Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:17 2012

Optimize a model with 296 rows, 113 columns and 592 nonzeros
Presolve removed 45 rows and 4 columns
Presolve time: 0.00s
Presolved: 251 rows, 109 columns, 522 nonzeros
Variable types: 0 continuous, 109 integer (109 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.200000e+01, 139 iterations, 0.00 seconds

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

     0     0   52.00000    0   92   43.00000   52.00000  20.9%     -    0s
     0     0   50.62500    0  103   43.00000   50.62500  17.7%     -    0s
H    0     0                      45.0000000   50.62500  12.5%     -    0s
     0     0   49.50000    0   87   45.00000   49.50000  10.0%     -    0s
     0     0   49.09091    0  101   45.00000   49.09091  9.09%     -    0s
     0     0   48.66667    0   92   45.00000   48.66667  8.15%     -    0s
     0     0   48.46667    0  106   45.00000   48.46667  7.70%     -    0s
     0     0   48.33236    0  108   45.00000   48.33236  7.41%     -    0s
     0     0   48.27973    0  108   45.00000   48.27973  7.29%     -    0s
     0     0   48.22206    0  108   45.00000   48.22206  7.16%     -    0s
     0     0   48.22158    0  108   45.00000   48.22158  7.16%     -    0s
     0     0   48.22158    0  106   45.00000   48.22158  7.16%     -    0s
H    0     0                      46.0000000   48.22158  4.83%     -    0s
     0     2   48.22101    0  106   46.00000   48.22101  4.83%     -    0s

Cutting planes:
  Zero half: 56

Explored 25 nodes (1080 simplex iterations) in 0.06 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%