Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012

Optimize a model with 292 rows, 112 columns and 584 nonzeros
Presolve removed 51 rows and 9 columns
Presolve time: 0.00s
Presolved: 241 rows, 103 columns, 492 nonzeros
Variable types: 0 continuous, 103 integer (103 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.250000e+01, 143 iterations, 0.00 seconds

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

     0     0   52.50000    0   91   43.00000   52.50000  22.1%     -    0s
     0     0   50.57143    0   95   43.00000   50.57143  17.6%     -    0s
H    0     0                      46.0000000   50.57143  9.94%     -    0s
     0     0   50.25000    0  103   46.00000   50.25000  9.24%     -    0s
     0     0   49.23529    0  103   46.00000   49.23529  7.03%     -    0s
     0     0   48.74312    0  103   46.00000   48.74312  5.96%     -    0s
     0     0   48.29762    0   99   46.00000   48.29762  4.99%     -    0s
     0     0   48.23423    0   97   46.00000   48.23423  4.86%     -    0s
     0     0   48.16667    0   98   46.00000   48.16667  4.71%     -    0s
     0     0   48.02747    0  103   46.00000   48.02747  4.41%     -    0s
     0     0   47.87629    0  103   46.00000   47.87629  4.08%     -    0s
     0     0   47.86331    0  103   46.00000   47.86331  4.05%     -    0s
     0     0   47.86331    0   99   46.00000   47.86331  4.05%     -    0s
     0     2   47.86331    0   99   46.00000   47.86331  4.05%     -    0s

Cutting planes:
  Zero half: 52

Explored 31 nodes (1230 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%