Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:10:37 2012 Optimize a model with 14169 rows, 4290 columns and 46473 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.42s Presolved: 14232 rows, 4288 columns, 50262 nonzeros Variable types: 0 continuous, 4288 integer (4288 binary) Found heuristic solution: objective 65.0000000 Root relaxation: objective 2.000000e+00, 3205 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 130 65.00000 2.00000 96.9% - 0s H 0 0 56.0000000 2.00000 96.4% - 0s H 0 0 7.0000000 2.00000 71.4% - 0s 0 0 2.66667 0 711 7.00000 2.66667 61.9% - 2s H 0 0 6.0000000 2.66667 55.6% - 2s 0 0 2.66667 0 2616 6.00000 2.66667 55.6% - 3s H 0 0 5.0000000 2.66667 46.7% - 3s 0 0 2.66667 0 183 5.00000 2.66667 46.7% - 7s 0 0 2.67021 0 3360 5.00000 2.67021 46.6% - 9s 0 0 2.67021 0 3398 5.00000 2.67021 46.6% - 10s 0 0 2.67021 0 3337 5.00000 2.67021 46.6% - 12s 0 0 2.67021 0 3302 5.00000 2.67021 46.6% - 13s 0 0 2.67021 0 3360 5.00000 2.67021 46.6% - 14s 0 0 2.67021 0 3331 5.00000 2.67021 46.6% - 15s 0 0 2.67021 0 3316 5.00000 2.67021 46.6% - 16s 0 0 2.67021 0 3335 5.00000 2.67021 46.6% - 18s 0 0 2.67021 0 3260 5.00000 2.67021 46.6% - 19s 0 0 2.67021 0 3332 5.00000 2.67021 46.6% - 20s 0 0 2.67021 0 3395 5.00000 2.67021 46.6% - 22s 0 0 2.67021 0 3395 5.00000 2.67021 46.6% - 23s 0 2 2.80000 0 3395 5.00000 2.80000 44.0% - 31s * 22 5 15 4.0000000 3.00000 25.0% 494 33s Cutting planes: Clique: 98 Zero half: 11 Explored 28 nodes (69779 simplex iterations) in 34.56 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%