Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:15:33 2012 Optimize a model with 23546 rows, 28056 columns and 97860 nonzeros Presolve removed 35 rows and 5513 columns Presolve time: 0.51s Presolved: 23511 rows, 22543 columns, 92067 nonzeros Variable types: 0 continuous, 22543 integer (22543 binary) Found heuristic solution: objective 167.0000000 Root relaxation: objective 2.000000e+00, 16238 iterations, 0.87 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 244 167.00000 2.00000 98.8% - 2s H 0 0 71.0000000 2.00000 97.2% - 2s H 0 0 4.0000000 2.00000 50.0% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s Cutting planes: Zero half: 1 Explored 0 nodes (52217 simplex iterations) in 3.07 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%