Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:25:09 2012 Optimize a model with 7535 rows, 3080 columns and 25465 nonzeros Presolve removed 1705 rows and 0 columns Presolve time: 0.14s Presolved: 5830 rows, 3080 columns, 21450 nonzeros Variable types: 0 continuous, 3080 integer (3080 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.000000e+00, 6099 iterations, 0.80 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 109 29.00000 3.00000 89.7% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 202 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 168 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 151 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 179 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 182 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 172 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 176 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 24s 0 0 3.00000 0 183 4.00000 3.00000 25.0% - 27s 0 0 3.00000 0 183 4.00000 3.00000 25.0% - 28s 0 2 3.00000 0 183 4.00000 3.00000 25.0% - 31s 4 4 3.00000 1 102 4.00000 3.00000 25.0% 990 35s 7 6 3.00000 1 153 4.00000 3.00000 25.0% 566 42s 8 7 3.00000 1 129 4.00000 3.00000 25.0% 495 47s 9 8 3.00000 1 165 4.00000 3.00000 25.0% 440 53s 10 8 3.00000 1 165 4.00000 3.00000 25.0% 396 55s 12 10 infeasible 15 4.00000 3.00000 25.0% 9681 60s 14 11 3.00000 16 92 4.00000 3.00000 25.0% 8370 65s 17 13 3.00000 17 86 4.00000 3.00000 25.0% 7027 70s 32 5 3.00000 18 112 4.00000 3.00000 25.0% 4207 75s Cutting planes: Gomory: 2 Zero half: 15 Explored 42 nodes (274016 simplex iterations) in 77.90 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%