Build (method = -2) #dp: 2184 Step-3' Graph: 102 vertices and 312 arcs (0.01s) Step-4' Graph: 17 vertices and 142 arcs (0.01s) #V4/#V3 = 0.17 #A4/#A3 = 0.46 Ready! (0.01s) Optimize a model with 82 rows, 143 columns and 399 nonzeros Presolve removed 45 rows and 61 columns Presolve time: 0.00s Presolved: 37 rows, 82 columns, 216 nonzeros Variable types: 0 continuous, 82 integer (9 binary) Found heuristic solution: objective 72.0000000 Optimize a model with 37 rows, 82 columns and 216 nonzeros Presolved: 37 rows, 82 columns, 216 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.100e+01 Factor NZ : 4.030e+02 Factor Ops : 5.575e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.84033490e+02 -7.73476560e+02 6.43e+01 4.44e-16 3.01e+01 0s 1 2.02822379e+02 -3.12690813e+02 6.56e+00 8.88e-16 4.44e+00 0s 2 7.22445986e+01 -3.14986010e+01 8.56e-02 3.55e-15 5.67e-01 0s 3 5.49285612e+01 1.94726887e+01 1.83e-03 9.08e-16 1.91e-01 0s 4 5.02484086e+01 4.80945210e+01 5.02e-14 6.66e-16 1.16e-02 0s 5 5.00006300e+01 4.99979641e+01 1.09e-14 7.77e-16 1.43e-05 0s 6 5.00000000e+01 5.00000000e+01 1.39e-14 5.66e-16 1.49e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 38 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (38 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+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 50 Solution: 1 x [31, 65] 1 x [29, 64] 1 x [25, 63] 1 x [20, 62] 2 x [10, 61] 3 x [26, 60] 2 x [6, 59] 1 x [18, 58] 1 x [16, 57] 3 x [8, 56] 1 x [41, 55] 1 x [12, 55] 1 x [46, 54] 1 x [11, 54] 1 x [33, 53] 1 x [7, 53] 1 x [48, 52] 1 x [2, 51] 1 x [1, 50] 1 x [3, 49] 1 x [9, 47] 1 x [13, 45] 1 x [14, 44] 2 x [42, 43] 1 x [19, 40] 2 x [5, 39] 3 x [32, 38] 2 x [17, 37] 2 x [34, 36] 1 x [28, 35] 2 x [24, 30] 2 x [21, 27] 2 x [15, 23] 2 x [4, 22]