Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:20:31 2013

Optimize a model with 49840 rows, 49140 columns and 196140 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.22s
Presolved: 49770 rows, 49140 columns, 196070 nonzeros
Variable types: 49070 continuous, 70 integer (70 binary)

Root relaxation: objective 5.944292e+04, 6414 iterations, 4.64 seconds
Total elapsed time = 5.10s

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

     0     0 59442.9170    0   58          - 59442.9170     -      -    5s
H    0     0                    103884.00000 59442.9170  42.8%     -    8s
     0     0 83237.7203    0   14 103884.000 83237.7203  19.9%     -   15s
H    0     0                    95331.000000 83237.7203  12.7%     -   15s
     0     0 85213.6424    0    3 95331.0000 85213.6424  10.6%     -   17s
H    0     0                    89222.627824 85213.6424  4.49%     -   17s
H    0     0                    88809.000000 85213.6424  4.05%     -   17s
H    0     0                    85555.000000 85213.6424  0.40%     -   17s
     0     0     cutoff    0      85555.0000 85555.0000   0.0%     -   17s

Cutting planes:
  Implied bound: 68

Explored 0 nodes (14405 simplex iterations) in 17.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.555500000000e+04, best bound 8.555500000000e+04, gap 0.0%