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

Optimize a model with 276 rows, 100 columns and 552 nonzeros
Presolve removed 45 rows and 3 columns
Presolve time: 0.00s
Presolved: 231 rows, 97 columns, 487 nonzeros
Variable types: 0 continuous, 97 integer (97 binary)
Found heuristic solution: objective 36.0000000

Root relaxation: objective 4.450000e+01, 128 iterations, 0.00 seconds

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

     0     0   44.50000    0   75   36.00000   44.50000  23.6%     -    0s
H    0     0                      37.0000000   44.50000  20.3%     -    0s
     0     0   43.41667    0   90   37.00000   43.41667  17.3%     -    0s
H    0     0                      39.0000000   43.41667  11.3%     -    0s
     0     0   43.22222    0   90   39.00000   43.22222  10.8%     -    0s
     0     0   42.96396    0   93   39.00000   42.96396  10.2%     -    0s
     0     0   42.58201    0   91   39.00000   42.58201  9.18%     -    0s
     0     0   42.44828    0   92   39.00000   42.44828  8.84%     -    0s
     0     0   42.25510    0   94   39.00000   42.25510  8.35%     -    0s
     0     0   42.09524    0   96   39.00000   42.09524  7.94%     -    0s
H    0     0                      40.0000000   42.09524  5.24%     -    0s
     0     0   41.94595    0   95   40.00000   41.94595  4.86%     -    0s
     0     0   41.87500    0   94   40.00000   41.87500  4.69%     -    0s
     0     0   41.86842    0   94   40.00000   41.86842  4.67%     -    0s
     0     0   41.86842    0   87   40.00000   41.86842  4.67%     -    0s
H    0     0                      41.0000000   41.86842  2.12%     -    0s

Cutting planes:
  Zero half: 31

Explored 0 nodes (592 simplex iterations) in 0.05 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%