Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:55 2012

Optimize a model with 386 rows, 87 columns and 772 nonzeros
Presolve removed 128 rows and 0 columns
Presolve time: 0.00s
Presolved: 258 rows, 87 columns, 616 nonzeros
Variable types: 0 continuous, 87 integer (87 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.255556e+01, 173 iterations, 0.00 seconds

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

     0     0   32.55556    0   79   24.00000   32.55556  35.6%     -    0s
H    0     0                      27.0000000   32.55556  20.6%     -    0s
     0     0   31.83333    0   80   27.00000   31.83333  17.9%     -    0s
H    0     0                      28.0000000   31.83333  13.7%     -    0s
     0     0   31.56132    0   84   28.00000   31.56132  12.7%     -    0s
     0     0   31.16908    0   84   28.00000   31.16908  11.3%     -    0s
     0     0   31.02703    0   82   28.00000   31.02703  10.8%     -    0s
     0     0   30.87719    0   85   28.00000   30.87719  10.3%     -    0s
     0     0   30.71557    0   85   28.00000   30.71557  9.70%     -    0s
     0     0   30.62471    0   85   28.00000   30.62471  9.37%     -    0s
     0     0   30.60434    0   86   28.00000   30.60434  9.30%     -    0s
     0     0   30.60434    0   85   28.00000   30.60434  9.30%     -    0s
     0     2   30.58632    0   85   28.00000   30.58632  9.24%     -    0s

Cutting planes:
  Clique: 1
  Zero half: 44

Explored 39 nodes (1579 simplex iterations) in 0.09 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%