Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:47:36 2013 Optimize a model with 3682 rows, 784 columns and 11368 nonzeros Presolve removed 465 rows and 391 columns Presolve time: 0.03s Presolved: 3217 rows, 393 columns, 10101 nonzeros Variable types: 18 continuous, 375 integer (375 binary) Found heuristic solution: objective 18407.000000 Found heuristic solution: objective 16372.000000 Found heuristic solution: objective 15458.000000 Root relaxation: objective 1.264260e+04, 2968 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12642.6000 0 12 15458.0000 12642.6000 18.2% - 0s H 0 0 12663.000000 12642.6000 0.16% - 0s H 0 0 12657.000000 12642.6000 0.11% - 0s 0 0 12643.0000 0 21 12657.0000 12643.0000 0.11% - 0s 0 0 12643.0000 0 10 12657.0000 12643.0000 0.11% - 0s H 0 0 12655.000000 12643.0000 0.09% - 0s 0 0 12643.0012 0 29 12655.0000 12643.0012 0.09% - 0s 0 2 12643.0311 0 29 12655.0000 12643.0311 0.09% - 0s H 1 2 12653.000000 12643.0311 0.08% 0.0 0s H 52 1 12651.000000 12646.9700 0.03% 21.0 0s Cutting planes: Gomory: 9 Implied bound: 1 Clique: 1 MIR: 31 Zero half: 7 Explored 80 nodes (4882 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.265100000000e+04, best bound 1.265100000000e+04, gap 0.0%