Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:01 2012

Optimize a model with 432 rows, 92 columns and 864 nonzeros
Presolve removed 153 rows and 0 columns
Presolve time: 0.00s
Presolved: 279 rows, 92 columns, 686 nonzeros
Variable types: 0 continuous, 92 integer (92 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.431579e+01, 189 iterations, 0.00 seconds

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

     0     0   34.31579    0   87   28.00000   34.31579  22.6%     -    0s
H    0     0                      29.0000000   34.31579  18.3%     -    0s
     0     0   33.94624    0   89   29.00000   33.94624  17.1%     -    0s
H    0     0                      30.0000000   33.94624  13.2%     -    0s
     0     0   33.58511    0   90   30.00000   33.58511  12.0%     -    0s
     0     0   33.31020    0   88   30.00000   33.31020  11.0%     -    0s
     0     0   33.14453    0   90   30.00000   33.14453  10.5%     -    0s
     0     0   33.03846    0   89   30.00000   33.03846  10.1%     -    0s
     0     0   32.93103    0   86   30.00000   32.93103  9.77%     -    0s
     0     0   32.90792    0   88   30.00000   32.90792  9.69%     -    0s
     0     0   32.90043    0   90   30.00000   32.90043  9.67%     -    0s
     0     0   32.90043    0   90   30.00000   32.90043  9.67%     -    0s
H    0     0                      31.0000000   32.90043  6.13%     -    0s
     0     2   32.90043    0   90   31.00000   32.90043  6.13%     -    0s

Cutting planes:
  Clique: 3
  Zero half: 30

Explored 14 nodes (1081 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%