Build (method = -2) #dp: 963 Step-3' Graph: 38 vertices and 192 arcs (0.00s) Step-4' Graph: 8 vertices and 132 arcs (0.00s) #V4/#V3 = 0.21 #A4/#A3 = 0.69 Ready! (0.00s) Optimize a model with 48 rows, 133 columns and 389 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 46 rows, 131 columns, 385 nonzeros Variable types: 0 continuous, 131 integer (9 binary) Found heuristic solution: objective 248.0000000 Found heuristic solution: objective 241.0000000 Optimize a model with 46 rows, 131 columns and 385 nonzeros Presolved: 46 rows, 131 columns, 385 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.350e+02 Factor NZ : 5.870e+02 Factor Ops : 1.169e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.87728997e+02 -7.01551528e+02 7.07e+01 1.88e-02 1.34e+01 0s 1 1.78500610e+02 -3.11386754e+02 7.64e-01 3.33e-16 1.76e+00 0s 2 1.22065058e+02 -7.76943044e+01 8.19e-02 4.44e-16 6.83e-01 0s 3 8.78402223e+01 7.05077096e+01 9.30e-14 2.22e-16 5.80e-02 0s 4 8.40649292e+01 8.36095604e+01 9.22e-14 3.33e-16 1.52e-03 0s 5 8.40000097e+01 8.39999833e+01 1.18e-13 2.22e-16 8.83e-08 0s 6 8.40000000e+01 8.40000000e+01 5.27e-14 3.33e-16 8.86e-14 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 8.40000000e+01 Root relaxation: objective 8.400000e+01, 108 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 84.0000000 84.00000 0.0% - 0s Explored 0 nodes (108 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 8.400000000000e+01, best bound 8.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 84 Solution: 8 x [9, 16, 35] 2 x [34, 36, 38] 6 x [8, 19, 36] 10 x [4, 26, 39] 10 x [21, 25, 32] 5 x [7, 13, 24] 1 x [14, 33, 37] 3 x [17, 20, 37] 8 x [5, 10, 23] 9 x [1, 11, 22] 1 x [1, 22, 31] 1 x [9, 23, 40] 7 x [14, 29, 30] 5 x [2, 28, 31] 3 x [15, 27, 30] 2 x [15, 18, 27] 2 x [3, 6, 15] 1 x [7, 12, 15]