Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:27:38 2012 Optimize a model with 315 rows, 232 columns and 1017 nonzeros Presolve time: 0.00s Presolved: 315 rows, 232 columns, 1017 nonzeros Variable types: 0 continuous, 232 integer (232 binary) Found heuristic solution: objective 69.0000000 Root relaxation: objective 0.000000e+00, 111 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 75 69.00000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s 0 0 0.64037 0 77 48.00000 0.64037 98.7% - 0s H 0 0 46.0000000 0.64037 98.6% - 0s 0 0 0.68800 0 77 46.00000 0.68800 98.5% - 0s H 0 0 44.0000000 0.68800 98.4% - 0s 0 0 0.74370 0 78 44.00000 0.74370 98.3% - 0s 0 0 0.81537 0 83 44.00000 0.81537 98.1% - 0s 0 0 0.83373 0 98 44.00000 0.83373 98.1% - 0s 0 0 0.84122 0 81 44.00000 0.84122 98.1% - 0s 0 0 0.84513 0 86 44.00000 0.84513 98.1% - 0s 0 2 0.86041 0 86 44.00000 0.86041 98.0% - 0s H 27 27 31.0000000 3.83333 87.6% 25.4 0s * 240 136 16 30.0000000 10.50000 65.0% 22.2 0s H 384 189 29.0000000 13.20000 54.5% 20.3 0s * 1372 219 27 28.0000000 16.66667 40.5% 21.9 1s * 2407 173 21 27.0000000 20.44444 24.3% 22.0 1s H 2493 135 26.0000000 20.91176 19.6% 22.0 1s Explored 2765 nodes (60667 simplex iterations) in 2.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%