Build (method = -2) #dp: 2823 Step-3' Graph: 494 vertices and 1475 arcs (0.02s) Step-4' Graph: 268 vertices and 1023 arcs (0.02s) #V4/#V3 = 0.54 #A4/#A3 = 0.69 Ready! (0.02s) Optimize a model with 288 rows, 1024 columns and 2540 nonzeros Presolve removed 55 rows and 92 columns Presolve time: 0.01s Presolved: 233 rows, 932 columns, 2525 nonzeros Variable types: 0 continuous, 932 integer (0 binary) Optimize a model with 233 rows, 932 columns and 2525 nonzeros Presolved: 233 rows, 932 columns, 2525 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.681e+03 Factor NZ : 5.897e+03 Factor Ops : 1.965e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.09739082e+03 -7.27506517e+04 1.10e+05 1.21e-01 3.52e+02 0s 1 1.84381684e+03 -3.41691196e+04 1.59e+04 1.63e-02 5.87e+01 0s 2 7.10221632e+02 -1.12654889e+04 2.49e+03 3.33e-15 1.15e+01 0s 3 4.61516302e+02 -2.47554646e+03 2.44e+02 2.00e-15 1.96e+00 0s 4 3.33899959e+02 -1.15635431e+03 7.54e+00 1.22e-15 8.07e-01 0s 5 2.89957892e+02 -5.66026729e+02 4.34e+00 4.44e-16 4.62e-01 0s 6 2.45963998e+02 -2.32027337e+02 2.81e+00 4.44e-16 2.58e-01 0s 7 2.17137712e+02 -1.32407416e+01 1.49e+00 2.25e-16 1.24e-01 0s 8 1.96572812e+02 1.00320460e+02 7.23e-01 4.44e-16 5.18e-02 0s 9 1.87831858e+02 1.55187315e+02 2.95e-01 2.22e-16 1.76e-02 0s 10 1.82011644e+02 1.69483241e+02 8.06e-02 3.33e-16 6.73e-03 0s 11 1.80561474e+02 1.75559791e+02 3.70e-02 2.22e-16 2.69e-03 0s 12 1.79614249e+02 1.77084231e+02 1.21e-02 2.22e-16 1.36e-03 0s 13 1.79317964e+02 1.78117834e+02 6.42e-03 2.22e-16 6.44e-04 0s 14 1.79208901e+02 1.78628337e+02 4.26e-03 2.46e-16 3.12e-04 0s 15 1.79066470e+02 1.78909181e+02 4.54e-04 3.02e-16 8.44e-05 0s 16 1.79034475e+02 1.79027384e+02 1.53e-06 2.24e-16 3.80e-06 0s 17 1.79033334e+02 1.79033327e+02 1.23e-12 3.33e-16 3.80e-09 0s 18 1.79033333e+02 1.79033333e+02 2.45e-12 2.34e-16 3.80e-12 0s Barrier solved model in 18 iterations and 0.02 seconds Optimal objective 1.79033333e+02 Root relaxation: objective 1.790333e+02, 220 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 179.03333 0 61 - 179.03333 - - 0s H 0 0 196.0000000 179.03333 8.66% - 0s H 0 0 181.0000000 179.03333 1.09% - 0s 0 0 179.04000 0 77 181.00000 179.04000 1.08% - 0s H 0 0 180.0000000 179.04000 0.53% - 0s Cutting planes: Gomory: 2 Explored 0 nodes (418 simplex iterations) in 0.17 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.800000000000e+02, best bound 1.800000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.17 seconds Total run time: 0.20 seconds Objective: 180 Solution: 19 x [3, 4, 7, 16, 18] 4 x [3, 7, 10, 15, 16, 18] 1 x [7, 9, 11, 14, 16, 18] 16 x [1, 3, 6, 8, 14] 1 x [3, 6, 14] 10 x [6, 11, 13, 17] 8 x [1, 6, 7, 8, 9, 17] 14 x [6, 14, 15, 18, 20] 13 x [1, 4, 6, 14, 20] 1 x [2, 4, 6, 7, 8, 18] 4 x [4, 5, 6, 9, 11] 2 x [3, 4, 11, 14, 20] 3 x [2, 3, 4, 5, 14, 15] 9 x [2, 3, 4, 11, 14, 15] 1 x [10, 12, 13, 17, 20] 14 x [1, 8, 9, 13, 14, 18] 7 x [9, 14, 17, 18, 19] 2 x [1, 8, 9, 14, 17, 18] 1 x [4, 9, 11, 14, 15, 17] 1 x [1, 5, 9, 19, 20] 20 x [1, 9, 11, 19, 20] 1 x [1, 9, 19, 20] 17 x [5, 9, 10, 11, 18, 20] 9 x [1, 4, 7, 9, 10, 12, 14, 15] 1 x [2, 4, 7, 8, 9, 12, 14, 15] 1 x [1, 11, 14, 15]