Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:13:22 2013 Optimize a model with 834 rows, 11644 columns and 531747 nonzeros Presolve removed 59 rows and 283 columns Presolve time: 3.29s Presolved: 775 rows, 11361 columns, 519222 nonzeros Variable types: 0 continuous, 11361 integer (11361 binary) Found heuristic solution: objective 7150.0000000 Root relaxation: objective 4.666750e+03, 2823 iterations, 0.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4666.75000 0 44 7150.00000 4666.75000 34.7% - 4s H 0 0 6012.0000000 4666.75000 22.4% - 4s H 0 0 4697.0000000 4666.75000 0.64% - 4s * 0 0 0 4668.0000000 4668.00000 0.0% - 4s Cutting planes: Clique: 6 Zero half: 7 Explored 0 nodes (3223 simplex iterations) in 4.95 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.668000000000e+03, best bound 4.668000000000e+03, gap 0.0%