Build (method = -2) #dp: 5931 Step-3' Graph: 128 vertices and 377 arcs (0.03s) Step-4' Graph: 8 vertices and 137 arcs (0.03s) #V4/#V3 = 0.06 #A4/#A3 = 0.36 Ready! (0.03s) Optimize a model with 51 rows, 138 columns and 402 nonzeros Presolve removed 6 rows and 6 columns Presolve time: 0.00s Presolved: 45 rows, 132 columns, 386 nonzeros Variable types: 0 continuous, 132 integer (104 binary) Found heuristic solution: objective 40.0000000 Optimize a model with 45 rows, 132 columns and 386 nonzeros Presolved: 45 rows, 132 columns, 386 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.320e+02 Factor NZ : 5.830e+02 Factor Ops : 1.168e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.56201645e+02 -1.43483220e+02 7.37e+00 1.41e-02 1.67e+00 0s 1 3.44954170e+01 -2.08754619e+01 1.60e-13 1.67e-16 2.21e-01 0s 2 1.83298859e+01 1.33405677e+01 1.86e-13 6.21e-03 1.93e-02 0s 3 1.66723323e+01 1.66347782e+01 2.20e-14 1.80e-16 1.41e-04 0s 4 1.66666723e+01 1.66666345e+01 1.83e-14 2.22e-16 1.41e-07 0s 5 1.66666667e+01 1.66666667e+01 5.44e-15 2.22e-16 1.41e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 89 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.66667 0 4 40.00000 16.66667 58.3% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (119 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.01 seconds Total run time: 0.05 seconds Objective: 17 Solution: 1 x [3, 15, 17] 1 x [11, 13, 40] 1 x [10, 25, 39] 1 x [8, 21, 23] 1 x [6, 18, 32] 1 x [5, 5] 1 x [4, 30, 43] 1 x [2, 29, 39] 1 x [22, 26, 36] 1 x [1, 25, 31] 1 x [23, 25, 28] 1 x [19, 24, 27] 1 x [12, 16, 23] 1 x [21, 33, 37] 1 x [7, 20, 42] 1 x [14, 38, 41] 1 x [9, 34, 35]