Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:30 2012

Optimize a model with 643 rows, 116 columns and 1286 nonzeros
Presolve removed 235 rows and 0 columns
Presolve time: 0.00s
Presolved: 408 rows, 116 columns, 1039 nonzeros
Variable types: 0 continuous, 116 integer (116 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.981731e+01, 282 iterations, 0.01 seconds

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

     0     0   39.81731    0  115   28.00000   39.81731  42.2%     -    0s
H    0     0                      29.0000000   39.81731  37.3%     -    0s
     0     0   38.96154    0  113   29.00000   38.96154  34.4%     -    0s
     0     0   38.51992    0  108   29.00000   38.51992  32.8%     -    0s
H    0     0                      30.0000000   38.51992  28.4%     -    0s
     0     0   38.30608    0  113   30.00000   38.30608  27.7%     -    0s
H    0     0                      31.0000000   38.30608  23.6%     -    0s
     0     0   38.29949    0  113   31.00000   38.29949  23.5%     -    0s
     0     0   38.24895    0  115   31.00000   38.24895  23.4%     -    0s
     0     0   38.21714    0  114   31.00000   38.21714  23.3%     -    0s
     0     0   38.19933    0  113   31.00000   38.19933  23.2%     -    0s
     0     0   38.19707    0  113   31.00000   38.19707  23.2%     -    0s
     0     0   38.19707    0  113   31.00000   38.19707  23.2%     -    0s
     0     2   38.19670    0  113   31.00000   38.19670  23.2%     -    0s
*    7     7               6      32.0000000   38.19670  19.4%  49.6    0s
*   19     6               9      33.0000000   38.19670  15.7%  23.8    0s

Cutting planes:
  Clique: 2
  Zero half: 49

Explored 467 nodes (13793 simplex iterations) in 0.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%