Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:36:40 2012 Optimize a model with 5193 rows, 145 columns and 10386 nonzeros Presolve removed 3768 rows and 0 columns Presolve time: 0.20s Presolved: 1425 rows, 145 columns, 10246 nonzeros Variable types: 0 continuous, 145 integer (145 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.845153e+01, 675 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18.45153 0 142 8.00000 18.45153 131% - 0s H 0 0 9.0000000 18.45153 105% - 0s 0 0 18.03955 0 144 9.00000 18.03955 100% - 0s 0 0 17.93165 0 145 9.00000 17.93165 99.2% - 0s 0 0 17.89238 0 145 9.00000 17.89238 98.8% - 0s 0 0 17.88388 0 145 9.00000 17.88388 98.7% - 1s 0 0 17.87740 0 145 9.00000 17.87740 98.6% - 1s 0 0 17.87733 0 145 9.00000 17.87733 98.6% - 1s 0 0 17.87668 0 145 9.00000 17.87668 98.6% - 1s 0 0 17.87568 0 145 9.00000 17.87568 98.6% - 1s 0 0 17.87415 0 145 9.00000 17.87415 98.6% - 2s 0 2 17.87383 0 145 9.00000 17.87383 98.6% - 2s 346 222 13.80340 10 65 9.00000 16.73250 85.9% 72.7 5s 608 369 14.18493 8 145 9.00000 15.31257 70.1% 68.5 10s 751 442 10.93113 83 69 9.00000 14.64844 62.8% 103 15s H 772 376 10.0000000 14.64844 46.5% 101 15s 1623 228 cutoff 42 10.00000 12.49263 24.9% 73.3 20s Cutting planes: Clique: 47 Explored 2010 nodes (130804 simplex iterations) in 23.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%