Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:46:28 2012 Optimize a model with 13325 rows, 4290 columns and 44005 nonzeros Presolve time: 0.10s Presolved: 13325 rows, 4290 columns, 44191 nonzeros Variable types: 0 continuous, 4290 integer (4290 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 2.000000e+00, 4777 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 130 38.00000 2.00000 94.7% - 1s H 0 0 13.0000000 2.00000 84.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 14s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 28s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 34s 0 2 2.00000 0 130 5.00000 2.00000 60.0% - 64s 1 3 3.00000 1 714 5.00000 2.00000 60.0% 46375 77s 2 4 3.00000 1 469 5.00000 3.00000 40.0% 46572 98s 5 7 4.00000 4 208 5.00000 3.00000 40.0% 22173 104s 6 8 3.25000 4 295 5.00000 3.00000 40.0% 19836 106s * 23 8 18 4.0000000 3.00000 25.0% 5309 106s 37 4 cutoff 5 4.00000 3.00000 25.0% 3634 110s 43 4 3.00000 3 267 4.00000 3.00000 25.0% 3501 115s Cutting planes: Clique: 115 Explored 56 nodes (245830 simplex iterations) in 119.64 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%