Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.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 0.001304/0.001304, allocations: 113 kB / 18.94 MB, free: 2.934 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 0.001596/0.001596, allocations: 207.2 kB / 22.25 MB, free: 5.086 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 1.552/1.552, allocations: 230.6 MB / 256 MB, free: 8.02 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 3.486/3.486, allocations: 0.49 GB / 0.7951 GB, free: 33.37 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.Occupants.BaseClasses.Validation.Weibull1DOFF,fileNamePrefix="Buildings_12_Buildings_Occupants_BaseClasses_Validation_Weibull1DOFF",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF,fileNamePrefix="Buildings_12_Buildings_Occupants_BaseClasses_Validation_Weibull1DOFF",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 0.002076/0.002076, allocations: 70.86 kB / 1.154 GB, free: 25.71 MB / 0.9044 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3989/0.401, allocations: 176.1 MB / 1.326 GB, free: 2.004 MB / 1.014 GB
Notification: Performance of NFInst.instantiate(Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF): time 0.002483/0.4034, allocations: 1.252 MB / 1.327 GB, free: 0.7461 MB / 1.014 GB
Notification: Performance of NFInst.instExpressions: time 0.001096/0.4045, allocations: 486.8 kB / 1.328 GB, free: 276 kB / 1.014 GB
Notification: Performance of NFInst.updateImplicitVariability: time 3.477e-05/0.4046, allocations: 0 / 1.328 GB, free: 276 kB / 1.014 GB
Notification: Performance of NFTyping.typeComponents: time 8.931e-05/0.4047, allocations: 7.938 kB / 1.328 GB, free: 268 kB / 1.014 GB
Notification: Performance of NFTyping.typeBindings: time 1.769e-05/0.4047, allocations: 0 / 1.328 GB, free: 268 kB / 1.014 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0005719/0.4053, allocations: 127.5 kB / 1.328 GB, free: 140 kB / 1.014 GB
Notification: Performance of NFFlatten.flatten: time 0.0001008/0.4054, allocations: 23.92 kB / 1.328 GB, free: 116 kB / 1.014 GB
Notification: Performance of NFFlatten.resolveConnections: time 4.209e-05/0.4054, allocations: 0 / 1.328 GB, free: 116 kB / 1.014 GB
Notification: Performance of NFEvalConstants.evaluate: time 3.073e-05/0.4054, allocations: 11.94 kB / 1.328 GB, free: 104 kB / 1.014 GB
Notification: Performance of NFSimplifyModel.simplify: time 3.578e-05/0.4055, allocations: 11.97 kB / 1.328 GB, free: 92 kB / 1.014 GB
Notification: Performance of NFPackage.collectConstants: time 1.362e-05/0.4055, allocations: 11.94 kB / 1.328 GB, free: 80 kB / 1.014 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0003269/0.4058, allocations: 143.7 kB / 1.328 GB, free: 15.94 MB / 1.029 GB
Notification: Performance of NFScalarize.scalarize: time 5.318e-05/0.4059, allocations: 23.92 kB / 1.328 GB, free: 15.91 MB / 1.029 GB
Notification: Performance of NFVerifyModel.verify: time 4.552e-05/0.4059, allocations: 35.67 kB / 1.328 GB, free: 15.88 MB / 1.029 GB
Notification: Performance of NFConvertDAE.convert: time 0.0002297/0.4061, allocations: 131.8 kB / 1.328 GB, free: 15.75 MB / 1.029 GB
Notification: Performance of FrontEnd - DAE generated: time 3.346e-06/0.4061, allocations: 0 / 1.328 GB, free: 15.75 MB / 1.029 GB
Notification: Performance of FrontEnd: time 1.563e-06/0.4061, allocations: 3.938 kB / 1.328 GB, free: 15.75 MB / 1.029 GB
Notification: Performance of Transformations before backend: time 5.2e-06/0.4061, allocations: 0 / 1.328 GB, free: 15.75 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: 36
 * Number of variables: 36
Notification: Performance of Generate backend data structure: time 0.0005345/0.4067, allocations: 380.3 kB / 1.328 GB, free: 15.33 MB / 1.029 GB
Notification: Performance of prepare preOptimizeDAE: time 3.98e-05/0.4067, allocations: 12.03 kB / 1.328 GB, free: 15.32 MB / 1.029 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 7.434e-05/0.4068, allocations: 46.73 kB / 1.328 GB, free: 15.27 MB / 1.029 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 9.16e-05/0.4069, allocations: 16.83 kB / 1.329 GB, free: 15.25 MB / 1.029 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0001188/0.407, allocations: 126.4 kB / 1.329 GB, free: 15.1 MB / 1.029 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.728e-05/0.407, allocations: 384 / 1.329 GB, free: 15.1 MB / 1.029 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 9.728e-06/0.407, allocations: 4.375 kB / 1.329 GB, free: 15.1 MB / 1.029 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0002055/0.4072, allocations: 150.8 kB / 1.329 GB, free: 14.95 MB / 1.029 GB
Notification: Performance of preOpt findStateOrder (simulation): time 9.768e-06/0.4072, allocations: 3.938 kB / 1.329 GB, free: 14.94 MB / 1.029 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.022e-05/0.4073, allocations: 4 kB / 1.329 GB, free: 14.94 MB / 1.029 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.877e-06/0.4073, allocations: 4 kB / 1.329 GB, free: 14.93 MB / 1.029 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 7.752e-05/0.4073, allocations: 67.97 kB / 1.329 GB, free: 14.87 MB / 1.029 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0003733/0.4077, allocations: 259.8 kB / 1.329 GB, free: 14.57 MB / 1.029 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0001441/0.4079, allocations: 94.73 kB / 1.329 GB, free: 14.47 MB / 1.029 GB
Notification: Performance of preOpt resolveLoops (simulation): time 8.393e-05/0.4079, allocations: 76.41 kB / 1.329 GB, free: 14.39 MB / 1.029 GB
Notification: Performance of preOpt evalFunc (simulation): time 1.182e-05/0.4079, allocations: 3.984 kB / 1.329 GB, free: 14.39 MB / 1.029 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0002658/0.4082, allocations: 175.4 kB / 1.329 GB, free: 14.2 MB / 1.029 GB
Notification: Performance of pre-optimization done (n=38): time 1.323e-06/0.4082, allocations: 0 / 1.329 GB, free: 14.2 MB / 1.029 GB
Notification: Performance of matching and sorting (n=38): time 0.000681/0.4089, allocations: 488.3 kB / 1.33 GB, free: 13.72 MB / 1.029 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 8.083e-05/0.409, allocations: 95.3 kB / 1.33 GB, free: 13.62 MB / 1.029 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001062/0.4091, allocations: 129.7 kB / 1.33 GB, free: 13.48 MB / 1.029 GB
Notification: Performance of collectPreVariables (initialization): time 4.803e-05/0.4091, allocations: 49.69 kB / 1.33 GB, free: 13.43 MB / 1.029 GB
Notification: Performance of collectInitialEqns (initialization): time 5.488e-05/0.4092, allocations: 80.8 kB / 1.33 GB, free: 13.34 MB / 1.029 GB
Notification: Performance of collectInitialBindings (initialization): time 8.924e-05/0.4093, allocations: 103.4 kB / 1.33 GB, free: 13.24 MB / 1.029 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001093/0.4094, allocations: 89.67 kB / 1.33 GB, free: 13.14 MB / 1.029 GB
Notification: Performance of setup shared object (initialization): time 0.0001821/0.4096, allocations: 342.8 kB / 1.331 GB, free: 12.8 MB / 1.029 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001876/0.4098, allocations: 144.6 kB / 1.331 GB, free: 12.66 MB / 1.029 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002476/0.41, allocations: 209 kB / 1.331 GB, free: 12.43 MB / 1.029 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0004908/0.4105, allocations: 409.3 kB / 1.331 GB, free: 12.02 MB / 1.029 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.298e-06/0.4105, allocations: 3.938 kB / 1.331 GB, free: 12.01 MB / 1.029 GB
Notification: Performance of matching and sorting (n=74) (initialization): time 0.000574/0.4111, allocations: 446.4 kB / 1.332 GB, free: 11.57 MB / 1.029 GB
Notification: Performance of prepare postOptimizeDAE: time 1.704e-05/0.4111, allocations: 4 kB / 1.332 GB, free: 11.57 MB / 1.029 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.031e-05/0.4111, allocations: 8.125 kB / 1.332 GB, free: 11.56 MB / 1.029 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.522e-05/0.4111, allocations: 0 / 1.332 GB, free: 11.56 MB / 1.029 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 9.381e-05/0.4112, allocations: 27.86 kB / 1.332 GB, free: 11.53 MB / 1.029 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.237e-06/0.4112, allocations: 4 kB / 1.332 GB, free: 11.53 MB / 1.029 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 6.867e-05/0.4113, allocations: 35.67 kB / 1.332 GB, free: 11.49 MB / 1.029 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.268e-05/0.4113, allocations: 12 kB / 1.332 GB, free: 11.48 MB / 1.029 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 6
 * Number of states: 0 ()
 * Number of discrete variables: 72 (state[33],$PRE.state[33],state[32],$PRE.state[32],state[31],$PRE.state[31],state[30],$PRE.state[30],state[29],$PRE.state[29],state[28],$PRE.state[28],state[27],$PRE.state[27],state[26],$PRE.state[26],state[25],$PRE.state[25],state[24],$PRE.state[24],state[23],$PRE.state[23],state[22],$PRE.state[22],state[21],$PRE.state[21],state[20],$PRE.state[20],state[19],$PRE.state[19],state[18],$PRE.state[18],state[17],$PRE.state[17],state[16],$PRE.state[16],state[15],$PRE.state[15],state[14],$PRE.state[14],state[13],$PRE.state[13],state[12],$PRE.state[12],state[11],$PRE.state[11],state[10],$PRE.state[10],state[9],$PRE.state[9],state[8],$PRE.state[8],state[7],$PRE.state[7],state[6],$PRE.state[6],state[5],$PRE.state[5],state[4],$PRE.state[4],state[3],$PRE.state[3],state[2],$PRE.state[2],state[1],$PRE.state[1],r,$PRE.r,$whenCondition1,$outputAlias_y,$PRE.$outputAlias_y,y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (42):
 * Single equations (assignments): 41
 * Array equations: 1
 * 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 0.000198/0.4115, allocations: 182.2 kB / 1.332 GB, free: 11.29 MB / 1.029 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 1.968e-05/0.4115, allocations: 15.91 kB / 1.332 GB, free: 11.28 MB / 1.029 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 2.97e-05/0.4116, allocations: 9.609 kB / 1.332 GB, free: 11.26 MB / 1.029 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.953e-06/0.4116, allocations: 0 / 1.332 GB, free: 11.26 MB / 1.029 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 4.248e-06/0.4116, allocations: 0 / 1.332 GB, free: 11.26 MB / 1.029 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.685e-06/0.4116, allocations: 0 / 1.332 GB, free: 11.26 MB / 1.029 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0006867/0.4123, allocations: 0.6072 MB / 1.333 GB, free: 10.61 MB / 1.029 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.346e-06/0.4123, allocations: 8 kB / 1.333 GB, free: 10.6 MB / 1.029 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 1.469e-05/0.4123, allocations: 0 / 1.333 GB, free: 10.6 MB / 1.029 GB
Notification: Performance of postOpt tearingSystem (simulation): time 1.933e-06/0.4123, allocations: 0 / 1.333 GB, free: 10.6 MB / 1.029 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.114e-05/0.4123, allocations: 4 kB / 1.333 GB, free: 10.59 MB / 1.029 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.383e-06/0.4123, allocations: 0 / 1.333 GB, free: 10.59 MB / 1.029 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 9.31e-07/0.4123, allocations: 0 / 1.333 GB, free: 10.59 MB / 1.029 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0005334/0.4128, allocations: 487.1 kB / 1.333 GB, free: 10.1 MB / 1.029 GB
Notification: Performance of postOpt removeConstants (simulation): time 2.401e-05/0.4129, allocations: 19.97 kB / 1.333 GB, free: 10.08 MB / 1.029 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.501e-05/0.4129, allocations: 31.98 kB / 1.333 GB, free: 10.05 MB / 1.029 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 4.623e-05/0.4129, allocations: 0 / 1.333 GB, free: 10.05 MB / 1.029 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 2.418e-05/0.413, allocations: 7.938 kB / 1.333 GB, free: 10.04 MB / 1.029 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.612e-06/0.413, allocations: 4 kB / 1.333 GB, free: 10.04 MB / 1.029 GB
Notification: Performance of sorting global known variables: time 4.861e-05/0.413, allocations: 83.27 kB / 1.333 GB, free: 9.957 MB / 1.029 GB
Notification: Performance of sort global known variables: time 8e-08/0.413, allocations: 0 / 1.333 GB, free: 9.957 MB / 1.029 GB
Notification: Performance of remove unused functions: time 0.0003502/0.4134, allocations: 59.86 kB / 1.333 GB, free: 9.898 MB / 1.029 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 0 ()
 * Number of discrete variables: 37 ($whenCondition1,y,$outputAlias_y,state[1],state[2],state[3],state[4],state[5],state[6],state[7],state[8],state[9],state[10],state[11],state[12],state[13],state[14],state[15],state[16],state[17],state[18],state[19],state[20],state[21],state[22],state[23],state[24],state[25],state[26],state[27],state[28],state[29],state[30],state[31],state[32],state[33],r)
 * Number of discrete states: 33 (state[1],state[2],state[3],state[4],state[5],state[6],state[7],state[8],state[9],state[10],state[11],state[12],state[13],state[14],state[15],state[16],state[17],state[18],state[19],state[20],state[21],state[22],state[23],state[24],state[25],state[26],state[27],state[28],state[29],state[30],state[31],state[32],state[33])
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (5):
 * Single equations (assignments): 3
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 2
 * 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 0.001364/0.4147, allocations: 1.243 MB / 1.335 GB, free: 8.645 MB / 1.029 GB
Notification: Performance of simCode: created initialization part: time 0.0004091/0.4151, allocations: 273.2 kB / 1.335 GB, free: 8.379 MB / 1.029 GB
Notification: Performance of simCode: created event and clocks part: time 1.763e-06/0.4151, allocations: 0 / 1.335 GB, free: 8.379 MB / 1.029 GB
Notification: Performance of simCode: created simulation system equations: time 9.549e-05/0.4152, allocations: 79.91 kB / 1.335 GB, free: 8.301 MB / 1.029 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0002178/0.4155, allocations: 4 kB / 1.335 GB, free: 8.297 MB / 1.029 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002756/0.4182, allocations: 2.533 MB / 1.337 GB, free: 5.66 MB / 1.029 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003649/0.4186, allocations: 0.7166 MB / 1.338 GB, free: 4.918 MB / 1.029 GB
Notification: Performance of simCode: alias equations: time 4.375e-05/0.4186, allocations: 21.08 kB / 1.338 GB, free: 4.898 MB / 1.029 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 6.505e-05/0.4187, allocations: 35.42 kB / 1.338 GB, free: 4.863 MB / 1.029 GB
Notification: Performance of SimCode: time 5.61e-07/0.4187, allocations: 0 / 1.338 GB, free: 4.863 MB / 1.029 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03124/0.4499, allocations: 3.605 MB / 1.342 GB, free: 1.387 MB / 1.029 GB
Notification: Performance of buildModelFMU: Generate platform static: time 10.98/11.43, allocations: 10 kB / 1.342 GB, free: 1.383 MB / 1.029 GB
"
[Timeout remaining time 288]
(rm -f Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.pipe ; mkfifo Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.pipe ; head -c 1048576 < Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.pipe >> ../files/Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.sim & python3 -m fmpy simulate  --output-file Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF_res.csv --start-time 0 --stop-time 1 --timeout 400 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.0004 Buildings_12_Buildings_Occupants_BaseClasses_Validation_Weibull1DOFF.fmu > Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.pipe 2>&1) [Timeout 420.0]
diffSimulationResults("Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF_res.csv","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Occupants_BaseClasses_Validation_Weibull1DOFF.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Occupants.BaseClasses.Validation.Weibull1DOFF.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: 18.635466595000253]