Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:11:23 2012 Optimize a model with 21608 rows, 5402 columns and 69934 nonzeros Presolve time: 0.12s Presolved: 21608 rows, 5402 columns, 70126 nonzeros Variable types: 0 continuous, 5402 integer (5402 binary) Found heuristic solution: objective 46.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 15845 1.9281173e+00 1.841445e+03 0.000000e+00 5s 21729 2.0000000e+00 0.000000e+00 0.000000e+00 9s Root relaxation: objective 2.000000e+00, 21729 iterations, 8.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 46.00000 2.00000 95.7% - 8s H 0 0 17.0000000 2.00000 88.2% - 8s H 0 0 5.0000000 2.00000 60.0% - 8s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 11s 0 2 2.00000 0 146 5.00000 2.00000 60.0% - 12s 1 3 3.00000 1 306 5.00000 2.00519 59.9% 34292 29s 2 4 3.00000 1 761 5.00000 3.00000 40.0% 31872 42s 6 4 3.25000 3 207 5.00000 3.00000 40.0% 12692 47s 7 5 3.33333 3 310 5.00000 3.00000 40.0% 13294 51s H 11 3 4.0000000 3.00000 25.0% 8568 52s 16 2 3.00000 3 142 4.00000 3.00000 25.0% 6199 57s 17 1 cutoff 4 4.00000 3.00000 25.0% 6357 60s Cutting planes: Clique: 23 Explored 19 nodes (144009 simplex iterations) in 64.23 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%