  0.84%   9.8    5s
H   63    21                    39249.560398 39044.7711  0.52%   8.3    5s
*   94    18              26    39247.715430 39225.1173  0.06%   7.8    5s
*  117    20              27    39247.244701 39225.1936  0.06%   6.8    5s

Cutting planes:
  Flow cover: 5

Explored 132 nodes (1476 simplex iterations) in 5.77 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924724470130e+04, best bound 3.924588890043e+04, gap 0.0035%