Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:35 2013

Optimize a model with 108 rows, 81 columns and 288 nonzeros
Presolve removed 36 rows and 36 columns
Presolve time: 0.00s
Presolved: 72 rows, 45 columns, 216 nonzeros
Variable types: 9 continuous, 36 integer (36 binary)
Found heuristic solution: objective 2764.0000000

Root relaxation: objective 4.200000e+02, 31 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0  420.00000    0   28 2764.00000  420.00000  84.8%     -    0s
     0     0  684.33819    0   24 2764.00000  684.33819  75.2%     -    0s
     0     0  689.55359    0   24 2764.00000  689.55359  75.1%     -    0s
     0     0  689.55359    0   25 2764.00000  689.55359  75.1%     -    0s
     0     0  689.55359    0   25 2764.00000  689.55359  75.1%     -    0s
H    0     0                    1774.0000000  689.55359  61.1%     -    0s
     0     2  690.00586    0   25 1774.00000  690.00586  61.1%     -    0s
*  181   120              14    1587.0000000  826.31765  47.9%   4.3    0s
*  220   138              16    1566.0000000  855.45336  45.4%   4.2    0s
H 1981   289                    1555.0000000 1040.51628  33.1%   4.0    0s

Cutting planes:
  Gomory: 10
  Implied bound: 1
  MIR: 25

Explored 5030 nodes (15359 simplex iterations) in 0.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.555000000000e+03, best bound 1.554916446068e+03, gap 0.0054%