Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:34:13 2012 Optimize a model with 8678 rows, 1122 columns and 26992 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8709 rows, 1120 columns, 31250 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.425287e+00, 7007 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.42529 0 980 33.00000 3.42529 89.6% - 1s 0 0 6.00000 0 122 33.00000 6.00000 81.8% - 2s H 0 0 19.0000000 6.00000 68.4% - 2s 0 0 6.00000 0 150 19.00000 6.00000 68.4% - 2s H 0 0 13.0000000 6.00000 53.8% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 129 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 109 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 162 8.00000 6.00000 25.0% - 3s 0 0 6.00000 0 142 8.00000 6.00000 25.0% - 4s 0 0 6.00000 0 161 8.00000 6.00000 25.0% - 4s 0 0 6.00000 0 146 8.00000 6.00000 25.0% - 4s 0 0 6.01740 0 194 8.00000 6.01740 24.8% - 4s 0 0 6.02500 0 213 8.00000 6.02500 24.7% - 4s 0 0 6.02751 0 232 8.00000 6.02751 24.7% - 4s 0 0 6.03575 0 204 8.00000 6.03575 24.6% - 4s 0 0 6.04410 0 226 8.00000 6.04410 24.4% - 4s 0 0 6.06293 0 206 8.00000 6.06293 24.2% - 4s 0 0 6.09571 0 225 8.00000 6.09571 23.8% - 4s 0 0 6.10194 0 229 8.00000 6.10194 23.7% - 4s 0 0 6.10657 0 205 8.00000 6.10657 23.7% - 4s 0 0 6.11379 0 231 8.00000 6.11379 23.6% - 4s 0 0 6.12150 0 209 8.00000 6.12150 23.5% - 4s 0 0 6.12353 0 206 8.00000 6.12353 23.5% - 4s 0 0 6.12493 0 235 8.00000 6.12493 23.4% - 4s 0 0 6.12520 0 236 8.00000 6.12520 23.4% - 4s 0 0 6.12626 0 208 8.00000 6.12626 23.4% - 4s 0 0 6.12646 0 210 8.00000 6.12646 23.4% - 4s 0 0 6.12656 0 208 8.00000 6.12656 23.4% - 5s 0 0 6.12662 0 209 8.00000 6.12662 23.4% - 5s 0 0 6.12662 0 209 8.00000 6.12662 23.4% - 5s 0 2 6.12733 0 209 8.00000 6.12733 23.4% - 5s 608 33 7.00000 15 18 8.00000 7.00000 12.5% 57.7 10s 1336 4 7.00000 35 38 8.00000 7.00000 12.5% 77.5 15s Cutting planes: Gomory: 1 Clique: 2 Explored 1894 nodes (181936 simplex iterations) in 17.11 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%