Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:36 2012

Optimize a model with 237 rows, 140 columns and 730 nonzeros
Presolve time: 0.00s
Presolved: 237 rows, 140 columns, 730 nonzeros
Variable types: 0 continuous, 140 integer (140 binary)
Found heuristic solution: objective 60.0000000

Root relaxation: objective 0.000000e+00, 43 iterations, 0.00 seconds

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

     0     0    0.00000    0   22   60.00000    0.00000   100%     -    0s
     0     0    0.81250    0   24   60.00000    0.81250  98.6%     -    0s
H    0     0                      54.0000000    0.81250  98.5%     -    0s
H    0     0                      52.0000000    0.81250  98.4%     -    0s
     0     0    1.06250    0   24   52.00000    1.06250  98.0%     -    0s
     0     0    1.12500    0   24   52.00000    1.12500  97.8%     -    0s
     0     0    1.12500    0   24   52.00000    1.12500  97.8%     -    0s
     0     0    1.12500    0   24   52.00000    1.12500  97.8%     -    0s
     0     0    1.12500    0   24   52.00000    1.12500  97.8%     -    0s
     0     2    1.12500    0   24   52.00000    1.12500  97.8%     -    0s
*  151    77              14      51.0000000   17.80000  65.1%  24.5    0s
*  206    86              14      49.0000000   18.00000  63.3%  22.6    0s
*  212    81              14      48.0000000   18.00000  62.5%  22.0    0s
*  288    99              13      47.0000000   23.50000  50.0%  22.3    0s
*  497   114              12      45.0000000   28.00000  37.8%  20.3    0s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 1211 nodes (23231 simplex iterations) in 0.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%