Starting with polynomial:
P : 2*t
Extension levels are: 1 8 14
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Trying to find an order 8 Kronrod extension for:
P1 : 2*t
Solvable: 1
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Trying to find an order 14 Kronrod extension for:
P2 : 2*t^9 - 36*t^7 + 189*t^5 - 315*t^3 + 945/8*t
Solvable: 1
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Ending with final polynomial:
P : 2*t^23 - 3309583/18099*t^21 + 82235713/12066*t^19 - 1089441955/8044*t^17 + 38063466049/24132*t^15 - 179492837615/16088*t^13 + 1547216966295/32176*t^11 - 7941468990455/64352*t^9 + 46161180640575/257408*t^7 - 70208873169435/514816*t^5 + 50216778386775/1029632*t^3 - 12961617443775/2059264*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:   21 out of 23
Indefinite weights: 0 out of 23
Negative weights:   2 out of 23
Extension rule has valid weights: 0
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*** EXTENSION WITH INVALID WEIGHTS ***
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