Starting with polynomial:
P : -1/39916800*t^11 + 11/3628800*t^10 - 11/72576*t^9 + 11/2688*t^8 - 11/168*t^7 + 77/120*t^6 - 77/20*t^5 + 55/4*t^4 - 55/2*t^3 + 55/2*t^2 - 11*t + 1
Extension levels are: 11 20
-------------------------------------------------
Trying to find an order 20 Kronrod extension for:
P1 : -1/39916800*t^11 + 11/3628800*t^10 - 11/72576*t^9 + 11/2688*t^8 - 11/168*t^7 + 77/120*t^6 - 77/20*t^5 + 55/4*t^4 - 55/2*t^3 + 55/2*t^2 - 11*t + 1
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : -1/39916800*t^31 + 1915775589568051119924779058808677305395520485242236102572846315907/105393851672213585459374657579984306821408885194903283346442293184505600*t^30 - 50035361100364010042842434150060563108922023204606835169481390540939/8130382843285048021151759299027360811937256857892539001011262617090432*t^29 + 136700916348577908958856992794866499528894465837494388285553640617071749/105694976962705624274972870887355690555184339152603007013146414022175616*t^28 - 35024931387195200991031229214875963243995709391211051284044028967830196417/184966209684734842481202524052872458471572593517055262273006224538807328*t^27 + 703823921424939641028262461213755110045147264066625294840868295492907788339/34253001793469415274296763713494899716957887688343567087593745284964320*t^26 - 29398875160396445082715047673757192379885395435019300817039279608735875656517/17126500896734707637148381856747449858478943844171783543796872642482160*t^25 + 387774783108723728605957271586394027454196686053987222827218603548500257280815/3425300179346941527429676371349489971695788768834356708759374528496432*t^24 - 855894473265320197282694953160726003842771671506044086667801017476659455672545/142720840806122563642903182139562082153991198701431529531640605354018*t^23 + 36861346878185344379863386467425600041394728992070891216691136517384215792267345/142720840806122563642903182139562082153991198701431529531640605354018*t^22 - 650829715401661567169976996187687494436107612063129176895371896968145404168394649/71360420403061281821451591069781041076995599350715764765820302677009*t^21 + 246127160868024806463905113086329832590826297512739942858930147593797261061014567/926758706533263400278592091815338195805137653905399542413250684117*t^20 - 5018600623040614602443721454878229468530233369077495981717439458586624561587460900/784180443989684415620347154612978473373578014843030382041981348099*t^19 + 1303267164775236207588671083634610748269677942045142728803723332586043123619226876900/10194345771865897403064513009968720153856514192959394966545757525287*t^18 - 799388905378389314973892764913377681147836236090831738134044054355655944373327488200/377568361920959163076463444813656301994685710850347961723916945381*t^17 + 10960528406585622737122349241351486519249514762594625186178453042209555836624122588920/377568361920959163076463444813656301994685710850347961723916945381*t^16 - 124070455639488901130024141572063437939702765903157786918838340573202820744530513409920/377568361920959163076463444813656301994685710850347961723916945381*t^15 + 1154540334666205137317201990147454764363962915617114886531025822960358446139464561712000/377568361920959163076463444813656301994685710850347961723916945381*t^14 - 8780358491574095680552420807487483830342294252849407632635736329968451531539036521184000/377568361920959163076463444813656301994685710850347961723916945381*t^13 + 4166132343257837194840727875240683168183192068594489204058037739747870498080423499808000/29043720147766089467420264985665869384206593142334458594147457337*t^12 - 20643148989045335048670458155578989011248348805989259100569105688442059534020481594649600/29043720147766089467420264985665869384206593142334458594147457337*t^11 + 7380118876415498686635281252124238581948315181679439818553759898908490912737929122329600/2640338195251462678856387725969624489473326649303132599467950667*t^10 - 22689255274398116010652164584613912795961050895039408923053024389228652757247395782400000/2640338195251462678856387725969624489473326649303132599467950667*t^9 + 53504786447200302297548625836262844569187405851181554687927379690663383173524228972800000/2640338195251462678856387725969624489473326649303132599467950667*t^8 - 94458956765788626873973968215870144632405268605106019766963770357112521462678859315200000/2640338195251462678856387725969624489473326649303132599467950667*t^7 + 9304988616876375140293006769762330916486572129086849863411106837017745459641694574592000/203102938096266359912029825074586499190255896100240969189842359*t^6 - 107713942273291860945018978017179733802900711676628102148947288015934697614821572079616000/2640338195251462678856387725969624489473326649303132599467950667*t^5 + 62867230892869805269347119693332821141455495828430051154718553772743952853631209164800000/2640338195251462678856387725969624489473326649303132599467950667*t^4 - 22026250795348979689174298545234742222541459191211571967707136987887419895142826393600000/2640338195251462678856387725969624489473326649303132599467950667*t^3 + 4007170737327274765880138129420090523831623110746905611395465859151416752973734297600000/2640338195251462678856387725969624489473326649303132599467950667*t^2 - 283895560754269998506657099247454506060002416956230732446145621340677633894080020480000/2640338195251462678856387725969624489473326649303132599467950667*t + 3362577965715373270116662550515268374409776775566331643040225206438487042417786880000/2640338195251462678856387725969624489473326649303132599467950667
-------------------------------------------------
Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 53
Linear system for weights solvable: 0
  current precision for roots: 106
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 106
Linear system for weights solvable: 0
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 212
Linear system for weights solvable: 1
  current precision for roots: 424
  current precision for roots: 848
 current precision for weights: 424
Linear system for weights solvable: 1
Sufficient bits for target precision reached
Positive weights:   30 out of 31
Indefinite weights: 0 out of 31
Negative weights:   1 out of 31
Extension rule has valid weights: 0
**************************************
*** EXTENSION WITH INVALID WEIGHTS ***
**************************************
Starting with polynomial:
P : -1/39916800*t^11 + 11/3628800*t^10 - 11/72576*t^9 + 11/2688*t^8 - 11/168*t^7 + 77/120*t^6 - 77/20*t^5 + 55/4*t^4 - 55/2*t^3 + 55/2*t^2 - 11*t + 1
Extension levels are: 11 20
-------------------------------------------------
Trying to find an order 20 Kronrod extension for:
P1 : -1/39916800*t^11 + 11/3628800*t^10 - 11/72576*t^9 + 11/2688*t^8 - 11/168*t^7 + 77/120*t^6 - 77/20*t^5 + 55/4*t^4 - 55/2*t^3 + 55/2*t^2 - 11*t + 1
Solvable: 1
-------------------------------------------------
Ending with final polynomial:
P : -1/39916800*t^31 + 1915775589568051119924779058808677305395520485242236102572846315907/105393851672213585459374657579984306821408885194903283346442293184505600*t^30 - 50035361100364010042842434150060563108922023204606835169481390540939/8130382843285048021151759299027360811937256857892539001011262617090432*t^29 + 136700916348577908958856992794866499528894465837494388285553640617071749/105694976962705624274972870887355690555184339152603007013146414022175616*t^28 - 35024931387195200991031229214875963243995709391211051284044028967830196417/184966209684734842481202524052872458471572593517055262273006224538807328*t^27 + 703823921424939641028262461213755110045147264066625294840868295492907788339/34253001793469415274296763713494899716957887688343567087593745284964320*t^26 - 29398875160396445082715047673757192379885395435019300817039279608735875656517/17126500896734707637148381856747449858478943844171783543796872642482160*t^25 + 387774783108723728605957271586394027454196686053987222827218603548500257280815/3425300179346941527429676371349489971695788768834356708759374528496432*t^24 - 855894473265320197282694953160726003842771671506044086667801017476659455672545/142720840806122563642903182139562082153991198701431529531640605354018*t^23 + 36861346878185344379863386467425600041394728992070891216691136517384215792267345/142720840806122563642903182139562082153991198701431529531640605354018*t^22 - 650829715401661567169976996187687494436107612063129176895371896968145404168394649/71360420403061281821451591069781041076995599350715764765820302677009*t^21 + 246127160868024806463905113086329832590826297512739942858930147593797261061014567/926758706533263400278592091815338195805137653905399542413250684117*t^20 - 5018600623040614602443721454878229468530233369077495981717439458586624561587460900/784180443989684415620347154612978473373578014843030382041981348099*t^19 + 1303267164775236207588671083634610748269677942045142728803723332586043123619226876900/10194345771865897403064513009968720153856514192959394966545757525287*t^18 - 799388905378389314973892764913377681147836236090831738134044054355655944373327488200/377568361920959163076463444813656301994685710850347961723916945381*t^17 + 10960528406585622737122349241351486519249514762594625186178453042209555836624122588920/377568361920959163076463444813656301994685710850347961723916945381*t^16 - 124070455639488901130024141572063437939702765903157786918838340573202820744530513409920/377568361920959163076463444813656301994685710850347961723916945381*t^15 + 1154540334666205137317201990147454764363962915617114886531025822960358446139464561712000/377568361920959163076463444813656301994685710850347961723916945381*t^14 - 8780358491574095680552420807487483830342294252849407632635736329968451531539036521184000/377568361920959163076463444813656301994685710850347961723916945381*t^13 + 4166132343257837194840727875240683168183192068594489204058037739747870498080423499808000/29043720147766089467420264985665869384206593142334458594147457337*t^12 - 20643148989045335048670458155578989011248348805989259100569105688442059534020481594649600/29043720147766089467420264985665869384206593142334458594147457337*t^11 + 7380118876415498686635281252124238581948315181679439818553759898908490912737929122329600/2640338195251462678856387725969624489473326649303132599467950667*t^10 - 22689255274398116010652164584613912795961050895039408923053024389228652757247395782400000/2640338195251462678856387725969624489473326649303132599467950667*t^9 + 53504786447200302297548625836262844569187405851181554687927379690663383173524228972800000/2640338195251462678856387725969624489473326649303132599467950667*t^8 - 94458956765788626873973968215870144632405268605106019766963770357112521462678859315200000/2640338195251462678856387725969624489473326649303132599467950667*t^7 + 9304988616876375140293006769762330916486572129086849863411106837017745459641694574592000/203102938096266359912029825074586499190255896100240969189842359*t^6 - 107713942273291860945018978017179733802900711676628102148947288015934697614821572079616000/2640338195251462678856387725969624489473326649303132599467950667*t^5 + 62867230892869805269347119693332821141455495828430051154718553772743952853631209164800000/2640338195251462678856387725969624489473326649303132599467950667*t^4 - 22026250795348979689174298545234742222541459191211571967707136987887419895142826393600000/2640338195251462678856387725969624489473326649303132599467950667*t^3 + 4007170737327274765880138129420090523831623110746905611395465859151416752973734297600000/2640338195251462678856387725969624489473326649303132599467950667*t^2 - 283895560754269998506657099247454506060002416956230732446145621340677633894080020480000/2640338195251462678856387725969624489473326649303132599467950667*t + 3362577965715373270116662550515268374409776775566331643040225206438487042417786880000/2640338195251462678856387725969624489473326649303132599467950667
-------------------------------------------------
Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 53
Linear system for weights solvable: 0
  current precision for roots: 106
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 106
Linear system for weights solvable: 0
  current precision for roots: 212
  current precision for roots: 424
 current precision for weights: 212
Linear system for weights solvable: 1
  current precision for roots: 424
  current precision for roots: 848
 current precision for weights: 424
Linear system for weights solvable: 1
Sufficient bits for target precision reached
Positive weights:   30 out of 31
Indefinite weights: 0 out of 31
Negative weights:   1 out of 31
Extension rule has valid weights: 0
**************************************
*** EXTENSION WITH INVALID WEIGHTS ***
**************************************
