Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:51:03 2012 Optimize a model with 15040 rows, 6480 columns and 51280 nonzeros Presolve removed 2 rows and 160 columns Presolve time: 0.12s Presolved: 15038 rows, 6320 columns, 51221 nonzeros Variable types: 0 continuous, 6320 integer (6320 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 2.000000e+00, 6801 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 156 45.00000 2.00000 95.6% - 1s H 0 0 15.0000000 2.00000 86.7% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s 0 0 2.00000 0 156 4.00000 2.00000 50.0% - 3s 0 0 2.00000 0 156 4.00000 2.00000 50.0% - 13s 0 0 2.00000 0 156 4.00000 2.00000 50.0% - 24s 0 0 2.00000 0 156 4.00000 2.00000 50.0% - 34s 0 0 2.00000 0 156 4.00000 2.00000 50.0% - 45s 0 0 2.00000 0 156 4.00000 2.00000 50.0% - 52s 0 2 2.00000 0 156 4.00000 2.00000 50.0% - 78s 1 3 2.50000 1 1100 4.00000 2.00000 50.0% 61172 93s 2 4 2.50000 1 772 4.00000 2.50000 37.5% 45151 105s 19 13 2.50000 2 503 4.00000 2.50000 37.5% 5411 110s 53 23 2.50000 3 282 4.00000 2.50000 37.5% 2342 116s 55 23 2.50000 4 219 4.00000 2.50000 37.5% 2348 121s 82 28 3.00000 6 124 4.00000 2.50000 37.5% 1736 125s 165 39 3.00000 7 124 4.00000 3.00000 25.0% 1031 133s 193 37 3.00000 4 140 4.00000 3.00000 25.0% 910 142s 556 12 3.00000 4 162 4.00000 3.00000 25.0% 408 145s Cutting planes: Clique: 73 Explored 697 nodes (397414 simplex iterations) in 146.27 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%