Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:33:05 2013

Optimize a model with 2750 rows, 625250 columns and 1250250 nonzeros
Presolve time: 2.13s
Presolved: 2750 rows, 625250 columns, 1250250 nonzeros
Variable types: 625000 continuous, 250 integer (250 binary)

Root relaxation: objective 5.059260e+05, 17495 iterations, 3.30 seconds

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

     0     0 505925.959    0    6          - 505925.959     -      -    6s
H    0     0                    528299.00000 505925.959  4.23%     -    8s
H    0     0                    519429.00000 505925.959  2.60%     -   10s
     0     0 506657.346    0    4 519429.000 506657.346  2.46%     -   13s
     0     0 506657.346    0    6 519429.000 506657.346  2.46%     -   19s
     0     0 506658.035    0    4 519429.000 506658.035  2.46%     -   25s
     0     0 506679.917    0    4 519429.000 506679.917  2.45%     -   26s
     0     0 506693.533    0    5 519429.000 506693.533  2.45%     -   28s
     0     0 506695.661    0    4 519429.000 506695.661  2.45%     -   29s
     0     0 506697.565    0    4 519429.000 506697.565  2.45%     -   30s
     0     0 506698.109    0    4 519429.000 506698.109  2.45%     -   31s
     0     0 506698.109    0    4 519429.000 506698.109  2.45%     -   32s
H    0     0                    507246.00000 506698.109  0.11%     -   36s
     0     2 506699.913    0    4 507246.000 506699.913  0.11%     -   37s
*    7     4               7    507175.00000 506809.572  0.07%  93.7   39s
     9     5 507169.726    4    1 507175.000 506834.371  0.07%   130   40s

Cutting planes:
  Implied bound: 156
  Flow cover: 5

Explored 15 nodes (37765 simplex iterations) in 41.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.071750000000e+05, best bound 5.071750000000e+05, gap 0.0%