Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:48:30 2012 Optimize a model with 16730 rows, 20592 columns and 70068 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.30s Presolved: 16871 rows, 20590 columns, 90283 nonzeros Variable types: 0 continuous, 20590 integer (20590 binary) Found heuristic solution: objective 143.0000000 Root relaxation: objective 2.000000e+00, 11841 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 192 143.00000 2.00000 98.6% - 1s H 0 0 82.0000000 2.00000 97.6% - 1s H 0 0 3.0000000 2.00000 33.3% - 2s Cutting planes: Zero half: 1 Explored 0 nodes (36557 simplex iterations) in 2.09 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%