Build (method = -2) #dp: 2767 Step-3' Graph: 74 vertices and 212 arcs (0.01s) Step-4' Graph: 6 vertices and 76 arcs (0.01s) #V4/#V3 = 0.08 #A4/#A3 = 0.36 Ready! (0.01s) Optimize a model with 24 rows, 77 columns and 226 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 22 rows, 75 columns, 222 nonzeros Variable types: 0 continuous, 75 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1929.0000000 Optimize a model with 22 rows, 75 columns and 222 nonzeros Presolved: 22 rows, 75 columns, 222 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.700e+01 Factor NZ : 2.530e+02 Factor Ops : 3.795e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.51126800e+03 -9.13246234e+03 5.79e+02 0.00e+00 2.26e+02 0s 1 1.29103298e+03 -3.51497495e+03 1.14e-12 3.33e-16 2.98e+01 0s 2 8.29060623e+02 -5.14646330e+02 9.66e-13 6.66e-16 8.15e+00 0s 3 5.23572186e+02 4.00793182e+02 1.85e-13 3.33e-16 7.31e-01 0s 4 5.01000994e+02 4.95872233e+02 1.24e-12 3.33e-16 3.05e-02 0s 5 5.00000821e+02 4.99998781e+02 4.47e-13 2.30e-16 1.21e-05 0s 6 5.00000000e+02 5.00000000e+02 3.88e-13 3.33e-16 1.26e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+02 Root relaxation: objective 5.000000e+02, 65 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 500.0000000 500.00000 0.0% - 0s Explored 0 nodes (65 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+02, best bound 5.000000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 500 Solution: 43 x [6, 14, 17, 18] 1 x [2, 6, 6, 14] 27 x [9, 13, 14, 15] 140 x [2, 5, 6, 10] 14 x [5, 6, 9, 18] 28 x [1, 2, 6, 12] 2 x [6, 9, 9, 12] 6 x [12, 15, 16, 18] 101 x [9, 11, 16, 16] 78 x [2, 3, 4, 13] 21 x [2, 3, 7, 9] 1 x [7, 9, 12, 15] 38 x [7, 8, 11, 18]