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

Optimize a model with 253 rows, 96 columns and 506 nonzeros
Presolve removed 57 rows and 10 columns
Presolve time: 0.00s
Presolved: 196 rows, 86 columns, 411 nonzeros
Variable types: 0 continuous, 86 integer (86 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.350000e+01, 121 iterations, 0.00 seconds

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

     0     0   43.50000    0   69   36.00000   43.50000  20.8%     -    0s
H    0     0                      37.0000000   43.50000  17.6%     -    0s
     0     0   42.25000    0   82   37.00000   42.25000  14.2%     -    0s
H    0     0                      38.0000000   42.25000  11.2%     -    0s
     0     0   42.00000    0   81   38.00000   42.00000  10.5%     -    0s
     0     0   41.50000    0   82   38.00000   41.50000  9.21%     -    0s
H    0     0                      39.0000000   41.50000  6.41%     -    0s
     0     0   41.45714    0   79   39.00000   41.45714  6.30%     -    0s
     0     0   41.00000    0   79   39.00000   41.00000  5.13%     -    0s
     0     0   41.00000    0   85   39.00000   41.00000  5.13%     -    0s
     0     0   41.00000    0   53   39.00000   41.00000  5.13%     -    0s
H    0     0                      40.0000000   41.00000  2.50%     -    0s
     0     2   41.00000    0   53   40.00000   41.00000  2.50%     -    0s

Explored 3 nodes (626 simplex iterations) in 0.04 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%