Welcome to Sherpa, Daniel Reichelt on ip3-cpu2.phyip3.dur.ac.uk. Initialization of framework underway ... Local time: Fri Jan 24 14:04:00 2025 Seed mode: '*' Memory limit: 502.838 GB Seed: 1354 ┌──────────────────────────────────────────────────────────────────────────────┐ │ [32m .[0m_ │ │ [32m .-[0m#. │ │ [32m .--[0m+@. . │ │ [32m .----[0m@@.[31m +[0m#- │ │ [32m .-----[0m+@@.[31m +**[0m@- SHERPA v3.1.x (Erebus) │ │ [34m :[0m-[32m .-------[0m@@@[31m+***[0m#@- │ │ [34m :=[0m#*[32m .--------[0m+@[31m+*****[0m@@- Monte Carlo event generator │ │ [34m :===[0m@*[32m .----------[31m+******[0m#@@- │ │ [34m :====[0m#@*[32m----------[31m+********[0m@@@- https://sherpa-team.gitlab.io │ │ [34m :======[0m@@*[32m--------[31m+*********[0m#@@@- │ │ │ │ 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 [1mSciPost Phys 7 (2019) 3, 034[0m. │ │ │ │ This program uses a lot of genuine and original research work by others. │ │ Users are encouraged to also cite the various original publications. │ │ │ └──────────────────────────────────────────────────────────────────────────────┘ [1m[33mWARNING[0m: You are using an unsupported development branch. Git branch: master Revision: bbdb0a3424e31c55cb7d4b228e23d79fce6682a7. -> CSSHOWER++/Calculators has local modifications: 4bc13e170c26ca5801c20bccc1055904 -> CSSHOWER++/Showers has local modifications: a109c7fbf0673af17f111093a5ee6d42 Initializing hadron particle information ... Initializing beam spectra ... Type: Collider Setup Beam 1: P+ (enabled = 0, momentum = (6800,0,0,6800)) Beam 2: P+ (enabled = 0, momentum = (6800,0,0,-6800)) 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 = 246.22 Set \alpha according to EW scheme 1/\alpha(0) = 137.036 1/\alpha(def) = 132.12 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 0 0 1 1 125 │ │ 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 │ └─────────────────────────────────────────────────────────────────────────────────────────┘ Reading in parameters for P+ yields: Primordial k_T Form = None Primordial k_T Recoil = Beam_vs_Shower Matter Form = Single_Gaussian BEAM_SPECTATOR_KTEXPO = 5 BEAM_SPECTATOR_KTMAX = 1 BEAM_SPECTATOR_MEAN = 0 BEAM_SPECTATOR_Q2 = 0.77 BEAM_SPECTATOR_SIGMA = 0.25 ENERGY_SCALING_EXPO = 0.08 MATTER_FRACTION_1 = 1 MATTER_RADIUS_1 = 0.86 MATTER_RADIUS_2 = 0 REFERENCE_ENERGY = 7000 SHOWER_INITIATOR_KTEXPO = 5.12 SHOWER_INITIATOR_KTMAX = 2.7 SHOWER_INITIATOR_MEAN = 1 SHOWER_INITIATOR_Q2 = 0.77 SHOWER_INITIATOR_SIGMA = 1.1 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 (220 MB, 10s/10s) Performing tests Amplitude::GaugeTest(): Large deviation { 1.71071396715e-20 vs 1.71071396714e-20 => 7.55417950415e-12 } . Amplitude::GaugeTest(): Large deviation { 8.50219344868e-20 vs 8.50219344866e-20 => 2.21156426505e-12 } ........ Amplitude::GaugeTest(): Large deviation { 1.16353701956e-20 vs 1.16353701956e-20 => -2.17859064122e-12 } ..... Amplitude::GaugeTest(): Large deviation { 1.036531659e-21 vs 1.036531659e-21 => -2.54307686021e-12 } ..... Amplitude::GaugeTest(): Large deviation { 2.09260520271e-22 vs 2.09260520272e-22 => -2.51021425868e-12 } ... Amplitude::GaugeTest(): Large deviation { 1.0077891581e-20 vs 1.00778915811e-20 => -2.11419770579e-12 } ...[31mWARNING: last allowed error message from 'GaugeTest' [0m Amplitude::GaugeTest(): Large deviation { 6.61712467373e-25 vs 6.61712467371e-25 => 2.01949568179e-12 } ............................................................................................... done (220 MB, 0s/0s) Initializing scales........................................................................ done (222 MB, 0s/0s) Initializing the beam remnants ... Multiple interactions initialized id = 2, name = None, type = 0 Underlying event/multiple interactions initialized MI[2]: on = 0 (type = 0, None) Initialized fragmentation Initialized soft photons Initialized on-the-fly reweighting ===> AddOns/Rivet has local modifications df7736c863ac2b9155db51c777b9f0c4 <=== ISR_Channels::CheckForStructuresFromME for 0: (none) Read in channels from directory: Results/Amegic/MC_2_3__j__j__h0__j__j__QCD(BVI) Calculating xs for '2_3__j__j__h0__j__j__QCD(BVI)' (Amegic+Internal) ... [1m2_3__j__j__h0__j__j__QCD(BVI)[0m : [34m[1m4.44859542077 pb[0m +- ( [31m0.027219265114 pb = 0.611862004509 %[0m ) [1m exp. eff: [31m0.279731685346 %[0m Read in channels from directory: Results/Comix/MC_2_4__j__j__h0__j__j__j__QCD(RS) Calculating xs for '2_4__j__j__h0__j__j__j__QCD(RS)' (Comix) ... [1m2_4__j__j__h0__j__j__j__QCD(RS)[0m : [34m[1m-0.1322542281 pb[0m +- ( [31m0.0553832787777 pb = 41.8763767127 %[0m ) [1m exp. eff: [31m0.00152658759413 %[0m reduce max for 2_3__j__j__h0__j__j__QCD(BVI) to 1 ( eps = 0.001 -> exp. eff 0.00279731685346 ) reduce max for 2_4__j__j__h0__j__j__j__QCD(RS) to 1 ( eps = 0.001 -> exp. eff 1.52658759413e-05 ) ┌──────────────────────────────────────────────────────────────────────────────┐ │ [1m[32mSHERPA generates events with the following structure:[0m │ │ 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: None │ │ Hadronization Beam_Remnants:Parametrised │ │ Hadronization Hadronization: None │ │ Hadronization Hadron_Decays │ │ Userhook None │ │ Analysis Rivet │ │ Reweighting 6 variations │ └──────────────────────────────────────────────────────────────────────────────┘ Event 1 ( 0s elapsed / 9d 22h 53m 19s left ) -> ETA: Mon Feb 03 12:57 XS = 8.20292988743e-12 pb +- ( 8.20292988743e-12 pb = 100 % ) Event 2 ( 0s elapsed / 4d 23h 26m 39s left ) -> ETA: Wed Jan 29 13:30 XS = -0.0722606840919 pb +- ( 0.0722606841001 pb = -100 % ) Event 3 ( 0s elapsed / 3d 8h 33m 19s left ) -> ETA: Mon Jan 27 22:37 XS = -0.477248163634 pb +- ( 0.408198066898 pb = -85 % ) Event 4 ( 0s elapsed / 2d 12h 24m 59s left ) -> ETA: Mon Jan 27 02:29 XS = -0.381798530858 pb +- ( 0.330281742591 pb = -86 % ) Event 5 ( 0s elapsed / 2d 19m 59s left ) -> ETA: Sun Jan 26 14:24 XS = -0.318165430949 pb +- ( 0.27707975578 pb = -87 % ) Event 6 ( 0s elapsed / 1d 16h 44m 25s left ) -> ETA: Sun Jan 26 06:48 XS = 14.9862854874 pb +- ( 15.3062423836 pb = 102 % ) Event 7 ( 0s elapsed / 1d 10h 55m 13s left ) -> ETA: Sun Jan 26 00:59 XS = 13.1129998015 pb +- ( 13.3873070926 pb = 102 % ) Event 8 ( 0s elapsed / 1d 6h 54m 9s left ) -> ETA: Sat Jan 25 20:58 XS = 13.0781491917 pb +- ( 11.8065465335 pb = 90 % ) Event 9 ( 0s elapsed / 1d 3h 28m 7s left ) -> ETA: Sat Jan 25 17:32 XS = 11.7703342726 pb +- ( 10.6407712456 pb = 90 % ) Event 10 ( 0s elapsed / 1d 59m 59s left ) -> ETA: Sat Jan 25 15:04 XS = 8.12624447841 pb +- ( 10.2916886547 pb = 126 % ) Event 20 ( 0s elapsed / 13h 3m 19s left ) -> ETA: Sat Jan 25 03:07 XS = 4.23046551691 pb +- ( 4.48415691817 pb = 105 % ) Event 30 ( 0s elapsed / 8h 58m 52s left ) -> ETA: Fri Jan 24 23:03 XS = 4.21818224804 pb +- ( 3.24789637474 pb = 76 % ) Event 40 ( 1s elapsed / 7h 48s left ) -> ETA: Fri Jan 24 21:05 XS = 3.4591718294 pb +- ( 2.52852677552 pb = 73 % ) Event 50 ( 1s elapsed / 5h 53m 18s left ) -> ETA: Fri Jan 24 19:57 XS = 4.9222413271 pb +- ( 2.46503497566 pb = 50 % ) Event 60 ( 1s elapsed / 5h 5m 32s left ) -> ETA: Fri Jan 24 19:09 XS = 6.71557602359 pb +- ( 2.76978775832 pb = 41 % ) Event 70 ( 1s elapsed / 4h 31m 24s left ) -> ETA: Fri Jan 24 18:35 XS = 6.64029501352 pb +- ( 2.46931031684 pb = 37 % ) Event 80 ( 1s elapsed / 4h 5m 48s left ) -> ETA: Fri Jan 24 18:10 XS = 5.91026844943 pb +- ( 2.18319231441 pb = 36 % ) Event 90 ( 1s elapsed / 3h 44m 3s left ) -> ETA: Fri Jan 24 17:48 XS = 5.35385445881 pb +- ( 1.95655773575 pb = 36 % ) Event 100 ( 1s elapsed / 3h 28m 18s left ) -> ETA: Fri Jan 24 17:32 XS = 4.82044044636 pb +- ( 1.75776738805 pb = 36 % ) Event 200 ( 1s elapsed / 2h 13m 18s left ) -> ETA: Fri Jan 24 16:17 XS = 3.84739296236 pb +- ( 1.02522208133 pb = 26 % ) Event 300 ( 2s elapsed / 1h 53m 17s left ) -> ETA: Fri Jan 24 15:57 XS = 3.59554850427 pb +- ( 0.896515452447 pb = 24 % ) Event 400 ( 2s elapsed / 1h 42m 52s left ) -> ETA: Fri Jan 24 15:47 XS = 3.4912164679 pb +- ( 0.717768093987 pb = 20 % ) Event 500 ( 2s elapsed / 1h 37m 17s left ) -> ETA: Fri Jan 24 15:41 XS = 4.33234526467 pb +- ( 0.970245006876 pb = 22 % ) Event 600 ( 3s elapsed / 1h 32m 43s left ) -> ETA: Fri Jan 24 15:36 XS = 4.22046864097 pb +- ( 0.837380937094 pb = 19 % ) Event 700 ( 3s elapsed / 1h 29m 41s left ) -> ETA: Fri Jan 24 15:33 XS = 4.37938385772 pb +- ( 0.776461434236 pb = 17 % ) Event 800 ( 4s elapsed / 1h 26m 35s left ) -> ETA: Fri Jan 24 15:30 XS = 4.43313928655 pb +- ( 0.712363758774 pb = 16 % ) Event 900 ( 4s elapsed / 1h 24m 11s left ) -> ETA: Fri Jan 24 15:28 XS = 4.59369798811 pb +- ( 0.682991005173 pb = 14 % ) Event 1000 ( 4s elapsed / 1h 22m 45s left ) -> ETA: Fri Jan 24 15:27 XS = 4.60477224074 pb +- ( 0.643035990036 pb = 13 % ) Event 2000 ( 9s elapsed / 1h 17m 15s left ) -> ETA: Fri Jan 24 15:21 XS = 4.70301912463 pb +- ( 0.529688873296 pb = 11 % ) Event 3000 ( 13s elapsed / 1h 14m 29s left ) -> ETA: Fri Jan 24 15:18 XS = 4.55514054898 pb +- ( 0.399332004585 pb = 8 % ) Event 4000 ( 17s elapsed / 1h 13m 27s left ) -> ETA: Fri Jan 24 15:17 XS = 4.57552983964 pb +- ( 0.348349044327 pb = 7 % ) Event 5000 ( 21s elapsed / 1h 12m 46s left ) -> ETA: Fri Jan 24 15:17 XS = 4.91728622777 pb +- ( 0.337854783483 pb = 6 % ) Event 6000 ( 26s elapsed / 1h 12m 10s left ) -> ETA: Fri Jan 24 15:16 XS = 4.76683960147 pb +- ( 0.298354840879 pb = 6 % ) Event 7000 ( 30s elapsed / 1h 11m 46s left ) -> ETA: Fri Jan 24 15:16 XS = 4.69755939488 pb +- ( 0.326418509668 pb = 6 % ) Event 8000 ( 34s elapsed / 1h 11m 27s left ) -> ETA: Fri Jan 24 15:16 XS = 4.8611711464 pb +- ( 0.324126934747 pb = 6 % ) Event 9000 ( 38s elapsed / 1h 11m 15s left ) -> ETA: Fri Jan 24 15:16 XS = 4.81420139437 pb +- ( 0.300459515166 pb = 6 % ) Event 10000 ( 43s elapsed / 1h 11m 7s left ) -> ETA: Fri Jan 24 15:16 XS = 4.67698995789 pb +- ( 0.289910514569 pb = 6 % ) Event 20000 ( 1m 25s elapsed / 1h 10m left ) -> ETA: Fri Jan 24 15:15 XS = 4.77161297825 pb +- ( 0.206869581799 pb = 4 % ) Event 30000 ( 2m 8s elapsed / 1h 9m 26s left ) -> ETA: Fri Jan 24 15:15 XS = 4.55268077937 pb +- ( 0.171069309772 pb = 3 % ) Event 40000 ( 2m 51s elapsed / 1h 8m 45s left ) -> ETA: Fri Jan 24 15:15 XS = 4.5895297153 pb +- ( 0.164441004273 pb = 3 % ) Event 50000 ( 3m 34s elapsed / 1h 8m 4s left ) -> ETA: Fri Jan 24 15:15 XS = 4.47173419257 pb +- ( 0.14469331064 pb = 3 % ) Event 60000 ( 4m 18s elapsed / 1h 7m 27s left ) -> ETA: Fri Jan 24 15:15 XS = 4.45590886112 pb +- ( 0.136564004686 pb = 3 % ) Event 70000 ( 5m 2s elapsed / 1h 6m 54s left ) -> ETA: Fri Jan 24 15:16 XS = 4.45697149686 pb +- ( 0.12540371758 pb = 2 % ) Event 80000 ( 5m 45s elapsed / 1h 6m 14s left ) -> ETA: Fri Jan 24 15:16 XS = 4.50794276828 pb +- ( 0.115371507294 pb = 2 % ) Event 90000 ( 6m 29s elapsed / 1h 5m 38s left ) -> ETA: Fri Jan 24 15:16 XS = 4.41840172041 pb +- ( 0.113940805461 pb = 2 % ) Event 100000 ( 7m 12s elapsed / 1h 4m 56s left ) -> ETA: Fri Jan 24 15:16 XS = 4.40253968133 pb +- ( 0.105915382454 pb = 2 % ) Event 200000 ( 14m 30s elapsed / 58m 1s left ) -> ETA: Fri Jan 24 15:16 XS = 4.4653914103 pb +- ( 0.0758085578644 pb = 1 % ) Event 300000 ( 21m 49s elapsed / 50m 56s left ) -> ETA: Fri Jan 24 15:16 XS = 4.45419499574 pb +- ( 0.0609004042053 pb = 1 % ) Event 400000 ( 29m 9s elapsed / 43m 44s left ) -> ETA: Fri Jan 24 15:17 XS = 4.43761495722 pb +- ( 0.0544428611911 pb = 1 % ) [34mEvent_Handler::GenerateStandardPerturbativeEvent[0m:([32m"Invalid weight w=nan. Rejecting event."[0m) Event 500000 ( 36m 31s elapsed / 36m 31s left ) -> ETA: Fri Jan 24 15:17 XS = 4.41166530917 pb +- ( 0.0507773844381 pb = 1 % ) Event 600000 ( 43m 53s elapsed / 29m 15s left ) -> ETA: Fri Jan 24 15:17 XS = 4.37546137655 pb +- ( 0.0473442298938 pb = 1 % ) Event 700000 ( 51m 15s elapsed / 21m 57s left ) -> ETA: Fri Jan 24 15:17 XS = 4.3829498551 pb +- ( 0.047404755499 pb = 1 % ) Event 800000 ( 58m 37s elapsed / 14m 39s left ) -> ETA: Fri Jan 24 15:17 XS = 4.4307936447 pb +- ( 0.0650278226755 pb = 1 % ) Event 900000 ( 1h 6m 2s elapsed / 7m 20s left ) -> ETA: Fri Jan 24 15:17 XS = 4.44684421569 pb +- ( 0.0612177959653 pb = 1 % ) Event 1000000 ( 4384 s total ) = 19708119.1064 evts/day Summarizing the run may take some time ... ┌────────────────────────────────────────────────────────────────────────────┐ │ Nominal or variation name XS [pb] RelDev AbsErr [pb] RelErr │ ├────────────────────────────────────────────────────────────────────────────┤ │ [1mNominal [0m[34m[1m 4.44925[0m[33m 0 %[31m 0.0563192 1.26 %[0m │ │ [1mME & PS: MUF=0.5 [0m[34m[1m 4.63057[0m[33m 4.07 %[31m 0.243728 5.26 %[0m │ │ [1mME & PS: MUF=2 [0m[34m[1m 4.46117[0m[33m 0.26 %[31m 0.0538507 1.2 %[0m │ │ [1mME & PS: MUR=0.5 [0m[34m[1m 4.39164[0m[33m -1.29 %[31m 0.0701875 1.59 %[0m │ │ [1mME & PS: MUR=0.5 MUF=0.5 [0m[34m[1m 4.57615[0m[33m 2.85 %[31m 0.230031 5.02 %[0m │ │ [1mME & PS: MUR=2 [0m[34m[1m 4.46734[0m[33m 0.4 %[31m 0.0524224 1.17 %[0m │ │ [1mME & PS: MUR=2 MUF=2 [0m[34m[1m 4.47186[0m[33m 0.5 %[31m 0.0514724 1.15 %[0m │ │ [1mME-only: MUF=0.5 [0m[34m[1m 4.44502[0m[33m -0.09 %[31m 0.0594918 1.33 %[0m │ │ [1mME-only: MUF=2 [0m[34m[1m 4.4728[0m[33m 0.52 %[31m 0.0536128 1.19 %[0m │ │ [1mME-only: MUR=0.5 [0m[34m[1m 4.44637[0m[33m -0.06 %[31m 0.0621232 1.39 %[0m │ │ [1mME-only: MUR=0.5 MUF=0.5 [0m[34m[1m 4.43469[0m[33m -0.32 %[31m 0.0657033 1.48 %[0m │ │ [1mME-only: MUR=2 [0m[34m[1m 4.45152[0m[33m 0.05 %[31m 0.0517154 1.16 %[0m │ │ [1mME-only: MUR=2 MUF=2 [0m[34m[1m 4.46585[0m[33m 0.37 %[31m 0.0492922 1.1 %[0m │ └────────────────────────────────────────────────────────────────────────────┘ Event generation statistics: Generated events: 1000000 New events: From "Beam_Remnants:Parametrised": 5735 (1005736) -> 0.5 % From "Jet_Evolution:CSS": 1113 (1006849) -> 0.1 % Reweighting statistics: MCatNLO different PDF cut-off: 4011362 MCatNLO large PDF reweighting factor: 28426 MCatNLOvetoed large reweighting factor for parton: 50 different PDF cut-off: 26829918 large AlphaS reweighting factor: 853166 large PDF reweighting factor: 849616 vetoed large reweighting factor for parton: 4 [31mError messages from 'GaugeTest' exceeded frequency limit: 105/20 [0mPerturbative Interface (Matrix Elements): momentum failures: 86 amplitude failures: 1027 [1m[33mWARNING[0m: You are using an unsupported development branch. ┌──────────────────────────────────────────────────────────┐ │ [1m[32mPlease cite the publications listed in 'References.tex'.[0m │ └──────────────────────────────────────────────────────────┘ Time: 1h 13m 15s on Fri Jan 24 15:17:16 2025 (User: 1h 12m 21s, System: 4s, Children User: 0s, Children System: 0s)