Gurobi 5.0.1 (linux64) logging started Wed Nov 28 03:52:13 2012 Optimize a model with 43017 rows, 42945 columns and 169260 nonzeros Presolve removed 1239 rows and 1239 columns Presolve time: 0.26s Presolved: 41778 rows, 41706 columns, 166782 nonzeros Variable types: 40446 continuous, 1260 integer (1260 binary) Found heuristic solution: objective 6461.0000000 Found heuristic solution: objective 2792.0000000 Found heuristic solution: objective 2461.0000000 Root relaxation: objective 1.457333e+03, 29520 iterations, 4.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1457.33333 0 33 2461.00000 1457.33333 40.8% - 4s H 0 0 1647.0000000 1457.33333 11.5% - 4s H 0 0 1517.0000000 1457.33333 3.93% - 4s 0 0 1459.00000 0 32 1517.00000 1459.00000 3.82% - 5s 0 0 1459.00000 0 33 1517.00000 1459.00000 3.82% - 6s 0 0 1459.00000 0 32 1517.00000 1459.00000 3.82% - 6s 0 0 1462.00000 0 49 1517.00000 1462.00000 3.63% - 6s 0 0 1462.22222 0 65 1517.00000 1462.22222 3.61% - 6s 0 0 1464.30000 0 52 1517.00000 1464.30000 3.47% - 6s 0 0 1464.41667 0 52 1517.00000 1464.41667 3.47% - 6s 0 0 1464.41667 0 47 1517.00000 1464.41667 3.47% - 8s H 0 0 1499.0000000 1464.41667 2.31% - 8s H 0 0 1490.0000000 1464.41667 1.72% - 8s H 0 0 1484.0000000 1464.41667 1.32% - 8s 0 2 1464.60000 0 47 1484.00000 1464.60000 1.31% - 8s * 11 6 9 1475.0000000 1468.00000 0.47% 287 9s * 16 0 1 1473.0000000 1473.00000 0.0% 249 9s Cutting planes: Gomory: 5 Zero half: 1 Mod-K: 1 Explored 17 nodes (44232 simplex iterations) in 9.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.473000000000e+03, best bound 1.473000000000e+03, gap 0.0%