Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:50:50 2012 Optimize a model with 18426 rows, 5550 columns and 60532 nonzeros Presolve time: 0.14s Presolved: 18426 rows, 5550 columns, 60622 nonzeros Variable types: 0 continuous, 5550 integer (5550 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 2.000000e+00, 5941 iterations, 0.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 48.00000 2.00000 95.8% - 2s H 0 0 14.0000000 2.00000 85.7% - 2s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 16s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 23s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 34s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 45s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 55s 0 2 2.00000 0 148 5.00000 2.00000 60.0% - 102s 1 3 3.00000 1 796 5.00000 2.00000 60.0% 47055 114s 2 4 3.00000 1 731 5.00000 3.00000 40.0% 32644 122s 7 3 3.00000 3 142 5.00000 3.00000 40.0% 9856 125s 11 7 3.14286 6 202 5.00000 3.00000 40.0% 8166 131s 12 8 3.20000 6 231 5.00000 3.00000 40.0% 9078 136s * 34 6 24 4.0000000 3.00000 25.0% 3391 137s 43 3 3.00000 3 142 4.00000 3.00000 25.0% 2897 140s 48 0 cutoff 5 4.00000 4.00000 0.0% 3206 146s Cutting planes: Clique: 112 Explored 49 nodes (291676 simplex iterations) in 146.05 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%