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

Optimize a model with 253 rows, 100 columns and 506 nonzeros
Presolve removed 40 rows and 2 columns
Presolve time: 0.00s
Presolved: 213 rows, 98 columns, 445 nonzeros
Variable types: 0 continuous, 98 integer (98 binary)
Found heuristic solution: objective 37.0000000

Root relaxation: objective 4.500000e+01, 144 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   37.00000   45.00000  21.6%     -    0s
     0     0   43.72727    0   94   37.00000   43.72727  18.2%     -    0s
H    0     0                      38.0000000   43.72727  15.1%     -    0s
     0     0   43.37209    0   98   38.00000   43.37209  14.1%     -    0s
     0     0   43.00000    0   96   38.00000   43.00000  13.2%     -    0s
H    0     0                      39.0000000   43.00000  10.3%     -    0s
     0     0   42.88889    0   95   39.00000   42.88889  10.0%     -    0s
     0     0   42.51923    0   95   39.00000   42.51923  9.02%     -    0s
     0     0   42.24561    0   96   39.00000   42.24561  8.32%     -    0s
     0     0   42.07407    0   93   39.00000   42.07407  7.88%     -    0s
H    0     0                      40.0000000   42.07407  5.19%     -    0s
     0     0   42.00000    0   89   40.00000   42.00000  5.00%     -    0s
     0     0   41.95238    0   90   40.00000   41.95238  4.88%     -    0s
     0     0   41.94737    0   90   40.00000   41.94737  4.87%     -    0s
     0     0   41.94737    0   90   40.00000   41.94737  4.87%     -    0s
     0     2   41.94737    0   90   40.00000   41.94737  4.87%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 54

Explored 40 nodes (1228 simplex iterations) in 0.06 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%