Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:37:20 2012

Optimize a model with 551 rows, 513 columns and 1888 nonzeros
Presolve removed 0 rows and 17 columns
Presolve time: 0.00s
Presolved: 551 rows, 496 columns, 1871 nonzeros
Variable types: 0 continuous, 496 integer (495 binary)
Found heuristic solution: objective 120.0000000

Root relaxation: objective 0.000000e+00, 314 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  215  120.00000    0.00000   100%     -    0s
H    0     0                      95.0000000    0.00000   100%     -    0s
H    0     0                      83.0000000    0.00000   100%     -    0s
H    0     0                      79.0000000    0.00000   100%     -    0s
     0     0    0.29860    0  217   79.00000    0.29860   100%     -    0s
H    0     0                      66.0000000    0.29860   100%     -    0s
H    0     0                      53.0000000    0.29860  99.4%     -    0s
     0     0    0.76351    0  222   53.00000    0.76351  98.6%     -    0s
H    0     0                      39.0000000    0.76351  98.0%     -    0s
     0     0    0.76351    0  224   39.00000    0.76351  98.0%     -    0s
     0     0    0.76351    0  221   39.00000    0.76351  98.0%     -    0s
     0     2    0.76569    0  221   39.00000    0.76569  98.0%     -    0s
H   54    41                      20.0000000    1.00000  95.0%  32.0    0s
H  108    66                      18.0000000    1.00000  94.4%  28.8    0s
  3659   638   14.61364   23  202   18.00000   12.96296  28.0%  24.0    5s
  8370   161   16.08075   23  184   18.00000   15.73171  12.6%  20.9   10s

Explored 8630 nodes (182743 simplex iterations) in 10.24 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%