Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:44 2012

Optimize a model with 529 rows, 105 columns and 1058 nonzeros
Presolve removed 169 rows and 0 columns
Presolve time: 0.00s
Presolved: 360 rows, 105 columns, 860 nonzeros
Variable types: 0 continuous, 105 integer (105 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.802041e+01, 240 iterations, 0.00 seconds

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

     0     0   38.02041    0  100   28.00000   38.02041  35.8%     -    0s
     0     0   37.15070    0  100   28.00000   37.15070  32.7%     -    0s
     0     0   36.37273    0  100   28.00000   36.37273  29.9%     -    0s
H    0     0                      29.0000000   36.37273  25.4%     -    0s
     0     0   36.07388    0  102   29.00000   36.07388  24.4%     -    0s
     0     0   35.90225    0  101   29.00000   35.90225  23.8%     -    0s
     0     0   35.78829    0  102   29.00000   35.78829  23.4%     -    0s
     0     0   35.62497    0   98   29.00000   35.62497  22.8%     -    0s
     0     0   35.52463    0  100   29.00000   35.52463  22.5%     -    0s
     0     0   35.42061    0  100   29.00000   35.42061  22.1%     -    0s
     0     0   35.34604    0  101   29.00000   35.34604  21.9%     -    0s
H    0     0                      31.0000000   35.34604  14.0%     -    0s
     0     0   35.33021    0  101   31.00000   35.33021  14.0%     -    0s
     0     0   35.33021    0  100   31.00000   35.33021  14.0%     -    0s
     0     2   35.32822    0  100   31.00000   35.32822  14.0%     -    0s

Cutting planes:
  Clique: 1
  Zero half: 68

Explored 227 nodes (7324 simplex iterations) in 0.28 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%