Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:41:09 2012 Optimize a model with 4814 rows, 2070 columns and 16288 nonzeros Presolve removed 992 rows and 2 columns Presolve time: 0.12s Presolved: 3867 rows, 2068 columns, 15803 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 3.000000e+00, 3390 iterations, 0.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 645 45.00000 3.00000 93.3% - 1s H 0 0 42.0000000 3.00000 92.9% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 638 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 467 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 276 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 97 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 83 4.00000 3.00000 25.0% - 9s 0 2 3.00000 0 83 4.00000 3.00000 25.0% - 10s 6 6 3.00000 1 93 4.00000 3.00000 25.0% 420 16s 10 8 3.00000 1 77 4.00000 3.00000 25.0% 252 21s 13 10 3.00000 1 101 4.00000 3.00000 25.0% 194 26s 17 15 3.00000 16 77 4.00000 3.00000 25.0% 5241 30s Cutting planes: Gomory: 2 Zero half: 11 Explored 22 nodes (144173 simplex iterations) in 30.74 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%