Welcome to Sherpa, Daniel Reichelt on ip3-cpu2.phyip3.dur.ac.uk. Initialization of framework underway ... Local time: Tue Nov 5 17:57:00 2024 Seed mode: '*' Memory limit: 502.838 GB Seed: 3045 ┌──────────────────────────────────────────────────────────────────────────────┐ │  ._ │ │  .-#. │ │  .--+@. . │ │  .----@@. +#- │ │  .-----+@@. +**@- SHERPA v3.0.1 (Erebus) │ │  :- .-------@@@+***#@- │ │  :=#* .--------+@+*****@@- Monte Carlo event generator │ │  :===@* .----------+******#@@- │ │  :====#@*----------+********@@@- https://sherpa-team.gitlab.io │ │  :======@@*--------+*********#@@@- │ │ │ │ Authors: Enrico Bothmann, Lois Flower, Christian Gutschow, │ │ Stefan Hoeche, Mareen Hoppe, Joshua Isaacson, │ │ Max Knobbe, Frank Krauss, Peter Meinzinger, │ │ Davide Napoletano, Alan Price, Daniel Reichelt, │ │ Marek Schoenherr, Steffen Schumann, Frank Siegert │ │ Former Authors: Gurpreet Singh Chahal, Timo Fischer, Tanju Gleisberg, │ │ Hendrik Hoeth, Johannes Krause, Silvan Kuttimalai, │ │ Ralf Kuhn, Thomas Laubrich, Sebastian Liebschner, │ │ Andreas Schaelicke, Holger Schulz, Jan Winter │ │ │ │ Users are kindly asked to cite SciPost Phys 7 (2019) 3, 034. │ │ │ │ This program uses a lot of genuine and original research work by others. │ │ Users are encouraged to also cite the various original publications. │ │ │ └──────────────────────────────────────────────────────────────────────────────┘ Git branch: rel-3-0-x Revision: 9b5228107c78210a21d3593aa2fb906c83f2587c. Initializing hadron particle information ... Initializing beam spectra ... Type: Collider Setup Beam 1: P+ (enabled = 0, momentum = (6500,0,0,6500)) Beam 2: P+ (enabled = 0, momentum = (6500,0,0,-6500)) Initializing PDFs ... Hard scattering: PDF4LHC21_40_pdfas + PDF4LHC21_40_pdfas MPI: PDF4LHC21_40_pdfas + PDF4LHC21_40_pdfas Fixed electroweak parameters Input scheme: Gmu scheme, input: GF, m_W, m_Z, m_h, widths Ren. scheme: Gmu Parameters: sin^2(\theta_W) = 0.223043 - 0.00110541 i vev = 246.218 Set \alpha according to EW scheme 1/\alpha(0) = 137.036 1/\alpha(def) = 132.119 Particle data: ┌─────────────────────────────────────────────────────────────────────────────────────────┐ │ Name Kf-code Mass Width Stable Massive Active Yukawa │ ├─────────────────────────────────────────────────────────────────────────────────────────┤ │ d 1 0.01 0 1 0 1 0 │ │ u 2 0.005 0 1 0 1 0 │ │ s 3 0.2 0 1 0 1 0 │ │ c 4 1.42 0 1 0 1 0 │ │ b 5 4.92 0 1 0 1 0 │ │ t 6 172.5 1.32 0 1 1 172.5 │ │ e- 11 0.000511 0 1 0 1 0 │ │ ve 12 0 0 1 0 1 0 │ │ mu- 13 0.105 0 1 0 1 0 │ │ vmu 14 0 0 1 0 1 0 │ │ tau- 15 1.777 2.26735e-12 0 0 1 0 │ │ vtau 16 0 0 1 0 1 0 │ │ G 21 0 0 1 0 1 0 │ │ P 22 0 0 1 0 1 0 │ │ Z 23 91.1876 2.4952 0 1 1 91.1876 │ │ W+ 24 80.379 2.085 0 1 1 80.379 │ │ h0 25 125.09 0.0041 0 1 1 125.09 │ │ Instanton 999 0 0 0 0 1 0 │ └─────────────────────────────────────────────────────────────────────────────────────────┘ Particle containers: ┌─────────────────────────────────────────────────────────────────────────────────────────┐ │ Name Kf-code Constituents │ ├─────────────────────────────────────────────────────────────────────────────────────────┤ │ l 90 e-, e+, mu-, mu+, tau-, tau+ │ │ v 91 ve, veb, vmu, vmub, vtau, vtaub │ │ f 92 d, db, u, ub, s, sb, c, cb, b, bb, e-, e+, mu-, mu+, │ │ tau-, tau+, ve, veb, vmu, vmub, vtau, vtaub │ │ j 93 d, db, u, ub, s, sb, c, cb, b, bb, G │ │ Q 94 d, db, u, ub, s, sb, c, cb, b, bb │ │ ewj 98 d, db, u, ub, s, sb, c, cb, b, bb, G, P │ └─────────────────────────────────────────────────────────────────────────────────────────┘ Initializing primordial transverse momentum ... Initializing remnants ... Hard process: P+ (Hadron) + P+ (Hadron) Initializing showers ... Initializing matrix elements for the hard processes ... Initializing Comix ... Massive PS flavours for Comix: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Massive PS flavours for Amegic: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Massive PS flavours for Internal: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Building processes (3 ME generators, 1 process blocks) ... Setting up processes ............ done (164 MB, 0s/0s) Performing tests ............ done (164 MB, 0s/0s) Initializing scales done (164 MB, 0s/0s) Initializing the beam remnants ... Massive PS flavours for Amisic: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Multiple interactions initialized id = 2, name = Amisic, type = 1 Underlying event/multiple interactions initialized MI[2]: on = 1 (type = 1, Amisic) Soft-collision handlers: Type[2]: None Initializing hadron particle information ... Initialized fragmentation Initialized hadron decays (model = HADRONS++) Initialized soft photons Initialized on-the-fly reweighting ISR_Channels::CheckForStructuresFromME for 0: (none) Read in channels from directory: Results/Comix/MC_2_2__j__j__j__j Calculating xs for '2_2__j__j__j__j' (Comix) ... 2_2__j__j__j__j : 1.25823e+08 pb +- ( 643740 pb = 0.511624 % )  exp. eff: 2.44305e-07 % reduce max for 2_2__j__j__j__j to 0.0301605 ( eps = 0.001 -> exp. eff 8.10017e-08 ) ┌──────────────────────────────────────────────────────────────────────────────┐ │ SHERPA generates events with the following structure: │ │ Event generation Weighted │ │ Perturbative Signal_Processes │ │ Perturbative Minimum_Bias: None │ │ Perturbative Hard_Decays │ │ Perturbative Jet_Evolution:CSS │ │ Perturbative Lepton_FS_QED_Corrections:Photons │ │ Perturbative Multiple_Interactions: Amisic │ │ Hadronization Beam_Remnants: Parametrised │ │ Hadronization Hadronization: Ahadic │ │ Hadronization Hadron_Decays │ │ Userhook None │ │ Analysis Rivet │ │ Reweighting 7 variations │ └──────────────────────────────────────────────────────────────────────────────┘ #-------------------------------------------------------------------------- # FastJet release 3.3.2 [fjcore] # M. Cacciari, G.P. Salam and G. Soyez # A software package for jet finding and analysis at colliders # http://fastjet.fr # # Please cite EPJC72(2012)1896 [arXiv:1111.6097] if you use this package # for scientific work and optionally PLB641(2006)57 [hep-ph/0512210]. # # FastJet is provided without warranty under the terms of the GNU GPLv2. # It uses T. Chan's closest pair algorithm, S. Fortune's Voronoi code # and 3rd party plugin jet algorithms. See COPYING file for details. #-------------------------------------------------------------------------- Event 1 ( 12s elapsed / 13d 21h 36m 27s left ) -> ETA: Tue Nov 19 15:33 XS = 2420.49 pb +- ( 2420.49 pb = 100 % ) Event 2 ( 12s elapsed / 6d 23h 38m 7s left ) -> ETA: Tue Nov 12 17:35 XS = 120781 pb +- ( 119573 pb = 98 % ) Event 3 ( 12s elapsed / 4d 16h 2m 1s left ) -> ETA: Sun Nov 10 09:59 XS = 171732 pb +- ( 98715.7 pb = 57 % ) Event 4 ( 12s elapsed / 3d 12h 26m 27s left ) -> ETA: Sat Nov 09 06:23 XS = 137534 pb +- ( 83763.5 pb = 60 % ) Event 5 ( 12s elapsed / 2d 19h 53m 7s left ) -> ETA: Fri Nov 08 13:50 XS = 114817 pb +- ( 72066.7 pb = 62 % ) Event 6 ( 12s elapsed / 2d 8h 42m 34s left ) -> ETA: Fri Nov 08 02:39 XS = 98420.8 pb +- ( 63075.9 pb = 64 % ) Event 7 ( 12s elapsed / 2d 41m 13s left ) -> ETA: Thu Nov 07 18:38 XS = 8.15454e+07 pb +- ( 8.1447e+07 pb = 99 % ) Event 8 ( 12s elapsed / 1d 18h 44m 22s left ) -> ETA: Thu Nov 07 12:41 XS = 7.25249e+07 pb +- ( 7.23937e+07 pb = 99 % ) Event 9 ( 12s elapsed / 1d 14h 4m 58s left ) -> ETA: Thu Nov 07 08:02 XS = 6.53495e+07 pb +- ( 6.51472e+07 pb = 99 % ) Event 10 ( 12s elapsed / 1d 10h 21m 27s left ) -> ETA: Thu Nov 07 04:18 XS = 5.44583e+07 pb +- ( 5.42924e+07 pb = 99 % ) Event 20 ( 12s elapsed / 17h 38m 57s left ) -> ETA: Wed Nov 06 11:36 XS = 2.46432e+07 pb +- ( 2.24748e+07 pb = 91 % ) Event 30 ( 13s elapsed / 12h 8m 6s left ) -> ETA: Wed Nov 06 06:05 XS = 7.83524e+07 pb +- ( 5.30587e+07 pb = 67 % ) Event 40 ( 13s elapsed / 9h 18m 56s left ) -> ETA: Wed Nov 06 03:16 XS = 9.83889e+07 pb +- ( 4.49233e+07 pb = 45 % ) Event 50 ( 13s elapsed / 7h 41m 26s left ) -> ETA: Wed Nov 06 01:38 XS = 1.08895e+08 pb +- ( 4.58911e+07 pb = 42 % ) Event 60 ( 14s elapsed / 6h 36m 59s left ) -> ETA: Wed Nov 06 00:34 XS = 9.19222e+07 pb +- ( 3.88576e+07 pb = 42 % ) Event 70 ( 14s elapsed / 5h 50m 28s left ) -> ETA: Tue Nov 05 23:47 XS = 8.00479e+07 pb +- ( 3.36834e+07 pb = 42 % ) Event 80 ( 15s elapsed / 5h 15m 22s left ) -> ETA: Tue Nov 05 23:12 XS = 7.45974e+07 pb +- ( 3.01105e+07 pb = 40 % ) Event 90 ( 15s elapsed / 4h 46m 46s left ) -> ETA: Tue Nov 05 22:44 XS = 8.16105e+07 pb +- ( 2.84794e+07 pb = 34 % ) Event 100 ( 15s elapsed / 4h 25m 24s left ) -> ETA: Tue Nov 05 22:22 XS = 7.96838e+07 pb +- ( 2.60381e+07 pb = 32 % ) Event 200 ( 19s elapsed / 2h 46m 15s left ) -> ETA: Tue Nov 05 20:43 XS = 9.04081e+07 pb +- ( 2.40362e+07 pb = 26 % ) Event 300 ( 24s elapsed / 2h 13m 49s left ) -> ETA: Tue Nov 05 20:11 XS = 7.45325e+07 pb +- ( 1.65373e+07 pb = 22 % ) Event 400 ( 28s elapsed / 1h 56m 14s left ) -> ETA: Tue Nov 05 19:53 XS = 8.92151e+07 pb +- ( 1.81947e+07 pb = 20 % ) Event 500 ( 32s elapsed / 1h 46m 33s left ) -> ETA: Tue Nov 05 19:44 XS = 1.14245e+08 pb +- ( 2.05538e+07 pb = 17 % ) Event 600 ( 36s elapsed / 1h 40m 18s left ) -> ETA: Tue Nov 05 19:37 XS = 1.13235e+08 pb +- ( 1.77848e+07 pb = 15 % ) Event 700 ( 40s elapsed / 1h 36m 10s left ) -> ETA: Tue Nov 05 19:33 XS = 1.13898e+08 pb +- ( 1.64338e+07 pb = 14 % ) Event 800 ( 44s elapsed / 1h 32m 37s left ) -> ETA: Tue Nov 05 19:30 XS = 1.16168e+08 pb +- ( 1.59632e+07 pb = 13 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.0843484,3.0809e-05,-5.02482e-05,0.0738431) (1) Blob_List::FourMomentumConservation throws four momentum error for Shower : (0.0260983,-1.05585e-05,8.20539e-06,-0.031837) (1) Blob_List::FourMomentumConservation throws four momentum error for Shower : (-0.0654821,-3.99797e-06,-1.15221e-05,-0.0111079) (2) Blob_List::FourMomentumConservation throws four momentum error for Shower : (-0.0402987,-5.55756e-06,1.21972e-05,0.00108652) (3) Blob_List::FourMomentumConservation throws four momentum error for Shower : (0.0104211,-1.21379e-06,4.82224e-06,0.0120744) (4) Blob_List::FourMomentumConservation throws four momentum error for Shower : (-0.106448,0.0276261,-0.00593042,-0.218259) (5) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (-4.80931e-07,-4.79132e-10,6.76024e-10,-6.71901e-08) (1) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (-4.96925e-10,-1.35605e-12,-8.04257e-12,4.96861e-10) (1) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (-3.66143e-11,2.53103e-13,2.77611e-13,-3.66214e-11) (2) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (-4.23306e-11,6.25722e-13,1.59506e-12,4.23128e-11) (3) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (6.90576e-11,-2.10443e-13,2.32203e-13,-6.90505e-11) (4) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (2.66525e-11,-4.22828e-13,2.41696e-13,2.664e-11) (5) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 900 ( 48s elapsed / 1h 29m 34s left ) -> ETA: Tue Nov 05 19:27 XS = 1.11944e+08 pb +- ( 1.45542e+07 pb = 13 % ) Event 1000 ( 52s elapsed / 1h 26m 48s left ) -> ETA: Tue Nov 05 19:24 XS = 1.16462e+08 pb +- ( 1.57276e+07 pb = 13 % ) Event 2000 ( 1m 33s elapsed / 1h 15m 58s left ) -> ETA: Tue Nov 05 19:14 XS = 1.07275e+08 pb +- ( 1.16064e+07 pb = 10 % ) Event 3000 ( 2m 16s elapsed / 1h 13m 30s left ) -> ETA: Tue Nov 05 19:12 XS = 1.07061e+08 pb +- ( 9.05045e+06 pb = 8 % ) Decay_Handler_Base::TreatInitialBlob:("Initial particle Delta(1232)++b not onshell: sqrt|p^2|=1.232 vs. m=1.232") Event 4000 ( 2m 58s elapsed / 1h 11m 15s left ) -> ETA: Tue Nov 05 19:11 XS = 1.13831e+08 pb +- ( 7.99576e+06 pb = 7 % ) Event 5000 ( 3m 41s elapsed / 1h 9m 59s left ) -> ETA: Tue Nov 05 19:10 XS = 1.14932e+08 pb +- ( 7.33636e+06 pb = 6 % ) Event 6000 ( 4m 23s elapsed / 1h 8m 48s left ) -> ETA: Tue Nov 05 19:10 XS = 1.14794e+08 pb +- ( 6.86333e+06 pb = 5 % ) Event 7000 ( 5m 5s elapsed / 1h 7m 33s left ) -> ETA: Tue Nov 05 19:09 XS = 1.20698e+08 pb +- ( 6.53133e+06 pb = 5 % ) Event 8000 ( 5m 46s elapsed / 1h 6m 28s left ) -> ETA: Tue Nov 05 19:09 XS = 1.22496e+08 pb +- ( 6.33214e+06 pb = 5 % ) Event 9000 ( 6m 29s elapsed / 1h 5m 34s left ) -> ETA: Tue Nov 05 19:09 XS = 1.2297e+08 pb +- ( 6.01552e+06 pb = 4 % ) Event 10000 ( 7m 11s elapsed / 1h 4m 42s left ) -> ETA: Tue Nov 05 19:08 XS = 1.22205e+08 pb +- ( 5.64449e+06 pb = 4 % ) Event 20000 ( 14m 28s elapsed / 57m 55s left ) -> ETA: Tue Nov 05 19:09 XS = 1.22449e+08 pb +- ( 4.02384e+06 pb = 3 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.148417,-7.34777e-05,5.21806e-06,0.0396067) (2) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (7.8356e-07,-6.60014e-10,3.67943e-09,-9.93879e-07) (2) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 30000 ( 21m 35s elapsed / 50m 22s left ) -> ETA: Tue Nov 05 19:09 XS = 1.22769e+08 pb +- ( 3.27196e+06 pb = 2 % ) Event 40000 ( 28m 40s elapsed / 43m left ) -> ETA: Tue Nov 05 19:08 XS = 1.23293e+08 pb +- ( 2.85837e+06 pb = 2 % ) Decay_Handler_Base::TreatInitialBlob:("Initial particle Delta(1232)++ not onshell: sqrt|p^2|=1.232 vs. m=1.232") Event 50000 ( 35m 58s elapsed / 35m 58s left ) -> ETA: Tue Nov 05 19:09  Memory usage increased by 20 MB, now 472 MB.  This might indicate a memory leak! Please monitor this process closely. XS = 1.22025e+08 pb +- ( 2.50209e+06 pb = 2 % ) Event 60000 ( 43m 4s elapsed / 28m 43s left ) -> ETA: Tue Nov 05 19:08 XS = 1.23619e+08 pb +- ( 2.35062e+06 pb = 1 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.12482,-1.13281e-05,-8.87258e-05,-0.117387) (3) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (-5.77711e-08,6.7331e-10,1.51016e-10,-1.4295e-07) (3) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.00931744,4.10935e-07,1.36958e-06,-0.0052616) (4) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (1.77671e-07,1.47233e-10,-1.22804e-10,1.29151e-07) (4) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 70000 ( 49m 59s elapsed / 21m 25s left ) -> ETA: Tue Nov 05 19:08 XS = 1.24554e+08 pb +- ( 2.19046e+06 pb = 1 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.0636811,3.03402e-05,4.09899e-05,0.0453133) (5) WARNING: last allowed error message from 'FourMomentumConservation' Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (1.34335e-06,4.52149e-11,6.47179e-10,8.11764e-07) (5) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 80000 ( 56m 51s elapsed / 14m 12s left ) -> ETA: Tue Nov 05 19:08 XS = 1.24174e+08 pb +- ( 2.04903e+06 pb = 1 % ) Event 90000 ( 1h 3m 42s elapsed / 7m 4s left ) -> ETA: Tue Nov 05 19:07 XS = 1.24343e+08 pb +- ( 1.93845e+06 pb = 1 % ) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 100000 ( 4215 s total ) = 2.04987e+06 evts/day Summarizing the run may take some time ... ┌────────────────────────────────────────────────────────────────────────────┐ │ Nominal or variation name XS [pb] RelDev AbsErr [pb] RelErr │ ├────────────────────────────────────────────────────────────────────────────┤ │ Nominal  1.23411e+08 0 % 1.81956e+06 1.47 % │ │ ME & PS:  1.23411e+08 0 % 1.81956e+06 1.47 % │ │ ME & PS: MUF=0.5  1.07316e+08 -13.04 % 2.19769e+06 2.04 % │ │ ME & PS: MUF=2  1.34706e+08 9.15 % 2.1189e+06 1.57 % │ │ ME & PS: MUR=0.5  1.60815e+08 30.3 % 2.55609e+06 1.58 % │ │ ME & PS: MUR=0.5 MUF=0.5  1.38623e+08 12.32 % 3.00487e+06 2.16 % │ │ ME & PS: MUR=2  9.81412e+07 -20.47 % 1.4727e+06 1.5 % │ │ ME & PS: MUR=2 MUF=2  1.07443e+08 -12.93 % 1.76973e+06 1.64 % │ │ ME-only:  1.23411e+08 0 % 1.81956e+06 1.47 % │ │ ME-only: MUF=0.5  1.08277e+08 -12.26 % 1.57458e+06 1.45 % │ │ ME-only: MUF=2  1.3535e+08 9.67 % 2.02463e+06 1.49 % │ │ ME-only: MUR=0.5  1.60871e+08 30.35 % 2.38973e+06 1.48 % │ │ ME-only: MUR=0.5 MUF=0.5  1.41093e+08 14.32 % 2.06806e+06 1.46 % │ │ ME-only: MUR=2  9.78333e+07 -20.72 % 1.4341e+06 1.46 % │ │ ME-only: MUR=2 MUF=2  1.07277e+08 -13.07 % 1.59576e+06 1.48 % │ └────────────────────────────────────────────────────────────────────────────┘ Event generation statistics: Generated events: 100000 New events: From "Beam_Remnants: Parametrised": 1758 (101767) -> 1.7 % From "Jet_Evolution:CSS": 63 (561103) -> 0 % Retried events: From "Hadron_Decays": 2 (123422) -> 0 % Retried phases: From "Hadron_Decay_Handler::RejectExclusiveChannelsFromFragmentation": 10076 (0) Retried methods: From "Decay_Channel::GenerateKinematics": 1165 (27466911) -> 0 % Reweighting statistics: different PDF cut-off: 17235344 large PDF reweighting factor: 3845280 vetoed large reweighting factor for parton: 914 Momentum fail statistics: Soft Collision : 7 fails Shower : 39 fails Fragmentation : 7 fails Hadron Decay : 727 fails Decay channel kinematics max fail statistics: B --> D*(2007) D+b K+ pi maximal fail by 1.90797. B --> D*(2007) Db K+ pi+b maximal fail by 2.23738. B --> D*(2010)+ D*(2010)+b K pi maximal fail by 1.65784. B+ --> Db vmu mu+ maximal fail by 1.30504. D --> Kb pi+ pi+b pi maximal fail by 1.36126. Perturbative Interface (Matrix Elements): momentum failures: 58 amplitude failures: 4 Decay_Handler_Base::~Decay_Handler_Base with 2 particles not on their mass shell. WARNING: Some settings that have been defined in the input files and/or the command line have not been used. The following top-level settings have not been used or include subsettings that have not been used: - Sherpa.yaml: ANALYISI_OUTPUT For more details, inspect the Settings Report: Run `make` within the Settings_Report directory (requires `pandoc` to be installed), then open 'Settings_Report.html' with your browser. ┌──────────────────────────────────────────────────────────┐ │ Please cite the publications listed in 'References.tex'. │ └──────────────────────────────────────────────────────────┘ Time: 1h 10m 27s on Tue Nov 5 19:07:28 2024 (User: 1h 9m 40s, System: 2s, Children User: 0s, Children System: 0s) Welcome to Sherpa, Daniel Reichelt on ip3-cpu1.phyip3.dur.ac.uk. Initialization of framework underway ... Local time: Tue Nov 5 20:19:00 2024 Seed mode: '*' Memory limit: 502.838 GB Seed: 3045 ┌──────────────────────────────────────────────────────────────────────────────┐ │  ._ │ │  .-#. │ │  .--+@. . │ │  .----@@. +#- │ │  .-----+@@. +**@- SHERPA v3.0.1 (Erebus) │ │  :- .-------@@@+***#@- │ │  :=#* .--------+@+*****@@- Monte Carlo event generator │ │  :===@* .----------+******#@@- │ │  :====#@*----------+********@@@- https://sherpa-team.gitlab.io │ │  :======@@*--------+*********#@@@- │ │ │ │ Authors: Enrico Bothmann, Lois Flower, Christian Gutschow, │ │ Stefan Hoeche, Mareen Hoppe, Joshua Isaacson, │ │ Max Knobbe, Frank Krauss, Peter Meinzinger, │ │ Davide Napoletano, Alan Price, Daniel Reichelt, │ │ Marek Schoenherr, Steffen Schumann, Frank Siegert │ │ Former Authors: Gurpreet Singh Chahal, Timo Fischer, Tanju Gleisberg, │ │ Hendrik Hoeth, Johannes Krause, Silvan Kuttimalai, │ │ Ralf Kuhn, Thomas Laubrich, Sebastian Liebschner, │ │ Andreas Schaelicke, Holger Schulz, Jan Winter │ │ │ │ Users are kindly asked to cite SciPost Phys 7 (2019) 3, 034. │ │ │ │ This program uses a lot of genuine and original research work by others. │ │ Users are encouraged to also cite the various original publications. │ │ │ └──────────────────────────────────────────────────────────────────────────────┘ Git branch: rel-3-0-x Revision: 9b5228107c78210a21d3593aa2fb906c83f2587c. Initializing hadron particle information ... Initializing beam spectra ... Type: Collider Setup Beam 1: P+ (enabled = 0, momentum = (6500,0,0,6500)) Beam 2: P+ (enabled = 0, momentum = (6500,0,0,-6500)) Initializing PDFs ... Hard scattering: PDF4LHC21_40_pdfas + PDF4LHC21_40_pdfas MPI: PDF4LHC21_40_pdfas + PDF4LHC21_40_pdfas Fixed electroweak parameters Input scheme: Gmu scheme, input: GF, m_W, m_Z, m_h, widths Ren. scheme: Gmu Parameters: sin^2(\theta_W) = 0.223043 - 0.00110541 i vev = 246.218 Set \alpha according to EW scheme 1/\alpha(0) = 137.036 1/\alpha(def) = 132.119 Particle data: ┌─────────────────────────────────────────────────────────────────────────────────────────┐ │ Name Kf-code Mass Width Stable Massive Active Yukawa │ ├─────────────────────────────────────────────────────────────────────────────────────────┤ │ d 1 0.01 0 1 0 1 0 │ │ u 2 0.005 0 1 0 1 0 │ │ s 3 0.2 0 1 0 1 0 │ │ c 4 1.42 0 1 0 1 0 │ │ b 5 4.92 0 1 0 1 0 │ │ t 6 172.5 1.32 0 1 1 172.5 │ │ e- 11 0.000511 0 1 0 1 0 │ │ ve 12 0 0 1 0 1 0 │ │ mu- 13 0.105 0 1 0 1 0 │ │ vmu 14 0 0 1 0 1 0 │ │ tau- 15 1.777 2.26735e-12 0 0 1 0 │ │ vtau 16 0 0 1 0 1 0 │ │ G 21 0 0 1 0 1 0 │ │ P 22 0 0 1 0 1 0 │ │ Z 23 91.1876 2.4952 0 1 1 91.1876 │ │ W+ 24 80.379 2.085 0 1 1 80.379 │ │ h0 25 125.09 0.0041 0 1 1 125.09 │ │ Instanton 999 0 0 0 0 1 0 │ └─────────────────────────────────────────────────────────────────────────────────────────┘ Particle containers: ┌─────────────────────────────────────────────────────────────────────────────────────────┐ │ Name Kf-code Constituents │ ├─────────────────────────────────────────────────────────────────────────────────────────┤ │ l 90 e-, e+, mu-, mu+, tau-, tau+ │ │ v 91 ve, veb, vmu, vmub, vtau, vtaub │ │ f 92 d, db, u, ub, s, sb, c, cb, b, bb, e-, e+, mu-, mu+, │ │ tau-, tau+, ve, veb, vmu, vmub, vtau, vtaub │ │ j 93 d, db, u, ub, s, sb, c, cb, b, bb, G │ │ Q 94 d, db, u, ub, s, sb, c, cb, b, bb │ │ ewj 98 d, db, u, ub, s, sb, c, cb, b, bb, G, P │ └─────────────────────────────────────────────────────────────────────────────────────────┘ Initializing primordial transverse momentum ... Initializing remnants ... Hard process: P+ (Hadron) + P+ (Hadron) Initializing showers ... Initializing matrix elements for the hard processes ... Initializing Comix ... Massive PS flavours for Comix: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Massive PS flavours for Amegic: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Massive PS flavours for Internal: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Building processes (3 ME generators, 1 process blocks) ... Setting up processes ............ done (161 MB, 0s/0s) Performing tests ............ done (161 MB, 0s/0s) Initializing scales done (161 MB, 0s/0s) Initializing the beam remnants ... Massive PS flavours for Amisic: (c,cb,b,bb,e-,e+,mu-,mu+,tau-,tau+) Multiple interactions initialized id = 2, name = Amisic, type = 1 Underlying event/multiple interactions initialized MI[2]: on = 1 (type = 1, Amisic) Soft-collision handlers: Type[2]: None Initializing hadron particle information ... Initialized fragmentation Initialized hadron decays (model = HADRONS++) Initialized soft photons Initialized on-the-fly reweighting ISR_Channels::CheckForStructuresFromME for 0: (none) Read in channels from directory: Results/Comix/MC_2_2__j__j__j__j Calculating xs for '2_2__j__j__j__j' (Comix) ... 2_2__j__j__j__j : 1.25823e+08 pb +- ( 643740 pb = 0.511624 % )  exp. eff: 2.44305e-07 % reduce max for 2_2__j__j__j__j to 0.0301605 ( eps = 0.001 -> exp. eff 8.10017e-08 ) ┌──────────────────────────────────────────────────────────────────────────────┐ │ SHERPA generates events with the following structure: │ │ Event generation Weighted │ │ Perturbative Signal_Processes │ │ Perturbative Minimum_Bias: None │ │ Perturbative Hard_Decays │ │ Perturbative Jet_Evolution:CSS │ │ Perturbative Lepton_FS_QED_Corrections:Photons │ │ Perturbative Multiple_Interactions: Amisic │ │ Hadronization Beam_Remnants: Parametrised │ │ Hadronization Hadronization: Ahadic │ │ Hadronization Hadron_Decays │ │ Userhook None │ │ Analysis Rivet │ │ Reweighting 7 variations │ └──────────────────────────────────────────────────────────────────────────────┘ #-------------------------------------------------------------------------- # FastJet release 3.3.2 [fjcore] # M. Cacciari, G.P. Salam and G. Soyez # A software package for jet finding and analysis at colliders # http://fastjet.fr # # Please cite EPJC72(2012)1896 [arXiv:1111.6097] if you use this package # for scientific work and optionally PLB641(2006)57 [hep-ph/0512210]. # # FastJet is provided without warranty under the terms of the GNU GPLv2. # It uses T. Chan's closest pair algorithm, S. Fortune's Voronoi code # and 3rd party plugin jet algorithms. See COPYING file for details. #-------------------------------------------------------------------------- Event 1 ( 10s elapsed / 11d 17h 6m 29s left ) -> ETA: Sun Nov 17 13:25 XS = 2420.49 pb +- ( 2420.49 pb = 100 % ) Event 2 ( 10s elapsed / 5d 21h 23m 9s left ) -> ETA: Mon Nov 11 17:42 XS = 120781 pb +- ( 119573 pb = 98 % ) Event 3 ( 10s elapsed / 3d 22h 32m 3s left ) -> ETA: Sat Nov 09 18:51 XS = 171732 pb +- ( 98715.7 pb = 57 % ) Event 4 ( 10s elapsed / 2d 23h 18m 59s left ) -> ETA: Fri Nov 08 19:38 XS = 137534 pb +- ( 83763.5 pb = 60 % ) Event 5 ( 10s elapsed / 2d 9h 23m 9s left ) -> ETA: Fri Nov 08 05:42 XS = 114817 pb +- ( 72066.7 pb = 62 % ) Event 6 ( 10s elapsed / 1d 23h 57m 36s left ) -> ETA: Thu Nov 07 20:16 XS = 98420.8 pb +- ( 63075.9 pb = 64 % ) Event 7 ( 10s elapsed / 1d 17h 13m 38s left ) -> ETA: Thu Nov 07 13:32 XS = 8.15454e+07 pb +- ( 8.1447e+07 pb = 99 % ) Event 8 ( 10s elapsed / 1d 12h 12m 44s left ) -> ETA: Thu Nov 07 08:31 XS = 7.25249e+07 pb +- ( 7.23937e+07 pb = 99 % ) Event 9 ( 10s elapsed / 1d 8h 16m 51s left ) -> ETA: Thu Nov 07 04:36 XS = 6.53495e+07 pb +- ( 6.51472e+07 pb = 99 % ) Event 10 ( 10s elapsed / 1d 5h 8m 9s left ) -> ETA: Thu Nov 07 01:27 XS = 5.44583e+07 pb +- ( 5.42924e+07 pb = 99 % ) Event 20 ( 10s elapsed / 15h 4m 49s left ) -> ETA: Wed Nov 06 11:24 XS = 2.46432e+07 pb +- ( 2.24748e+07 pb = 91 % ) Event 30 ( 11s elapsed / 10h 25m 55s left ) -> ETA: Wed Nov 06 06:45 XS = 7.83524e+07 pb +- ( 5.30587e+07 pb = 67 % ) Event 40 ( 11s elapsed / 8h 3m 33s left ) -> ETA: Wed Nov 06 04:22 XS = 9.83889e+07 pb +- ( 4.49233e+07 pb = 45 % ) Event 50 ( 12s elapsed / 6h 42m 7s left ) -> ETA: Wed Nov 06 03:01 XS = 1.08895e+08 pb +- ( 4.58911e+07 pb = 42 % ) Event 60 ( 12s elapsed / 5h 48m 7s left ) -> ETA: Wed Nov 06 02:07 XS = 9.19222e+07 pb +- ( 3.88576e+07 pb = 42 % ) Event 70 ( 13s elapsed / 5h 9m 18s left ) -> ETA: Wed Nov 06 01:28 XS = 8.00479e+07 pb +- ( 3.36834e+07 pb = 42 % ) Event 80 ( 13s elapsed / 4h 39m 59s left ) -> ETA: Wed Nov 06 00:59 XS = 7.45974e+07 pb +- ( 3.01105e+07 pb = 40 % ) Event 90 ( 13s elapsed / 4h 16m 3s left ) -> ETA: Wed Nov 06 00:35 XS = 8.16105e+07 pb +- ( 2.84794e+07 pb = 34 % ) Event 100 ( 14s elapsed / 3h 58m 15s left ) -> ETA: Wed Nov 06 00:17 XS = 7.96838e+07 pb +- ( 2.60381e+07 pb = 32 % ) Event 200 ( 18s elapsed / 2h 35m 11s left ) -> ETA: Tue Nov 05 22:54 XS = 9.04081e+07 pb +- ( 2.40362e+07 pb = 26 % ) Event 300 ( 23s elapsed / 2h 8m 3s left ) -> ETA: Tue Nov 05 22:27 XS = 7.45325e+07 pb +- ( 1.65373e+07 pb = 22 % ) Event 400 ( 27s elapsed / 1h 53m left ) -> ETA: Tue Nov 05 22:12 XS = 8.92151e+07 pb +- ( 1.81947e+07 pb = 20 % ) Event 500 ( 31s elapsed / 1h 44m 50s left ) -> ETA: Tue Nov 05 22:04 XS = 1.14245e+08 pb +- ( 2.05538e+07 pb = 17 % ) Event 600 ( 36s elapsed / 1h 39m 33s left ) -> ETA: Tue Nov 05 21:59 XS = 1.13235e+08 pb +- ( 1.77848e+07 pb = 15 % ) Event 700 ( 40s elapsed / 1h 36m 15s left ) -> ETA: Tue Nov 05 21:55 XS = 1.13898e+08 pb +- ( 1.64338e+07 pb = 14 % ) Event 800 ( 45s elapsed / 1h 33m 14s left ) -> ETA: Tue Nov 05 21:53 XS = 1.16168e+08 pb +- ( 1.59632e+07 pb = 13 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.0843484,3.0809e-05,-5.02482e-05,0.0738431) (1) Blob_List::FourMomentumConservation throws four momentum error for Shower : (0.0260983,-1.05585e-05,8.20539e-06,-0.031837) (1) Blob_List::FourMomentumConservation throws four momentum error for Shower : (-0.0654821,-3.99797e-06,-1.15221e-05,-0.0111079) (2) Blob_List::FourMomentumConservation throws four momentum error for Shower : (-0.0402987,-5.55756e-06,1.21972e-05,0.00108652) (3) Blob_List::FourMomentumConservation throws four momentum error for Shower : (0.0104211,-1.21379e-06,4.82224e-06,0.0120744) (4) Blob_List::FourMomentumConservation throws four momentum error for Shower : (-0.106448,0.0276261,-0.00593042,-0.218259) (5) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (-4.80931e-07,-4.79132e-10,6.76024e-10,-6.71901e-08) (1) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (-4.96925e-10,-1.35605e-12,-8.04257e-12,4.96861e-10) (1) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (-3.66143e-11,2.53103e-13,2.77611e-13,-3.66214e-11) (2) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (-4.23306e-11,6.25722e-13,1.59506e-12,4.23128e-11) (3) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (6.90576e-11,-2.10443e-13,2.32203e-13,-6.90505e-11) (4) Blob_List::FourMomentumConservation throws four momentum error for Hadron Decay : (2.66525e-11,-4.22828e-13,2.41696e-13,2.664e-11) (5) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 900 ( 49s elapsed / 1h 30m 39s left ) -> ETA: Tue Nov 05 21:50 XS = 1.11944e+08 pb +- ( 1.45542e+07 pb = 13 % ) Event 1000 ( 53s elapsed / 1h 28m 14s left ) -> ETA: Tue Nov 05 21:48 XS = 1.16462e+08 pb +- ( 1.57276e+07 pb = 13 % ) Event 2000 ( 1m 37s elapsed / 1h 19m 35s left ) -> ETA: Tue Nov 05 21:40 XS = 1.07275e+08 pb +- ( 1.16064e+07 pb = 10 % ) Event 3000 ( 2m 24s elapsed / 1h 17m 42s left ) -> ETA: Tue Nov 05 21:39 XS = 1.07061e+08 pb +- ( 9.05045e+06 pb = 8 % ) Decay_Handler_Base::TreatInitialBlob:("Initial particle Delta(1232)++b not onshell: sqrt|p^2|=1.232 vs. m=1.232") Event 4000 ( 3m 9s elapsed / 1h 15m 42s left ) -> ETA: Tue Nov 05 21:37 XS = 1.13831e+08 pb +- ( 7.99576e+06 pb = 7 % ) Event 5000 ( 3m 55s elapsed / 1h 14m 28s left ) -> ETA: Tue Nov 05 21:37 XS = 1.14932e+08 pb +- ( 7.33636e+06 pb = 6 % ) Event 6000 ( 4m 41s elapsed / 1h 13m 24s left ) -> ETA: Tue Nov 05 21:37 XS = 1.14794e+08 pb +- ( 6.86333e+06 pb = 5 % ) Event 7000 ( 5m 26s elapsed / 1h 12m 13s left ) -> ETA: Tue Nov 05 21:36 XS = 1.20698e+08 pb +- ( 6.53133e+06 pb = 5 % ) Event 8000 ( 6m 11s elapsed / 1h 11m 8s left ) -> ETA: Tue Nov 05 21:36 XS = 1.22496e+08 pb +- ( 6.33214e+06 pb = 5 % ) Event 9000 ( 6m 56s elapsed / 1h 10m 14s left ) -> ETA: Tue Nov 05 21:36 XS = 1.2297e+08 pb +- ( 6.01552e+06 pb = 4 % ) Event 10000 ( 7m 42s elapsed / 1h 9m 24s left ) -> ETA: Tue Nov 05 21:36 XS = 1.22205e+08 pb +- ( 5.64449e+06 pb = 4 % ) Event 20000 ( 15m 34s elapsed / 1h 2m 19s left ) -> ETA: Tue Nov 05 21:36 XS = 1.22449e+08 pb +- ( 4.02384e+06 pb = 3 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.148417,-7.34777e-05,5.21806e-06,0.0396067) (2) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (7.8356e-07,-6.60014e-10,3.67943e-09,-9.93879e-07) (2) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 30000 ( 23m 16s elapsed / 54m 18s left ) -> ETA: Tue Nov 05 21:36 XS = 1.22769e+08 pb +- ( 3.27196e+06 pb = 2 % ) Event 40000 ( 30m 58s elapsed / 46m 27s left ) -> ETA: Tue Nov 05 21:36 XS = 1.23293e+08 pb +- ( 2.85837e+06 pb = 2 % ) Decay_Handler_Base::TreatInitialBlob:("Initial particle Delta(1232)++ not onshell: sqrt|p^2|=1.232 vs. m=1.232") Event 50000 ( 38m 43s elapsed / 38m 43s left ) -> ETA: Tue Nov 05 21:36 XS = 1.22025e+08 pb +- ( 2.50209e+06 pb = 2 % ) Event 60000 ( 46m 40s elapsed / 31m 6s left ) -> ETA: Tue Nov 05 21:36 XS = 1.23619e+08 pb +- ( 2.35062e+06 pb = 1 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.12482,-1.13281e-05,-8.87258e-05,-0.117387) (3) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (-5.77711e-08,6.7331e-10,1.51016e-10,-1.4295e-07) (3) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.00931744,4.10935e-07,1.36958e-06,-0.0052616) (4) Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (1.77671e-07,1.47233e-10,-1.22804e-10,1.29151e-07) (4) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 70000 ( 54m 32s elapsed / 23m 22s left ) -> ETA: Tue Nov 05 21:36 XS = 1.24554e+08 pb +- ( 2.19046e+06 pb = 1 % ) Blob_List::FourMomentumConservation throws four momentum error for Soft Collision : (0.0636811,3.03402e-05,4.09899e-05,0.0453133) (5) WARNING: last allowed error message from 'FourMomentumConservation' Blob_List::FourMomentumConservation throws four momentum error for Fragmentation : (1.34335e-06,4.52149e-11,6.47179e-10,8.11764e-07) (5) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 80000 ( 1h 2m 22s elapsed / 15m 35s left ) -> ETA: Tue Nov 05 21:37 XS = 1.24174e+08 pb +- ( 2.04903e+06 pb = 1 % ) Event 90000 ( 1h 10m 14s elapsed / 7m 48s left ) -> ETA: Tue Nov 05 21:37 XS = 1.24343e+08 pb +- ( 1.93845e+06 pb = 1 % ) Event_Handler::GenerateStandardPerturbativeEvent(): Four momentum not conserved. Rejecting event. Event 100000 ( 4678 s total ) = 1.84698e+06 evts/day Summarizing the run may take some time ... ┌────────────────────────────────────────────────────────────────────────────┐ │ Nominal or variation name XS [pb] RelDev AbsErr [pb] RelErr │ ├────────────────────────────────────────────────────────────────────────────┤ │ Nominal  1.23411e+08 0 % 1.81956e+06 1.47 % │ │ ME & PS:  1.23411e+08 0 % 1.81956e+06 1.47 % │ │ ME & PS: MUF=0.5  1.07316e+08 -13.04 % 2.19769e+06 2.04 % │ │ ME & PS: MUF=2  1.34706e+08 9.15 % 2.1189e+06 1.57 % │ │ ME & PS: MUR=0.5  1.60815e+08 30.3 % 2.55609e+06 1.58 % │ │ ME & PS: MUR=0.5 MUF=0.5  1.38623e+08 12.32 % 3.00487e+06 2.16 % │ │ ME & PS: MUR=2  9.81412e+07 -20.47 % 1.4727e+06 1.5 % │ │ ME & PS: MUR=2 MUF=2  1.07443e+08 -12.93 % 1.76973e+06 1.64 % │ │ ME-only:  1.23411e+08 0 % 1.81956e+06 1.47 % │ │ ME-only: MUF=0.5  1.08277e+08 -12.26 % 1.57458e+06 1.45 % │ │ ME-only: MUF=2  1.3535e+08 9.67 % 2.02463e+06 1.49 % │ │ ME-only: MUR=0.5  1.60871e+08 30.35 % 2.38973e+06 1.48 % │ │ ME-only: MUR=0.5 MUF=0.5  1.41093e+08 14.32 % 2.06806e+06 1.46 % │ │ ME-only: MUR=2  9.78333e+07 -20.72 % 1.4341e+06 1.46 % │ │ ME-only: MUR=2 MUF=2  1.07277e+08 -13.07 % 1.59576e+06 1.48 % │ └────────────────────────────────────────────────────────────────────────────┘ Event generation statistics: Generated events: 100000 New events: From "Beam_Remnants: Parametrised": 1758 (101767) -> 1.7 % From "Jet_Evolution:CSS": 63 (561103) -> 0 % Retried events: From "Hadron_Decays": 2 (123422) -> 0 % Retried phases: From "Hadron_Decay_Handler::RejectExclusiveChannelsFromFragmentation": 10076 (0) Retried methods: From "Decay_Channel::GenerateKinematics": 1165 (27466911) -> 0 % Reweighting statistics: different PDF cut-off: 17235344 large PDF reweighting factor: 3845280 vetoed large reweighting factor for parton: 914 Momentum fail statistics: Soft Collision : 7 fails Shower : 39 fails Fragmentation : 7 fails Hadron Decay : 727 fails Decay channel kinematics max fail statistics: B --> D*(2007) D+b K+ pi maximal fail by 1.90797. B --> D*(2007) Db K+ pi+b maximal fail by 2.23738. B --> D*(2010)+ D*(2010)+b K pi maximal fail by 1.65784. B+ --> Db vmu mu+ maximal fail by 1.30504. D --> Kb pi+ pi+b pi maximal fail by 1.36126. Perturbative Interface (Matrix Elements): momentum failures: 58 amplitude failures: 4 Decay_Handler_Base::~Decay_Handler_Base with 2 particles not on their mass shell. ┌──────────────────────────────────────────────────────────┐ │ Please cite the publications listed in 'References.tex'. │ └──────────────────────────────────────────────────────────┘ Time: 1h 18m 10s on Tue Nov 5 21:37:10 2024 (User: 1h 17m 16s, System: 4s, Children User: 0s, Children System: 0s)