Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:24:47 2012 Optimize a model with 481 rows, 456 columns and 1656 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 481 rows, 434 columns, 1634 nonzeros Variable types: 0 continuous, 434 integer (433 binary) Found heuristic solution: objective 92.0000000 Root relaxation: objective 0.000000e+00, 269 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 0 185 92.00000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s 0 0 0.29036 0 187 60.00000 0.29036 100% - 0s H 0 0 57.0000000 0.29036 99.5% - 0s 0 0 0.93309 0 190 57.00000 0.93309 98.4% - 0s H 0 0 52.0000000 0.93309 98.2% - 0s H 0 0 47.0000000 0.93309 98.0% - 0s 0 0 0.93415 0 192 47.00000 0.93415 98.0% - 0s 0 0 0.93415 0 192 47.00000 0.93415 98.0% - 0s H 0 0 38.0000000 0.93415 97.5% - 0s H 0 0 35.0000000 0.93415 97.3% - 0s 0 2 0.93553 0 192 35.00000 0.93553 97.3% - 0s * 67 47 37 20.0000000 1.00000 95.0% 30.0 0s * 108 74 23 19.0000000 1.04321 94.5% 28.4 0s * 115 65 23 18.0000000 1.04321 94.2% 27.2 0s * 225 127 21 17.0000000 2.88000 83.1% 29.8 0s * 422 180 13 16.0000000 5.69880 64.4% 27.7 0s * 1205 213 27 15.0000000 8.26316 44.9% 26.6 1s Explored 2292 nodes (58304 simplex iterations) in 3.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%