Build (method = -2) #dp: 16226 Step-3' Graph: 247 vertices and 734 arcs (0.10s) Step-4' Graph: 18 vertices and 276 arcs (0.10s) #V4/#V3 = 0.07 #A4/#A3 = 0.38 Ready! (0.10s) Optimize a model with 97 rows, 277 columns and 799 nonzeros Presolve removed 5 rows and 6 columns Presolve time: 0.00s Presolved: 92 rows, 271 columns, 784 nonzeros Variable types: 0 continuous, 271 integer (181 binary) Found heuristic solution: objective 38.0000000 Optimize a model with 92 rows, 271 columns and 784 nonzeros Presolved: 92 rows, 271 columns, 784 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.820e+02 Factor NZ : 7.810e+02 Factor Ops : 1.252e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.25909433e+02 -2.99419555e+02 1.73e+01 1.13e-02 1.48e+00 0s 1 6.29710661e+01 -5.59915476e+01 2.63e-13 2.78e-16 2.28e-01 0s 2 3.74699517e+01 2.71607459e+01 8.88e-14 2.50e-16 1.89e-02 0s 3 3.33481397e+01 3.32372750e+01 1.71e-13 2.22e-16 1.99e-04 0s 4 3.33333482e+01 3.33332373e+01 1.07e-12 2.22e-16 1.99e-07 0s 5 3.33333333e+01 3.33333333e+01 3.67e-13 1.75e-16 1.99e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 187 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 3 38.00000 33.33333 12.3% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (241 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: 0.10 seconds Gurobi run time: 0.01 seconds Total run time: 0.11 seconds Objective: 34 Solution: 1 x [43, 49, 68] 1 x [11, 55, 64] 1 x [7, 16, 55] 1 x [36, 45, 71] 1 x [50] 1 x [50, 53, 67] 1 x [37, 38, 48] 2 x [1, 8, 46] 1 x [29, 32, 41] 1 x [21, 23, 33] 1 x [6, 35, 42] 1 x [12, 13, 17] 1 x [5, 10, 15] 1 x [2, 60, 78] 1 x [4, 75, 77] 2 x [3, 56, 61] 2 x [9, 66, 79] 1 x [72, 73, 76] 1 x [69, 70, 74] 1 x [18, 19, 67] 1 x [62, 63, 65] 1 x [53, 58, 59] 1 x [47, 52, 57] 1 x [30, 44, 54] 1 x [28, 39, 51] 1 x [27, 31, 40] 1 x [24, 25, 34] 3 x [14, 26, 27] 1 x [20, 22, 27]