Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:58:53 2013

Optimize a model with 440 rows, 16040 columns and 32040 nonzeros
Presolve time: 0.02s
Presolved: 440 rows, 16040 columns, 32040 nonzeros
Variable types: 16000 continuous, 40 integer (40 binary)

Root relaxation: objective 4.238516e+04, 538 iterations, 0.01 seconds

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

     0     0 42385.1570    0    8          - 42385.1570     -      -    0s
H    0     0                    44532.000000 42385.1570  4.82%     -    0s
H    0     0                    42887.000000 42385.1570  1.17%     -    0s
     0     0 42807.2932    0    3 42887.0000 42807.2932  0.19%     -    0s
     0     0 42819.3162    0    2 42887.0000 42819.3162  0.16%     -    0s
     0     0 42819.7597    0    2 42887.0000 42819.7597  0.16%     -    0s
     0     0 42820.3704    0    2 42887.0000 42820.3704  0.16%     -    0s
     0     0 42823.0565    0    2 42887.0000 42823.0565  0.15%     -    0s
     0     0 42823.8098    0    3 42887.0000 42823.8098  0.15%     -    0s
     0     0 42824.3824    0    3 42887.0000 42824.3824  0.15%     -    0s
     0     0 42824.4353    0    2 42887.0000 42824.4353  0.15%     -    0s
     0     0 42824.4353    0    2 42887.0000 42824.4353  0.15%     -    0s
*    0     0               0    42860.000000 42860.0000   0.0%     -    0s

Cutting planes:
  Implied bound: 44
  Flow cover: 5

Explored 0 nodes (731 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.286000000000e+04, best bound 4.286000000000e+04, gap 0.0%