Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:44:27 2012 Optimize a model with 567 rows, 522 columns and 1937 nonzeros Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 567 rows, 494 columns, 1909 nonzeros Variable types: 0 continuous, 494 integer (493 binary) Found heuristic solution: objective 110.0000000 Root relaxation: objective 0.000000e+00, 280 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 0 205 110.00000 0.00000 100% - 0s H 0 0 91.0000000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s 0 0 0.25932 0 207 74.00000 0.25932 100% - 0s H 0 0 72.0000000 0.25932 100% - 0s 0 0 0.74154 0 209 72.00000 0.74154 99.0% - 0s H 0 0 64.0000000 0.74154 98.8% - 0s 0 0 0.74196 0 211 64.00000 0.74196 98.8% - 0s 0 0 0.74196 0 211 64.00000 0.74196 98.8% - 0s H 0 0 59.0000000 0.74196 98.7% - 0s 0 2 0.80886 0 211 59.00000 0.80886 98.6% - 0s H 27 27 56.0000000 1.00000 98.2% 39.9 0s H 54 52 26.0000000 1.00000 96.2% 32.2 0s H 135 97 25.0000000 3.21354 87.1% 35.6 0s * 268 177 23 24.0000000 5.94068 75.2% 33.8 0s 3238 1315 19.97561 20 198 24.00000 11.77457 50.9% 25.7 5s * 4856 1800 38 23.0000000 13.00000 43.5% 25.0 7s H 6615 1936 22.0000000 14.18519 35.5% 24.8 9s 6920 1962 15.96610 17 204 22.00000 14.41284 34.5% 24.7 10s 10640 2057 18.61446 19 196 22.00000 16.06154 27.0% 25.3 15s 14968 1725 20.67456 22 207 22.00000 17.68657 19.6% 24.8 20s 19670 431 20.64634 20 198 22.00000 20.00000 9.09% 23.6 25s Explored 20190 nodes (471373 simplex iterations) in 25.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%