Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:04:44 2012 Optimize a model with 58785 rows, 49062 columns and 224313 nonzeros Presolve removed 17 rows and 3317 columns Presolve time: 1.31s Presolved: 58768 rows, 45745 columns, 220466 nonzeros Variable types: 0 continuous, 45745 integer (45745 binary) Found heuristic solution: objective 221.0000000 Root relaxation: objective 2.000000e+00, 31877 iterations, 2.70 seconds Total elapsed time = 8.08s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 402 221.00000 2.00000 99.1% - 9s H 0 0 216.0000000 2.00000 99.1% - 9s H 0 0 4.0000000 2.00000 50.0% - 9s 0 0 2.20000 0 9516 4.00000 2.20000 45.0% - 43s H 0 0 3.0000000 2.20000 26.7% - 54s Cutting planes: Gomory: 2 Zero half: 7 Explored 0 nodes (146537 simplex iterations) in 54.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%