Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:19:23 2012 Optimize a model with 18000 rows, 5256 columns and 58968 nonzeros Presolve time: 0.14s Presolved: 18000 rows, 5256 columns, 59081 nonzeros Variable types: 0 continuous, 5256 integer (5256 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 2.000000e+00, 4070 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 0 144 47.00000 2.00000 95.7% - 0s H 0 0 18.0000000 2.00000 88.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 17s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 26s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 38s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 48s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 56s 0 2 2.00000 0 144 5.00000 2.00000 60.0% - 85s 1 3 3.00000 1 140 5.00000 2.00000 60.0% 51613 98s 2 4 3.00000 1 1081 5.00000 3.00000 40.0% 41221 110s 4 4 3.33333 2 546 5.00000 3.00000 40.0% 26837 119s 12 8 4.00000 8 128 5.00000 3.00000 40.0% 9290 120s * 26 6 20 4.0000000 3.00000 25.0% 4324 120s 36 2 cutoff 5 4.00000 3.00000 25.0% 3667 127s 38 2 3.00000 2 352 4.00000 3.00000 25.0% 3845 131s 42 0 cutoff 4 4.00000 4.00000 0.0% 3991 136s Cutting planes: Clique: 145 Explored 43 nodes (284776 simplex iterations) in 136.96 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%