Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:40 2013

Optimize a model with 428 rows, 1244 columns and 3282 nonzeros
Presolve removed 397 rows and 1149 columns
Presolve time: 0.02s
Presolved: 31 rows, 95 columns, 190 nonzeros
Variable types: 70 continuous, 25 integer (25 binary)

Root relaxation: objective 4.440467e+03, 5 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
     0     0 4446.78799    0    1          - 4446.78799     -      -    0s
     0     0 4458.91950    0    2          - 4458.91950     -      -    0s
     0     0 4458.91962    0    2          - 4458.91962     -      -    0s
     0     0 4458.94391    0    2          - 4458.94391     -      -    0s
H    0     0                    4458.9448858 4458.94391  0.00%     -    0s

Cutting planes:
  Cover: 2
  Implied bound: 1
  Flow cover: 2

Explored 0 nodes (34 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.458944885801e+03, best bound 4.458943914628e+03, gap 0.0000%