Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:06:35 2012 Optimize a model with 15990 rows, 6806 columns and 54448 nonzeros Presolve removed 1 rows and 82 columns Presolve time: 0.13s Presolved: 15989 rows, 6724 columns, 54428 nonzeros Variable types: 0 continuous, 6724 integer (6724 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 5258 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 162 54.00000 2.00000 96.3% - 1s H 0 0 14.0000000 2.00000 85.7% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s 0 0 2.00000 0 162 4.00000 2.00000 50.0% - 6s 0 0 2.00000 0 162 4.00000 2.00000 50.0% - 18s 0 0 2.00000 0 162 4.00000 2.00000 50.0% - 27s 0 0 2.00000 0 162 4.00000 2.00000 50.0% - 37s 0 0 2.00000 0 162 4.00000 2.00000 50.0% - 47s 0 0 2.00000 0 162 4.00000 2.00000 50.0% - 58s 0 2 2.00000 0 162 4.00000 2.00000 50.0% - 88s 1 3 2.50000 1 998 4.00000 2.00000 50.0% 52150 102s 2 4 2.33333 1 1625 4.00000 2.33333 41.7% 43226 118s 18 12 2.40000 2 268 4.00000 2.40000 40.0% 5405 122s 53 25 2.50000 2 421 4.00000 2.50000 37.5% 2145 126s 71 28 2.50000 2 690 4.00000 2.50000 37.5% 1750 132s 88 35 2.66667 3 216 4.00000 2.50000 37.5% 1634 137s 110 38 2.50000 4 161 4.00000 2.50000 37.5% 1375 141s 137 33 3.00000 9 138 4.00000 3.00000 25.0% 1142 147s 617 11 3.00000 10 132 4.00000 3.00000 25.0% 349 150s Cutting planes: Clique: 95 Explored 756 nodes (376248 simplex iterations) in 151.21 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%