Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:34 2012

Optimize a model with 536 rows, 104 columns and 1072 nonzeros
Presolve removed 200 rows and 0 columns
Presolve time: 0.00s
Presolved: 336 rows, 104 columns, 834 nonzeros
Variable types: 0 continuous, 104 integer (104 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.701132e+01, 203 iterations, 0.00 seconds

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

     0     0   37.01132    0  102   27.00000   37.01132  37.1%     -    0s
     0     0   36.48003    0  103   27.00000   36.48003  35.1%     -    0s
     0     0   36.33438    0  101   27.00000   36.33438  34.6%     -    0s
     0     0   36.08907    0  102   27.00000   36.08907  33.7%     -    0s
     0     0   35.85675    0  102   27.00000   35.85675  32.8%     -    0s
H    0     0                      28.0000000   35.85675  28.1%     -    0s
     0     0   35.59483    0  104   28.00000   35.59483  27.1%     -    0s
     0     0   35.45663    0  103   28.00000   35.45663  26.6%     -    0s
     0     0   35.43397    0  103   28.00000   35.43397  26.5%     -    0s
     0     0   35.37241    0  103   28.00000   35.37241  26.3%     -    0s
     0     0   35.35005    0  104   28.00000   35.35005  26.3%     -    0s
     0     0   35.33829    0  104   28.00000   35.33829  26.2%     -    0s
     0     0   35.33829    0  104   28.00000   35.33829  26.2%     -    0s
     0     2   35.32824    0  104   28.00000   35.32824  26.2%     -    0s
H    6     6                      31.0000000   35.31000  13.9%  60.0    0s

Cutting planes:
  Clique: 2
  Zero half: 41

Explored 174 nodes (6270 simplex iterations) in 0.27 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%