Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:55:33 2012

Optimize a model with 257 rows, 151 columns and 791 nonzeros
Presolve time: 0.00s
Presolved: 257 rows, 151 columns, 791 nonzeros
Variable types: 0 continuous, 151 integer (151 binary)
Found heuristic solution: objective 65.0000000

Root relaxation: objective 0.000000e+00, 50 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   23   65.00000    0.00000   100%     -    0s
H    0     0                      57.0000000    0.00000   100%     -    0s
     0     0    0.73518    0   25   57.00000    0.73518  98.7%     -    0s
     0     0    0.75889    0   25   57.00000    0.75889  98.7%     -    0s
     0     0    0.78261    0   25   57.00000    0.78261  98.6%     -    0s
     0     0    0.78261    0   25   57.00000    0.78261  98.6%     -    0s
     0     0    0.78261    0   25   57.00000    0.78261  98.6%     -    0s
     0     0    0.78261    0   25   57.00000    0.78261  98.6%     -    0s
     0     2    0.95455    0   25   57.00000    0.95455  98.3%     -    0s
*   20    20              10      56.0000000    5.48485  90.2%  37.0    0s
*   50    40              17      55.0000000    5.53567  89.9%  29.5    0s
*  122    75              14      54.0000000   11.33690  79.0%  26.3    0s
*  183   103              11      53.0000000   17.50000  67.0%  25.8    0s
*  296   113              13      52.0000000   19.36842  62.8%  22.8    0s
*  508   165              13      50.0000000   26.58824  46.8%  21.0    0s

Explored 2947 nodes (55905 simplex iterations) in 1.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%