Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:29:36 2012 Optimize a model with 20952 rows, 5256 columns and 67824 nonzeros Presolve time: 0.12s Presolved: 20952 rows, 5256 columns, 68006 nonzeros Variable types: 0 continuous, 5256 integer (5256 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 2.000000e+00, 5192 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 50.00000 2.00000 96.0% - 1s H 0 0 19.0000000 2.00000 89.5% - 1s H 0 0 6.0000000 2.00000 66.7% - 2s 0 0 2.00000 0 144 6.00000 2.00000 66.7% - 8s 0 0 2.00000 0 144 6.00000 2.00000 66.7% - 19s 0 0 2.00000 0 144 6.00000 2.00000 66.7% - 35s H 0 0 5.0000000 2.00000 60.0% - 35s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 44s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 55s 0 0 2.00000 0 144 5.00000 2.00000 60.0% - 65s 0 2 2.00000 0 144 5.00000 2.00000 60.0% - 95s 1 3 3.00000 1 877 5.00000 2.00000 60.0% 46315 108s 2 4 3.00000 1 677 5.00000 3.00000 40.0% 37108 122s 6 4 3.00000 3 138 5.00000 3.00000 40.0% 13630 125s 10 8 3.33333 7 448 5.00000 3.00000 40.0% 10474 133s 11 9 3.50000 7 131 5.00000 3.00000 40.0% 11443 140s 53 20 3.33333 5 407 5.00000 3.00000 40.0% 3193 152s 71 24 4.00000 6 426 5.00000 3.00000 40.0% 2638 157s 77 24 cutoff 10 5.00000 3.00000 40.0% 2624 160s 82 27 3.20000 6 175 5.00000 3.00000 40.0% 2646 170s 103 37 3.00000 2 461 5.00000 3.00000 40.0% 2314 175s 111 43 3.20000 8 178 5.00000 3.00000 40.0% 2299 181s 114 46 3.50000 9 135 5.00000 3.00000 40.0% 2383 185s 129 47 3.33333 5 202 5.00000 3.00000 40.0% 2301 191s 154 55 3.50000 7 152 5.00000 3.00000 40.0% 2018 195s 163 60 4.00000 14 124 5.00000 3.00000 40.0% 1929 208s 172 59 4.00000 8 118 5.00000 3.20000 36.0% 1870 210s 181 60 cutoff 13 5.00000 3.20000 36.0% 1912 215s 191 60 cutoff 15 5.00000 3.20000 36.0% 1935 220s * 228 1 19 4.0000000 4.00000 0.0% 1681 223s Cutting planes: Gomory: 2 Clique: 207 Explored 229 nodes (518232 simplex iterations) in 223.22 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%