Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:57:49 2013 Optimize a model with 34279 rows, 3481 columns and 104430 nonzeros Presolve removed 3033 rows and 1770 columns Presolve time: 0.22s Presolved: 31246 rows, 1711 columns, 95026 nonzeros Variable types: 23 continuous, 1688 integer (1688 binary) Found heuristic solution: objective 89759.000000 Root relaxation: objective 6.971336e+04, 9847 iterations, 0.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69713.3636 0 13 89759.0000 69713.3636 22.3% - 0s H 0 0 69739.000000 69713.3636 0.04% - 0s H 0 0 69738.000000 69713.3636 0.04% - 1s H 0 0 69736.000000 69713.3636 0.03% - 1s 0 0 69714.0000 0 16 69736.0000 69714.0000 0.03% - 1s 0 0 69714.0000 0 11 69736.0000 69714.0000 0.03% - 1s H 0 0 69729.000000 69714.0000 0.02% - 1s H 0 0 69728.000000 69714.0000 0.02% - 1s 0 0 69714.0000 0 20 69728.0000 69714.0000 0.02% - 1s 0 2 69714.0000 0 11 69728.0000 69714.0000 0.02% - 1s H 122 74 69727.000000 69715.4078 0.02% 19.2 1s H 183 80 69724.000000 69716.4488 0.01% 15.4 1s Cutting planes: Gomory: 10 Cover: 1 MIR: 31 Zero half: 8 Explored 228 nodes (15607 simplex iterations) in 1.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.972400000000e+04, best bound 6.971800000000e+04, gap 0.0086%