Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:39:03 2013 Optimize a model with 37942 rows, 37332 columns and 148962 nonzeros Presolve removed 61 rows and 0 columns Presolve time: 0.16s Presolved: 37881 rows, 37332 columns, 148901 nonzeros Variable types: 37271 continuous, 61 integer (61 binary) Root relaxation: objective 5.509114e+04, 6249 iterations, 3.66 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55091.1445 0 53 - 55091.1445 - - 4s H 0 0 86608.000000 55091.1445 36.4% - 7s 0 0 70630.4639 0 8 86608.0000 70630.4639 18.4% - 11s H 0 0 76390.062888 70630.4639 7.54% - 11s H 0 0 73857.000000 70630.4639 4.37% - 11s 0 0 71245.1882 0 4 73857.0000 71245.1882 3.54% - 11s H 0 0 73579.364504 71245.1882 3.17% - 11s H 0 0 72852.000000 71245.1882 2.21% - 11s 0 2 71246.7284 0 4 72852.0000 71246.7284 2.20% - 12s H 1 1 71928.602757 71246.7284 0.95% 0.0 12s H 5 5 71781.157312 71408.0054 0.52% 88.2 12s H 6 5 71778.837838 71408.0054 0.52% 101 13s H 7 5 71477.842105 71408.0054 0.10% 92.1 13s H 9 4 71475.977273 71408.0054 0.10% 98.6 13s * 11 4 9 71468.000000 71408.0054 0.08% 83.9 13s * 16 0 6 71443.000000 71443.0000 0.0% 86.8 13s Cutting planes: Implied bound: 57 Explored 17 nodes (12762 simplex iterations) in 13.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.144300000000e+04, best bound 7.144300000000e+04, gap 0.0%