Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:54:12 2013

Optimize a model with 341 rows, 9641 columns and 19251 nonzeros
Presolve time: 0.01s
Presolved: 341 rows, 9641 columns, 19251 nonzeros
Variable types: 9610 continuous, 31 integer (31 binary)

Root relaxation: objective 2.785743e+04, 319 iterations, 0.01 seconds

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

     0     0 27857.4261    0    5          - 27857.4261     -      -    0s
H    0     0                    28120.000000 27857.4261  0.93%     -    0s
     0     0 28114.5902    0    1 28120.0000 28114.5902  0.02%     -    0s
     0     0 28116.3567    0    2 28120.0000 28116.3567  0.01%     -    0s
     0     0 28116.3567    0    5 28120.0000 28116.3567  0.01%     -    0s
     0     0 28116.3567    0    1 28120.0000 28116.3567  0.01%     -    0s
     0     0 28116.3567    0    2 28120.0000 28116.3567  0.01%     -    0s
     0     0 28117.0814    0    2 28120.0000 28117.0814  0.01%     -    0s
     0     0 28118.2373    0    1 28120.0000 28118.2373  0.01%     -    0s

Cutting planes:
  Implied bound: 51
  Flow cover: 10

Explored 0 nodes (652 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.812000000000e+04, best bound 2.811823728814e+04, gap 0.0063%