Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:57:04 2013 Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros Presolve removed 5609 rows and 1713 columns Presolve time: 0.22s Presolved: 25304 rows, 1536 columns, 76988 nonzeros Variable types: 20 continuous, 1516 integer (1516 binary) Found heuristic solution: objective 73601.000000 Root relaxation: objective 6.385602e+04, 6842 iterations, 0.37 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63856.0208 0 10 73601.0000 63856.0208 13.2% - 0s H 0 0 63875.000000 63856.0208 0.03% - 0s H 0 0 63871.000000 63856.0208 0.02% - 0s H 0 0 63868.000000 63856.0208 0.02% - 0s 0 0 63857.9185 0 19 63868.0000 63857.9185 0.02% - 0s 0 0 63857.9185 0 9 63868.0000 63857.9185 0.02% - 0s H 0 0 63866.000000 63857.9185 0.01% - 0s 0 0 63858.0203 0 25 63866.0000 63858.0203 0.01% - 0s 0 1 63858.0834 0 25 63866.0000 63858.0834 0.01% - 0s * 53 11 35 63864.000000 63859.5168 0.01% 7.7 1s Cutting planes: Gomory: 4 Implied bound: 2 MIR: 11 Zero half: 3 Explored 54 nodes (8398 simplex iterations) in 1.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.386400000000e+04, best bound 6.386000000000e+04, gap 0.0063%