Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:36:30 2012 Optimize a model with 13695 rows, 4160 columns and 44926 nonzeros Presolve removed 3 rows and 66 columns Presolve time: 0.41s Presolved: 13692 rows, 4094 columns, 44434 nonzeros Variable types: 0 continuous, 4094 integer (4094 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 3215 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 64.00000 2.00000 96.9% - 0s H 0 0 62.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 364 5.00000 2.66667 46.7% - 2s 0 0 2.68132 0 3780 5.00000 2.68132 46.4% - 2s 0 0 2.68132 0 3761 5.00000 2.68132 46.4% - 5s 0 0 2.68132 0 3775 5.00000 2.68132 46.4% - 5s 0 0 2.68132 0 3521 5.00000 2.68132 46.4% - 10s 0 0 2.68132 0 3435 5.00000 2.68132 46.4% - 13s 0 0 2.68132 0 3379 5.00000 2.68132 46.4% - 16s 0 0 2.68132 0 3278 5.00000 2.68132 46.4% - 18s 0 0 2.68132 0 3297 5.00000 2.68132 46.4% - 20s 0 0 2.68132 0 3305 5.00000 2.68132 46.4% - 23s 0 0 2.68132 0 3298 5.00000 2.68132 46.4% - 26s 0 0 2.68132 0 3304 5.00000 2.68132 46.4% - 28s 0 0 2.68132 0 3293 5.00000 2.68132 46.4% - 30s 0 2 3.00000 0 3282 5.00000 3.00000 40.0% - 42s 14 6 4.00000 4 140 5.00000 3.00000 40.0% 890 45s H 27 4 4.0000000 3.00000 25.0% 518 46s Cutting planes: Clique: 185 Zero half: 11 Explored 34 nodes (82711 simplex iterations) in 46.23 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%