Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:19:39 2012 Optimize a model with 593 rows, 532 columns and 2012 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 593 rows, 513 columns, 1993 nonzeros Variable types: 0 continuous, 513 integer (512 binary) Found heuristic solution: objective 112.0000000 Root relaxation: objective 0.000000e+00, 301 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 0 214 112.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s 0 0 0.44860 0 215 87.00000 0.44860 99.5% - 0s H 0 0 70.0000000 0.44860 99.4% - 0s 0 0 1.00400 0 216 70.00000 1.00400 98.6% - 0s H 0 0 51.0000000 1.00400 98.0% - 0s 0 0 1.07202 0 217 51.00000 1.07202 97.9% - 0s H 0 0 50.0000000 1.07202 97.9% - 0s 0 0 1.08802 0 219 50.00000 1.08802 97.8% - 0s 0 0 1.08802 0 219 50.00000 1.08802 97.8% - 0s 0 2 1.08911 0 219 50.00000 1.08911 97.8% - 0s H 27 27 49.0000000 1.14943 97.7% 61.1 0s * 66 46 42 25.0000000 1.14943 95.4% 36.1 0s H 264 151 23.0000000 1.46080 93.6% 45.1 0s 2553 718 17.77966 22 209 23.00000 12.70455 44.8% 31.1 5s 5975 1375 cutoff 22 23.00000 15.27273 33.6% 27.1 10s 9388 1643 cutoff 23 23.00000 16.57377 27.9% 26.4 15s 12660 1550 19.38333 22 215 23.00000 17.34066 24.6% 26.8 20s 16323 1080 cutoff 22 23.00000 18.15026 21.1% 27.2 25s Explored 19662 nodes (537298 simplex iterations) in 29.36 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%