Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:43:42 2012 Optimize a model with 13871 rows, 18632 columns and 59566 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.23s Presolved: 14005 rows, 18630 columns, 77858 nonzeros Variable types: 0 continuous, 18630 integer (18630 binary) Found heuristic solution: objective 136.0000000 Root relaxation: objective 2.000000e+00, 9680 iterations, 0.37 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 150 136.00000 2.00000 98.5% - 1s H 0 0 62.0000000 2.00000 96.8% - 1s H 0 0 3.0000000 2.00000 33.3% - 1s Cutting planes: Zero half: 1 Explored 0 nodes (30631 simplex iterations) in 1.48 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%