Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:48 2012

Optimize a model with 283 rows, 79 columns and 566 nonzeros
Presolve removed 61 rows and 0 columns
Presolve time: 0.00s
Presolved: 222 rows, 79 columns, 485 nonzeros
Variable types: 0 continuous, 79 integer (79 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.225000e+01, 130 iterations, 0.00 seconds

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

     0     0   32.25000    0   69   24.00000   32.25000  34.4%     -    0s
H    0     0                      25.0000000   32.25000  29.0%     -    0s
H    0     0                      26.0000000   32.25000  24.0%     -    0s
     0     0   31.09804    0   76   26.00000   31.09804  19.6%     -    0s
H    0     0                      27.0000000   31.09804  15.2%     -    0s
     0     0   30.75000    0   74   27.00000   30.75000  13.9%     -    0s
     0     0   30.51000    0   78   27.00000   30.51000  13.0%     -    0s
     0     0   30.40000    0   78   27.00000   30.40000  12.6%     -    0s
     0     0   30.27673    0   77   27.00000   30.27673  12.1%     -    0s
     0     0   30.24395    0   79   27.00000   30.24395  12.0%     -    0s
     0     0   30.14286    0   79   27.00000   30.14286  11.6%     -    0s
     0     0   30.09355    0   79   27.00000   30.09355  11.5%     -    0s
     0     0   30.07827    0   79   27.00000   30.07827  11.4%     -    0s
     0     0   30.07827    0   79   27.00000   30.07827  11.4%     -    0s
     0     2   30.07617    0   79   27.00000   30.07617  11.4%     -    0s
*   25     3               4      28.0000000   29.79601  6.41%  17.1    0s

Cutting planes:
  Gomory: 2
  Zero half: 44

Explored 37 nodes (1135 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%