Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:45:27 2012 Optimize a model with 5335 rows, 2162 columns and 17938 nonzeros Presolve removed 1106 rows and 2 columns Presolve time: 0.12s Presolved: 4229 rows, 2160 columns, 15086 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 3.000000e+00, 3702 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 862 46.00000 3.00000 93.5% - 1s H 0 0 37.0000000 3.00000 91.9% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 1357 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 436 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 91 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 89 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 74 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 93 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 12s 0 2 3.00000 0 74 4.00000 3.00000 25.0% - 13s 2 3 3.00000 1 94 4.00000 3.00000 25.0% 1490 15s 6 6 3.00000 1 105 4.00000 3.00000 25.0% 497 21s 8 7 3.00000 1 101 4.00000 3.00000 25.0% 372 27s 11 11 3.00000 11 93 4.00000 3.00000 25.0% 5859 30s 24 10 3.00000 14 85 4.00000 3.00000 25.0% 2913 35s 26 10 3.00000 15 1250 4.00000 3.00000 25.0% 2792 51s 27 11 3.00000 15 1277 4.00000 3.00000 25.0% 2761 57s Cutting planes: Gomory: 7 Zero half: 24 Explored 50 nodes (152368 simplex iterations) in 59.08 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%