Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:19 2012

Optimize a model with 541 rows, 100 columns and 1082 nonzeros
Presolve removed 198 rows and 0 columns
Presolve time: 0.00s
Presolved: 343 rows, 100 columns, 860 nonzeros
Variable types: 0 continuous, 100 integer (100 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.480488e+01, 255 iterations, 0.01 seconds

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

     0     0   34.80488    0   95   28.00000   34.80488  24.3%     -    0s
H    0     0                      31.0000000   34.80488  12.3%     -    0s
     0     0   34.19231    0   93   31.00000   34.19231  10.3%     -    0s
     0     0   34.00717    0   97   31.00000   34.00717  9.70%     -    0s
     0     0   33.96490    0   99   31.00000   33.96490  9.56%     -    0s
H    0     0                      32.0000000   33.96490  6.14%     -    0s
     0     0   33.87595    0   97   32.00000   33.87595  5.86%     -    0s
     0     0   33.82144    0   97   32.00000   33.82144  5.69%     -    0s
     0     0   33.81480    0   99   32.00000   33.81480  5.67%     -    0s
     0     0   33.81480    0   97   32.00000   33.81480  5.67%     -    0s
     0     2   33.81346    0   97   32.00000   33.81346  5.67%     -    0s

Cutting planes:
  Clique: 3
  Zero half: 34

Explored 23 nodes (1219 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%