Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:41:03 2012 Optimize a model with 547 rows, 493 columns and 1858 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 547 rows, 474 columns, 1839 nonzeros Variable types: 0 continuous, 474 integer (473 binary) Found heuristic solution: objective 102.0000000 Root relaxation: objective 0.000000e+00, 262 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 0 193 102.00000 0.00000 100% - 0s H 0 0 93.0000000 0.00000 100% - 0s H 0 0 91.0000000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.41367 0 195 85.00000 0.41367 100% - 0s H 0 0 79.0000000 0.41367 99.5% - 0s 0 0 0.83141 0 197 79.00000 0.83141 98.9% - 0s H 0 0 71.0000000 0.83141 98.8% - 0s H 0 0 63.0000000 0.83141 98.7% - 0s 0 0 0.83141 0 197 63.00000 0.83141 98.7% - 0s H 0 0 53.0000000 0.83141 98.4% - 0s 0 2 0.85460 0 197 53.00000 0.85460 98.4% - 0s H 27 27 32.0000000 1.00000 96.9% 43.6 0s H 54 54 23.0000000 1.00000 95.7% 31.3 0s * 61 48 33 22.0000000 1.00000 95.5% 29.6 0s H 275 159 20.0000000 3.96190 80.2% 32.5 0s 3104 1281 17.68831 23 182 20.00000 9.06383 54.7% 23.8 5s 6243 2261 18.02312 24 207 20.00000 10.56667 47.2% 23.8 10s 9533 2933 18.79769 20 199 20.00000 11.48649 42.6% 24.3 15s 13017 3379 16.52147 21 191 20.00000 12.37324 38.1% 24.3 20s 16796 3646 15.35583 20 184 20.00000 13.08333 34.6% 24.4 25s 20693 3652 18.00000 22 195 20.00000 13.75000 31.2% 24.2 30s 24575 3528 cutoff 23 20.00000 14.22222 28.9% 24.4 35s 28553 3141 16.89677 21 180 20.00000 14.80952 26.0% 24.3 40s 32313 2720 cutoff 25 20.00000 15.22500 23.9% 24.5 45s 36017 2065 cutoff 26 20.00000 15.83333 20.8% 24.6 50s 39867 1110 cutoff 25 20.00000 17.00000 15.0% 24.6 55s Explored 41887 nodes (1018294 simplex iterations) in 56.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%