Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.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 0.0007846/0.0007846, allocations: 76.44 kB / 19.17 MB, free: 0.7383 MB / 13.93 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 0.0008516/0.0008516, allocations: 173.2 kB / 22.46 MB, free: 2.098 MB / 18.57 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 0.8822/0.8822, allocations: 177.1 MB / 202.8 MB, free: 5.746 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.2-maint.12.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.2-maint.12.x/package.mo): time 1.731/1.731, allocations: 377.8 MB / 0.6221 GB, free: 8.633 MB / 0.5886 GB " [Timeout remaining time 178] Using package Buildings with version 12.1.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.2-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.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat,fileNamePrefix="Buildings_12_Buildings_Applications_DataCenters_ChillerCooled_Controls_Validation_Reheat",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat,fileNamePrefix="Buildings_12_Buildings_Applications_DataCenters_ChillerCooled_Controls_Validation_Reheat",fmuType="me",version="2.0",platforms={"static"}) [Timeout 300] "Notification: Performance of FrontEnd - loaded program: time 1.112e-06/1.112e-06, allocations: 0 / 0.9809 GB, free: 2.57 MB / 0.9323 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.614e-05/1.725e-05, allocations: 2.281 kB / 0.9809 GB, free: 2.566 MB / 0.9323 GB Notification: Performance of NFInst.instantiate(Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat): time 0.002296/0.002313, allocations: 2.012 MB / 0.9829 GB, free: 0.543 MB / 0.9323 GB Notification: Performance of NFInst.instExpressions: time 0.000967/0.00328, allocations: 0.7557 MB / 0.9836 GB, free: 15.78 MB / 0.948 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001028/0.003383, allocations: 7.938 kB / 0.9837 GB, free: 15.77 MB / 0.948 GB Notification: Performance of NFTyping.typeComponents: time 0.0001282/0.003511, allocations: 35.59 kB / 0.9837 GB, free: 15.74 MB / 0.948 GB Notification: Performance of NFTyping.typeBindings: time 8.083e-05/0.003592, allocations: 43.53 kB / 0.9837 GB, free: 15.7 MB / 0.948 GB Notification: Performance of NFTyping.typeClassSections: time 0.0004052/0.003997, allocations: 179.6 kB / 0.9839 GB, free: 15.52 MB / 0.948 GB Notification: Performance of NFFlatten.flatten: time 0.0003141/0.004311, allocations: 419 kB / 0.9843 GB, free: 15.11 MB / 0.948 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0002486/0.00456, allocations: 204.4 kB / 0.9845 GB, free: 14.91 MB / 0.948 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0002334/0.004794, allocations: 215.5 kB / 0.9847 GB, free: 14.7 MB / 0.948 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001275/0.004921, allocations: 107.7 kB / 0.9848 GB, free: 14.59 MB / 0.948 GB Notification: Performance of NFPackage.collectConstants: time 3.842e-05/0.004959, allocations: 40 kB / 0.9848 GB, free: 14.55 MB / 0.948 GB Notification: Performance of NFFlatten.collectFunctions: time 6.834e-05/0.005028, allocations: 44 kB / 0.9849 GB, free: 14.51 MB / 0.948 GB Notification: Performance of NFScalarize.scalarize: time 5.785e-05/0.005086, allocations: 87.66 kB / 0.985 GB, free: 14.43 MB / 0.948 GB Notification: Performance of NFVerifyModel.verify: time 7.674e-05/0.005162, allocations: 103.7 kB / 0.9851 GB, free: 14.32 MB / 0.948 GB Notification: Performance of NFConvertDAE.convert: time 0.0003179/0.00548, allocations: 442.7 kB / 0.9855 GB, free: 13.89 MB / 0.948 GB Notification: Performance of FrontEnd - DAE generated: time 3.206e-06/0.005483, allocations: 0 / 0.9855 GB, free: 13.89 MB / 0.948 GB Notification: Performance of FrontEnd: time 1.122e-06/0.005485, allocations: 0 / 0.9855 GB, free: 13.89 MB / 0.948 GB Notification: Performance of Transformations before backend: time 4.97e-06/0.00549, allocations: 0 / 0.9855 GB, free: 13.89 MB / 0.948 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 68 * Number of variables: 68 Notification: Performance of Generate backend data structure: time 0.0005844/0.006074, allocations: 0.5037 MB / 0.986 GB, free: 13.36 MB / 0.948 GB Notification: Performance of prepare preOptimizeDAE: time 3.586e-05/0.00611, allocations: 8.031 kB / 0.986 GB, free: 13.35 MB / 0.948 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 5.055e-05/0.00616, allocations: 74.66 kB / 0.9861 GB, free: 13.27 MB / 0.948 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002491/0.006409, allocations: 64.7 kB / 0.9861 GB, free: 13.21 MB / 0.948 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002959/0.006705, allocations: 229.8 kB / 0.9863 GB, free: 12.96 MB / 0.948 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.35e-05/0.006729, allocations: 21.03 kB / 0.9864 GB, free: 12.94 MB / 0.948 GB Notification: Performance of preOpt expandDerOperator (simulation): time 3.306e-05/0.006762, allocations: 36.36 kB / 0.9864 GB, free: 12.9 MB / 0.948 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0003895/0.007151, allocations: 309.6 kB / 0.9867 GB, free: 12.59 MB / 0.948 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.084e-05/0.007162, allocations: 192 / 0.9867 GB, free: 12.59 MB / 0.948 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.083e-05/0.007183, allocations: 12.12 kB / 0.9867 GB, free: 12.57 MB / 0.948 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.216e-06/0.007191, allocations: 8 kB / 0.9867 GB, free: 12.57 MB / 0.948 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003084/0.0075, allocations: 238.4 kB / 0.9869 GB, free: 12.34 MB / 0.948 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0008976/0.008397, allocations: 0.8126 MB / 0.9877 GB, free: 11.46 MB / 0.948 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0003814/0.008779, allocations: 220.8 kB / 0.9879 GB, free: 11.24 MB / 0.948 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000127/0.008906, allocations: 105.3 kB / 0.988 GB, free: 11.14 MB / 0.948 GB Notification: Performance of preOpt evalFunc (simulation): time 2.052e-05/0.008926, allocations: 12.17 kB / 0.9881 GB, free: 11.12 MB / 0.948 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.000191/0.009117, allocations: 163.4 kB / 0.9882 GB, free: 10.95 MB / 0.948 GB Notification: Performance of pre-optimization done (n=30): time 1.433e-06/0.009119, allocations: 0 / 0.9882 GB, free: 10.95 MB / 0.948 GB Notification: Performance of matching and sorting (n=30): time 0.0004483/0.009567, allocations: 323.2 kB / 0.9885 GB, free: 10.63 MB / 0.948 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.571e-05/0.009603, allocations: 55.41 kB / 0.9886 GB, free: 10.57 MB / 0.948 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001315/0.009734, allocations: 220 kB / 0.9888 GB, free: 10.34 MB / 0.948 GB Notification: Performance of collectPreVariables (initialization): time 2.396e-05/0.009758, allocations: 37.7 kB / 0.9888 GB, free: 10.3 MB / 0.948 GB Notification: Performance of collectInitialEqns (initialization): time 7.702e-05/0.009835, allocations: 156.8 kB / 0.989 GB, free: 10.14 MB / 0.948 GB Notification: Performance of collectInitialBindings (initialization): time 4.597e-05/0.009881, allocations: 83.38 kB / 0.989 GB, free: 10.06 MB / 0.948 GB Notification: Performance of simplifyInitialFunctions (initialization): time 7.381e-05/0.009955, allocations: 77.67 kB / 0.9891 GB, free: 9.977 MB / 0.948 GB Notification: Performance of setup shared object (initialization): time 9.339e-05/0.01005, allocations: 338.8 kB / 0.9894 GB, free: 9.637 MB / 0.948 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001239/0.01017, allocations: 91.95 kB / 0.9895 GB, free: 9.547 MB / 0.948 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001418/0.01031, allocations: 145.8 kB / 0.9897 GB, free: 9.387 MB / 0.948 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0002326/0.01055, allocations: 222 kB / 0.9899 GB, free: 9.152 MB / 0.948 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.687e-06/0.01055, allocations: 3.984 kB / 0.9899 GB, free: 9.148 MB / 0.948 GB Notification: Performance of matching and sorting (n=43) (initialization): time 0.0003224/0.01087, allocations: 304.8 kB / 0.9902 GB, free: 8.844 MB / 0.948 GB Notification: Performance of prepare postOptimizeDAE: time 1.248e-05/0.01089, allocations: 4 kB / 0.9902 GB, free: 8.84 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.763e-06/0.01089, allocations: 4 kB / 0.9902 GB, free: 8.836 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.139e-05/0.0109, allocations: 160 / 0.9902 GB, free: 8.836 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001149/0.01102, allocations: 47.91 kB / 0.9902 GB, free: 8.789 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.813e-06/0.01102, allocations: 4 kB / 0.9902 GB, free: 8.785 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001013/0.01113, allocations: 47.75 kB / 0.9903 GB, free: 8.738 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.306e-05/0.01114, allocations: 8 kB / 0.9903 GB, free: 8.73 MB / 0.948 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 31 ($PRE.heaCon.offToOn.enableFire,$PRE.heaCon.onToOff.enableFire,heaCon.stateGraphRoot.activeSteps,heaCon.onToOff.t_start,$PRE.heaCon.onToOff.t_start,heaCon.onToOff.fire,heaCon.onToOff.enableFire,heaCon.onToOff.localCondition,heaCon.offToOn.t_start,$PRE.heaCon.offToOn.t_start,heaCon.offToOn.fire,heaCon.offToOn.enableFire,heaCon.offToOn.localCondition,heaCon.on.active,heaCon.on.oldActive,$PRE.heaCon.on.oldActive,heaCon.on.newActive,$PRE.heaCon.on.newActive,heaCon.on.localActive,$PRE.heaCon.on.localActive,heaCon.off.active,heaCon.off.oldActive,$PRE.heaCon.off.oldActive,heaCon.off.newActive,$PRE.heaCon.off.newActive,heaCon.off.localActive,$PRE.heaCon.off.localActive,$whenCondition1,$whenCondition2,heaCon.stateGraphRoot.resume,heaCon.stateGraphRoot.suspend) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (43): * Single equations (assignments): 43 * 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 0.0001157/0.01126, allocations: 169.8 kB / 0.9904 GB, free: 8.559 MB / 0.948 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 2.178e-05/0.01128, allocations: 27.8 kB / 0.9905 GB, free: 8.531 MB / 0.948 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 4.388e-05/0.01132, allocations: 34.64 kB / 0.9905 GB, free: 8.496 MB / 0.948 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.986e-06/0.01132, allocations: 4 kB / 0.9905 GB, free: 8.492 MB / 0.948 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.528e-06/0.01133, allocations: 0 / 0.9905 GB, free: 8.492 MB / 0.948 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.839e-06/0.01133, allocations: 3.984 kB / 0.9905 GB, free: 8.488 MB / 0.948 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0006188/0.01195, allocations: 0.6539 MB / 0.9912 GB, free: 7.785 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.432e-06/0.01195, allocations: 0 / 0.9912 GB, free: 7.785 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 7.171e-05/0.01203, allocations: 27.92 kB / 0.9912 GB, free: 7.758 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (simulation): time 3.357e-06/0.01203, allocations: 4 kB / 0.9912 GB, free: 7.754 MB / 0.948 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.327e-05/0.01204, allocations: 12 kB / 0.9912 GB, free: 7.742 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.353e-06/0.01204, allocations: 0 / 0.9912 GB, free: 7.742 MB / 0.948 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.643e-06/0.01204, allocations: 4 kB / 0.9912 GB, free: 7.738 MB / 0.948 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002851/0.01233, allocations: 352.1 kB / 0.9915 GB, free: 7.379 MB / 0.948 GB Notification: Performance of postOpt removeConstants (simulation): time 1.637e-05/0.01235, allocations: 19.84 kB / 0.9916 GB, free: 7.359 MB / 0.948 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.134e-05/0.01237, allocations: 7.984 kB / 0.9916 GB, free: 7.352 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 9.524e-05/0.01246, allocations: 23.97 kB / 0.9916 GB, free: 7.328 MB / 0.948 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.278e-05/0.01254, allocations: 39.94 kB / 0.9916 GB, free: 7.289 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.116e-05/0.01255, allocations: 12 kB / 0.9916 GB, free: 7.277 MB / 0.948 GB Notification: Performance of sorting global known variables: time 6.992e-05/0.01262, allocations: 139.3 kB / 0.9918 GB, free: 7.141 MB / 0.948 GB Notification: Performance of sort global known variables: time 5e-08/0.01262, allocations: 0 / 0.9918 GB, free: 7.141 MB / 0.948 GB Notification: Performance of remove unused functions: time 0.0002115/0.01283, allocations: 63.84 kB / 0.9918 GB, free: 7.078 MB / 0.948 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 19 (heaCon.onToOff.enableFire,heaCon.offToOn.enableFire,heaCon.on.active,heaCon.off.active,$whenCondition2,$whenCondition1,heaCon.off.localActive,heaCon.off.newActive,heaCon.off.oldActive,heaCon.on.localActive,heaCon.on.newActive,heaCon.on.oldActive,heaCon.offToOn.localCondition,heaCon.offToOn.fire,heaCon.offToOn.t_start,heaCon.onToOff.localCondition,heaCon.onToOff.fire,heaCon.onToOff.t_start,heaCon.stateGraphRoot.activeSteps) * Number of discrete states: 2 (heaCon.off.newActive,heaCon.on.newActive) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (30): * Single equations (assignments): 26 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 4 * 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 0.0004812/0.01331, allocations: 0.8907 MB / 0.9927 GB, free: 6.164 MB / 0.948 GB Notification: Performance of simCode: created initialization part: time 0.0003168/0.01363, allocations: 236 kB / 0.9929 GB, free: 5.934 MB / 0.948 GB Notification: Performance of simCode: created event and clocks part: time 1.643e-06/0.01363, allocations: 0 / 0.9929 GB, free: 5.934 MB / 0.948 GB Notification: Performance of simCode: created simulation system equations: time 0.0001368/0.01376, allocations: 107.9 kB / 0.993 GB, free: 5.828 MB / 0.948 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0002566/0.01402, allocations: 39.08 kB / 0.9931 GB, free: 5.793 MB / 0.948 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002226/0.01625, allocations: 2.562 MB / 0.9956 GB, free: 3.117 MB / 0.948 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 9.698e-05/0.01634, allocations: 150.8 kB / 0.9957 GB, free: 2.949 MB / 0.948 GB Notification: Performance of simCode: alias equations: time 7.556e-05/0.01642, allocations: 26.28 kB / 0.9957 GB, free: 2.926 MB / 0.948 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001108/0.01653, allocations: 88.47 kB / 0.9958 GB, free: 2.836 MB / 0.948 GB Notification: Performance of SimCode: time 5.71e-07/0.01653, allocations: 4 kB / 0.9958 GB, free: 2.832 MB / 0.948 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.01792/0.03446, allocations: 6.286 MB / 1.002 GB, free: 12.75 MB / 0.9636 GB Notification: Performance of buildModelFMU: Generate platform static: time 6.903/6.937, allocations: 5.078 kB / 1.002 GB, free: 12.74 MB / 0.9636 GB " [Timeout remaining time 293] (rm -f Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.pipe ; mkfifo Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.pipe ; head -c 1048576 < Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.pipe >> ../files/Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat_res.mat --tempDir=temp_Buildings_12_Buildings_Applications_DataCenters_ChillerCooled_Controls_Validation_Reheat_fmu --startTime=0 --stopTime=1200 --stepSize=0.48 --timeout=400 --tolerance=1e-06 Buildings_12_Buildings_Applications_DataCenters_ChillerCooled_Controls_Validation_Reheat.fmu > Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.pipe 2>&1) [Timeout 420.0] diffSimulationResults("Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Applications_DataCenters_ChillerCooled_Controls_Validation_Reheat.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Applications.DataCenters.ChillerCooled.Controls.Validation.Reheat.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: 10.862040827982128]