Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:52:03 2012 Optimize a model with 12771 rows, 3906 columns and 41910 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.35s Presolved: 12831 rows, 3904 columns, 45342 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2683 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 62.00000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 175 5.00000 2.66667 46.7% - 2s 0 0 2.67039 0 3679 5.00000 2.67039 46.6% - 2s 0 0 2.67039 0 3703 5.00000 2.67039 46.6% - 4s 0 0 2.67039 0 3369 5.00000 2.67039 46.6% - 10s 0 0 2.67039 0 3350 5.00000 2.67039 46.6% - 13s 0 0 2.67039 0 3386 5.00000 2.67039 46.6% - 18s 0 0 2.67039 0 3471 5.00000 2.67039 46.6% - 21s 0 0 2.67039 0 3418 5.00000 2.67039 46.6% - 25s 0 0 2.67039 0 3446 5.00000 2.67039 46.6% - 30s 0 0 2.67039 0 3412 5.00000 2.67039 46.6% - 33s 0 0 2.67039 0 3294 5.00000 2.67039 46.6% - 37s 0 0 2.67039 0 3413 5.00000 2.67039 46.6% - 41s 0 0 2.67039 0 3412 5.00000 2.67039 46.6% - 43s 0 2 2.80000 0 3411 5.00000 2.80000 44.0% - 52s * 19 5 11 4.0000000 3.00000 25.0% 582 54s 24 0 cutoff 1 4.00000 4.00000 0.0% 720 56s Cutting planes: Clique: 96 Zero half: 8 Explored 25 nodes (119439 simplex iterations) in 56.03 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%