Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:12:33 2013

Optimize a model with 561 rows, 26061 columns and 52071 nonzeros
Presolve time: 0.04s
Presolved: 561 rows, 26061 columns, 52071 nonzeros
Variable types: 26010 continuous, 51 integer (51 binary)

Root relaxation: objective 6.862848e+04, 1367 iterations, 0.03 seconds

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

     0     0 68628.4770    0    6          - 68628.4770     -      -    0s
H    0     0                    69803.000000 68628.4770  1.68%     -    0s
     0     0 68805.2684    0    3 69803.0000 68805.2684  1.43%     -    0s
     0     0 68805.4511    0    3 69803.0000 68805.4511  1.43%     -    0s
     0     0 68811.1485    0    2 69803.0000 68811.1485  1.42%     -    0s
     0     0 68811.1485    0    2 69803.0000 68811.1485  1.42%     -    0s
     0     0 68811.1485    0    2 69803.0000 68811.1485  1.42%     -    0s
     0     0 68811.1485    0    2 69803.0000 68811.1485  1.42%     -    0s
     0     0 68811.1485    0    2 69803.0000 68811.1485  1.42%     -    0s
H    0     0                    68818.000000 68811.1485  0.01%     -    0s

Cutting planes:
  Implied bound: 27
  Flow cover: 2

Explored 0 nodes (1451 simplex iterations) in 0.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.881800000000e+04, best bound 6.881114849624e+04, gap 0.0100%