Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:22:52 2013

Optimize a model with 616 rows, 31416 columns and 62776 nonzeros
Presolve time: 0.04s
Presolved: 616 rows, 31416 columns, 62776 nonzeros
Variable types: 31360 continuous, 56 integer (56 binary)

Root relaxation: objective 5.357519e+04, 1208 iterations, 0.03 seconds

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

     0     0 53575.1926    0    8          - 53575.1926     -      -    0s
H    0     0                    55041.000000 53575.1926  2.66%     -    0s
H    0     0                    54155.000000 53575.1926  1.07%     -    0s
     0     0 53975.7697    0    4 54155.0000 53975.7697  0.33%     -    0s
     0     0 53978.1878    0    4 54155.0000 53978.1878  0.33%     -    0s
     0     0 53978.1878    0    8 54155.0000 53978.1878  0.33%     -    0s
     0     0 53978.1878    0    4 54155.0000 53978.1878  0.33%     -    0s
     0     0 53978.1878    0    5 54155.0000 53978.1878  0.33%     -    0s
     0     0 53981.4003    0    4 54155.0000 53981.4003  0.32%     -    0s
     0     0 53981.4003    0    4 54155.0000 53981.4003  0.32%     -    0s
     0     0 53981.4003    0    4 54155.0000 53981.4003  0.32%     -    0s
     0     0 53981.4765    0    3 54155.0000 53981.4765  0.32%     -    0s
     0     0 53981.4765    0    3 54155.0000 53981.4765  0.32%     -    0s
     0     2 53981.9338    0    3 54155.0000 53981.9338  0.32%     -    0s
*   11     4              11    54059.000000 54034.1289  0.05%  19.7    0s

Cutting planes:
  Implied bound: 53
  Flow cover: 4

Explored 18 nodes (3147 simplex iterations) in 0.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.405900000000e+04, best bound 5.405900000000e+04, gap 0.0%