Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:14 2012

Optimize a model with 459 rows, 98 columns and 918 nonzeros
Presolve removed 156 rows and 0 columns
Presolve time: 0.00s
Presolved: 303 rows, 98 columns, 736 nonzeros
Variable types: 0 continuous, 98 integer (98 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.583333e+01, 195 iterations, 0.00 seconds

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

     0     0   35.83333    0   93   30.00000   35.83333  19.4%     -    0s
     0     0   35.00000    0   89   30.00000   35.00000  16.7%     -    0s
H    0     0                      31.0000000   35.00000  12.9%     -    0s
     0     0   35.00000    0   93   31.00000   35.00000  12.9%     -    0s
     0     0   35.00000    0   88   31.00000   35.00000  12.9%     -    0s
     0     2   35.00000    0   88   31.00000   35.00000  12.9%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 1
  Zero half: 13

Explored 124 nodes (3253 simplex iterations) in 0.12 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%