Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:19:23 2013 Optimize a model with 892 rows, 14933 columns and 617969 nonzeros Presolve removed 42 rows and 260 columns (presolve time = 5s) ... Presolve removed 42 rows and 260 columns Presolve time: 5.08s Presolved: 850 rows, 14673 columns, 604260 nonzeros Variable types: 0 continuous, 14673 integer (14673 binary) Found heuristic solution: objective 6769.0000000 Root relaxation: objective 5.302333e+03, 3883 iterations, 1.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5302.33333 0 81 6769.00000 5302.33333 21.7% - 6s H 0 0 5373.0000000 5302.33333 1.32% - 7s 0 0 5313.25000 0 49 5373.00000 5313.25000 1.11% - 7s H 0 0 5365.0000000 5313.25000 0.96% - 11s 0 0 5314.00000 0 30 5365.00000 5314.00000 0.95% - 11s * 0 0 0 5314.0000000 5314.00000 0.0% - 12s Cutting planes: Gomory: 1 Clique: 1 Zero half: 2 Explored 0 nodes (7423 simplex iterations) in 12.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.314000000000e+03, best bound 5.314000000000e+03, gap 0.0%