Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:13 2012

Optimize a model with 271 rows, 108 columns and 542 nonzeros
Presolve removed 81 rows and 18 columns
Presolve time: 0.00s
Presolved: 190 rows, 90 columns, 394 nonzeros
Variable types: 0 continuous, 90 integer (90 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 4.925000e+01, 137 iterations, 0.00 seconds

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

     0     0   49.25000    0   81   43.00000   49.25000  14.5%     -    0s
H    0     0                      44.0000000   49.25000  11.9%     -    0s
H    0     0                      45.0000000   49.25000  9.44%     -    0s
H    0     0                      46.0000000   49.25000  7.07%     -    0s
     0     0   48.33333    0   82   46.00000   48.33333  5.07%     -    0s
     0     0   48.14815    0   88   46.00000   48.14815  4.67%     -    0s
     0     0   47.50000    0   88   46.00000   47.50000  3.26%     -    0s
     0     0   47.24138    0   88   46.00000   47.24138  2.70%     -    0s
     0     0   47.16667    0   78   46.00000   47.16667  2.54%     -    0s
     0     0   47.10526    0   84   46.00000   47.10526  2.40%     -    0s
     0     0   47.05000    0   87   46.00000   47.05000  2.28%     -    0s
     0     0   47.00000    0   82   46.00000   47.00000  2.17%     -    0s
     0     0   47.00000    0   82   46.00000   47.00000  2.17%     -    0s
     0     0   47.00000    0   74   46.00000   47.00000  2.17%     -    0s
     0     2   47.00000    0   74   46.00000   47.00000  2.17%     -    0s

Cutting planes:
  Zero half: 21

Explored 1 nodes (424 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%