Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:50:19 2012 Optimize a model with 607 rows, 542 columns and 2057 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 607 rows, 520 columns, 2035 nonzeros Variable types: 0 continuous, 520 integer (519 binary) Found heuristic solution: objective 114.0000000 Root relaxation: objective 0.000000e+00, 313 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 0 216 114.00000 0.00000 100% - 0s H 0 0 99.0000000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.43095 0 219 85.00000 0.43095 99.5% - 0s H 0 0 83.0000000 0.43095 99.5% - 0s 0 0 0.71660 0 219 83.00000 0.71660 99.1% - 0s H 0 0 78.0000000 0.71660 99.1% - 0s 0 0 0.71867 0 220 78.00000 0.71867 99.1% - 0s 0 0 0.71867 0 220 78.00000 0.71867 99.1% - 0s H 0 0 73.0000000 0.71867 99.0% - 0s H 0 0 67.0000000 0.71867 98.9% - 0s H 0 0 63.0000000 0.71867 98.9% - 0s H 0 0 61.0000000 0.71867 98.8% - 0s 0 2 0.73385 0 220 61.00000 0.73385 98.8% - 0s H 54 54 47.0000000 1.00000 97.9% 34.9 0s H 81 60 27.0000000 1.00000 96.3% 28.6 0s * 349 191 17 26.0000000 5.00000 80.8% 36.6 0s * 2209 834 36 25.0000000 11.96026 52.2% 29.4 3s 2855 1034 23.12778 26 221 25.00000 13.09091 47.6% 28.6 5s 5877 1610 23.67742 25 222 25.00000 15.81818 36.7% 28.7 10s 8928 1860 cutoff 25 25.00000 17.32847 30.7% 28.7 15s 12636 1929 cutoff 27 25.00000 18.80000 24.8% 27.9 20s 16342 1642 22.87283 27 214 25.00000 19.85714 20.6% 27.4 25s 20415 981 cutoff 27 25.00000 21.21978 15.1% 27.0 30s Explored 22988 nodes (605590 simplex iterations) in 32.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%