Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:34:24 2013 Optimize a model with 2625 rows, 625 columns and 8125 nonzeros Presolve removed 310 rows and 310 columns Presolve time: 0.02s Presolved: 2315 rows, 315 columns, 7275 nonzeros Variable types: 15 continuous, 300 integer (300 binary) Found heuristic solution: objective 9650.0000000 Root relaxation: objective 6.478287e+03, 1539 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6478.28696 0 8 9650.00000 6478.28696 32.9% - 0s H 0 0 6492.0000000 6478.28696 0.21% - 0s H 0 0 6491.0000000 6478.28696 0.20% - 0s 0 0 6480.45279 0 24 6491.00000 6480.45279 0.16% - 0s 0 0 6480.45279 0 9 6491.00000 6480.45279 0.16% - 0s 0 0 6480.45279 0 22 6491.00000 6480.45279 0.16% - 0s 0 0 6480.93439 0 28 6491.00000 6480.93439 0.16% - 0s 0 0 6481.29718 0 28 6491.00000 6481.29718 0.15% - 0s H 0 0 6486.0000000 6481.29718 0.07% - 0s 0 0 6481.38523 0 26 6486.00000 6481.38523 0.07% - 0s H 0 0 6485.0000000 6481.38523 0.06% - 0s 0 1 6481.39183 0 26 6485.00000 6481.39183 0.06% - 0s Cutting planes: Gomory: 9 Cover: 4 Implied bound: 1 Clique: 1 MIR: 20 Zero half: 4 Explored 41 nodes (2193 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.485000000000e+03, best bound 6.485000000000e+03, gap 0.0%