Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:25 2013

Optimize a model with 1028 rows, 3044 columns and 8082 nonzeros
Presolve removed 958 rows and 2832 columns
Presolve time: 0.09s
Presolved: 70 rows, 212 columns, 424 nonzeros
Variable types: 148 continuous, 64 integer (64 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 4458.89976    0    2          - 4458.89976     -      -    0s
     0     0 4458.89985    0    2          - 4458.89985     -      -    0s
     0     0 4458.90960    0    2          - 4458.90960     -      -    0s
     0     0 4458.91943    0    2          - 4458.91943     -      -    0s
     0     0 4458.92924    0    2          - 4458.92924     -      -    0s
     0     0 4458.93903    0    2          - 4458.93903     -      -    0s
H    0     0                    4458.9448988 4458.93903  0.00%     -    0s

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

Explored 0 nodes (77 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.458944898842e+03, best bound 4.458939025995e+03, gap 0.0001%