Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:36:55 2012 Optimize a model with 18130 rows, 5550 columns and 59644 nonzeros Presolve time: 0.14s Presolved: 18130 rows, 5550 columns, 59727 nonzeros Variable types: 0 continuous, 5550 integer (5550 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 2.000000e+00, 5498 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 53.00000 2.00000 96.2% - 2s H 0 0 16.0000000 2.00000 87.5% - 2s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 5s 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% - 29s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 42s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 50s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 59s H 0 0 4.0000000 2.00000 50.0% - 74s 0 2 2.00000 0 148 4.00000 2.00000 50.0% - 90s 1 3 3.00000 1 1271 4.00000 2.00000 50.0% 59767 107s 2 4 3.00000 1 827 4.00000 3.00000 25.0% 48054 122s 6 4 3.00000 3 132 4.00000 3.00000 25.0% 17248 125s 7 3 cutoff 4 4.00000 3.00000 25.0% 18343 134s 8 2 cutoff 4 4.00000 3.00000 25.0% 18768 141s 9 1 cutoff 3 4.00000 3.00000 25.0% 20297 153s 10 2 3.00000 2 545 4.00000 3.00000 25.0% 18552 155s 14 0 cutoff 4 4.00000 4.00000 0.0% 14432 160s Cutting planes: Clique: 148 Explored 15 nodes (334805 simplex iterations) in 160.32 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%