Build (method = -2) #dp: 2376 Step-3' Graph: 78 vertices and 224 arcs (0.01s) Step-4' Graph: 6 vertices and 80 arcs (0.01s) #V4/#V3 = 0.08 #A4/#A3 = 0.36 Ready! (0.01s) Optimize a model with 25 rows, 81 columns and 238 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 23 rows, 79 columns, 234 nonzeros Variable types: 0 continuous, 79 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1829.0000000 Optimize a model with 23 rows, 79 columns and 234 nonzeros Presolved: 23 rows, 79 columns, 234 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.100e+01 Factor NZ : 2.760e+02 Factor Ops : 4.324e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.85365585e+03 -9.16454127e+03 6.01e+02 0.00e+00 2.29e+02 0s 1 1.60693585e+03 -3.58166787e+03 3.96e+01 3.33e-16 3.66e+01 0s 2 7.61991971e+02 6.26419241e+01 1.35e-02 9.99e-16 3.99e+00 0s 3 5.22621227e+02 4.26299797e+02 8.39e-04 3.05e-16 5.44e-01 0s 4 5.01173179e+02 4.94828299e+02 3.47e-05 1.11e-16 3.58e-02 0s 5 5.00004575e+02 4.99991664e+02 1.84e-13 2.22e-16 7.29e-05 0s 6 5.00000000e+02 5.00000000e+02 1.42e-13 2.22e-16 1.05e-10 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+02 Root relaxation: objective 5.000000e+02, 69 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 (69 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: 7 x [5, 12, 16, 16] 164 x [4, 5, 11, 16] 4 x [8, 9, 11, 18] 94 x [1, 12, 13, 17] 9 x [9, 11, 15, 19] 20 x [2, 3, 15, 17] 61 x [7, 9, 12, 19] 1 x [1, 16, 17, 19] 5 x [1, 12, 17, 18] 14 x [1, 1, 12, 17] 11 x [1, 2, 12, 14] 80 x [6, 9, 11, 18] 30 x [1, 2, 10, 11]