Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:38:42 2012 Optimize a model with 12991 rows, 4160 columns and 42814 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.40s Presolved: 13053 rows, 4158 columns, 46504 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 3163 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 64.00000 2.00000 96.9% - 0s H 0 0 63.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 1902 5.00000 3.00000 40.0% - 2s 0 0 3.00813 0 2772 5.00000 3.00813 39.8% - 3s 0 0 3.00813 0 2790 5.00000 3.00813 39.8% - 5s 0 0 3.00813 0 2656 5.00000 3.00813 39.8% - 10s 0 0 3.00813 0 2458 5.00000 3.00813 39.8% - 18s 0 0 3.00813 0 2563 5.00000 3.00813 39.8% - 25s 0 0 3.00813 0 2532 5.00000 3.00813 39.8% - 31s 0 0 3.00813 0 2462 5.00000 3.00813 39.8% - 37s 0 0 3.00813 0 2599 5.00000 3.00813 39.8% - 41s 0 0 3.00813 0 2667 5.00000 3.00813 39.8% - 47s 0 0 3.00813 0 2567 5.00000 3.00813 39.8% - 53s 0 0 3.00813 0 2619 5.00000 3.00813 39.8% - 58s 0 0 3.00813 0 1984 5.00000 3.00813 39.8% - 64s H 0 0 4.0000000 3.00813 24.8% - 64s Cutting planes: Clique: 9 Zero half: 1 Explored 0 nodes (245378 simplex iterations) in 64.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%