Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.001813/0.001813, allocations: 99.64 kB / 18.95 MB, free: 2.668 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.002451/0.002451, allocations: 212.2 kB / 22.24 MB, free: 5.258 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 1.492/1.492, allocations: 230.6 MB / 256 MB, free: 7.801 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.1-maint.12.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.1-maint.12.x/package.mo): time 3.271/3.271, allocations: 0.4892 GB / 0.7943 GB, free: 35.75 MB / 0.6231 GB " [Timeout remaining time 176] Using package Buildings with version 12.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.1-maint.12.x/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: "" <> buildModelFMU(Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain,fileNamePrefix="Buildings_12_Buildings_Controls_OBC_Utilities_PIDWithAutotuning_SystemIdentification_FirstOrderTimeDelay_BaseClasses_Validation_Gain",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain,fileNamePrefix="Buildings_12_Buildings_Controls_OBC_Utilities_PIDWithAutotuning_SystemIdentification_FirstOrderTimeDelay_BaseClasses_Validation_Gain",fmuType="me",version="2.0",platforms={"static"}) [Timeout 300] "Notification: Buildings requested package Modelica of version 4.0.0. Modelica 4.1.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002108/0.002108, allocations: 67.56 kB / 1.153 GB, free: 25.77 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.338/0.3401, allocations: 176.1 MB / 1.325 GB, free: 2.418 MB / 1.014 GB Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain): time 0.002441/0.3425, allocations: 1.126 MB / 1.326 GB, free: 1.297 MB / 1.014 GB Notification: Performance of NFInst.instExpressions: time 0.002126/0.3446, allocations: 1.513 MB / 1.328 GB, free: 15.77 MB / 1.029 GB Notification: Performance of NFInst.updateImplicitVariability: time 9.972e-05/0.3447, allocations: 0 / 1.328 GB, free: 15.77 MB / 1.029 GB Notification: Performance of NFTyping.typeComponents: time 6.083e-05/0.3448, allocations: 19.69 kB / 1.328 GB, free: 15.75 MB / 1.029 GB Notification: Performance of NFTyping.typeBindings: time 0.0001659/0.345, allocations: 63.55 kB / 1.328 GB, free: 15.69 MB / 1.029 GB Notification: Performance of NFTyping.typeClassSections: time 0.00111/0.3461, allocations: 467.7 kB / 1.328 GB, free: 15.24 MB / 1.029 GB Notification: Performance of NFFlatten.flatten: time 0.0006137/0.3467, allocations: 0.5225 MB / 1.329 GB, free: 14.72 MB / 1.029 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0001761/0.3469, allocations: 65.48 kB / 1.329 GB, free: 14.64 MB / 1.029 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0002414/0.3471, allocations: 207.5 kB / 1.329 GB, free: 14.44 MB / 1.029 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002758/0.3474, allocations: 171.2 kB / 1.329 GB, free: 14.27 MB / 1.029 GB Notification: Performance of NFPackage.collectConstants: time 8.856e-05/0.3475, allocations: 52 kB / 1.329 GB, free: 14.22 MB / 1.029 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0001261/0.3476, allocations: 64 kB / 1.329 GB, free: 14.16 MB / 1.029 GB Notification: Performance of NFScalarize.scalarize: time 6.229e-05/0.3477, allocations: 59.75 kB / 1.329 GB, free: 14.1 MB / 1.029 GB Notification: Performance of NFVerifyModel.verify: time 0.0001993/0.3479, allocations: 167.5 kB / 1.329 GB, free: 13.94 MB / 1.029 GB Notification: Performance of NFConvertDAE.convert: time 0.0006374/0.3485, allocations: 0.557 MB / 1.33 GB, free: 13.38 MB / 1.029 GB Notification: Performance of FrontEnd - DAE generated: time 3.737e-06/0.3485, allocations: 0 / 1.33 GB, free: 13.38 MB / 1.029 GB Notification: Performance of FrontEnd: time 1.072e-06/0.3485, allocations: 0 / 1.33 GB, free: 13.38 MB / 1.029 GB Notification: Performance of Transformations before backend: time 6.672e-06/0.3485, allocations: 0 / 1.33 GB, free: 13.38 MB / 1.029 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 35 * Number of variables: 35 Notification: Performance of Generate backend data structure: time 0.0009839/0.3495, allocations: 0.6333 MB / 1.331 GB, free: 12.69 MB / 1.029 GB Notification: Performance of prepare preOptimizeDAE: time 5.802e-05/0.3496, allocations: 12.03 kB / 1.331 GB, free: 12.68 MB / 1.029 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 5.463e-05/0.3496, allocations: 46.73 kB / 1.331 GB, free: 12.62 MB / 1.029 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001117/0.3497, allocations: 36.8 kB / 1.331 GB, free: 12.59 MB / 1.029 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004531/0.3502, allocations: 249.2 kB / 1.331 GB, free: 12.31 MB / 1.029 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.702e-05/0.3502, allocations: 28.31 kB / 1.331 GB, free: 12.29 MB / 1.029 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.25e-05/0.3503, allocations: 32.36 kB / 1.331 GB, free: 12.25 MB / 1.029 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.000289/0.3506, allocations: 141.6 kB / 1.331 GB, free: 12.11 MB / 1.029 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.381e-05/0.3506, allocations: 0 / 1.331 GB, free: 12.11 MB / 1.029 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.053e-05/0.3506, allocations: 7.984 kB / 1.331 GB, free: 12.1 MB / 1.029 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.384e-06/0.3506, allocations: 4 kB / 1.331 GB, free: 12.1 MB / 1.029 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0001808/0.3508, allocations: 87.97 kB / 1.331 GB, free: 12.01 MB / 1.029 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.00109/0.3519, allocations: 0.6161 MB / 1.332 GB, free: 11.35 MB / 1.029 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0003701/0.3523, allocations: 110.9 kB / 1.332 GB, free: 11.23 MB / 1.029 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001072/0.3524, allocations: 52.83 kB / 1.332 GB, free: 11.18 MB / 1.029 GB Notification: Performance of preOpt evalFunc (simulation): time 1.207e-05/0.3524, allocations: 7.922 kB / 1.332 GB, free: 11.17 MB / 1.029 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0003824/0.3528, allocations: 159.2 kB / 1.332 GB, free: 11 MB / 1.029 GB Notification: Performance of pre-optimization done (n=22): time 1.553e-06/0.3528, allocations: 0 / 1.332 GB, free: 11 MB / 1.029 GB Notification: Performance of matching and sorting (n=22): time 0.0005665/0.3533, allocations: 267.5 kB / 1.332 GB, free: 10.74 MB / 1.029 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.652e-05/0.3534, allocations: 63.39 kB / 1.332 GB, free: 10.66 MB / 1.029 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003088/0.3537, allocations: 236.9 kB / 1.333 GB, free: 10.43 MB / 1.029 GB Notification: Performance of collectPreVariables (initialization): time 6.105e-05/0.3538, allocations: 41.7 kB / 1.333 GB, free: 10.38 MB / 1.029 GB Notification: Performance of collectInitialEqns (initialization): time 0.000168/0.3539, allocations: 148.6 kB / 1.333 GB, free: 10.23 MB / 1.029 GB Notification: Performance of collectInitialBindings (initialization): time 6.748e-05/0.354, allocations: 63.47 kB / 1.333 GB, free: 10.17 MB / 1.029 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002229/0.3542, allocations: 97.89 kB / 1.333 GB, free: 10.06 MB / 1.029 GB Notification: Performance of setup shared object (initialization): time 0.0001803/0.3544, allocations: 330.8 kB / 1.333 GB, free: 9.73 MB / 1.029 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004384/0.3548, allocations: 279 kB / 1.334 GB, free: 9.434 MB / 1.029 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005026/0.3553, allocations: 365.4 kB / 1.334 GB, free: 9.016 MB / 1.029 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0005691/0.3559, allocations: 403.1 kB / 1.334 GB, free: 8.562 MB / 1.029 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.687e-06/0.3559, allocations: 0 / 1.334 GB, free: 8.562 MB / 1.029 GB Notification: Performance of matching and sorting (n=36) (initialization): time 0.001175/0.3571, allocations: 0.7175 MB / 1.335 GB, free: 7.789 MB / 1.029 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001245/0.3572, allocations: 134.8 kB / 1.335 GB, free: 7.633 MB / 1.029 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.222e-05/0.3572, allocations: 7.938 kB / 1.335 GB, free: 7.625 MB / 1.029 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.307e-05/0.3572, allocations: 4 kB / 1.335 GB, free: 7.621 MB / 1.029 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001117/0.3574, allocations: 23.92 kB / 1.335 GB, free: 7.598 MB / 1.029 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.708e-06/0.3574, allocations: 4 kB / 1.335 GB, free: 7.594 MB / 1.029 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006585/0.358, allocations: 115.9 kB / 1.335 GB, free: 7.48 MB / 1.029 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.567e-05/0.3581, allocations: 31.97 kB / 1.335 GB, free: 7.449 MB / 1.029 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 12 * Number of states: 0 () * Number of discrete variables: 17 (tunSta.y,$PRE.tunSta.y,$whenCondition9,$whenCondition7,$whenCondition8,$whenCondition5,$whenCondition6,$whenCondition3,$whenCondition4,$whenCondition1,$whenCondition2,u.booPul.y,$PRE.u.booPul.y,tOn.booPul.y,$PRE.tOn.booPul.y,tOff.booPul.y,$PRE.tOff.booPul.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (28): * Single equations (assignments): 24 * Array equations: 0 * Algorithm blocks: 4 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.000217/0.3583, allocations: 154.2 kB / 1.336 GB, free: 7.289 MB / 1.029 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.169e-05/0.3584, allocations: 23.86 kB / 1.336 GB, free: 7.266 MB / 1.029 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 6.671e-05/0.3584, allocations: 30.2 kB / 1.336 GB, free: 7.23 MB / 1.029 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.972e-06/0.3584, allocations: 8 kB / 1.336 GB, free: 7.223 MB / 1.029 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.101e-06/0.3584, allocations: 0 / 1.336 GB, free: 7.223 MB / 1.029 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.522e-06/0.3584, allocations: 3.984 kB / 1.336 GB, free: 7.219 MB / 1.029 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0007323/0.3592, allocations: 0.503 MB / 1.336 GB, free: 6.668 MB / 1.029 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.937e-06/0.3592, allocations: 3.938 kB / 1.336 GB, free: 6.664 MB / 1.029 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001001/0.3593, allocations: 15.98 kB / 1.336 GB, free: 6.648 MB / 1.029 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.865e-06/0.3593, allocations: 0 / 1.336 GB, free: 6.648 MB / 1.029 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.883e-05/0.3593, allocations: 8 kB / 1.336 GB, free: 6.641 MB / 1.029 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.043e-06/0.3593, allocations: 0 / 1.336 GB, free: 6.641 MB / 1.029 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.403e-06/0.3593, allocations: 3.938 kB / 1.336 GB, free: 6.637 MB / 1.029 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0005181/0.3598, allocations: 377.4 kB / 1.336 GB, free: 6.254 MB / 1.029 GB Notification: Performance of postOpt removeConstants (simulation): time 3.87e-05/0.3599, allocations: 27.89 kB / 1.336 GB, free: 6.227 MB / 1.029 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.11e-05/0.3599, allocations: 4 kB / 1.336 GB, free: 6.223 MB / 1.029 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 9.157e-05/0.36, allocations: 11.98 kB / 1.336 GB, free: 6.211 MB / 1.029 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.426e-05/0.36, allocations: 15.97 kB / 1.337 GB, free: 6.195 MB / 1.029 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.754e-05/0.3601, allocations: 12 kB / 1.337 GB, free: 6.184 MB / 1.029 GB Notification: Performance of sorting global known variables: time 0.0001674/0.3602, allocations: 164.5 kB / 1.337 GB, free: 6.027 MB / 1.029 GB Notification: Performance of sort global known variables: time 8e-08/0.3602, allocations: 0 / 1.337 GB, free: 6.027 MB / 1.029 GB Notification: Performance of remove unused functions: time 0.0003976/0.3606, allocations: 83.89 kB / 1.337 GB, free: 5.945 MB / 1.029 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 1 (gai.Iy.y) * Number of discrete variables: 13 ($whenCondition9,$whenCondition7,$whenCondition8,$whenCondition5,$whenCondition6,$whenCondition3,$whenCondition4,$whenCondition1,$whenCondition2,tunSta.y,tOff.booPul.y,tOn.booPul.y,u.booPul.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (22): * Single equations (assignments): 18 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 4 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0009117/0.3615, allocations: 0.9253 MB / 1.338 GB, free: 4.996 MB / 1.029 GB Notification: Performance of simCode: created initialization part: time 0.0008792/0.3624, allocations: 0.6211 MB / 1.338 GB, free: 4.301 MB / 1.029 GB Notification: Performance of simCode: created event and clocks part: time 3.006e-06/0.3624, allocations: 4 kB / 1.338 GB, free: 4.297 MB / 1.029 GB Notification: Performance of simCode: created simulation system equations: time 0.0001334/0.3626, allocations: 69.59 kB / 1.338 GB, free: 4.23 MB / 1.029 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0005262/0.3631, allocations: 69.59 kB / 1.338 GB, free: 4.164 MB / 1.029 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004976/0.3681, allocations: 3.737 MB / 1.342 GB, free: 168 kB / 1.029 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001487/0.3682, allocations: 146.1 kB / 1.342 GB, free: 0 / 1.029 GB Notification: Performance of simCode: alias equations: time 0.0001141/0.3683, allocations: 22.23 kB / 1.342 GB, free: 15.98 MB / 1.045 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001292/0.3684, allocations: 83.41 kB / 1.342 GB, free: 15.89 MB / 1.045 GB Notification: Performance of SimCode: time 1.052e-06/0.3684, allocations: 0 / 1.342 GB, free: 15.89 MB / 1.045 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04136/0.4098, allocations: 8.062 MB / 1.35 GB, free: 8.141 MB / 1.045 GB Notification: Performance of buildModelFMU: Generate platform static: time 11.69/12.1, allocations: 13.64 kB / 1.35 GB, free: 8.133 MB / 1.045 GB " [Timeout remaining time 288] (rm -f Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.pipe ; mkfifo Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.pipe ; head -c 1048576 < Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.pipe >> ../files/Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain_res.mat --tempDir=temp_Buildings_12_Buildings_Controls_OBC_Utilities_PIDWithAutotuning_SystemIdentification_FirstOrderTimeDelay_BaseClasses_Validation_Gain_fmu --startTime=0 --stopTime=1 --stepSize=0.0004 --timeout=400 --tolerance=1e-06 Buildings_12_Buildings_Controls_OBC_Utilities_PIDWithAutotuning_SystemIdentification_FirstOrderTimeDelay_BaseClasses_Validation_Gain.fmu > Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.pipe 2>&1) [Timeout 420.0] diffSimulationResults("Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Controls_OBC_Utilities_PIDWithAutotuning_SystemIdentification_FirstOrderTimeDelay_BaseClasses_Validation_Gain.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Controls.OBC.Utilities.PIDWithAutotuning.SystemIdentification.FirstOrderTimeDelay.BaseClasses.Validation.Gain.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300] "" [Timeout remaining time 300] Reference file matches [Calling sys.exit(0), Time elapsed: 18.960183303803205]