Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:36:25 2012 Optimize a model with 9844 rows, 3080 columns and 32338 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.21s Presolved: 9842 rows, 3078 columns, 31980 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 2.000000e+00, 2223 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 110 55.00000 2.00000 96.4% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 200 5.00000 2.66667 46.7% - 1s 0 0 2.67516 0 2709 5.00000 2.67516 46.5% - 1s 0 0 2.67516 0 2716 5.00000 2.67516 46.5% - 2s 0 0 2.67516 0 2407 5.00000 2.67516 46.5% - 4s 0 0 2.67516 0 2426 5.00000 2.67516 46.5% - 5s 0 0 2.67516 0 2369 5.00000 2.67516 46.5% - 7s 0 0 2.67516 0 2402 5.00000 2.67516 46.5% - 8s 0 0 2.67516 0 2255 5.00000 2.67516 46.5% - 10s 0 0 2.67516 0 2392 5.00000 2.67516 46.5% - 11s 0 0 2.67516 0 2338 5.00000 2.67516 46.5% - 12s 0 0 2.67516 0 2371 5.00000 2.67516 46.5% - 14s 0 0 2.67516 0 2370 5.00000 2.67516 46.5% - 14s 0 2 3.00000 0 2370 5.00000 3.00000 40.0% - 18s 2 4 4.00000 2 124 5.00000 3.00000 40.0% 3713 20s * 15 4 14 4.0000000 3.00000 25.0% 582 20s Cutting planes: Clique: 105 Zero half: 13 Explored 24 nodes (54986 simplex iterations) in 20.28 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%