Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:05 2012

Optimize a model with 215 rows, 89 columns and 430 nonzeros
Presolve removed 52 rows and 11 columns
Presolve time: 0.00s
Presolved: 163 rows, 78 columns, 337 nonzeros
Variable types: 0 continuous, 78 integer (78 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.100000e+01, 119 iterations, 0.00 seconds

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

     0     0   41.00000    0   59   36.00000   41.00000  13.9%     -    0s
H    0     0                      37.0000000   41.00000  10.8%     -    0s
H    0     0                      38.0000000   41.00000  7.89%     -    0s
     0     0   40.33333    0   76   38.00000   40.33333  6.14%     -    0s
     0     0   40.10000    0   78   38.00000   40.10000  5.53%     -    0s
     0     0   39.55556    0   78   38.00000   39.55556  4.09%     -    0s
     0     0   39.18182    0   74   38.00000   39.18182  3.11%     -    0s
     0     0     cutoff    0        38.00000   38.99996  2.63%     -    0s

Cutting planes:
  Zero half: 45

Explored 0 nodes (306 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0%