Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:43 2013

Optimize a model with 9330 rows, 9030 columns and 36030 nonzeros
Presolve removed 1519 rows and 0 columns
Presolve time: 0.05s
Presolved: 7811 rows, 9030 columns, 32992 nonzeros
Variable types: 9000 continuous, 30 integer (30 binary)

Root relaxation: objective 2.744685e+04, 733 iterations, 0.03 seconds

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

     0     0 27446.8533    0    1          - 27446.8533     -      -    0s
H    0     0                    27558.000000 27446.8533  0.40%     -    0s
     0     0 27446.9362    0    2 27558.0000 27446.9362  0.40%     -    0s
     0     0 27446.9362    0    2 27558.0000 27446.9362  0.40%     -    0s
     0     0 27449.7817    0    2 27558.0000 27449.7817  0.39%     -    0s
     0     0 27449.7817    0    1 27558.0000 27449.7817  0.39%     -    0s
     0     0 27449.7817    0    2 27558.0000 27449.7817  0.39%     -    0s
     0     0 27458.3642    0    2 27558.0000 27458.3642  0.36%     -    0s
     0     0 27459.7208    0    3 27558.0000 27459.7208  0.36%     -    0s
     0     0 27459.7208    0    3 27558.0000 27459.7208  0.36%     -    0s
     0     0 27461.1369    0    3 27558.0000 27461.1369  0.35%     -    0s
     0     2 27470.0000    0    3 27558.0000 27470.0000  0.32%     -    0s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 3 nodes (1415 simplex iterations) in 0.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.755800000000e+04, best bound 2.755800000000e+04, gap 0.0%