Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:52:24 2012

Optimize a model with 283 rows, 189 columns and 894 nonzeros
Presolve time: 0.00s
Presolved: 283 rows, 189 columns, 894 nonzeros
Variable types: 0 continuous, 189 integer (189 binary)
Found heuristic solution: objective 71.0000000

Root relaxation: objective 0.000000e+00, 80 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   48   71.00000    0.00000   100%     -    0s
H    0     0                      51.0000000    0.00000   100%     -    0s
     0     0    0.69565    0   50   51.00000    0.69565  98.6%     -    0s
     0     0    0.86130    0   63   51.00000    0.86130  98.3%     -    0s
     0     0    0.95652    0   50   51.00000    0.95652  98.1%     -    0s
     0     0    0.95652    0   50   51.00000    0.95652  98.1%     -    0s
     0     0    0.95652    0   50   51.00000    0.95652  98.1%     -    0s
     0     2    0.96650    0   50   51.00000    0.96650  98.1%     -    0s
*   37    37              23      45.0000000    4.81522  89.3%  24.8    0s
*   75    58              20      44.0000000    4.86957  88.9%  20.7    0s
*  166   128              21      43.0000000    8.61836  80.0%  20.0    0s
*  217   136              21      39.0000000   11.92583  69.4%  19.9    0s
*  244   141              18      37.0000000   12.00000  67.6%  19.4    0s
*  567   205              16      35.0000000   17.00000  51.4%  18.6    0s
*  763   224              25      34.0000000   18.57692  45.4%  19.3    0s
* 1246   163              24      32.0000000   20.20000  36.9%  21.4    0s

Explored 1868 nodes (38658 simplex iterations) in 1.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%