Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:36:37 2012 Optimize a model with 11387 rows, 3540 columns and 37465 nonzeros Presolve time: 0.10s Presolved: 11387 rows, 3540 columns, 37831 nonzeros Variable types: 0 continuous, 3540 integer (3540 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 2.000000e+00, 6499 iterations, 0.83 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 118 37.00000 2.00000 94.6% - 1s H 0 0 11.0000000 2.00000 81.8% - 1s H 0 0 6.0000000 2.00000 66.7% - 2s 0 0 2.00000 0 118 6.00000 2.00000 66.7% - 2s 0 0 2.00000 0 118 6.00000 2.00000 66.7% - 2s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 5s H 0 0 4.0000000 2.00000 50.0% - 8s 0 2 2.00000 0 118 4.00000 2.00000 50.0% - 8s 1 3 3.00000 1 701 4.00000 2.00000 50.0% 12106 13s 2 4 3.00000 1 386 4.00000 3.00000 25.0% 10692 17s 10 4 cutoff 5 4.00000 3.00000 25.0% 3271 20s 21 5 cutoff 8 4.00000 3.00000 25.0% 2728 25s 38 2 cutoff 4 4.00000 3.00000 25.0% 2156 31s Cutting planes: Clique: 37 Explored 45 nodes (107862 simplex iterations) in 33.98 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%