Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:57 2012

Optimize a model with 421 rows, 88 columns and 842 nonzeros
Presolve removed 147 rows and 0 columns
Presolve time: 0.00s
Presolved: 274 rows, 88 columns, 671 nonzeros
Variable types: 0 continuous, 88 integer (88 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.178947e+01, 191 iterations, 0.00 seconds

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

     0     0   31.78947    0   82   24.00000   31.78947  32.5%     -    0s
H    0     0                      26.0000000   31.78947  22.3%     -    0s
H    0     0                      27.0000000   31.78947  17.7%     -    0s
     0     0   31.10000    0   81   27.00000   31.10000  15.2%     -    0s
     0     0   30.76606    0   85   27.00000   30.76606  13.9%     -    0s
     0     0   30.67699    0   87   27.00000   30.67699  13.6%     -    0s
     0     0   30.59529    0   88   27.00000   30.59529  13.3%     -    0s
     0     0   30.51226    0   87   27.00000   30.51226  13.0%     -    0s
     0     0   30.50220    0   87   27.00000   30.50220  13.0%     -    0s
     0     0   30.50220    0   87   27.00000   30.50220  13.0%     -    0s
     0     2   30.50020    0   87   27.00000   30.50020  13.0%     -    0s

Cutting planes:
  Clique: 1
  Zero half: 46

Explored 80 nodes (2386 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%