Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:00:22 2012

Optimize a model with 577 rows, 528 columns and 1968 nonzeros
Presolve removed 0 rows and 18 columns
Presolve time: 0.00s
Presolved: 577 rows, 510 columns, 1950 nonzeros
Variable types: 0 continuous, 510 integer (509 binary)
Found heuristic solution: objective 113.0000000

Root relaxation: objective 0.000000e+00, 319 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  219  113.00000    0.00000   100%     -    0s
H    0     0                      76.0000000    0.00000   100%     -    0s
     0     0    0.45108    0  222   76.00000    0.45108  99.4%     -    0s
H    0     0                      65.0000000    0.45108  99.3%     -    0s
     0     0    0.84845    0  223   65.00000    0.84845  98.7%     -    0s
H    0     0                      51.0000000    0.84845  98.3%     -    0s
H    0     0                      45.0000000    0.84845  98.1%     -    0s
     0     2    0.85177    0  222   45.00000    0.85177  98.1%     -    0s
H   40    40                      29.0000000    1.90472  93.4%  38.4    0s
H   54    54                      26.0000000    1.90472  92.7%  30.6    0s
*   70    51              40      22.0000000    1.90472  91.3%  26.0    0s
H  413   178                      21.0000000    7.37135  64.9%  26.9    0s
H  572   185                      20.0000000    9.17318  54.1%  26.4    0s

Cutting planes:
  Gomory: 2
  Zero half: 2

Explored 2006 nodes (54950 simplex iterations) in 2.96 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%