Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:02:47 2012 Optimize a model with 13167 rows, 4032 columns and 43281 nonzeros Presolve time: 0.10s Presolved: 13167 rows, 4032 columns, 43501 nonzeros Variable types: 0 continuous, 4032 integer (4032 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 2.000000e+00, 3792 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 33.00000 2.00000 93.9% - 0s H 0 0 15.0000000 2.00000 86.7% - 0s H 0 0 6.0000000 2.00000 66.7% - 1s 0 0 2.00000 0 126 6.00000 2.00000 66.7% - 2s 0 0 2.00000 0 126 6.00000 2.00000 66.7% - 8s H 0 0 5.0000000 2.00000 60.0% - 8s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 14s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 28s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 33s 0 2 2.00000 0 126 5.00000 2.00000 60.0% - 47s 1 3 2.50000 1 189 5.00000 2.00000 60.0% 30519 56s 2 4 3.00000 1 812 5.00000 2.50000 50.0% 21766 63s 11 5 3.00000 2 572 5.00000 2.60000 48.0% 4930 66s 21 11 3.33333 8 220 5.00000 2.60000 48.0% 3272 70s * 46 8 21 4.0000000 2.60000 35.0% 1668 72s 61 7 3.00000 3 116 4.00000 3.00000 25.0% 1424 75s 64 4 cutoff 3 4.00000 3.00000 25.0% 1579 80s 76 2 cutoff 6 4.00000 3.00000 25.0% 1538 85s 94 2 cutoff 8 4.00000 3.00000 25.0% 1470 90s Cutting planes: Clique: 150 Explored 97 nodes (224782 simplex iterations) in 91.88 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%