Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.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 0.0014/0.0014, 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 0.001527/0.001527, allocations: 212.8 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 1.46/1.46, 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 master/package.mo", uses=false) [Timeout 180]
"Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo): time 3.239/3.239, allocations: 0.5107 GB / 0.8158 GB, free: 17.8 MB / 0.6231 GB
"
[Timeout remaining time 176]
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.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides,fileNamePrefix="Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_ParallelFanCVF_Subsequences_Validation_Overrides",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides,fileNamePrefix="Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_ParallelFanCVF_Subsequences_Validation_Overrides",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 0.002051/0.002051, allocations: 68.28 kB / 1.186 GB, free: 13.79 MB / 0.9044 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3694/0.3715, allocations: 181.9 MB / 1.363 GB, free: 14.12 MB / 1.061 GB
Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides): time 0.002822/0.3743, allocations: 1.254 MB / 1.365 GB, free: 12.87 MB / 1.061 GB
Notification: Performance of NFInst.instExpressions: time 0.002038/0.3763, allocations: 1.346 MB / 1.366 GB, free: 11.51 MB / 1.061 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0001315/0.3765, allocations: 4 kB / 1.366 GB, free: 11.5 MB / 1.061 GB
Notification: Performance of NFTyping.typeComponents: time 0.000103/0.3766, allocations: 35.53 kB / 1.366 GB, free: 11.47 MB / 1.061 GB
Notification: Performance of NFTyping.typeBindings: time 0.0001508/0.3767, allocations: 39.61 kB / 1.366 GB, free: 11.43 MB / 1.061 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0006632/0.3774, allocations: 234.1 kB / 1.366 GB, free: 11.2 MB / 1.061 GB
Notification: Performance of NFFlatten.flatten: time 0.0004469/0.3778, allocations: 376.2 kB / 1.367 GB, free: 10.83 MB / 1.061 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0002672/0.3781, allocations: 121.4 kB / 1.367 GB, free: 10.71 MB / 1.061 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0002066/0.3783, allocations: 151.5 kB / 1.367 GB, free: 10.57 MB / 1.061 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0002125/0.3785, allocations: 147.3 kB / 1.367 GB, free: 10.42 MB / 1.061 GB
Notification: Performance of NFPackage.collectConstants: time 6.829e-05/0.3786, allocations: 40 kB / 1.367 GB, free: 10.38 MB / 1.061 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0001178/0.3787, allocations: 51.98 kB / 1.367 GB, free: 10.33 MB / 1.061 GB
Notification: Performance of NFScalarize.scalarize: time 8.27e-05/0.3788, allocations: 83.69 kB / 1.367 GB, free: 10.25 MB / 1.061 GB
Notification: Performance of NFVerifyModel.verify: time 0.0001544/0.3789, allocations: 131.4 kB / 1.367 GB, free: 10.12 MB / 1.061 GB
Notification: Performance of NFConvertDAE.convert: time 0.0006302/0.3796, allocations: 478.3 kB / 1.368 GB, free: 9.652 MB / 1.061 GB
Notification: Performance of FrontEnd - DAE generated: time 5.891e-06/0.3796, allocations: 8 kB / 1.368 GB, free: 9.645 MB / 1.061 GB
Notification: Performance of FrontEnd: time 1.733e-06/0.3796, allocations: 3.938 kB / 1.368 GB, free: 9.641 MB / 1.061 GB
Notification: Performance of Transformations before backend: time 7.905e-06/0.3796, allocations: 0 / 1.368 GB, free: 9.641 MB / 1.061 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 70
 * Number of variables: 70
Notification: Performance of Generate backend data structure: time 0.001237/0.3808, allocations: 0.5655 MB / 1.368 GB, free: 9.031 MB / 1.061 GB
Notification: Performance of prepare preOptimizeDAE: time 3.971e-05/0.3809, allocations: 11.97 kB / 1.368 GB, free: 9.02 MB / 1.061 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 9.444e-05/0.381, allocations: 62.72 kB / 1.368 GB, free: 8.949 MB / 1.061 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 9.337e-05/0.3811, allocations: 40.7 kB / 1.368 GB, free: 8.91 MB / 1.061 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008754/0.3819, allocations: 294.5 kB / 1.369 GB, free: 8.598 MB / 1.061 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.012e-05/0.382, allocations: 25.03 kB / 1.369 GB, free: 8.574 MB / 1.061 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 6.001e-05/0.382, allocations: 40.3 kB / 1.369 GB, free: 8.535 MB / 1.061 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0006718/0.3827, allocations: 317.3 kB / 1.369 GB, free: 8.211 MB / 1.061 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.385e-05/0.3827, allocations: 0 / 1.369 GB, free: 8.211 MB / 1.061 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.117e-05/0.3828, allocations: 16 kB / 1.369 GB, free: 8.195 MB / 1.061 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.046e-05/0.3828, allocations: 8 kB / 1.369 GB, free: 8.188 MB / 1.061 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006754/0.3834, allocations: 225.6 kB / 1.369 GB, free: 7.969 MB / 1.061 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001401/0.3848, allocations: 0.8745 MB / 1.37 GB, free: 7.035 MB / 1.061 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0005377/0.3854, allocations: 195.8 kB / 1.37 GB, free: 6.816 MB / 1.061 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0003032/0.3857, allocations: 98.61 kB / 1.37 GB, free: 6.711 MB / 1.061 GB
Notification: Performance of preOpt evalFunc (simulation): time 3.163e-05/0.3857, allocations: 4 kB / 1.37 GB, free: 6.707 MB / 1.061 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0005246/0.3862, allocations: 178.9 kB / 1.371 GB, free: 6.512 MB / 1.061 GB
Notification: Performance of pre-optimization done (n=22): time 1.383e-06/0.3862, allocations: 0 / 1.371 GB, free: 6.512 MB / 1.061 GB
Notification: Performance of matching and sorting (n=22): time 0.001055/0.3873, allocations: 317.3 kB / 1.371 GB, free: 6.195 MB / 1.061 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 8.418e-05/0.3874, allocations: 114.7 kB / 1.371 GB, free: 6.059 MB / 1.061 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002631/0.3876, allocations: 228 kB / 1.371 GB, free: 5.82 MB / 1.061 GB
Notification: Performance of collectPreVariables (initialization): time 4.145e-05/0.3877, allocations: 33.7 kB / 1.371 GB, free: 5.781 MB / 1.061 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0001553/0.3878, allocations: 184.5 kB / 1.371 GB, free: 5.598 MB / 1.061 GB
Notification: Performance of collectInitialBindings (initialization): time 6.544e-05/0.3879, allocations: 71.47 kB / 1.372 GB, free: 5.527 MB / 1.061 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001419/0.388, allocations: 81.66 kB / 1.372 GB, free: 5.441 MB / 1.061 GB
Notification: Performance of setup shared object (initialization): time 0.0001669/0.3882, allocations: 326.8 kB / 1.372 GB, free: 5.113 MB / 1.061 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003801/0.3886, allocations: 133.9 kB / 1.372 GB, free: 4.973 MB / 1.061 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004333/0.389, allocations: 221.6 kB / 1.372 GB, free: 4.711 MB / 1.061 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0007032/0.3897, allocations: 301.5 kB / 1.373 GB, free: 4.371 MB / 1.061 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.879e-06/0.3897, allocations: 4 kB / 1.373 GB, free: 4.367 MB / 1.061 GB
Notification: Performance of matching and sorting (n=33) (initialization): time 0.0009567/0.3907, allocations: 404.5 kB / 1.373 GB, free: 3.953 MB / 1.061 GB
Notification: Performance of prepare postOptimizeDAE: time 5.319e-05/0.3907, allocations: 43.5 kB / 1.373 GB, free: 3.906 MB / 1.061 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.588e-06/0.3908, allocations: 4 kB / 1.373 GB, free: 3.902 MB / 1.061 GB
Notification: Performance of postOpt tearingSystem (initialization): time 2.082e-05/0.3908, allocations: 4 kB / 1.373 GB, free: 3.898 MB / 1.061 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002949/0.3911, allocations: 59.83 kB / 1.373 GB, free: 3.84 MB / 1.061 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.1e-05/0.3911, allocations: 4 kB / 1.373 GB, free: 3.836 MB / 1.061 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003194/0.3914, allocations: 60.05 kB / 1.373 GB, free: 3.777 MB / 1.061 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.489e-05/0.3914, allocations: 15.98 kB / 1.373 GB, free: 3.762 MB / 1.061 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 13
 * Number of states: 0 ()
 * Number of discrete variables: 19 ($whenCondition1,$whenCondition2,heaOff.y,$PRE.heaOff.y,reaToInt3.y,ove.intEqu2.y,ove.y1Fan,reaToInt1.y,ove.or2.y,ove.intEqu4.y,ove.intEqu3.y,terFan.y,ove.con1.y,ove.con.y,ove.conInt6.y,ove.conInt5.y,ove.logSwi1.y,ove.conInt4.y,ove.conInt3.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (31):
 * Single equations (assignments): 30
 * Array equations: 0
 * Algorithm blocks: 1
 * 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 0.000195/0.3916, allocations: 153.7 kB / 1.373 GB, free: 3.602 MB / 1.061 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 4.169e-05/0.3917, allocations: 23.8 kB / 1.373 GB, free: 3.578 MB / 1.061 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 6.679e-05/0.3917, allocations: 33.39 kB / 1.373 GB, free: 3.539 MB / 1.061 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.512e-06/0.3918, allocations: 4 kB / 1.373 GB, free: 3.535 MB / 1.061 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.63e-06/0.3918, allocations: 4 kB / 1.373 GB, free: 3.531 MB / 1.061 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.068e-06/0.3918, allocations: 0 / 1.373 GB, free: 3.531 MB / 1.061 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0003391/0.3921, allocations: 264.6 kB / 1.374 GB, free: 3.23 MB / 1.061 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.247e-06/0.3921, allocations: 7.984 kB / 1.374 GB, free: 3.223 MB / 1.061 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002359/0.3923, allocations: 43.91 kB / 1.374 GB, free: 3.18 MB / 1.061 GB
Notification: Performance of postOpt tearingSystem (simulation): time 4.829e-06/0.3923, allocations: 3.938 kB / 1.374 GB, free: 3.176 MB / 1.061 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.742e-05/0.3924, allocations: 4 kB / 1.374 GB, free: 3.172 MB / 1.061 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.893e-06/0.3924, allocations: 0 / 1.374 GB, free: 3.172 MB / 1.061 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.336e-06/0.3924, allocations: 3.984 kB / 1.374 GB, free: 3.168 MB / 1.061 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0007031/0.3931, allocations: 276.1 kB / 1.374 GB, free: 2.875 MB / 1.061 GB
Notification: Performance of postOpt removeConstants (simulation): time 3.685e-05/0.3931, allocations: 27.8 kB / 1.374 GB, free: 2.848 MB / 1.061 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.499e-05/0.3931, allocations: 7.938 kB / 1.374 GB, free: 2.84 MB / 1.061 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001578/0.3933, allocations: 19.97 kB / 1.374 GB, free: 2.82 MB / 1.061 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001202/0.3934, allocations: 35.95 kB / 1.374 GB, free: 2.785 MB / 1.061 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.002e-05/0.3934, allocations: 7.984 kB / 1.374 GB, free: 2.777 MB / 1.061 GB
Notification: Performance of sorting global known variables: time 0.0001598/0.3936, allocations: 157.8 kB / 1.374 GB, free: 2.625 MB / 1.061 GB
Notification: Performance of sort global known variables: time 6e-08/0.3936, allocations: 0 / 1.374 GB, free: 2.625 MB / 1.061 GB
Notification: Performance of remove unused functions: time 0.0003485/0.394, allocations: 71.78 kB / 1.374 GB, free: 2.555 MB / 1.061 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 3
 * Number of states: 0 ()
 * Number of discrete variables: 10 ($whenCondition1,$whenCondition2,heaOff.y,ove.y1Fan,ove.intEqu2.y,reaToInt3.y,ove.intEqu3.y,ove.intEqu4.y,ove.or2.y,reaToInt1.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): 21
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 1
 * 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 0.001195/0.3951, allocations: 0.8268 MB / 1.375 GB, free: 1.691 MB / 1.061 GB
Notification: Performance of simCode: created initialization part: time 0.0008759/0.396, allocations: 316.8 kB / 1.375 GB, free: 1.363 MB / 1.061 GB
Notification: Performance of simCode: created event and clocks part: time 2.565e-06/0.396, allocations: 4.562 kB / 1.375 GB, free: 1.359 MB / 1.061 GB
Notification: Performance of simCode: created simulation system equations: time 0.0003693/0.3964, allocations: 115.9 kB / 1.375 GB, free: 1.246 MB / 1.061 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003156/0.3967, allocations: 32.66 kB / 1.375 GB, free: 1.215 MB / 1.061 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004411/0.4011, allocations: 2.713 MB / 1.378 GB, free: 14.31 MB / 1.076 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001682/0.4013, allocations: 155.4 kB / 1.378 GB, free: 14.14 MB / 1.076 GB
Notification: Performance of simCode: alias equations: time 0.0001668/0.4015, allocations: 30.3 kB / 1.378 GB, free: 14.11 MB / 1.076 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.00018/0.4016, allocations: 103.4 kB / 1.378 GB, free: 14.01 MB / 1.076 GB
Notification: Performance of SimCode: time 1.122e-06/0.4016, allocations: 0 / 1.378 GB, free: 14.01 MB / 1.076 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03523/0.4369, allocations: 6.521 MB / 1.385 GB, free: 7.727 MB / 1.076 GB
Notification: Performance of buildModelFMU: Generate platform static: time 11.53/11.97, allocations: 8.875 kB / 1.385 GB, free: 7.719 MB / 1.076 GB
"
[Timeout remaining time 288]
(rm -f Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.pipe ; mkfifo Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.pipe ; head -c 1048576 < Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.pipe >> ../files/Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides_res.mat --tempDir=temp_Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_ParallelFanCVF_Subsequences_Validation_Overrides_fmu --startTime=0 --stopTime=3600 --stepSize=1.44 --timeout=800 --tolerance=1e-06 Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_ParallelFanCVF_Subsequences_Validation_Overrides.fmu > Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.pipe 2>&1) [Timeout 840.0]
diffSimulationResults("Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_ParallelFanCVF_Subsequences_Validation_Overrides.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.ParallelFanCVF.Subsequences.Validation.Overrides.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: 18.724532753694803]