Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:21:26 2012 Optimize a model with 12352 rows, 4160 columns and 40960 nonzeros Presolve time: 0.10s Presolved: 12352 rows, 4160 columns, 41173 nonzeros Variable types: 0 continuous, 4160 integer (4160 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 2.000000e+00, 4309 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 40.00000 2.00000 95.0% - 0s H 0 0 11.0000000 2.00000 81.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 7s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 12s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 19s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 25s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 31s H 0 0 4.0000000 2.00000 50.0% - 45s 0 2 2.00000 0 128 4.00000 2.00000 50.0% - 45s 1 3 3.00000 1 757 4.00000 2.00000 50.0% 39945 57s 2 4 3.00000 1 792 4.00000 3.00000 25.0% 41112 74s 3 5 3.00000 2 862 4.00000 3.00000 25.0% 27725 75s 8 4 cutoff 4 4.00000 3.00000 25.0% 13141 81s 14 4 3.00000 2 363 4.00000 3.00000 25.0% 8571 85s 43 3 3.00000 3 255 4.00000 3.00000 25.0% 3267 90s 62 2 cutoff 8 4.00000 3.00000 25.0% 2668 95s Cutting planes: Clique: 118 Explored 65 nodes (252602 simplex iterations) in 96.87 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%