Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:42:25 2012

Optimize a model with 577 rows, 519 columns and 1959 nonzeros
Presolve removed 0 rows and 21 columns
Presolve time: 0.00s
Presolved: 577 rows, 498 columns, 1938 nonzeros
Variable types: 0 continuous, 498 integer (497 binary)
Found heuristic solution: objective 105.0000000

Root relaxation: objective 0.000000e+00, 287 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  201  105.00000    0.00000   100%     -    0s
H    0     0                      74.0000000    0.00000   100%     -    0s
     0     0    0.29815    0  203   74.00000    0.29815   100%     -    0s
H    0     0                      64.0000000    0.29815   100%     -    0s
     0     0    0.90918    0  206   64.00000    0.90918  98.6%     -    0s
H    0     0                      56.0000000    0.90918  98.4%     -    0s
     0     0    0.90918    0  208   56.00000    0.90918  98.4%     -    0s
     0     0    0.90918    0  208   56.00000    0.90918  98.4%     -    0s
     0     2    0.93012    0  208   56.00000    0.93012  98.3%     -    0s
H   27    27                      51.0000000    1.00000  98.0%  42.8    0s
*   46    38              26      24.0000000    1.00000  95.8%  36.7    0s
*  203   127              12      23.0000000    6.00000  73.9%  39.9    0s

Cutting planes:
  Gomory: 3
  Zero half: 1
  Mod-K: 1

Explored 2160 nodes (71776 simplex iterations) in 3.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%