Build (method = -2) #dp: 2393 Step-3' Graph: 123 vertices and 360 arcs (0.02s) Step-4' Graph: 16 vertices and 146 arcs (0.02s) #V4/#V3 = 0.13 #A4/#A3 = 0.41 Ready! (0.02s) Optimize a model with 53 rows, 147 columns and 415 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 51 rows, 145 columns, 411 nonzeros Variable types: 0 continuous, 145 integer (18 binary) Found heuristic solution: objective 92.0000000 Optimize a model with 51 rows, 145 columns and 411 nonzeros Presolved: 51 rows, 145 columns, 411 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.580e+02 Factor NZ : 5.860e+02 Factor Ops : 1.083e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.75545468e+02 -2.83255865e+02 6.06e+01 4.02e-02 4.49e+00 0s 1 6.43287104e+01 -1.21988028e+02 3.02e-13 3.33e-16 5.99e-01 0s 2 4.08734278e+01 2.00267786e+01 2.16e-13 3.89e-16 6.53e-02 0s 3 3.34514646e+01 3.28655013e+01 4.40e-14 2.22e-16 1.83e-03 0s 4 3.33334548e+01 3.33328688e+01 9.62e-14 2.22e-16 1.83e-06 0s 5 3.33333333e+01 3.33333333e+01 2.71e-14 3.33e-16 1.83e-12 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 113 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 4 92.00000 33.33333 63.8% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (125 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 34 Solution: 2 x [2, 31, 37] 1 x [1, 11, 11] 2 x [6, 28, 37] 4 x [17, 24, 36] 1 x [7, 20, 36] 3 x [32, 34, 35] 1 x [14, 26, 33] 1 x [10, 29, 32] 1 x [8, 27, 30] 1 x [3, 9, 30] 1 x [3, 12, 29] 3 x [10, 19, 27] 1 x [3, 13, 26] 3 x [8, 15, 25] 1 x [6, 18, 23] 1 x [17, 22, 22] 2 x [4, 12, 21] 2 x [4, 16, 18] 1 x [14] 2 x [4, 5, 13]