Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:25:15 2012 Optimize a model with 13500 rows, 18360 columns and 58320 nonzeros Presolve removed 34 rows and 4590 columns Presolve time: 0.24s Presolved: 13466 rows, 13770 columns, 53730 nonzeros Variable types: 0 continuous, 13770 integer (13770 binary) Found heuristic solution: objective 47.0000000 Found heuristic solution: objective 3.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 22042 2.0000548e+00 4.495238e+01 0.000000e+00 5s 23982 2.0000000e+00 0.000000e+00 0.000000e+00 6s Root relaxation: objective 2.000000e+00, 23982 iterations, 6.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 164 3.00000 2.00000 33.3% - 10s 0 0 2.00000 0 287 3.00000 2.00000 33.3% - 14s 0 0 2.00000 0 370 3.00000 2.00000 33.3% - 23s 0 0 2.00000 0 164 3.00000 2.00000 33.3% - 32s 0 0 2.00000 0 268 3.00000 2.00000 33.3% - 43s 0 0 2.00000 0 266 3.00000 2.00000 33.3% - 53s 0 0 2.00000 0 287 3.00000 2.00000 33.3% - 71s 0 0 2.00000 0 266 3.00000 2.00000 33.3% - 83s 0 0 2.00000 0 268 3.00000 2.00000 33.3% - 95s 0 0 2.00000 0 268 3.00000 2.00000 33.3% - 102s 0 2 2.00000 0 268 3.00000 2.00000 33.3% - 118s 2 3 2.00000 1 268 3.00000 2.00000 33.3% 16505 120s 4 4 2.00000 1 164 3.00000 2.00000 33.3% 8252 130s 5 5 2.00000 1 288 3.00000 2.00000 33.3% 6602 148s 6 6 2.00000 1 164 3.00000 2.00000 33.3% 5502 158s 7 6 2.00000 1 268 3.00000 2.00000 33.3% 4716 173s 8 7 2.00000 1 164 3.00000 2.00000 33.3% 4126 196s 9 8 2.00000 1 164 3.00000 2.00000 33.3% 3668 211s 10 8 2.00000 1 164 3.00000 2.00000 33.3% 3301 236s 11 9 2.00000 1 164 3.00000 2.00000 33.3% 3001 247s 13 10 infeasible 15 3.00000 2.00000 33.3% 24377 266s Cutting planes: Gomory: 17 Zero half: 3 Explored 15 nodes (588773 simplex iterations) in 266.60 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%