Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:43:36 2012 Optimize a model with 13268 rows, 3906 columns and 43462 nonzeros Presolve time: 0.10s Presolved: 13268 rows, 3906 columns, 43760 nonzeros Variable types: 0 continuous, 3906 integer (3906 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 2.000000e+00, 3457 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 38.00000 2.00000 94.7% - 0s H 0 0 13.0000000 2.00000 84.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 14s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 19s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 25s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 29s 0 2 2.00000 0 124 5.00000 2.00000 60.0% - 42s 1 3 3.00000 1 806 5.00000 2.00000 60.0% 25765 50s 2 4 3.00000 1 458 5.00000 3.00000 40.0% 33239 67s 8 9 4.00000 6 104 5.00000 3.00000 40.0% 9069 70s * 37 6 20 4.0000000 3.00000 25.0% 2045 73s 40 7 3.00000 3 506 4.00000 3.00000 25.0% 2016 75s 44 5 cutoff 5 4.00000 3.00000 25.0% 2186 80s 47 4 cutoff 4 4.00000 3.00000 25.0% 2315 85s 62 3 3.00000 4 116 4.00000 3.00000 25.0% 2003 90s Cutting planes: Clique: 180 Zero half: 30 Explored 66 nodes (205906 simplex iterations) in 93.53 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%