Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:09 2012

Optimize a model with 249 rows, 99 columns and 498 nonzeros
Presolve removed 55 rows and 10 columns
Presolve time: 0.00s
Presolved: 194 rows, 89 columns, 402 nonzeros
Variable types: 0 continuous, 89 integer (89 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 4.500000e+01, 140 iterations, 0.00 seconds

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

     0     0   45.00000    0   78   38.00000   45.00000  18.4%     -    0s
     0     0   44.00000    0   74   38.00000   44.00000  15.8%     -    0s
     0     0   43.83333    0   85   38.00000   43.83333  15.4%     -    0s
     0     0   43.18182    0   88   38.00000   43.18182  13.6%     -    0s
H    0     0                      39.0000000   43.18182  10.7%     -    0s
H    0     0                      40.0000000   43.18182  7.95%     -    0s
     0     0   42.78571    0   88   40.00000   42.78571  6.96%     -    0s
     0     0   42.64249    0   89   40.00000   42.64249  6.61%     -    0s
     0     0   42.62887    0   88   40.00000   42.62887  6.57%     -    0s
     0     0   42.62100    0   88   40.00000   42.62100  6.55%     -    0s
     0     0   42.62100    0   88   40.00000   42.62100  6.55%     -    0s
     0     2   42.61314    0   88   40.00000   42.61314  6.53%     -    0s
*   16     2               4      41.0000000   42.00000  2.44%  18.8    0s

Cutting planes:
  Gomory: 1
  Zero half: 40

Explored 21 nodes (786 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%