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

Optimize a model with 223 rows, 97 columns and 446 nonzeros
Presolve removed 58 rows and 14 columns
Presolve time: 0.00s
Presolved: 165 rows, 83 columns, 345 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 4.500000e+01, 101 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   62   40.00000   45.00000  12.5%     -    0s
     0     0   43.66667    0   70   40.00000   43.66667  9.17%     -    0s
H    0     0                      41.0000000   43.66667  6.50%     -    0s
     0     0   43.40000    0   77   41.00000   43.40000  5.85%     -    0s
H    0     0                      42.0000000   43.40000  3.33%     -    0s
     0     0   43.34375    0   78   42.00000   43.34375  3.20%     -    0s
     0     0   43.28571    0   80   42.00000   43.28571  3.06%     -    0s
     0     0   43.27778    0   79   42.00000   43.27778  3.04%     -    0s
     0     0   43.17647    0   80   42.00000   43.17647  2.80%     -    0s
     0     0   43.00000    0   76   42.00000   43.00000  2.38%     -    0s
     0     0   43.00000    0   75   42.00000   43.00000  2.38%     -    0s
     0     0     cutoff    0        42.00000   42.99996  2.38%     -    0s

Cutting planes:
  Zero half: 78

Explored 0 nodes (354 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%