Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.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 0.001335/0.001335, allocations: 108.8 kB / 16.45 MB, free: 6.508 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 0.001459/0.001459, allocations: 213.7 kB / 19.43 MB, free: 3.648 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 1.439/1.439, allocations: 230.6 MB / 252.8 MB, free: 9.105 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 3.274/3.274, allocations: 0.49 GB / 0.7916 GB, free: 33.42 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.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow,fileNamePrefix="Buildings_12_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_DualDuctSnapActing_Subsequences_Validation_ActiveAirFlow",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow,fileNamePrefix="Buildings_12_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_DualDuctSnapActing_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 0.002137/0.002137, allocations: 68.69 kB / 1.149 GB, free: 26.39 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3657/0.3679, allocations: 176.1 MB / 1.321 GB, free: 3.285 MB / 1.014 GB Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow): time 0.002562/0.3704, allocations: 1.144 MB / 1.322 GB, free: 2.141 MB / 1.014 GB Notification: Performance of NFInst.instExpressions: time 0.001433/0.3719, allocations: 1.065 MB / 1.323 GB, free: 1.062 MB / 1.014 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001251/0.372, allocations: 4 kB / 1.323 GB, free: 1.059 MB / 1.014 GB Notification: Performance of NFTyping.typeComponents: time 7.136e-05/0.3721, allocations: 23.67 kB / 1.323 GB, free: 1.035 MB / 1.014 GB Notification: Performance of NFTyping.typeBindings: time 0.0001301/0.3722, allocations: 31.72 kB / 1.323 GB, free: 1.004 MB / 1.014 GB Notification: Performance of NFTyping.typeClassSections: time 0.0002633/0.3725, allocations: 87.8 kB / 1.323 GB, free: 0.918 MB / 1.014 GB Notification: Performance of NFFlatten.flatten: time 0.0002835/0.3727, allocations: 236.2 kB / 1.323 GB, free: 0.6836 MB / 1.014 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0002168/0.373, allocations: 92.14 kB / 1.323 GB, free: 0.5938 MB / 1.014 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00025/0.3732, allocations: 103.6 kB / 1.324 GB, free: 0.4922 MB / 1.014 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001473/0.3734, allocations: 103.5 kB / 1.324 GB, free: 400 kB / 1.014 GB Notification: Performance of NFPackage.collectConstants: time 4.012e-05/0.3734, allocations: 28 kB / 1.324 GB, free: 372 kB / 1.014 GB Notification: Performance of NFFlatten.collectFunctions: time 6.099e-05/0.3735, allocations: 24 kB / 1.324 GB, free: 348 kB / 1.014 GB Notification: Performance of NFScalarize.scalarize: time 5.048e-05/0.3735, allocations: 55.83 kB / 1.324 GB, free: 292 kB / 1.014 GB Notification: Performance of NFVerifyModel.verify: time 9.602e-05/0.3736, allocations: 99.47 kB / 1.324 GB, free: 192 kB / 1.014 GB Notification: Performance of NFConvertDAE.convert: time 0.0003948/0.374, allocations: 314.9 kB / 1.324 GB, free: 15.88 MB / 1.029 GB Notification: Performance of FrontEnd - DAE generated: time 3.396e-06/0.374, allocations: 0 / 1.324 GB, free: 15.88 MB / 1.029 GB Notification: Performance of FrontEnd: time 1.553e-06/0.374, allocations: 0 / 1.324 GB, free: 15.88 MB / 1.029 GB Notification: Performance of Transformations before backend: time 8.316e-06/0.374, allocations: 4 kB / 1.324 GB, free: 15.88 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: 52 * Number of variables: 52 Notification: Performance of Generate backend data structure: time 0.0007798/0.3748, allocations: 0.4988 MB / 1.325 GB, free: 15.32 MB / 1.029 GB Notification: Performance of prepare preOptimizeDAE: time 4.53e-05/0.3748, allocations: 15.98 kB / 1.325 GB, free: 15.31 MB / 1.029 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 6.19e-05/0.3749, allocations: 50.73 kB / 1.325 GB, free: 15.25 MB / 1.029 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001632/0.3751, allocations: 36.78 kB / 1.325 GB, free: 15.21 MB / 1.029 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004894/0.3756, allocations: 282.5 kB / 1.325 GB, free: 14.9 MB / 1.029 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.581e-05/0.3756, allocations: 12.81 kB / 1.325 GB, free: 14.89 MB / 1.029 GB Notification: Performance of preOpt expandDerOperator (simulation): time 3.223e-05/0.3756, allocations: 20.38 kB / 1.325 GB, free: 14.87 MB / 1.029 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004701/0.3761, allocations: 199.8 kB / 1.325 GB, free: 14.67 MB / 1.029 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.098e-05/0.3761, allocations: 3.938 kB / 1.325 GB, free: 14.66 MB / 1.029 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.388e-05/0.3761, allocations: 8 kB / 1.325 GB, free: 14.66 MB / 1.029 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.977e-06/0.3761, allocations: 8 kB / 1.325 GB, free: 14.65 MB / 1.029 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004438/0.3766, allocations: 157.6 kB / 1.325 GB, free: 14.49 MB / 1.029 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0008817/0.3775, allocations: 0.5957 MB / 1.326 GB, free: 13.85 MB / 1.029 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0003805/0.3778, allocations: 150.6 kB / 1.326 GB, free: 13.69 MB / 1.029 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001833/0.378, allocations: 56.83 kB / 1.326 GB, free: 13.63 MB / 1.029 GB Notification: Performance of preOpt evalFunc (simulation): time 2.473e-05/0.378, allocations: 7.906 kB / 1.326 GB, free: 13.62 MB / 1.029 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.975e-05/0.3781, allocations: 46.44 kB / 1.326 GB, free: 13.57 MB / 1.029 GB Notification: Performance of pre-optimization done (n=17): time 1.342e-06/0.3781, allocations: 0 / 1.326 GB, free: 13.57 MB / 1.029 GB Notification: Performance of matching and sorting (n=17): time 0.0006502/0.3787, allocations: 215.5 kB / 1.326 GB, free: 13.36 MB / 1.029 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.133e-05/0.3788, allocations: 51.41 kB / 1.326 GB, free: 13.29 MB / 1.029 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001811/0.3789, allocations: 186.8 kB / 1.327 GB, free: 13.1 MB / 1.029 GB Notification: Performance of collectPreVariables (initialization): time 1.93e-05/0.379, allocations: 25.7 kB / 1.327 GB, free: 13.07 MB / 1.029 GB Notification: Performance of collectInitialEqns (initialization): time 9.578e-05/0.3791, allocations: 136.5 kB / 1.327 GB, free: 12.93 MB / 1.029 GB Notification: Performance of collectInitialBindings (initialization): time 4.548e-05/0.3791, allocations: 47.62 kB / 1.327 GB, free: 12.89 MB / 1.029 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.811e-05/0.3792, allocations: 53.69 kB / 1.327 GB, free: 12.83 MB / 1.029 GB Notification: Performance of setup shared object (initialization): time 0.0001468/0.3793, allocations: 326.8 kB / 1.327 GB, free: 12.5 MB / 1.029 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001795/0.3795, allocations: 55.95 kB / 1.327 GB, free: 12.45 MB / 1.029 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002118/0.3797, allocations: 111 kB / 1.327 GB, free: 12.32 MB / 1.029 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0003535/0.3801, allocations: 137 kB / 1.328 GB, free: 12.17 MB / 1.029 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.964e-06/0.3801, allocations: 0 / 1.328 GB, free: 12.17 MB / 1.029 GB Notification: Performance of matching and sorting (n=22) (initialization): time 0.0004647/0.3806, allocations: 206.7 kB / 1.328 GB, free: 11.96 MB / 1.029 GB Notification: Performance of prepare postOptimizeDAE: time 1.366e-05/0.3806, allocations: 8.156 kB / 1.328 GB, free: 11.95 MB / 1.029 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.913e-06/0.3806, allocations: 4 kB / 1.328 GB, free: 11.95 MB / 1.029 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.291e-05/0.3806, allocations: 0 / 1.328 GB, free: 11.95 MB / 1.029 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002017/0.3808, allocations: 35.91 kB / 1.328 GB, free: 11.91 MB / 1.029 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.026e-05/0.3808, allocations: 7.984 kB / 1.328 GB, free: 11.91 MB / 1.029 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00012/0.3809, allocations: 23.89 kB / 1.328 GB, free: 11.88 MB / 1.029 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.596e-05/0.3809, allocations: 7.984 kB / 1.328 GB, free: 11.88 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: 15 (reaToInt2.y,actAirSet.or4.y,actAirSet.or2.y,actAirSet.or1.y,actAirSet.ifSetBac.y,actAirSet.ifWarUp.y,actAirSet.ifSetUp.y,actAirSet.ifCooDow.y,actAirSet.ifOcc.y,actAirSet.or3.y,actAirSet.warUpMod.y,actAirSet.setBacMod.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 (22): * Single equations (assignments): 22 * 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 0.0001786/0.3811, allocations: 149.7 kB / 1.328 GB, free: 11.72 MB / 1.029 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.007e-05/0.3812, allocations: 11.91 kB / 1.328 GB, free: 11.71 MB / 1.029 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 5.15e-05/0.3812, allocations: 17.88 kB / 1.328 GB, free: 11.68 MB / 1.029 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.424e-06/0.3812, allocations: 4 kB / 1.328 GB, free: 11.68 MB / 1.029 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.468e-06/0.3812, allocations: 0 / 1.328 GB, free: 11.68 MB / 1.029 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.809e-06/0.3812, allocations: 3.984 kB / 1.328 GB, free: 11.68 MB / 1.029 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.000324/0.3815, allocations: 281.4 kB / 1.328 GB, free: 11.35 MB / 1.029 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.853e-06/0.3815, allocations: 0 / 1.328 GB, free: 11.35 MB / 1.029 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001403/0.3817, allocations: 19.98 kB / 1.328 GB, free: 11.33 MB / 1.029 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.825e-06/0.3817, allocations: 4 kB / 1.328 GB, free: 11.33 MB / 1.029 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.338e-05/0.3817, allocations: 4 kB / 1.328 GB, free: 11.32 MB / 1.029 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 3.847e-06/0.3817, allocations: 4 kB / 1.328 GB, free: 11.32 MB / 1.029 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.685e-06/0.3817, allocations: 3.984 kB / 1.328 GB, free: 11.32 MB / 1.029 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0004583/0.3822, allocations: 261.1 kB / 1.329 GB, free: 11.05 MB / 1.029 GB Notification: Performance of postOpt removeConstants (simulation): time 6.05e-05/0.3822, allocations: 92.95 kB / 1.329 GB, free: 10.94 MB / 1.029 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.071e-05/0.3822, allocations: 4 kB / 1.329 GB, free: 10.93 MB / 1.029 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001224/0.3824, allocations: 11.98 kB / 1.329 GB, free: 10.92 MB / 1.029 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.86e-05/0.3825, allocations: 27.81 kB / 1.329 GB, free: 10.89 MB / 1.029 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.263e-05/0.3825, allocations: 8 kB / 1.329 GB, free: 10.89 MB / 1.029 GB Notification: Performance of sorting global known variables: time 9.775e-05/0.3826, allocations: 124.2 kB / 1.329 GB, free: 10.77 MB / 1.029 GB Notification: Performance of sort global known variables: time 9e-08/0.3826, allocations: 0 / 1.329 GB, free: 10.77 MB / 1.029 GB Notification: Performance of remove unused functions: time 0.000287/0.3828, allocations: 35.89 kB / 1.329 GB, free: 10.73 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: 10 (actAirSet.or3.y,actAirSet.ifOcc.y,actAirSet.ifCooDow.y,actAirSet.ifSetUp.y,actAirSet.ifWarUp.y,actAirSet.ifSetBac.y,actAirSet.or1.y,actAirSet.or2.y,actAirSet.or4.y,reaToInt2.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (17): * Single equations (assignments): 17 * 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 0.000807/0.3837, allocations: 0.8115 MB / 1.33 GB, free: 9.891 MB / 1.029 GB Notification: Performance of simCode: created initialization part: time 0.0004295/0.3841, allocations: 148 kB / 1.33 GB, free: 9.746 MB / 1.029 GB Notification: Performance of simCode: created event and clocks part: time 1.974e-06/0.3841, allocations: 0 / 1.33 GB, free: 9.746 MB / 1.029 GB Notification: Performance of simCode: created simulation system equations: time 0.000198/0.3843, allocations: 71.89 kB / 1.33 GB, free: 9.676 MB / 1.029 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003137/0.3846, allocations: 24.03 kB / 1.33 GB, free: 9.656 MB / 1.029 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00272/0.3873, allocations: 1.976 MB / 1.332 GB, free: 7.57 MB / 1.029 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003569/0.3877, allocations: 0.7397 MB / 1.332 GB, free: 6.805 MB / 1.029 GB Notification: Performance of simCode: alias equations: time 9.866e-05/0.3878, allocations: 21.53 kB / 1.333 GB, free: 6.785 MB / 1.029 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001199/0.3879, allocations: 67.41 kB / 1.333 GB, free: 6.723 MB / 1.029 GB Notification: Performance of SimCode: time 3e-07/0.3879, allocations: 0 / 1.333 GB, free: 6.723 MB / 1.029 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.06002/0.4479, allocations: 3.272 MB / 1.336 GB, free: 3.656 MB / 1.029 GB Notification: Performance of buildModelFMU: Generate platform static: time 8.556/9.004, allocations: 11.52 kB / 1.336 GB, free: 3.648 MB / 1.029 GB " [Timeout remaining time 291] (rm -f Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow.pipe ; mkfifo Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow.pipe ; head -c 1048576 < Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow.pipe >> ../files/Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow_res.mat --tempDir=temp_Buildings_12_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_DualDuctSnapActing_Subsequences_Validation_ActiveAirFlow_fmu --startTime=0 --stopTime=3600 --stepSize=1.44 --timeout=400 --tolerance=1e-06 Buildings_12_Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_DualDuctSnapActing_Subsequences_Validation_ActiveAirFlow.fmu > Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow.pipe 2>&1) [Timeout 420.0] diffSimulationResults("Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.Subsequences.Validation.ActiveAirFlow_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_DualDuctSnapActing_Subsequences_Validation_ActiveAirFlow.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctSnapActing.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: 15.686230385908857]