Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:49:29 2012 Optimize a model with 579 rows, 521 columns and 1966 nonzeros Presolve removed 0 rows and 14 columns Presolve time: 0.00s Presolved: 579 rows, 507 columns, 1952 nonzeros Variable types: 0 continuous, 507 integer (506 binary) Found heuristic solution: objective 115.0000000 Root relaxation: objective 0.000000e+00, 278 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 0 209 115.00000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s 0 0 0.45577 0 210 75.00000 0.45577 99.4% - 0s H 0 0 72.0000000 0.45577 99.4% - 0s 0 0 1.05338 0 213 72.00000 1.05338 98.5% - 0s H 0 0 70.0000000 1.05338 98.5% - 0s 0 0 1.05373 0 215 70.00000 1.05373 98.5% - 0s 0 0 1.05373 0 215 70.00000 1.05373 98.5% - 0s H 0 0 68.0000000 1.05373 98.5% - 0s H 0 0 55.0000000 1.05373 98.1% - 0s H 0 0 47.0000000 1.05373 97.8% - 0s H 0 0 44.0000000 1.05373 97.6% - 0s 0 2 1.05419 0 215 44.00000 1.05419 97.6% - 0s * 50 44 28 25.0000000 1.93318 92.3% 31.7 0s H 54 39 24.0000000 1.93318 91.9% 31.1 0s H 135 93 23.0000000 3.75149 83.7% 39.3 0s H 162 107 22.0000000 3.75149 82.9% 38.2 0s * 835 310 28 20.0000000 10.00000 50.0% 35.5 1s 2991 681 18.76536 22 211 20.00000 12.66667 36.7% 28.4 5s 6613 601 18.61538 23 202 20.00000 15.39130 23.0% 26.2 10s Explored 8903 nodes (222687 simplex iterations) in 12.65 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%