Starting with polynomial:
P : t^2 - 1
Extension levels are: 2 3 14
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Trying to find an order 3 Kronrod extension for:
P1 : t^2 - 1
Solvable: 1
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Trying to find an order 14 Kronrod extension for:
P2 : t^5 - 7*t^3 + 6*t
Solvable: 1
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Ending with final polynomial:
P : t^19 - 29110357381/203985108*t^17 + 1619951720893/203985108*t^15 - 15088279415755/67995036*t^13 + 227384524996265/67995036*t^11 - 1848310702373135/67995036*t^9 + 851785811281405/7555004*t^7 - 1578667637211665/7555004*t^5 + 958190018560775/7555004*t^3 - 24793868073975/3777502*t
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Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
 current precision for weights: 53
Linear system for weights solvable: 0
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 106
Linear system for weights solvable: 1
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 212
Linear system for weights solvable: 1
Sufficient bits for target precision reached
Positive weights:   18 out of 19
Indefinite weights: 0 out of 19
Negative weights:   1 out of 19
Extension rule has valid weights: 0
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*** EXTENSION WITH INVALID WEIGHTS ***
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