Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:24:16 2012 Optimize a model with 537 rows, 484 columns and 1824 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 537 rows, 466 columns, 1806 nonzeros Variable types: 0 continuous, 466 integer (465 binary) Found heuristic solution: objective 97.0000000 Root relaxation: objective 0.000000e+00, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 191 97.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s 0 0 0.47141 0 192 77.00000 0.47141 99.4% - 0s H 0 0 75.0000000 0.47141 99.4% - 0s 0 0 1.00000 0 196 75.00000 1.00000 98.7% - 0s 0 0 1.00000 0 195 75.00000 1.00000 98.7% - 0s H 0 0 65.0000000 1.00000 98.5% - 0s 0 0 1.00000 0 200 65.00000 1.00000 98.5% - 0s 0 0 1.00000 0 193 65.00000 1.00000 98.5% - 0s H 0 0 62.0000000 1.00000 98.4% - 0s H 0 0 61.0000000 1.00000 98.4% - 0s H 0 0 56.0000000 1.00000 98.2% - 0s 0 2 1.00000 0 191 56.00000 1.00000 98.2% - 0s H 27 27 42.0000000 2.28205 94.6% 44.0 0s H 54 53 25.0000000 2.28205 90.9% 30.4 0s * 120 82 17 24.0000000 4.42541 81.6% 29.3 0s 3119 1232 cutoff 29 24.00000 13.96000 41.8% 23.0 5s 6839 2245 22.15094 21 198 24.00000 16.49693 31.3% 20.3 10s * 8032 2300 25 23.0000000 16.99363 26.1% 20.0 11s 10643 2389 cutoff 21 23.00000 17.96552 21.9% 20.1 15s 14783 2182 19.79592 22 186 23.00000 19.07547 17.1% 19.7 20s 19391 1191 21.86111 23 183 23.00000 20.41176 11.3% 19.0 25s Explored 21455 nodes (397714 simplex iterations) in 27.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%