Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:19:22 2012

Optimize a model with 225 rows, 174 columns and 734 nonzeros
Presolve time: 0.00s
Presolved: 225 rows, 174 columns, 734 nonzeros
Variable types: 0 continuous, 174 integer (174 binary)
Found heuristic solution: objective 53.0000000

Root relaxation: objective 0.000000e+00, 99 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   61   53.00000    0.00000   100%     -    0s
H    0     0                      34.0000000    0.00000   100%     -    0s
     0     0    0.67064    0   62   34.00000    0.67064  98.0%     -    0s
     0     0    1.00000    0   63   34.00000    1.00000  97.1%     -    0s
     0     0    1.10833    0   64   34.00000    1.10833  96.7%     -    0s
     0     0    1.12092    0   64   34.00000    1.12092  96.7%     -    0s
H    0     0                      30.0000000    1.12092  96.3%     -    0s
     0     0    1.12092    0   64   30.00000    1.12092  96.3%     -    0s
     0     2    1.12092    0   64   30.00000    1.12092  96.3%     -    0s
*   29    28              18      23.0000000    2.47594  89.2%  27.1    0s
*   65    43              21      19.0000000    2.49241  86.9%  21.5    0s
*  632   176              29      18.0000000   10.00000  44.4%  22.0    0s

Explored 1076 nodes (22920 simplex iterations) in 0.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%