Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:02:59 2012 Optimize a model with 21623 rows, 25440 columns and 89515 nonzeros Presolve removed 29 rows and 4295 columns Presolve time: 0.46s Presolved: 21594 rows, 21145 columns, 84950 nonzeros Variable types: 0 continuous, 21145 integer (21145 binary) Found heuristic solution: objective 159.0000000 Root relaxation: objective 2.000000e+00, 14880 iterations, 0.82 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 228 159.00000 2.00000 98.7% - 2s H 0 0 155.0000000 2.00000 98.7% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s Cutting planes: Zero half: 1 Explored 0 nodes (48174 simplex iterations) in 2.77 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%