Build (method = -2) #dp: 5833 Step-3' Graph: 94 vertices and 275 arcs (0.03s) Step-4' Graph: 13 vertices and 113 arcs (0.03s) #V4/#V3 = 0.14 #A4/#A3 = 0.41 Ready! (0.03s) Optimize a model with 31 rows, 114 columns and 320 nonzeros Presolve removed 5 rows and 7 columns Presolve time: 0.00s Presolved: 26 rows, 107 columns, 306 nonzeros Variable types: 0 continuous, 107 integer (5 binary) Found heuristic solution: objective 198.0000000 Found heuristic solution: objective 154.0000000 Optimize a model with 26 rows, 107 columns and 306 nonzeros Presolved: 26 rows, 107 columns, 306 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.140e+02 Factor NZ : 2.830e+02 Factor Ops : 4.025e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.48664193e+03 -2.10161138e+03 4.26e+02 7.96e-02 6.53e+01 0s 1 3.61607663e+02 -8.30142499e+02 3.66e+01 6.66e-16 8.75e+00 0s 2 1.35915398e+02 -1.99947035e+02 1.66e+00 1.78e-15 1.53e+00 0s 3 5.41092182e+01 -9.53949505e+00 6.61e-02 3.33e-16 2.77e-01 0s 4 4.15510023e+01 3.31176027e+01 5.76e-03 2.78e-16 3.67e-02 0s 5 4.04152679e+01 3.97701382e+01 1.74e-03 3.50e-16 2.80e-03 0s 6 4.00002396e+01 3.99984990e+01 3.29e-14 2.64e-16 7.57e-06 0s 7 4.00000000e+01 4.00000000e+01 1.31e-14 3.33e-16 7.61e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 88 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 40.0000000 40.00000 0.0% - 0s Explored 0 nodes (88 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.00 seconds Total run time: 0.04 seconds Objective: 40 Solution: 1 x [9, 10, 11, 12, 13] 14 x [6, 12, 13, 14, 17] 2 x [1, 2, 6, 13, 15] 8 x [5, 7, 11, 12, 18] 6 x [1, 5, 12, 12, 16] 5 x [2, 4, 5, 10, 18] 1 x [2, 3, 6, 15, 18] 1 x [2, 3, 8, 15, 18] 2 x [2, 7, 12, 14, 16]