Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:52 2013

Optimize a model with 9360 rows, 9060 columns and 36060 nonzeros
Presolve removed 30 rows and 0 columns
Presolve time: 0.04s
Presolved: 9330 rows, 9060 columns, 36030 nonzeros
Variable types: 9030 continuous, 30 integer (30 binary)

Root relaxation: objective 2.664870e+04, 1061 iterations, 0.07 seconds

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

     0     0 26648.6974    0   20          - 26648.6974     -      -    0s
H    0     0                    28199.000000 26648.6974  5.50%     -    0s
     0     0 27441.3518    0    4 28199.0000 27441.3518  2.69%     -    0s
H    0     0                    27828.000000 27441.3518  1.39%     -    0s
     0     0 27447.1226    0    1 27828.0000 27447.1226  1.37%     -    0s
H    0     0                    27741.210024 27447.1226  1.06%     -    0s
H    0     0                    27580.000000 27447.1226  0.48%     -    0s
H    0     0                    27558.000000 27447.1226  0.40%     -    0s
     0     2 27448.9688    0    1 27558.0000 27448.9688  0.40%     -    0s

Cutting planes:
  Gomory: 1
  Implied bound: 20

Explored 3 nodes (1461 simplex iterations) in 0.53 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%