Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:16 2012

Optimize a model with 486 rows, 99 columns and 972 nonzeros
Presolve removed 173 rows and 0 columns
Presolve time: 0.00s
Presolved: 313 rows, 99 columns, 756 nonzeros
Variable types: 0 continuous, 99 integer (99 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.591954e+01, 173 iterations, 0.00 seconds

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

     0     0   35.91954    0   90   28.00000   35.91954  28.3%     -    0s
     0     0   35.44817    0   92   28.00000   35.44817  26.6%     -    0s
H    0     0                      29.0000000   35.44817  22.2%     -    0s
     0     0   35.00000    0   92   29.00000   35.00000  20.7%     -    0s
     0     0   35.00000    0   89   29.00000   35.00000  20.7%     -    0s
     0     0   34.97160    0   97   29.00000   34.97160  20.6%     -    0s
     0     0   34.83810    0   98   29.00000   34.83810  20.1%     -    0s
     0     0   34.71605    0   97   29.00000   34.71605  19.7%     -    0s
     0     0   34.70862    0   98   29.00000   34.70862  19.7%     -    0s
     0     0   34.70862    0   98   29.00000   34.70862  19.7%     -    0s
     0     2   34.70469    0   98   29.00000   34.70469  19.7%     -    0s
H   55    19                      30.0000000   34.42029  14.7%  23.2    0s
H  136    16                      31.0000000   33.65812  8.57%  22.9    0s

Cutting planes:
  Clique: 2
  Zero half: 57

Explored 204 nodes (5369 simplex iterations) in 0.21 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%