Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.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 0.001763/0.001763, allocations: 77.55 kB / 19.76 MB, free: 2.027 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 0.00219/0.00219, allocations: 162.4 kB / 23.02 MB, free: 4.949 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 1.537/1.537, allocations: 177.2 MB / 203.4 MB, free: 8.961 MB / 190.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.x/package.mo): time 2.669/2.669, allocations: 359.1 MB / 0.6044 GB, free: 14.86 MB / 0.5762 GB " [Timeout remaining time 177] Using package Buildings with version 11.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.1.1-maint.11.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: translateModel(Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|TGla.T|TRoo.T|con.u|heaFloSen.Q_flow",fileNamePrefix="Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection") translateModel(Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|TGla.T|TRoo.T|con.u|heaFloSen.Q_flow",fileNamePrefix="Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection") [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 0.002914/0.002914, allocations: 67.89 kB / 0.9515 GB, free: 12.78 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2937/0.2966, allocations: 169.9 MB / 1.117 GB, free: 2.539 MB / 1.061 GB Notification: Performance of NFInst.instantiate(Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection): time 0.003404/0.3, allocations: 1.847 MB / 1.119 GB, free: 0.6797 MB / 1.061 GB Notification: Performance of NFInst.instExpressions: time 0.001477/0.3015, allocations: 0.7363 MB / 1.12 GB, free: 15.94 MB / 1.076 GB Notification: Performance of NFInst.updateImplicitVariability: time 9.068e-05/0.3016, allocations: 0 / 1.12 GB, free: 15.94 MB / 1.076 GB Notification: Performance of NFTyping.typeComponents: time 5.533e-05/0.3016, allocations: 15.86 kB / 1.12 GB, free: 15.92 MB / 1.076 GB Notification: Performance of NFTyping.typeBindings: time 0.0002913/0.3019, allocations: 47.62 kB / 1.12 GB, free: 15.88 MB / 1.076 GB Notification: Performance of NFTyping.typeClassSections: time 0.0002193/0.3022, allocations: 75.8 kB / 1.12 GB, free: 15.8 MB / 1.076 GB Notification: Performance of NFFlatten.flatten: time 0.0003549/0.3025, allocations: 139.4 kB / 1.12 GB, free: 15.66 MB / 1.076 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0001143/0.3026, allocations: 37.5 kB / 1.12 GB, free: 15.62 MB / 1.076 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001447/0.3028, allocations: 59.8 kB / 1.12 GB, free: 15.57 MB / 1.076 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001133/0.3029, allocations: 47.77 kB / 1.12 GB, free: 15.52 MB / 1.076 GB Notification: Performance of NFPackage.collectConstants: time 2.525e-05/0.3029, allocations: 8 kB / 1.12 GB, free: 15.51 MB / 1.076 GB Notification: Performance of NFFlatten.collectFunctions: time 6.319e-05/0.303, allocations: 15.98 kB / 1.12 GB, free: 15.5 MB / 1.076 GB Notification: Performance of NFScalarize.scalarize: time 2.449e-05/0.303, allocations: 15.94 kB / 1.12 GB, free: 15.48 MB / 1.076 GB Notification: Performance of NFVerifyModel.verify: time 5.733e-05/0.3031, allocations: 43.8 kB / 1.12 GB, free: 15.44 MB / 1.076 GB Notification: Performance of NFConvertDAE.convert: time 0.0001974/0.3033, allocations: 115.5 kB / 1.121 GB, free: 15.32 MB / 1.076 GB Notification: Performance of FrontEnd - DAE generated: time 3.857e-06/0.3033, allocations: 0 / 1.121 GB, free: 15.32 MB / 1.076 GB Notification: Performance of FrontEnd: time 1.282e-06/0.3033, allocations: 0 / 1.121 GB, free: 15.32 MB / 1.076 GB Notification: Performance of Transformations before backend: time 4.669e-06/0.3033, allocations: 0 / 1.121 GB, free: 15.32 MB / 1.076 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 18 * Number of variables: 18 Notification: Performance of Generate backend data structure: time 0.0005699/0.3038, allocations: 337.9 kB / 1.121 GB, free: 14.96 MB / 1.076 GB Notification: Performance of prepare preOptimizeDAE: time 3.537e-05/0.3039, allocations: 8.031 kB / 1.121 GB, free: 14.96 MB / 1.076 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 4.55e-05/0.3039, allocations: 12.89 kB / 1.121 GB, free: 14.95 MB / 1.076 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002505/0.3042, allocations: 146.2 kB / 1.121 GB, free: 14.78 MB / 1.076 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.621e-05/0.3042, allocations: 8.375 kB / 1.121 GB, free: 14.77 MB / 1.076 GB Notification: Performance of preOpt expandDerOperator (simulation): time 1.754e-05/0.3042, allocations: 4.375 kB / 1.121 GB, free: 14.77 MB / 1.076 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0002615/0.3045, allocations: 105.1 kB / 1.121 GB, free: 14.66 MB / 1.076 GB Notification: Performance of preOpt findStateOrder (simulation): time 8.596e-06/0.3045, allocations: 0 / 1.121 GB, free: 14.66 MB / 1.076 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.318e-05/0.3045, allocations: 7.984 kB / 1.121 GB, free: 14.65 MB / 1.076 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.094e-06/0.3045, allocations: 4 kB / 1.121 GB, free: 14.65 MB / 1.076 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0002272/0.3047, allocations: 63.89 kB / 1.121 GB, free: 14.59 MB / 1.076 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0004774/0.3052, allocations: 284.3 kB / 1.122 GB, free: 14.28 MB / 1.076 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0002345/0.3054, allocations: 50.61 kB / 1.122 GB, free: 14.22 MB / 1.076 GB Notification: Performance of preOpt resolveLoops (simulation): time 9.747e-05/0.3055, allocations: 20.84 kB / 1.122 GB, free: 14.2 MB / 1.076 GB Notification: Performance of preOpt evalFunc (simulation): time 1.531e-05/0.3055, allocations: 4 kB / 1.122 GB, free: 14.19 MB / 1.076 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.649e-05/0.3056, allocations: 38.5 kB / 1.122 GB, free: 14.14 MB / 1.076 GB Notification: Performance of pre-optimization done (n=3): time 9.92e-07/0.3056, allocations: 0 / 1.122 GB, free: 14.14 MB / 1.076 GB Notification: Performance of matching and sorting (n=3): time 0.0003843/0.306, allocations: 101.5 kB / 1.122 GB, free: 14.04 MB / 1.076 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.866e-05/0.306, allocations: 55.39 kB / 1.122 GB, free: 13.97 MB / 1.076 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001263/0.3061, allocations: 129.8 kB / 1.122 GB, free: 13.84 MB / 1.076 GB Notification: Performance of collectPreVariables (initialization): time 1.939e-05/0.3061, allocations: 29.69 kB / 1.122 GB, free: 13.8 MB / 1.076 GB Notification: Performance of collectInitialEqns (initialization): time 7.685e-05/0.3062, allocations: 115.9 kB / 1.122 GB, free: 13.68 MB / 1.076 GB Notification: Performance of collectInitialBindings (initialization): time 1.124e-05/0.3062, allocations: 7.953 kB / 1.122 GB, free: 13.68 MB / 1.076 GB Notification: Performance of simplifyInitialFunctions (initialization): time 3.728e-05/0.3063, allocations: 17.72 kB / 1.122 GB, free: 13.65 MB / 1.076 GB Notification: Performance of setup shared object (initialization): time 0.0001416/0.3064, allocations: 318.8 kB / 1.122 GB, free: 13.33 MB / 1.076 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001175/0.3065, allocations: 24.84 kB / 1.122 GB, free: 13.3 MB / 1.076 GB Notification: Performance of partitionIndependentBlocks (initialization): time 8.994e-05/0.3066, allocations: 23.97 kB / 1.122 GB, free: 13.28 MB / 1.076 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0001746/0.3068, allocations: 44.83 kB / 1.122 GB, free: 13.23 MB / 1.076 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.573e-06/0.3068, allocations: 0 / 1.122 GB, free: 13.23 MB / 1.076 GB Notification: Performance of matching and sorting (n=4) (initialization): time 0.0002433/0.307, allocations: 89.55 kB / 1.123 GB, free: 13.14 MB / 1.076 GB Notification: Performance of prepare postOptimizeDAE: time 1.58e-05/0.307, allocations: 11.94 kB / 1.123 GB, free: 13.13 MB / 1.076 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.851e-06/0.3071, allocations: 3.938 kB / 1.123 GB, free: 13.12 MB / 1.076 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.219e-05/0.3071, allocations: 0 / 1.123 GB, free: 13.12 MB / 1.076 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 8.45e-05/0.3071, allocations: 11.98 kB / 1.123 GB, free: 13.11 MB / 1.076 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.318e-06/0.3072, allocations: 0 / 1.123 GB, free: 13.11 MB / 1.076 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 6.631e-05/0.3072, allocations: 7.984 kB / 1.123 GB, free: 13.11 MB / 1.076 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.095e-06/0.3072, allocations: 4 kB / 1.123 GB, free: 13.1 MB / 1.076 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0001422/0.3074, allocations: 108.1 kB / 1.123 GB, free: 12.99 MB / 1.076 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 7.873e-05/0.3074, allocations: 19.97 kB / 1.123 GB, free: 12.97 MB / 1.076 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0001613/0.3076, allocations: 41.25 kB / 1.123 GB, free: 12.93 MB / 1.076 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 9.51e-07/0.3076, allocations: 4 kB / 1.123 GB, free: 12.93 MB / 1.076 GB Notification: Performance of matching and sorting (n=4) (initialization_lambda0): time 0.0002136/0.3078, allocations: 85.55 kB / 1.123 GB, free: 12.84 MB / 1.076 GB Notification: Performance of prepare postOptimizeDAE: time 1.017e-05/0.3078, allocations: 4 kB / 1.123 GB, free: 12.83 MB / 1.076 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.276e-06/0.3078, allocations: 8.031 kB / 1.123 GB, free: 12.82 MB / 1.076 GB Notification: Performance of postOpt tearingSystem (initialization): time 8.015e-06/0.3078, allocations: 11.92 kB / 1.123 GB, free: 12.81 MB / 1.076 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 6.581e-05/0.3079, allocations: 8 kB / 1.123 GB, free: 12.8 MB / 1.076 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.597e-06/0.3079, allocations: 3.984 kB / 1.123 GB, free: 12.8 MB / 1.076 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 5.787e-05/0.308, allocations: 7.984 kB / 1.123 GB, free: 12.79 MB / 1.076 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.397e-06/0.308, allocations: 0 / 1.123 GB, free: 12.79 MB / 1.076 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 (4): * Single equations (assignments): 4 * 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 0.0001007/0.3081, allocations: 176.3 kB / 1.123 GB, free: 12.61 MB / 1.076 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 2.716e-05/0.3081, allocations: 7.953 kB / 1.123 GB, free: 12.61 MB / 1.076 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002588/0.3084, allocations: 101.8 kB / 1.123 GB, free: 12.5 MB / 1.076 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.515e-06/0.3084, allocations: 0 / 1.123 GB, free: 12.5 MB / 1.076 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.156e-06/0.3084, allocations: 0 / 1.123 GB, free: 12.5 MB / 1.076 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.252e-06/0.3084, allocations: 4 kB / 1.123 GB, free: 12.49 MB / 1.076 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.000171/0.3085, allocations: 137.2 kB / 1.123 GB, free: 12.33 MB / 1.076 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.21e-07/0.3085, allocations: 0 / 1.123 GB, free: 12.33 MB / 1.076 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 6.357e-05/0.3086, allocations: 7.984 kB / 1.123 GB, free: 12.32 MB / 1.076 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.214e-06/0.3086, allocations: 4 kB / 1.123 GB, free: 12.32 MB / 1.076 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.562e-06/0.3086, allocations: 0 / 1.123 GB, free: 12.32 MB / 1.076 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 3.807e-06/0.3086, allocations: 3.938 kB / 1.123 GB, free: 12.31 MB / 1.076 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 8.01e-07/0.3086, allocations: 4 kB / 1.123 GB, free: 12.31 MB / 1.076 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002697/0.3089, allocations: 175.4 kB / 1.123 GB, free: 12.12 MB / 1.076 GB Notification: Performance of postOpt removeConstants (simulation): time 2.723e-05/0.3089, allocations: 7.984 kB / 1.123 GB, free: 12.11 MB / 1.076 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 1.515e-05/0.3089, allocations: 0 / 1.123 GB, free: 12.11 MB / 1.076 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 8.731e-05/0.309, allocations: 7.938 kB / 1.123 GB, free: 12.11 MB / 1.076 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.564e-05/0.3091, allocations: 3.984 kB / 1.123 GB, free: 12.1 MB / 1.076 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.046e-06/0.3091, allocations: 4 kB / 1.123 GB, free: 12.1 MB / 1.076 GB Notification: Performance of sorting global known variables: time 7.897e-05/0.3091, allocations: 101.5 kB / 1.124 GB, free: 12 MB / 1.076 GB Notification: Performance of sort global known variables: time 1e-07/0.3091, allocations: 4 kB / 1.124 GB, free: 12 MB / 1.076 GB Notification: Performance of remove unused functions: time 0.000318/0.3095, allocations: 47.84 kB / 1.124 GB, free: 11.95 MB / 1.076 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 (3): * Single equations (assignments): 3 * 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 0.000147/0.3096, allocations: 99.23 kB / 1.124 GB, free: 11.84 MB / 1.076 GB Notification: Performance of simCode: created initialization part: time 0.0003157/0.3099, allocations: 71.81 kB / 1.124 GB, free: 11.77 MB / 1.076 GB Notification: Performance of simCode: created event and clocks part: time 1.973e-06/0.3099, allocations: 0 / 1.124 GB, free: 11.77 MB / 1.076 GB Notification: Performance of simCode: created simulation system equations: time 9.633e-05/0.31, allocations: 23.97 kB / 1.124 GB, free: 11.75 MB / 1.076 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003113/0.3103, allocations: 16 kB / 1.124 GB, free: 11.73 MB / 1.076 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0004353/0.3108, allocations: 217.5 kB / 1.124 GB, free: 11.49 MB / 1.076 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 8.111e-05/0.3108, allocations: 84.28 kB / 1.124 GB, free: 11.39 MB / 1.076 GB Notification: Performance of simCode: alias equations: time 4.096e-05/0.3109, allocations: 7.984 kB / 1.124 GB, free: 11.38 MB / 1.076 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 2.805e-05/0.3109, allocations: 16.5 kB / 1.124 GB, free: 11.36 MB / 1.076 GB Notification: Performance of SimCode: time 3.51e-07/0.3109, allocations: 0 / 1.124 GB, free: 11.36 MB / 1.076 GB Notification: Performance of Templates: time 0.003864/0.3148, allocations: 0.9618 MB / 1.125 GB, free: 10.43 MB / 1.076 GB " [Timeout remaining time 300] make -j1 -f Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.makefile [Timeout 300] (rm -f Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.pipe ; mkfifo Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.pipe ; head -c 1048576 < Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.pipe >> ../files/Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.sim & ./Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection -abortSlowSimulation -alarm=400 -s ida -emit_protected -lv LOG_STATS > Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.pipe 2>&1) [Timeout 400] diffSimulationResults("Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_11.x/Buildings_HeatTransfer_Windows_BaseClasses_Examples_InteriorConvection.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_11_Buildings.HeatTransfer.Windows.BaseClasses.Examples.InteriorConvection.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: 8.370130887022242]