Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:12:13 2012 Optimize a model with 3144 rows, 1406 columns and 10654 nonzeros Presolve removed 520 rows and 2 columns Presolve time: 0.10s Presolved: 2661 rows, 1404 columns, 10771 nonzeros Variable types: 0 continuous, 1404 integer (1404 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 3.000000e+00, 2043 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 44 37.00000 3.00000 91.9% - 0s H 0 0 15.0000000 3.00000 80.0% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 141 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 24 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 69 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 71 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 69 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 42 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 387 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 82 4.00000 3.00000 25.0% - 4s 0 2 3.00000 0 82 4.00000 3.00000 25.0% - 4s 2 3 3.00000 1 82 4.00000 3.00000 25.0% 418 5s 13 12 3.00000 13 79 4.00000 3.00000 25.0% 2989 10s Cutting planes: Gomory: 12 Zero half: 7 Explored 21 nodes (83349 simplex iterations) in 11.77 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%