Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:22:21 2012

Optimize a model with 249 rows, 193 columns and 813 nonzeros
Presolve time: 0.00s
Presolved: 249 rows, 193 columns, 813 nonzeros
Variable types: 0 continuous, 193 integer (193 binary)
Found heuristic solution: objective 56.0000000

Root relaxation: objective 0.000000e+00, 107 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   68   56.00000    0.00000   100%     -    0s
H    0     0                      42.0000000    0.00000   100%     -    0s
     0     0    0.50000    0   69   42.00000    0.50000  98.8%     -    0s
H    0     0                      36.0000000    0.50000  98.6%     -    0s
     0     0    0.50000    0   69   36.00000    0.50000  98.6%     -    0s
     0     0    0.51111    0   70   36.00000    0.51111  98.6%     -    0s
     0     0    0.51111    0   71   36.00000    0.51111  98.6%     -    0s
     0     0    0.51111    0   70   36.00000    0.51111  98.6%     -    0s
     0     2    0.69697    0   70   36.00000    0.69697  98.1%     -    0s
*   42    38              28      25.0000000    3.93404  84.3%  16.7    0s
*   73    46              18      24.0000000    4.15550  82.7%  17.0    0s
*  168    96              15      23.0000000   10.13144  56.0%  19.1    0s
*  182    88              14      22.0000000   10.13144  53.9%  18.1    0s
*  921   156              21      21.0000000   14.58881  30.5%  15.6    0s

Cutting planes:
  Gomory: 1
  Mod-K: 1

Explored 1195 nodes (19929 simplex iterations) in 0.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%