Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.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 0.001715/0.001715, allocations: 97.31 kB / 19.73 MB, free: 2.117 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 0.002152/0.002152, allocations: 218.8 kB / 23.03 MB, free: 4.922 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 1.382/1.382, allocations: 230.6 MB / 256.8 MB, free: 7.801 MB / 206.1 MB
"
[Timeout remaining time 178]
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo", uses=false) [Timeout 180]
"Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo): time 3.062/3.062, allocations: 0.5003 GB / 0.8062 GB, free: 28.31 MB / 0.6231 GB
"
[Timeout remaining time 177]
Using package Buildings with version 13.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/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.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand,fileNamePrefix="Buildings_latest_Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_CylindricalHeatSource_Integrand",fmuType="cs",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand,fileNamePrefix="Buildings_latest_Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_CylindricalHeatSource_Integrand",fmuType="cs",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 0.001935/0.001935, allocations: 81.33 kB / 1.171 GB, free: 19.54 MB / 0.9044 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3175/0.3194, allocations: 179 MB / 1.345 GB, free: 15.93 MB / 1.045 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand): time 0.001765/0.3212, allocations: 0.5917 MB / 1.346 GB, free: 15.34 MB / 1.045 GB
Notification: Performance of NFInst.instExpressions: time 0.002206/0.3234, allocations: 1.568 MB / 1.347 GB, free: 13.75 MB / 1.045 GB
Notification: Performance of NFInst.updateImplicitVariability: time 2.134e-05/0.3234, allocations: 3.938 kB / 1.347 GB, free: 13.75 MB / 1.045 GB
Notification: Performance of NFTyping.typeComponents: time 2.961e-05/0.3234, allocations: 0 / 1.347 GB, free: 13.75 MB / 1.045 GB
Notification: Performance of NFTyping.typeBindings: time 3.526e-05/0.3235, allocations: 3.938 kB / 1.347 GB, free: 13.75 MB / 1.045 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0006465/0.3241, allocations: 195.4 kB / 1.348 GB, free: 13.55 MB / 1.045 GB
Notification: Performance of NFFlatten.flatten: time 7.649e-05/0.3242, allocations: 15.98 kB / 1.348 GB, free: 13.54 MB / 1.045 GB
Notification: Performance of NFFlatten.resolveConnections: time 4.289e-05/0.3242, allocations: 4 kB / 1.348 GB, free: 13.54 MB / 1.045 GB
Notification: Performance of NFEvalConstants.evaluate: time 2.589e-05/0.3242, allocations: 15.92 kB / 1.348 GB, free: 13.52 MB / 1.045 GB
Notification: Performance of NFSimplifyModel.simplify: time 3.136e-05/0.3243, allocations: 8 kB / 1.348 GB, free: 13.51 MB / 1.045 GB
Notification: Performance of NFPackage.collectConstants: time 1.1e-05/0.3243, allocations: 0 / 1.348 GB, free: 13.51 MB / 1.045 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0005547/0.3248, allocations: 283.5 kB / 1.348 GB, free: 13.23 MB / 1.045 GB
Notification: Performance of NFScalarize.scalarize: time 4.259e-05/0.3249, allocations: 15.97 kB / 1.348 GB, free: 13.22 MB / 1.045 GB
Notification: Performance of NFVerifyModel.verify: time 2.947e-05/0.3249, allocations: 7.938 kB / 1.348 GB, free: 13.21 MB / 1.045 GB
Notification: Performance of NFConvertDAE.convert: time 0.0002769/0.3252, allocations: 171.7 kB / 1.348 GB, free: 13.04 MB / 1.045 GB
Notification: Performance of FrontEnd - DAE generated: time 3.737e-06/0.3252, allocations: 0 / 1.348 GB, free: 13.04 MB / 1.045 GB
Notification: Performance of FrontEnd: time 1.463e-06/0.3252, allocations: 0 / 1.348 GB, free: 13.04 MB / 1.045 GB
Notification: Performance of Transformations before backend: time 5.36e-06/0.3252, allocations: 0 / 1.348 GB, free: 13.04 MB / 1.045 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 5
 * Number of variables: 5
Notification: Performance of Generate backend data structure: time 0.0003862/0.3256, allocations: 290 kB / 1.348 GB, free: 12.73 MB / 1.045 GB
Notification: Performance of prepare preOptimizeDAE: time 3.802e-05/0.3256, allocations: 19.97 kB / 1.348 GB, free: 12.71 MB / 1.045 GB
Notification: Performance of preOpt introduceOutputRealDerivatives (simulation): time 1.914e-05/0.3256, allocations: 192 / 1.348 GB, free: 12.71 MB / 1.045 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 2.852e-05/0.3257, allocations: 30.75 kB / 1.348 GB, free: 12.67 MB / 1.045 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000816/0.3265, allocations: 76.81 kB / 1.349 GB, free: 12.6 MB / 1.045 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0001037/0.3266, allocations: 106.5 kB / 1.349 GB, free: 12.47 MB / 1.045 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.258e-05/0.3266, allocations: 4.375 kB / 1.349 GB, free: 12.46 MB / 1.045 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 1.604e-05/0.3266, allocations: 384 / 1.349 GB, free: 12.46 MB / 1.045 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0001803/0.3268, allocations: 93.47 kB / 1.349 GB, free: 12.37 MB / 1.045 GB
Notification: Performance of preOpt findStateOrder (simulation): time 8.155e-06/0.3268, allocations: 0 / 1.349 GB, free: 12.37 MB / 1.045 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.524e-05/0.3268, allocations: 3.984 kB / 1.349 GB, free: 12.36 MB / 1.045 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.908e-06/0.3268, allocations: 0 / 1.349 GB, free: 12.36 MB / 1.045 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0002275/0.3271, allocations: 87.88 kB / 1.349 GB, free: 12.28 MB / 1.045 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0002038/0.3273, allocations: 152.6 kB / 1.349 GB, free: 12.09 MB / 1.045 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0001669/0.3274, allocations: 82.58 kB / 1.349 GB, free: 12 MB / 1.045 GB
Notification: Performance of preOpt resolveLoops (simulation): time 7.43e-05/0.3275, allocations: 40.94 kB / 1.349 GB, free: 11.95 MB / 1.045 GB
Notification: Performance of preOpt evalFunc (simulation): time 1.538e-05/0.3275, allocations: 7.938 kB / 1.349 GB, free: 11.95 MB / 1.045 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.147e-05/0.3276, allocations: 42.5 kB / 1.349 GB, free: 11.89 MB / 1.045 GB
Notification: Performance of pre-optimization done (n=5): time 1.082e-06/0.3276, allocations: 0 / 1.349 GB, free: 11.89 MB / 1.045 GB
Notification: Performance of matching and sorting (n=5): time 0.0003415/0.3279, allocations: 133.6 kB / 1.349 GB, free: 11.76 MB / 1.045 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.977e-05/0.3279, allocations: 55.41 kB / 1.349 GB, free: 11.69 MB / 1.045 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 8.55e-05/0.328, allocations: 101.9 kB / 1.349 GB, free: 11.58 MB / 1.045 GB
Notification: Performance of collectPreVariables (initialization): time 2.208e-05/0.328, allocations: 25.7 kB / 1.349 GB, free: 11.55 MB / 1.045 GB
Notification: Performance of collectInitialEqns (initialization): time 4.673e-05/0.3281, allocations: 88.12 kB / 1.35 GB, free: 11.46 MB / 1.045 GB
Notification: Performance of collectInitialBindings (initialization): time 3.959e-05/0.3281, allocations: 19.8 kB / 1.35 GB, free: 11.44 MB / 1.045 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 5.627e-05/0.3282, allocations: 25.69 kB / 1.35 GB, free: 11.41 MB / 1.045 GB
Notification: Performance of setup shared object (initialization): time 0.0001312/0.3283, allocations: 322.8 kB / 1.35 GB, free: 11.09 MB / 1.045 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 6.388e-05/0.3284, allocations: 27.97 kB / 1.35 GB, free: 11.06 MB / 1.045 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 6.034e-05/0.3284, allocations: 35.91 kB / 1.35 GB, free: 11.02 MB / 1.045 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0001473/0.3286, allocations: 76.73 kB / 1.35 GB, free: 10.95 MB / 1.045 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.833e-06/0.3286, allocations: 3.938 kB / 1.35 GB, free: 10.94 MB / 1.045 GB
Notification: Performance of matching and sorting (n=5) (initialization): time 0.0002246/0.3288, allocations: 113.5 kB / 1.35 GB, free: 10.82 MB / 1.045 GB
Notification: Performance of prepare postOptimizeDAE: time 1.748e-05/0.3288, allocations: 10.19 kB / 1.35 GB, free: 10.82 MB / 1.045 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.428e-06/0.3288, allocations: 0 / 1.35 GB, free: 10.82 MB / 1.045 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.342e-05/0.3288, allocations: 0.6875 kB / 1.35 GB, free: 10.82 MB / 1.045 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002078/0.3291, allocations: 19.97 kB / 1.35 GB, free: 10.8 MB / 1.045 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.703e-06/0.3291, allocations: 4 kB / 1.35 GB, free: 10.79 MB / 1.045 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001116/0.3292, allocations: 8 kB / 1.35 GB, free: 10.79 MB / 1.045 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.595e-05/0.3292, allocations: 3.984 kB / 1.35 GB, free: 10.78 MB / 1.045 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 1
 * 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 (5):
 * Single equations (assignments): 5
 * 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 9.285e-05/0.3293, allocations: 113.8 kB / 1.35 GB, free: 10.66 MB / 1.045 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 2.577e-05/0.3293, allocations: 11.89 kB / 1.35 GB, free: 10.65 MB / 1.045 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0004455/0.3298, allocations: 209.2 kB / 1.35 GB, free: 10.43 MB / 1.045 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.509e-06/0.3298, allocations: 4 kB / 1.35 GB, free: 10.43 MB / 1.045 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 3.877e-06/0.3298, allocations: 0 / 1.35 GB, free: 10.43 MB / 1.045 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.052e-06/0.3298, allocations: 7.984 kB / 1.35 GB, free: 10.42 MB / 1.045 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0001887/0.33, allocations: 180.6 kB / 1.351 GB, free: 10.2 MB / 1.045 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.296e-06/0.33, allocations: 3.938 kB / 1.351 GB, free: 10.2 MB / 1.045 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001638/0.3301, allocations: 27.92 kB / 1.351 GB, free: 10.17 MB / 1.045 GB
Notification: Performance of postOpt tearingSystem (simulation): time 3.947e-06/0.3301, allocations: 4 kB / 1.351 GB, free: 10.17 MB / 1.045 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.376e-05/0.3301, allocations: 3.984 kB / 1.351 GB, free: 10.16 MB / 1.045 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.914e-06/0.3301, allocations: 0 / 1.351 GB, free: 10.16 MB / 1.045 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.71e-07/0.3301, allocations: 0 / 1.351 GB, free: 10.16 MB / 1.045 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002844/0.3304, allocations: 191.7 kB / 1.351 GB, free: 9.961 MB / 1.045 GB
Notification: Performance of postOpt removeConstants (simulation): time 1.403e-05/0.3304, allocations: 15.83 kB / 1.351 GB, free: 9.945 MB / 1.045 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 1.843e-05/0.3305, allocations: 0 / 1.351 GB, free: 9.945 MB / 1.045 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 8.815e-05/0.3306, allocations: 12 kB / 1.351 GB, free: 9.934 MB / 1.045 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 3.038e-05/0.3306, allocations: 7.984 kB / 1.351 GB, free: 9.926 MB / 1.045 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.204e-05/0.3306, allocations: 3.984 kB / 1.351 GB, free: 9.922 MB / 1.045 GB
Notification: Performance of sorting global known variables: time 4.86e-05/0.3306, allocations: 87.28 kB / 1.351 GB, free: 9.836 MB / 1.045 GB
Notification: Performance of sort global known variables: time 1e-07/0.3306, allocations: 0 / 1.351 GB, free: 9.836 MB / 1.045 GB
Notification: Performance of remove unused functions: time 0.0003021/0.3309, allocations: 71.8 kB / 1.351 GB, free: 9.766 MB / 1.045 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * 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 (16):
 * Single equations (assignments): 16
 * 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 0.0008447/0.3318, allocations: 0.8112 MB / 1.352 GB, free: 8.922 MB / 1.045 GB
Notification: Performance of simCode: created initialization part: time 0.000236/0.332, allocations: 104 kB / 1.352 GB, free: 8.82 MB / 1.045 GB
Notification: Performance of simCode: created event and clocks part: time 2.535e-06/0.332, allocations: 0 / 1.352 GB, free: 8.82 MB / 1.045 GB
Notification: Performance of simCode: created simulation system equations: time 0.0001038/0.3321, allocations: 63.91 kB / 1.352 GB, free: 8.758 MB / 1.045 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0001718/0.3323, allocations: 11.98 kB / 1.352 GB, free: 8.746 MB / 1.045 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0006214/0.3329, allocations: 274 kB / 1.352 GB, free: 8.438 MB / 1.045 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 6.893e-05/0.333, allocations: 79.27 kB / 1.352 GB, free: 8.34 MB / 1.045 GB
Notification: Performance of simCode: alias equations: time 8.926e-05/0.3331, allocations: 35.75 kB / 1.352 GB, free: 8.305 MB / 1.045 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 9.466e-05/0.3332, allocations: 27.42 kB / 1.352 GB, free: 8.281 MB / 1.045 GB
Notification: Performance of SimCode: time 3.01e-07/0.3332, allocations: 4 kB / 1.352 GB, free: 8.277 MB / 1.045 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.02338/0.3566, allocations: 3.848 MB / 1.356 GB, free: 4.637 MB / 1.045 GB
Notification: Performance of buildModelFMU: Generate platform static: time 10.91/11.27, allocations: 10.61 kB / 1.356 GB, free: 4.629 MB / 1.045 GB
"
[Timeout remaining time 289]
(rm -f Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.pipe ; mkfifo Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.pipe >> ../files/Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand_res.mat --tempDir=temp_Buildings_latest_Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_CylindricalHeatSource_Integrand_fmu --startTime=0.01 --stopTime=15 --stepSize=0.005996 --timeout=800 --tolerance=1e-06 Buildings_latest_Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_CylindricalHeatSource_Integrand.fmu > Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.pipe 2>&1) [Timeout 840.0]
diffSimulationResults("Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_CylindricalHeatSource_Integrand.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.CylindricalHeatSource_Integrand.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: 17.723976999986917]