Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_11_Buildings.Fluid.Examples.Performance.Example4.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 0.001367/0.001367, allocations: 99.64 kB / 18.94 MB, free: 2.551 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 0.00152/0.00152, allocations: 217.1 kB / 22.25 MB, free: 4.852 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 1.456/1.456, allocations: 230.6 MB / 256 MB, free: 7.793 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/package.mo): time 2.741/2.741, allocations: 476 MB / 0.7699 GB, free: 4.695 MB / 0.6231 GB " [Timeout remaining time 177] Using package Buildings with version 11.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.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.Fluid.Examples.Performance.Example4,fileNamePrefix="Buildings_11_Buildings_Fluid_Examples_Performance_Example4",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Examples.Performance.Example4,fileNamePrefix="Buildings_11_Buildings_Fluid_Examples_Performance_Example4",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 0.002083/0.002083, allocations: 65.56 kB / 1.117 GB, free: 41.04 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3007/0.3028, allocations: 170 MB / 1.283 GB, free: 12.36 MB / 0.9825 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.Example4): time 0.2518/0.5547, allocations: 211 MB / 1.489 GB, free: 8.594 MB / 1.186 GB Notification: Performance of NFInst.instExpressions: time 0.02253/0.5772, allocations: 14.62 MB / 1.503 GB, free: 9.938 MB / 1.201 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002011/0.5792, allocations: 79.31 kB / 1.503 GB, free: 9.859 MB / 1.201 GB Notification: Performance of NFTyping.typeComponents: time 0.002709/0.5819, allocations: 1.006 MB / 1.504 GB, free: 8.848 MB / 1.201 GB Notification: Performance of NFTyping.typeBindings: time 0.008254/0.5902, allocations: 3.107 MB / 1.507 GB, free: 5.73 MB / 1.201 GB Notification: Performance of NFTyping.typeClassSections: time 0.005073/0.5953, allocations: 1.711 MB / 1.509 GB, free: 4.027 MB / 1.201 GB Notification: Performance of NFFlatten.flatten: time 0.005394/0.6007, allocations: 3.472 MB / 1.512 GB, free: 0.5469 MB / 1.201 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001812/0.6025, allocations: 0.9949 MB / 1.513 GB, free: 15.52 MB / 1.217 GB Notification: Performance of NFEvalConstants.evaluate: time 0.006557/0.609, allocations: 2.603 MB / 1.516 GB, free: 12.92 MB / 1.217 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002382/0.6114, allocations: 1.096 MB / 1.517 GB, free: 11.83 MB / 1.217 GB Notification: Performance of NFPackage.collectConstants: time 0.000273/0.6117, allocations: 120 kB / 1.517 GB, free: 11.71 MB / 1.217 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005181/0.6169, allocations: 2.56 MB / 1.519 GB, free: 9.145 MB / 1.217 GB Notification: Performance of NFScalarize.scalarize: time 0.000619/0.6175, allocations: 494.2 kB / 1.52 GB, free: 8.66 MB / 1.217 GB Notification: Performance of NFVerifyModel.verify: time 0.0009655/0.6184, allocations: 0.6531 MB / 1.52 GB, free: 8.004 MB / 1.217 GB Notification: Performance of NFConvertDAE.convert: time 0.005257/0.6237, allocations: 2.92 MB / 1.523 GB, free: 5.074 MB / 1.217 GB Notification: Performance of FrontEnd - DAE generated: time 4.088e-06/0.6237, allocations: 0 / 1.523 GB, free: 5.074 MB / 1.217 GB Notification: Performance of FrontEnd: time 1.463e-06/0.6237, allocations: 0 / 1.523 GB, free: 5.074 MB / 1.217 GB Notification: Performance of Transformations before backend: time 2.938e-05/0.6237, allocations: 0 / 1.523 GB, free: 5.074 MB / 1.217 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 251 * Number of variables: 251 Notification: Performance of Generate backend data structure: time 0.003835/0.6276, allocations: 1.981 MB / 1.525 GB, free: 3.051 MB / 1.217 GB Notification: Performance of prepare preOptimizeDAE: time 4.279e-05/0.6276, allocations: 8.031 kB / 1.525 GB, free: 3.043 MB / 1.217 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.000207/0.6278, allocations: 164.2 kB / 1.525 GB, free: 2.875 MB / 1.217 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00288/0.6307, allocations: 0.5102 MB / 1.526 GB, free: 2.363 MB / 1.217 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002623/0.6333, allocations: 1.093 MB / 1.527 GB, free: 1.223 MB / 1.217 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.263e-05/0.6334, allocations: 78 kB / 1.527 GB, free: 1.145 MB / 1.217 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001727/0.6336, allocations: 96 kB / 1.527 GB, free: 1.051 MB / 1.217 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002721/0.6363, allocations: 1.458 MB / 1.528 GB, free: 15.45 MB / 1.232 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.724e-05/0.6363, allocations: 7.938 kB / 1.528 GB, free: 15.44 MB / 1.232 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001079/0.6364, allocations: 44 kB / 1.529 GB, free: 15.4 MB / 1.232 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.37e-05/0.6365, allocations: 42 kB / 1.529 GB, free: 15.36 MB / 1.232 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00254/0.639, allocations: 1.054 MB / 1.53 GB, free: 14.3 MB / 1.232 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.008141/0.6472, allocations: 5.979 MB / 1.535 GB, free: 8.105 MB / 1.232 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001693/0.6489, allocations: 0.5191 MB / 1.536 GB, free: 7.578 MB / 1.232 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006475/0.6495, allocations: 249.2 kB / 1.536 GB, free: 7.332 MB / 1.232 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002878/0.6498, allocations: 60.23 kB / 1.536 GB, free: 7.273 MB / 1.232 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.538e-05/0.6499, allocations: 38.84 kB / 1.536 GB, free: 7.227 MB / 1.232 GB Notification: Performance of pre-optimization done (n=33): time 3.867e-06/0.6499, allocations: 3.984 kB / 1.536 GB, free: 7.223 MB / 1.232 GB Notification: Performance of matching and sorting (n=33): time 0.002537/0.6524, allocations: 0.8493 MB / 1.537 GB, free: 6.367 MB / 1.232 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.362e-05/0.6524, allocations: 51.41 kB / 1.537 GB, free: 6.305 MB / 1.232 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002027/0.6545, allocations: 1.418 MB / 1.539 GB, free: 4.875 MB / 1.232 GB Notification: Performance of collectPreVariables (initialization): time 6.689e-05/0.6545, allocations: 33.7 kB / 1.539 GB, free: 4.836 MB / 1.232 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006393/0.6552, allocations: 0.7157 MB / 1.539 GB, free: 4.117 MB / 1.232 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001236/0.6553, allocations: 123 kB / 1.539 GB, free: 3.996 MB / 1.232 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002639/0.6556, allocations: 166.5 kB / 1.54 GB, free: 3.828 MB / 1.232 GB Notification: Performance of setup shared object (initialization): time 0.0001512/0.6557, allocations: 337.9 kB / 1.54 GB, free: 3.492 MB / 1.232 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008972/0.6566, allocations: 320.6 kB / 1.54 GB, free: 3.176 MB / 1.232 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001341/0.6579, allocations: 0.9689 MB / 1.541 GB, free: 1.965 MB / 1.232 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001883/0.6598, allocations: 0.9266 MB / 1.542 GB, free: 0.8789 MB / 1.232 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.442e-06/0.6598, allocations: 3.938 kB / 1.542 GB, free: 0.875 MB / 1.232 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.002548/0.6624, allocations: 1.063 MB / 1.543 GB, free: 15.8 MB / 1.248 GB Notification: Performance of prepare postOptimizeDAE: time 2.221e-05/0.6624, allocations: 8 kB / 1.543 GB, free: 15.8 MB / 1.248 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.948e-05/0.6624, allocations: 19.97 kB / 1.543 GB, free: 15.78 MB / 1.248 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.192e-05/0.6625, allocations: 16.75 kB / 1.543 GB, free: 15.76 MB / 1.248 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008837/0.6633, allocations: 203.6 kB / 1.543 GB, free: 15.56 MB / 1.248 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.746e-05/0.6634, allocations: 23.92 kB / 1.543 GB, free: 15.54 MB / 1.248 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001336/0.6647, allocations: 175.1 kB / 1.543 GB, free: 15.37 MB / 1.248 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.82e-05/0.6648, allocations: 51.98 kB / 1.544 GB, free: 15.32 MB / 1.248 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.00128/0.6661, allocations: 0.5643 MB / 1.544 GB, free: 14.75 MB / 1.248 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001329/0.6674, allocations: 0.9572 MB / 1.545 GB, free: 13.54 MB / 1.248 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.00188/0.6693, allocations: 0.9254 MB / 1.546 GB, free: 12.46 MB / 1.248 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 5.461e-06/0.6693, allocations: 4 kB / 1.546 GB, free: 12.45 MB / 1.248 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.002537/0.6718, allocations: 1.063 MB / 1.547 GB, free: 11.38 MB / 1.248 GB Notification: Performance of prepare postOptimizeDAE: time 1.901e-05/0.6718, allocations: 9.719 kB / 1.547 GB, free: 11.38 MB / 1.248 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.398e-05/0.6719, allocations: 12 kB / 1.547 GB, free: 11.36 MB / 1.248 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.847e-05/0.6719, allocations: 20.06 kB / 1.547 GB, free: 11.34 MB / 1.248 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000856/0.6727, allocations: 195.7 kB / 1.547 GB, free: 11.15 MB / 1.248 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.649e-05/0.6728, allocations: 27.86 kB / 1.547 GB, free: 11.12 MB / 1.248 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001275/0.674, allocations: 139.5 kB / 1.547 GB, free: 10.99 MB / 1.248 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.122e-05/0.6741, allocations: 47.98 kB / 1.547 GB, free: 10.94 MB / 1.248 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 52 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (88): * Single equations (assignments): 88 * Array equations: 0 * Algorithm blocks: 0 * 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 0.0002474/0.6744, allocations: 232 kB / 1.548 GB, free: 10.71 MB / 1.248 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000232/0.6746, allocations: 151 kB / 1.548 GB, free: 10.56 MB / 1.248 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001782/0.6764, allocations: 0.6342 MB / 1.548 GB, free: 9.91 MB / 1.248 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.106e-06/0.6764, allocations: 7.984 kB / 1.548 GB, free: 9.902 MB / 1.248 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.368e-06/0.6764, allocations: 3.938 kB / 1.548 GB, free: 9.898 MB / 1.248 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.138e-06/0.6764, allocations: 0 / 1.548 GB, free: 9.898 MB / 1.248 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003724/0.6801, allocations: 1.749 MB / 1.55 GB, free: 8.047 MB / 1.248 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.987e-06/0.6801, allocations: 7.938 kB / 1.55 GB, free: 8.039 MB / 1.248 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005232/0.6806, allocations: 96.02 kB / 1.55 GB, free: 7.945 MB / 1.248 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.015e-06/0.6807, allocations: 4 kB / 1.55 GB, free: 7.941 MB / 1.248 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.79e-05/0.6807, allocations: 15.98 kB / 1.55 GB, free: 7.926 MB / 1.248 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.677e-06/0.6807, allocations: 7.938 kB / 1.55 GB, free: 7.918 MB / 1.248 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.512e-06/0.6807, allocations: 11.94 kB / 1.55 GB, free: 7.906 MB / 1.248 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001686/0.6824, allocations: 0.8123 MB / 1.551 GB, free: 7.027 MB / 1.248 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005839/0.683, allocations: 218.8 kB / 1.551 GB, free: 6.812 MB / 1.248 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001916/0.6832, allocations: 15.98 kB / 1.551 GB, free: 6.797 MB / 1.248 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001039/0.6842, allocations: 71.92 kB / 1.551 GB, free: 6.727 MB / 1.248 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.54e-05/0.6843, allocations: 35.83 kB / 1.551 GB, free: 6.691 MB / 1.248 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.586e-05/0.6843, allocations: 19.98 kB / 1.551 GB, free: 6.672 MB / 1.248 GB Notification: Performance of sorting global known variables: time 0.001611/0.686, allocations: 1.009 MB / 1.552 GB, free: 5.668 MB / 1.248 GB Notification: Performance of sort global known variables: time 1.3e-07/0.686, allocations: 0 / 1.552 GB, free: 5.668 MB / 1.248 GB Notification: Performance of remove unused functions: time 0.001824/0.6878, allocations: 0.5736 MB / 1.553 GB, free: 5.094 MB / 1.248 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 16 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (32): * Single equations (assignments): 32 * Array equations: 0 * Algorithm blocks: 0 * 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 Backend phase and start with SimCode phase: time 0.002434/0.6902, allocations: 1.507 MB / 1.554 GB, free: 3.516 MB / 1.248 GB Notification: Performance of simCode: created initialization part: time 0.002955/0.6932, allocations: 1.082 MB / 1.555 GB, free: 2.438 MB / 1.248 GB Notification: Performance of simCode: created event and clocks part: time 5.791e-06/0.6932, allocations: 0 / 1.555 GB, free: 2.438 MB / 1.248 GB Notification: Performance of simCode: created simulation system equations: time 0.0006989/0.6939, allocations: 249.4 kB / 1.556 GB, free: 2.195 MB / 1.248 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003587/0.6975, allocations: 0.7412 MB / 1.556 GB, free: 1.457 MB / 1.248 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01815/0.7156, allocations: 9.846 MB / 1.566 GB, free: 7.074 MB / 1.264 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007145/0.7163, allocations: 0.5918 MB / 1.567 GB, free: 6.445 MB / 1.264 GB Notification: Performance of simCode: alias equations: time 0.001484/0.7178, allocations: 383.7 kB / 1.567 GB, free: 6.066 MB / 1.264 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007283/0.7185, allocations: 499.3 kB / 1.567 GB, free: 5.582 MB / 1.264 GB Notification: Performance of SimCode: time 8.91e-07/0.7185, allocations: 0 / 1.567 GB, free: 5.582 MB / 1.264 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.6472/1.366, allocations: 39.21 MB / 1.606 GB, free: 318.6 MB / 1.295 GB Notification: Performance of buildModelFMU: Generate platform static: time 12.46/13.83, allocations: 1.922 kB / 1.606 GB, free: 318.6 MB / 1.295 GB " [Timeout remaining time 286] (rm -f Buildings_11_Buildings.Fluid.Examples.Performance.Example4.pipe ; mkfifo Buildings_11_Buildings.Fluid.Examples.Performance.Example4.pipe ; head -c 1048576 < Buildings_11_Buildings.Fluid.Examples.Performance.Example4.pipe >> ../files/Buildings_11_Buildings.Fluid.Examples.Performance.Example4.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_11_Buildings.Fluid.Examples.Performance.Example4_res.mat --tempDir=temp_Buildings_11_Buildings_Fluid_Examples_Performance_Example4_fmu --startTime=0 --stopTime=20 --stepSize=0.008 --timeout=400 --tolerance=1e-06 Buildings_11_Buildings_Fluid_Examples_Performance_Example4.fmu > Buildings_11_Buildings.Fluid.Examples.Performance.Example4.pipe 2>&1) [Timeout 420.0] diffSimulationResults("Buildings_11_Buildings.Fluid.Examples.Performance.Example4_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_11.x/Buildings_Fluid_Examples_Performance_Example4.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_11_Buildings.Fluid.Examples.Performance.Example4.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: 20.311932351905853]