Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:48:11 2012 Optimize a model with 16158 rows, 20592 columns and 68352 nonzeros Presolve removed 24 rows and 3148 columns Presolve time: 0.30s Presolved: 16134 rows, 17444 columns, 64980 nonzeros Variable types: 0 continuous, 17444 integer (17444 binary) Found heuristic solution: objective 143.0000000 Root relaxation: objective 2.000000e+00, 11051 iterations, 0.47 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 158 143.00000 2.00000 98.6% - 1s H 0 0 89.0000000 2.00000 97.8% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s H 0 0 3.0000000 2.00000 33.3% - 1s Cutting planes: Zero half: 1 Explored 0 nodes (38730 simplex iterations) in 1.87 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%