Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:39 2013

Optimize a model with 828 rows, 844 columns and 3282 nonzeros
Presolve removed 777 rows and 779 columns
Presolve time: 0.01s
Presolved: 51 rows, 65 columns, 185 nonzeros
Variable types: 42 continuous, 23 integer (23 binary)

Root relaxation: objective 4.440467e+03, 29 iterations, 0.00 seconds

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

     0     0 4440.46714    0    1          - 4440.46714     -      -    0s
H    0     0                    4458.9448858 4440.46714  0.41%     -    0s
     0     0 4446.78799    0    1 4458.94489 4446.78799  0.27%     -    0s
     0     0     cutoff    0      4458.94489 4458.94489   0.0%     -    0s

Cutting planes:
  Implied bound: 1
  Flow cover: 3

Explored 0 nodes (42 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.458944885800e+03, best bound 4.458944885800e+03, gap 0.0%