Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:22:45 2012

Optimize a model with 533 rows, 481 columns and 1811 nonzeros
Presolve removed 0 rows and 17 columns
Presolve time: 0.00s
Presolved: 533 rows, 464 columns, 1794 nonzeros
Variable types: 0 continuous, 464 integer (463 binary)
Found heuristic solution: objective 94.0000000

Root relaxation: objective 0.000000e+00, 251 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  195   94.00000    0.00000   100%     -    0s
H    0     0                      77.0000000    0.00000   100%     -    0s
H    0     0                      74.0000000    0.00000   100%     -    0s
     0     0    0.43907    0  196   74.00000    0.43907  99.4%     -    0s
H    0     0                      64.0000000    0.43907  99.3%     -    0s
     0     0    1.00000    0  199   64.00000    1.00000  98.4%     -    0s
H    0     0                      51.0000000    1.00000  98.0%     -    0s
     0     0    1.00000    0  199   51.00000    1.00000  98.0%     -    0s
     0     2    1.00000    0  199   51.00000    1.00000  98.0%     -    0s
H   27    27                      39.0000000    1.00000  97.4%  69.8    0s
H   32    32                      23.0000000    1.00000  95.7%  64.3    0s
*   71    45              42      22.0000000    1.00000  95.5%  37.8    0s
*  117    58              32      21.0000000    1.20263  94.3%  35.6    0s
*  147    60              21      20.0000000    1.23494  93.8%  35.7    0s
*  489   179              14      19.0000000    5.01874  73.6%  36.2    0s
  3789   547   15.87500   23  197   19.00000   13.77778  27.5%  23.7    5s

Explored 6497 nodes (145035 simplex iterations) in 7.86 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%