------------------------------------------------------------
              α=3.0 —— tiny_instance_10_3 —— 10 nodes       
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——————— Wed, 03 Jan 2024 11:19:20 ————————— seperate y_ij <= y_jj - x_ij on lazy constraints
ILP ——— 11 hubs —— 1—7—2—9—3—8—4—6—10—5—11
total time           7.84                 gap                  0.0                  
LB <= UB             930.52<=930.52       subtour              4.0                  
connectivity cuts    1.0                  uc strategy          4                    
uc tolerance         0.01                 tildeV               2:10                 
2-opt strategy       0                                                              
explored_nodes       0                    n lazycuts edges     0.0                  
F                    13.0                 post procedure       true                 
o_i                  0                                                              o_i                  0                                                                                                                                                  
Found solution
RING NODES
1—7—2—9—3—8—4—6—10—5—11

RING
1  ---  7 | cost [108.0]
2  ---  7 | cost [72.0]
2  ---  9 | cost [48.0]
3  ---  8 | cost [45.0]
3  ---  9 | cost [24.0]
4  ---  6 | cost [123.0]
4  ---  8 | cost [132.0]
5  --- 10 | cost [69.0]
5  --- 11 | cost [45.0]
6  --- 10 | cost [138.0]

STAR

BACKUP RING
1  ---  2 | cost [1.71]
2  ---  3 | cost [0.6900000000000001]
3  ---  4 | cost [1.71]
4  --- 10 | cost [1.77]
5  ---  6 | cost [2.04]
6  ---  8 | cost [1.86]
7  ---  9 | cost [0.81]
8  ---  9 | cost [0.6900000000000001]
10 --- 11 | cost [0.93]

BACKUP STAR

B = 2.04
i★ = 5
j★ = 10
k★ = 6