Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:14:47 2012 Optimize a model with 567 rows, 510 columns and 1925 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 567 rows, 494 columns, 1909 nonzeros Variable types: 0 continuous, 494 integer (493 binary) Found heuristic solution: objective 112.0000000 Root relaxation: objective 0.000000e+00, 283 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 0 204 112.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s 0 0 0.29908 0 206 81.00000 0.29908 100% - 0s H 0 0 71.0000000 0.29908 100% - 0s 0 0 0.75482 0 208 71.00000 0.75482 98.9% - 0s H 0 0 59.0000000 0.75482 98.7% - 0s H 0 0 51.0000000 0.75482 98.5% - 0s 0 0 0.75542 0 211 51.00000 0.75542 98.5% - 0s 0 0 0.75542 0 211 51.00000 0.75542 98.5% - 0s H 0 0 45.0000000 0.75542 98.3% - 0s H 0 0 44.0000000 0.75542 98.3% - 0s 0 2 0.76184 0 210 44.00000 0.76184 98.3% - 0s * 68 57 39 28.0000000 1.00000 96.4% 31.7 0s H 122 71 25.0000000 1.00000 96.0% 32.3 0s H 160 80 23.0000000 1.00000 95.7% 32.5 0s 2745 593 21.29677 21 194 23.00000 14.31250 37.8% 28.7 5s 6059 782 20.79070 19 210 23.00000 17.22517 25.1% 25.1 10s 9520 533 cutoff 23 23.00000 18.75342 18.5% 23.7 15s Explored 11728 nodes (280231 simplex iterations) in 17.97 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%