Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.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 0.001878/0.001878, 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 0.001989/0.001989, allocations: 212.4 kB / 22.24 MB, free: 5.262 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 1.495/1.495, 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 master/package.mo", uses=false) [Timeout 180]
"Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo): time 3.311/3.311, 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.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow,fileNamePrefix="Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_SeriesFanVVF_Subsequences_Validation_ActiveAirFlow",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow,fileNamePrefix="Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_SeriesFanVVF_Subsequences_Validation_ActiveAirFlow",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 0.002138/0.002138, allocations: 71.77 kB / 1.186 GB, free: 13.7 MB / 0.9044 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3874/0.3895, allocations: 181.9 MB / 1.363 GB, free: 14.1 MB / 1.061 GB
Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow): time 0.00243/0.392, allocations: 0.978 MB / 1.364 GB, free: 13.12 MB / 1.061 GB
Notification: Performance of NFInst.instExpressions: time 0.001296/0.3933, allocations: 0.9999 MB / 1.365 GB, free: 12.11 MB / 1.061 GB
Notification: Performance of NFInst.updateImplicitVariability: time 8.031e-05/0.3933, allocations: 4 kB / 1.365 GB, free: 12.11 MB / 1.061 GB
Notification: Performance of NFTyping.typeComponents: time 5.31e-05/0.3934, allocations: 15.8 kB / 1.365 GB, free: 12.09 MB / 1.061 GB
Notification: Performance of NFTyping.typeBindings: time 0.0001043/0.3935, allocations: 23.69 kB / 1.365 GB, free: 12.07 MB / 1.061 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0002437/0.3937, allocations: 75.86 kB / 1.365 GB, free: 11.99 MB / 1.061 GB
Notification: Performance of NFFlatten.flatten: time 0.0001938/0.3939, allocations: 164 kB / 1.366 GB, free: 11.83 MB / 1.061 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0001728/0.3941, allocations: 64.83 kB / 1.366 GB, free: 11.77 MB / 1.061 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0001893/0.3943, allocations: 79.7 kB / 1.366 GB, free: 11.69 MB / 1.061 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0001116/0.3944, allocations: 63.61 kB / 1.366 GB, free: 11.63 MB / 1.061 GB
Notification: Performance of NFPackage.collectConstants: time 2.966e-05/0.3944, allocations: 20 kB / 1.366 GB, free: 11.61 MB / 1.061 GB
Notification: Performance of NFFlatten.collectFunctions: time 6.728e-05/0.3945, allocations: 24 kB / 1.366 GB, free: 11.59 MB / 1.061 GB
Notification: Performance of NFScalarize.scalarize: time 3.348e-05/0.3945, allocations: 31.92 kB / 1.366 GB, free: 11.55 MB / 1.061 GB
Notification: Performance of NFVerifyModel.verify: time 6.31e-05/0.3946, allocations: 59.66 kB / 1.366 GB, free: 11.5 MB / 1.061 GB
Notification: Performance of NFConvertDAE.convert: time 0.0002853/0.3949, allocations: 215.1 kB / 1.366 GB, free: 11.29 MB / 1.061 GB
Notification: Performance of FrontEnd - DAE generated: time 4.288e-06/0.3949, allocations: 4 kB / 1.366 GB, free: 11.28 MB / 1.061 GB
Notification: Performance of FrontEnd: time 1.373e-06/0.3949, allocations: 3.938 kB / 1.366 GB, free: 11.28 MB / 1.061 GB
Notification: Performance of Transformations before backend: time 9.668e-06/0.3949, allocations: 0 / 1.366 GB, free: 11.28 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: 35
 * Number of variables: 35
Notification: Performance of Generate backend data structure: time 0.0006449/0.3955, allocations: 373.6 kB / 1.367 GB, free: 10.88 MB / 1.061 GB
Notification: Performance of prepare preOptimizeDAE: time 4.102e-05/0.3956, allocations: 12.03 kB / 1.367 GB, free: 10.87 MB / 1.061 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 5.198e-05/0.3956, allocations: 46.73 kB / 1.367 GB, free: 10.81 MB / 1.061 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001441/0.3958, allocations: 32.78 kB / 1.367 GB, free: 10.78 MB / 1.061 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.000425/0.3962, allocations: 190.2 kB / 1.367 GB, free: 10.57 MB / 1.061 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.252e-05/0.3962, allocations: 12.38 kB / 1.367 GB, free: 10.56 MB / 1.061 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 2.602e-05/0.3963, allocations: 12.38 kB / 1.367 GB, free: 10.55 MB / 1.061 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0003355/0.3966, allocations: 150 kB / 1.367 GB, free: 10.39 MB / 1.061 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.313e-05/0.3966, allocations: 7.875 kB / 1.367 GB, free: 10.39 MB / 1.061 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.949e-05/0.3966, allocations: 8 kB / 1.367 GB, free: 10.38 MB / 1.061 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.13e-06/0.3966, allocations: 0 / 1.367 GB, free: 10.38 MB / 1.061 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003414/0.397, allocations: 119.9 kB / 1.367 GB, free: 10.26 MB / 1.061 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.000652/0.3976, allocations: 411.5 kB / 1.367 GB, free: 9.816 MB / 1.061 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0003223/0.3979, allocations: 122.5 kB / 1.368 GB, free: 9.688 MB / 1.061 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001548/0.3981, allocations: 48.83 kB / 1.368 GB, free: 9.637 MB / 1.061 GB
Notification: Performance of preOpt evalFunc (simulation): time 1.812e-05/0.3981, allocations: 0 / 1.368 GB, free: 9.637 MB / 1.061 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.95e-05/0.3982, allocations: 38.56 kB / 1.368 GB, free: 9.59 MB / 1.061 GB
Notification: Performance of pre-optimization done (n=12): time 1.082e-06/0.3982, allocations: 0 / 1.368 GB, free: 9.59 MB / 1.061 GB
Notification: Performance of matching and sorting (n=12): time 0.0005784/0.3987, allocations: 177.8 kB / 1.368 GB, free: 9.41 MB / 1.061 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.669e-05/0.3988, allocations: 51.41 kB / 1.368 GB, free: 9.348 MB / 1.061 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001552/0.3989, allocations: 164.4 kB / 1.368 GB, free: 9.172 MB / 1.061 GB
Notification: Performance of collectPreVariables (initialization): time 2.068e-05/0.3989, allocations: 25.7 kB / 1.368 GB, free: 9.141 MB / 1.061 GB
Notification: Performance of collectInitialEqns (initialization): time 7.989e-05/0.399, allocations: 120.4 kB / 1.368 GB, free: 9.02 MB / 1.061 GB
Notification: Performance of collectInitialBindings (initialization): time 3.461e-05/0.3991, allocations: 35.69 kB / 1.368 GB, free: 8.984 MB / 1.061 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 6.426e-05/0.3991, allocations: 37.7 kB / 1.368 GB, free: 8.941 MB / 1.061 GB
Notification: Performance of setup shared object (initialization): time 0.0001457/0.3993, allocations: 330.8 kB / 1.369 GB, free: 8.609 MB / 1.061 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001512/0.3994, allocations: 51.84 kB / 1.369 GB, free: 8.559 MB / 1.061 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001687/0.3996, allocations: 71.39 kB / 1.369 GB, free: 8.477 MB / 1.061 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0002939/0.3999, allocations: 107.4 kB / 1.369 GB, free: 8.359 MB / 1.061 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.093e-06/0.3999, allocations: 4 kB / 1.369 GB, free: 8.355 MB / 1.061 GB
Notification: Performance of matching and sorting (n=15) (initialization): time 0.0003933/0.4003, allocations: 153.4 kB / 1.369 GB, free: 8.199 MB / 1.061 GB
Notification: Performance of prepare postOptimizeDAE: time 1.761e-05/0.4003, allocations: 11.98 kB / 1.369 GB, free: 8.188 MB / 1.061 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.729e-06/0.4003, allocations: 0 / 1.369 GB, free: 8.188 MB / 1.061 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.482e-05/0.4003, allocations: 0 / 1.369 GB, free: 8.188 MB / 1.061 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001717/0.4005, allocations: 27.92 kB / 1.369 GB, free: 8.16 MB / 1.061 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.571e-06/0.4005, allocations: 4.094 kB / 1.369 GB, free: 8.156 MB / 1.061 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 9.579e-05/0.4006, allocations: 15.98 kB / 1.369 GB, free: 8.141 MB / 1.061 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.389e-05/0.4006, allocations: 8 kB / 1.369 GB, free: 8.133 MB / 1.061 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 4
 * Number of states: 0 ()
 * Number of discrete variables: 9 (reaToInt2.y,actAirSet.or2.y,actAirSet.ifSetUp.y,actAirSet.ifCooDow.y,actAirSet.ifOcc.y,actAirSet.or3.y,actAirSet.setUpMod.y,actAirSet.cooDowMod.y,actAirSet.occMod.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (15):
 * Single equations (assignments): 15
 * 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 0.0001201/0.4007, allocations: 137.7 kB / 1.369 GB, free: 7.988 MB / 1.061 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 3.69e-05/0.4008, allocations: 11.91 kB / 1.369 GB, free: 7.977 MB / 1.061 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 4.366e-05/0.4008, allocations: 20.69 kB / 1.369 GB, free: 7.953 MB / 1.061 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.174e-06/0.4008, allocations: 4 kB / 1.369 GB, free: 7.949 MB / 1.061 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 4.779e-06/0.4008, allocations: 0 / 1.369 GB, free: 7.949 MB / 1.061 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.935e-06/0.4008, allocations: 0 / 1.369 GB, free: 7.949 MB / 1.061 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0002582/0.4011, allocations: 204.6 kB / 1.369 GB, free: 7.707 MB / 1.061 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.193e-06/0.4011, allocations: 0 / 1.369 GB, free: 7.707 MB / 1.061 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001209/0.4012, allocations: 15.98 kB / 1.369 GB, free: 7.691 MB / 1.061 GB
Notification: Performance of postOpt tearingSystem (simulation): time 2.114e-06/0.4012, allocations: 0 / 1.369 GB, free: 7.691 MB / 1.061 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.832e-05/0.4012, allocations: 11.98 kB / 1.369 GB, free: 7.68 MB / 1.061 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.273e-06/0.4012, allocations: 0 / 1.369 GB, free: 7.68 MB / 1.061 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.32e-07/0.4012, allocations: 0 / 1.369 GB, free: 7.68 MB / 1.061 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0004064/0.4016, allocations: 239.2 kB / 1.37 GB, free: 7.43 MB / 1.061 GB
Notification: Performance of postOpt removeConstants (simulation): time 1.791e-05/0.4016, allocations: 11.95 kB / 1.37 GB, free: 7.418 MB / 1.061 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.281e-05/0.4017, allocations: 4 kB / 1.37 GB, free: 7.414 MB / 1.061 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001136/0.4018, allocations: 7.984 kB / 1.37 GB, free: 7.406 MB / 1.061 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 7.8e-05/0.4019, allocations: 19.97 kB / 1.37 GB, free: 7.387 MB / 1.061 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.877e-06/0.4019, allocations: 4 kB / 1.37 GB, free: 7.383 MB / 1.061 GB
Notification: Performance of sorting global known variables: time 8.257e-05/0.4019, allocations: 109.5 kB / 1.37 GB, free: 7.277 MB / 1.061 GB
Notification: Performance of sort global known variables: time 7e-08/0.4019, allocations: 0 / 1.37 GB, free: 7.277 MB / 1.061 GB
Notification: Performance of remove unused functions: time 0.0002762/0.4022, allocations: 31.89 kB / 1.37 GB, free: 7.246 MB / 1.061 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 0 ()
 * Number of discrete variables: 6 (actAirSet.or3.y,actAirSet.ifOcc.y,actAirSet.ifCooDow.y,actAirSet.ifSetUp.y,actAirSet.or2.y,reaToInt2.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (12):
 * Single equations (assignments): 12
 * 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 0.0007387/0.403, allocations: 0.7786 MB / 1.371 GB, free: 6.441 MB / 1.061 GB
Notification: Performance of simCode: created initialization part: time 0.0003722/0.4033, allocations: 107.9 kB / 1.371 GB, free: 6.336 MB / 1.061 GB
Notification: Performance of simCode: created event and clocks part: time 2.074e-06/0.4033, allocations: 0 / 1.371 GB, free: 6.336 MB / 1.061 GB
Notification: Performance of simCode: created simulation system equations: time 0.0001641/0.4035, allocations: 52.64 kB / 1.371 GB, free: 6.285 MB / 1.061 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003548/0.4039, allocations: 30.83 kB / 1.371 GB, free: 6.258 MB / 1.061 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00241/0.4063, allocations: 1.747 MB / 1.372 GB, free: 4.41 MB / 1.061 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001107/0.4064, allocations: 99.23 kB / 1.373 GB, free: 4.289 MB / 1.061 GB
Notification: Performance of simCode: alias equations: time 8.887e-05/0.4065, allocations: 17.08 kB / 1.373 GB, free: 4.273 MB / 1.061 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 9.669e-05/0.4066, allocations: 51.41 kB / 1.373 GB, free: 4.223 MB / 1.061 GB
Notification: Performance of SimCode: time 4.61e-07/0.4066, allocations: 0 / 1.373 GB, free: 4.223 MB / 1.061 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.0308/0.4374, allocations: 3.31 MB / 1.376 GB, free: 1.102 MB / 1.061 GB
Notification: Performance of buildModelFMU: Generate platform static: time 11.36/11.8, allocations: 10.22 kB / 1.376 GB, free: 1.094 MB / 1.061 GB
"
[Timeout remaining time 288]
(rm -f Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.pipe ; mkfifo Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.pipe ; head -c 1048576 < Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.pipe >> ../files/Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow_res.mat --tempDir=temp_Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_SeriesFanVVF_Subsequences_Validation_ActiveAirFlow_fmu --startTime=0 --stopTime=3600 --stepSize=1.44 --timeout=800 --tolerance=1e-06 Buildings_latest_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_SeriesFanVVF_Subsequences_Validation_ActiveAirFlow.fmu > Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.pipe 2>&1) [Timeout 840.0]
diffSimulationResults("Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_SeriesFanVVF_Subsequences_Validation_ActiveAirFlow.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.SeriesFanVVF.Subsequences.Validation.ActiveAirFlow.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: 18.780309532769024]