Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:31:27 2012 Optimize a model with 12936 rows, 6006 columns and 44506 nonzeros Presolve removed 1772 rows and 77 columns Presolve time: 0.27s Presolved: 11164 rows, 5929 columns, 40271 nonzeros Variable types: 0 continuous, 5929 integer (5929 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 3.000000e+00, 11357 iterations, 2.11 seconds Total elapsed time = 5.28s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 119 44.00000 3.00000 93.2% - 5s H 0 0 4.0000000 3.00000 25.0% - 5s 0 0 3.00000 0 148 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 48 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 186 4.00000 3.00000 25.0% - 24s 0 0 3.00000 0 218 4.00000 3.00000 25.0% - 31s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 36s 0 2 3.00000 0 128 4.00000 3.00000 25.0% - 39s 2 3 3.00000 1 128 4.00000 3.00000 25.0% 2698 40s 4 4 3.00000 1 89 4.00000 3.00000 25.0% 1349 46s 6 6 3.00000 1 62 4.00000 3.00000 25.0% 899 52s 7 6 3.00000 1 64 4.00000 3.00000 25.0% 771 61s 10 8 3.00000 1 104 4.00000 3.00000 25.0% 540 66s 12 10 3.00000 1 231 4.00000 3.00000 25.0% 450 82s 13 10 3.00000 1 82 4.00000 3.00000 25.0% 415 85s 20 11 3.00000 18 102 4.00000 3.00000 25.0% 10112 90s Cutting planes: Gomory: 3 Zero half: 12 Explored 38 nodes (379193 simplex iterations) in 94.83 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%