Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:46:48 2012 Optimize a model with 5643 rows, 9900 columns and 26433 nonzeros Presolve removed 30 rows and 2970 columns Presolve time: 0.14s Presolved: 5613 rows, 6930 columns, 23463 nonzeros Variable types: 0 continuous, 6930 integer (6930 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 2.000000e+00, 5452 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 44 26.00000 2.00000 92.3% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s H 0 0 3.0000000 2.00000 33.3% - 0s 0 0 2.00000 0 143 3.00000 2.00000 33.3% - 1s 0 0 2.00000 0 186 3.00000 2.00000 33.3% - 3s 0 0 2.00000 0 120 3.00000 2.00000 33.3% - 5s 0 0 2.00000 0 186 3.00000 2.00000 33.3% - 6s 0 0 2.00000 0 110 3.00000 2.00000 33.3% - 7s 0 0 2.00000 0 120 3.00000 2.00000 33.3% - 8s 0 0 2.00000 0 163 3.00000 2.00000 33.3% - 10s 0 0 2.00000 0 163 3.00000 2.00000 33.3% - 11s 0 2 2.00000 0 163 3.00000 2.00000 33.3% - 12s 5 5 2.00000 1 186 3.00000 2.00000 33.3% 1973 16s 7 6 2.00000 1 44 3.00000 2.00000 33.3% 1409 21s 9 8 2.00000 1 44 3.00000 2.00000 33.3% 1096 26s 11 9 2.00000 1 44 3.00000 2.00000 33.3% 897 31s 15 12 infeasible 16 3.00000 2.00000 33.3% 10109 35s Cutting planes: Gomory: 6 Zero half: 4 Explored 17 nodes (267330 simplex iterations) in 35.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%