Build (method = -2) #dp: 2258 Step-3' Graph: 78 vertices and 224 arcs (0.01s) Step-4' Graph: 6 vertices and 80 arcs (0.01s) #V4/#V3 = 0.08 #A4/#A3 = 0.36 Ready! (0.01s) Optimize a model with 25 rows, 81 columns and 238 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 23 rows, 79 columns, 234 nonzeros Variable types: 0 continuous, 79 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1829.0000000 Optimize a model with 23 rows, 79 columns and 234 nonzeros Presolved: 23 rows, 79 columns, 234 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.100e+01 Factor NZ : 2.760e+02 Factor Ops : 4.324e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.69690585e+03 -9.16290872e+03 5.76e+02 0.00e+00 2.23e+02 0s 1 1.46667635e+03 -3.68045677e+03 2.05e+01 4.44e-16 3.33e+01 0s 2 8.23059916e+02 8.97849815e+01 6.22e-02 4.44e-16 4.19e+00 0s 3 5.09475455e+02 4.30480108e+02 7.00e-04 2.24e-16 4.46e-01 0s 4 5.00179730e+02 4.99216360e+02 1.86e-13 2.22e-16 5.44e-03 0s 5 5.00000083e+02 4.99999905e+02 1.72e-13 2.19e-16 1.01e-06 0s 6 5.00000000e+02 5.00000000e+02 3.83e-13 3.33e-16 1.01e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+02 Root relaxation: objective 5.000000e+02, 69 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 500.0000000 500.00000 0.0% - 0s Explored 0 nodes (69 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+02, best bound 5.000000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 500 Solution: 30 x [8, 11, 11, 19] 141 x [10, 12, 13, 19] 1 x [1, 4, 8, 16] 5 x [2, 4, 6, 11] 76 x [4, 8, 11, 14] 14 x [1, 3, 4, 8] 52 x [5, 10, 16, 17] 2 x [5, 6, 8, 16] 22 x [3, 6, 6, 11] 24 x [2, 9, 10, 15] 120 x [6, 7, 15, 18] 10 x [9, 10, 12, 18] 2 x [6, 6, 9, 10] 1 x [6, 8, 9, 12]