Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:17 2012 Optimize a model with 1440 rows, 76 columns and 2880 nonzeros Presolve removed 1011 rows and 0 columns Presolve time: 0.03s Presolved: 429 rows, 76 columns, 2701 nonzeros Variable types: 0 continuous, 76 integer (76 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.184412e+01, 253 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.84412 0 68 7.00000 11.84412 69.2% - 0s H 0 0 8.0000000 11.84412 48.1% - 0s 0 0 11.51801 0 72 8.00000 11.51801 44.0% - 0s 0 0 11.40024 0 74 8.00000 11.40024 42.5% - 0s 0 0 11.36893 0 74 8.00000 11.36893 42.1% - 0s 0 0 11.35921 0 75 8.00000 11.35921 42.0% - 0s 0 0 11.34553 0 74 8.00000 11.34553 41.8% - 0s 0 0 11.34185 0 74 8.00000 11.34185 41.8% - 0s 0 0 11.33160 0 73 8.00000 11.33160 41.6% - 0s 0 0 11.33037 0 73 8.00000 11.33037 41.6% - 0s 0 0 11.32711 0 73 8.00000 11.32711 41.6% - 0s 0 0 11.32384 0 72 8.00000 11.32384 41.5% - 0s 0 0 11.32275 0 73 8.00000 11.32275 41.5% - 0s 0 0 11.31832 0 75 8.00000 11.31832 41.5% - 0s 0 0 11.31524 0 74 8.00000 11.31524 41.4% - 0s 0 0 11.31144 0 75 8.00000 11.31144 41.4% - 0s 0 0 11.30639 0 74 8.00000 11.30639 41.3% - 0s 0 0 11.30306 0 74 8.00000 11.30306 41.3% - 0s 0 0 11.30290 0 74 8.00000 11.30290 41.3% - 0s 0 2 11.30218 0 74 8.00000 11.30218 41.3% - 0s Cutting planes: Clique: 46 Zero half: 5 Explored 64 nodes (3839 simplex iterations) in 0.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%