Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:20 2013 Optimize a model with 52 rows, 312 columns and 1906 nonzeros Presolve removed 22 rows and 79 columns Presolve time: 0.00s Presolved: 30 rows, 233 columns, 1664 nonzeros Variable types: 221 continuous, 12 integer (12 binary) Found heuristic solution: objective 5760.9660689 Root relaxation: objective 5.737611e+03, 12 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5737.61109 0 3 5760.96607 5737.61109 0.41% - 0s 0 0 5752.28364 0 5 5760.96607 5752.28364 0.15% - 0s 0 0 5752.28364 0 2 5760.96607 5752.28364 0.15% - 0s 0 0 5752.38799 0 5 5760.96607 5752.38799 0.15% - 0s 0 0 5752.45730 0 5 5760.96607 5752.45730 0.15% - 0s 0 0 5753.91350 0 1 5760.96607 5753.91350 0.12% - 0s 0 0 5753.91350 0 1 5760.96607 5753.91350 0.12% - 0s 0 2 5753.92749 0 1 5760.96607 5753.92749 0.12% - 0s * 2 0 1 5753.9274879 5753.92749 0.0% 3.0 0s Cutting planes: Flow cover: 1 Explored 3 nodes (83 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.753927487904e+03, best bound 5.753927487904e+03, gap 0.0%