Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:51 2012

Optimize a model with 342 rows, 82 columns and 684 nonzeros
Presolve removed 105 rows and 0 columns
Presolve time: 0.00s
Presolved: 237 rows, 82 columns, 550 nonzeros
Variable types: 0 continuous, 82 integer (82 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.175000e+01, 146 iterations, 0.00 seconds

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

     0     0   31.75000    0   79   24.00000   31.75000  32.3%     -    0s
H    0     0                      26.0000000   31.75000  22.1%     -    0s
H    0     0                      28.0000000   31.75000  13.4%     -    0s
     0     0   30.83333    0   81   28.00000   30.83333  10.1%     -    0s
     0     0   30.54513    0   82   28.00000   30.54513  9.09%     -    0s
     0     0   30.32258    0   80   28.00000   30.32258  8.29%     -    0s
     0     0   30.16545    0   80   28.00000   30.16545  7.73%     -    0s
     0     0   30.13763    0   80   28.00000   30.13763  7.63%     -    0s
     0     0   30.09824    0   80   28.00000   30.09824  7.49%     -    0s
     0     0   30.03627    0   80   28.00000   30.03627  7.27%     -    0s
     0     0   29.96000    0   81   28.00000   29.96000  7.00%     -    0s
     0     0   29.95238    0   80   28.00000   29.95238  6.97%     -    0s
     0     0   29.93209    0   81   28.00000   29.93209  6.90%     -    0s
     0     0   29.93209    0   81   28.00000   29.93209  6.90%     -    0s
     0     2   29.93119    0   81   28.00000   29.93119  6.90%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 31

Explored 19 nodes (945 simplex iterations) in 0.07 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%