Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012

Optimize a model with 260 rows, 96 columns and 520 nonzeros
Presolve removed 43 rows and 5 columns
Presolve time: 0.00s
Presolved: 217 rows, 91 columns, 455 nonzeros
Variable types: 0 continuous, 91 integer (91 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.250000e+01, 137 iterations, 0.00 seconds

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

     0     0   42.50000    0   57   36.00000   42.50000  18.1%     -    0s
H    0     0                      38.0000000   42.50000  11.8%     -    0s
     0     0   42.00000    0   76   38.00000   42.00000  10.5%     -    0s
     0     0   41.40000    0   84   38.00000   41.40000  8.95%     -    0s
     0     0   41.00000    0   84   38.00000   41.00000  7.89%     -    0s
     0     0   40.85294    0   84   38.00000   40.85294  7.51%     -    0s
     0     0   40.70000    0   85   38.00000   40.70000  7.11%     -    0s
     0     0   40.58333    0   79   38.00000   40.58333  6.80%     -    0s
H    0     0                      39.0000000   40.58333  4.06%     -    0s
     0     0   40.00000    0   74   39.00000   40.00000  2.56%     -    0s
H    0     0                      40.0000000   40.00000   0.0%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 21

Explored 0 nodes (492 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%