Build (method = -2) #dp: 2909 Step-3' Graph: 143 vertices and 420 arcs (0.02s) Step-4' Graph: 17 vertices and 168 arcs (0.02s) #V4/#V3 = 0.12 #A4/#A3 = 0.40 Ready! (0.02s) Optimize a model with 60 rows, 169 columns and 479 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 58 rows, 167 columns, 475 nonzeros Variable types: 0 continuous, 167 integer (45 binary) Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 80.0000000 Optimize a model with 58 rows, 167 columns and 475 nonzeros Presolved: 58 rows, 167 columns, 475 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.800e+02 Factor NZ : 6.440e+02 Factor Ops : 1.196e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.51084119e+02 -2.76471171e+02 5.25e+01 3.34e-02 3.34e+00 0s 1 5.88930253e+01 -1.04613132e+02 8.42e-13 5.55e-16 4.67e-01 0s 2 3.66458849e+01 2.47062636e+01 8.88e-14 2.50e-16 3.31e-02 0s 3 3.33873499e+01 3.32198169e+01 9.59e-14 2.63e-16 4.63e-04 0s 4 3.33333879e+01 3.33332204e+01 4.15e-14 2.22e-16 4.63e-07 0s 5 3.33333334e+01 3.33333332e+01 1.25e-14 2.48e-16 4.63e-10 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333334e+01 Root relaxation: objective 3.333333e+01, 123 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 80.00000 33.33333 58.3% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (151 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: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 34 Solution: 4 x [35, 37, 43] 1 x [5, 33, 43] 4 x [15, 30, 42] 1 x [9, 36, 41] 1 x [1, 11, 41] 1 x [4, 26, 40] 1 x [16, 31, 39] 3 x [10, 32, 38] 1 x [4, 23, 35] 1 x [25, 34, 34] 1 x [33] 1 x [1, 13, 31] 2 x [19, 28, 29] 2 x [2, 5, 27] 2 x [14, 19, 24] 1 x [4, 18, 22] 3 x [6, 7, 21] 1 x [4, 12, 20] 1 x [1, 8, 19] 2 x [3, 7, 17]