Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:57:24 2012 Optimize a model with 567 rows, 516 columns and 1931 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 567 rows, 501 columns, 1916 nonzeros Variable types: 0 continuous, 501 integer (500 binary) Found heuristic solution: objective 103.0000000 Root relaxation: objective 0.000000e+00, 284 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 0 209 103.00000 0.00000 100% - 0s H 0 0 94.0000000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s 0 0 0.40648 0 211 84.00000 0.40648 100% - 0s H 0 0 74.0000000 0.40648 99.5% - 0s 0 0 0.77237 0 214 74.00000 0.77237 99.0% - 0s H 0 0 57.0000000 0.77237 98.6% - 0s 0 0 0.82829 0 214 57.00000 0.82829 98.5% - 0s 0 0 0.82869 0 216 57.00000 0.82869 98.5% - 0s 0 0 0.82869 0 216 57.00000 0.82869 98.5% - 0s H 0 0 56.0000000 0.82869 98.5% - 0s 0 2 0.82943 0 216 56.00000 0.82943 98.5% - 0s H 27 27 47.0000000 1.00000 97.9% 42.6 0s * 46 44 29 25.0000000 1.00000 96.0% 35.7 0s H 115 67 23.0000000 1.00000 95.7% 27.0 0s * 216 108 31 21.0000000 1.00000 95.2% 30.9 0s * 323 159 18 20.0000000 1.00000 95.0% 37.0 0s 2969 759 cutoff 29 20.00000 12.45977 37.7% 25.3 5s 6785 1148 18.42286 27 208 20.00000 14.70769 26.5% 20.8 10s 10783 1278 cutoff 30 20.00000 15.74026 21.3% 19.3 15s 14576 523 infeasible 25 20.00000 17.18898 14.1% 19.8 20s Explored 15642 nodes (304885 simplex iterations) in 21.04 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%