Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:06:46 2012 Optimize a model with 54807 rows, 49062 columns and 212379 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 1.32s Presolved: 55026 rows, 49060 columns, 260724 nonzeros Variable types: 0 continuous, 49060 integer (49060 binary) Found heuristic solution: objective 221.0000000 Root relaxation: objective 2.000000e+00, 32004 iterations, 2.94 seconds Total elapsed time = 8.13s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 386 221.00000 2.00000 99.1% - 9s H 0 0 199.0000000 2.00000 99.0% - 9s H 0 0 4.0000000 2.00000 50.0% - 9s H 0 0 3.0000000 2.00000 33.3% - 9s Cutting planes: Zero half: 37 Explored 0 nodes (103999 simplex iterations) in 9.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 2.000000000000e+00, gap 33.3333%