Gurobi 5.0.1 (linux64) logging started Sat Dec 1 02:21:08 2012
Optimize a model with 45500723 rows, 45500007 columns and 181744416 nonzeros
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Presolve removed 16779 rows and 16779 columns
Presolve time: 2053.75s
Presolved: 45483944 rows, 45483228 columns, 181710858 nonzeros
Variable types: 45355422 continuous, 127806 integer (127806 binary)
Found heuristic solution: objective 8840.0000000
Found heuristic solution: objective 6887.0000000
Explored 0 nodes (0 simplex iterations) in 3935.05 seconds
Thread count was 1 (of 16 available processors)
Time limit reached
Best objective 6.887000000000e+03, best bound -, gap -