Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:47 2013

Optimize a model with 432 rows, 846 columns and 2890 nonzeros
Presolve removed 80 rows and 140 columns
Presolve time: 0.04s
Presolved: 352 rows, 706 columns, 2097 nonzeros
Variable types: 364 continuous, 342 integer (342 binary)

Root relaxation: objective 4.814206e+03, 14 iterations, 0.00 seconds

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

     0     0 4814.20614    0    2          - 4814.20614     -      -    0s
     0     0 4815.09434    0    3          - 4815.09434     -      -    0s
     0     0 4820.03710    0    3          - 4820.03710     -      -    0s
     0     0 4821.85704    0    3          - 4821.85704     -      -    0s
     0     0 4822.56037    0    3          - 4822.56037     -      -    0s
     0     0 4822.86750    0    5          - 4822.86750     -      -    0s
     0     0 4823.02831    0    3          - 4823.02831     -      -    0s
     0     0 4823.14407    0    5          - 4823.14407     -      -    0s
     0     0 4823.26427    0    5          - 4823.26427     -      -    0s
H    0     0                    4839.5872117 4823.26427  0.34%     -    0s
     0     1 4823.31448    0    5 4839.58721 4823.31448  0.34%     -    0s
*  175     7             168    4831.3317165 4831.12035  0.00%   5.0    0s

Cutting planes:
  Gomory: 1
  Cover: 5
  Flow cover: 1

Explored 176 nodes (950 simplex iterations) in 0.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831331716518e+03, best bound 4.831120348046e+03, gap 0.0044%