Gurobi 5.0.1 (linux64) logging started Sun Dec 9 10:42:52 2012 Optimize a model with 3000 rows, 2970 columns and 11327 nonzeros Presolve removed 147 rows and 27 columns Presolve time: 0.02s Presolved: 2853 rows, 2943 columns, 11044 nonzeros Variable types: 2767 continuous, 176 integer (176 binary) Root relaxation: objective 5.936684e+04, 341 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59366.8397 0 31 - 59366.8397 - - 0s H 0 0 64640.000000 59366.8397 8.16% - 0s 0 0 59611.5826 0 49 64640.0000 59611.5826 7.78% - 0s 0 0 59651.9161 0 57 64640.0000 59651.9161 7.72% - 0s 0 0 59676.0004 0 52 64640.0000 59676.0004 7.68% - 0s 0 0 59704.4628 0 55 64640.0000 59704.4628 7.64% - 0s 0 0 59709.4618 0 49 64640.0000 59709.4618 7.63% - 0s 0 0 59711.6998 0 61 64640.0000 59711.6998 7.62% - 0s 0 0 59712.6264 0 63 64640.0000 59712.6264 7.62% - 0s 0 0 59715.2272 0 58 64640.0000 59715.2272 7.62% - 0s 0 0 59716.5891 0 61 64640.0000 59716.5891 7.62% - 0s 0 0 59717.6963 0 63 64640.0000 59717.6963 7.61% - 0s 0 0 59719.7909 0 67 64640.0000 59719.7909 7.61% - 0s 0 0 59723.5128 0 69 64640.0000 59723.5128 7.61% - 0s 0 0 59723.5673 0 70 64640.0000 59723.5673 7.61% - 0s H 0 0 64084.000000 59723.5673 6.80% - 0s H 0 0 63082.000000 59723.5673 5.32% - 0s H 0 0 61657.000000 59723.5673 3.14% - 0s 0 2 59750.9193 0 70 61657.0000 59750.9193 3.09% - 0s H 27 27 61195.000000 59965.5732 2.01% 14.0 0s H 216 150 61118.000000 60058.3367 1.73% 11.9 0s * 246 144 47 60941.000000 60058.3367 1.45% 11.5 0s H 970 366 60913.000000 60266.1757 1.06% 14.4 3s H 1762 523 60906.000000 60407.3657 0.82% 13.4 4s 1845 563 60883.8723 46 13 60906.0000 60411.2430 0.81% 13.3 5s 5539 1510 60904.9076 35 30 60906.0000 60651.8397 0.42% 11.4 10s 9935 768 cutoff 32 60906.0000 60820.8023 0.14% 10.3 15s Cutting planes: Gomory: 11 Flow cover: 27 Explored 11037 nodes (108611 simplex iterations) in 15.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.090600000000e+04, best bound 6.090037359844e+04, gap 0.0092%