Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.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 0.001391/0.001391, allocations: 113.3 kB / 17.13 MB, free: 5.926 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 0.001462/0.001462, allocations: 204 kB / 20.09 MB, free: 2.977 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 1.665/1.665, allocations: 230.6 MB / 253.5 MB, free: 15.08 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 2.985/2.985, allocations: 0.49 GB / 0.7923 GB, free: 1.469 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: translateModel(Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|grid.P.real|grid.P.apparent",fileNamePrefix="Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid") translateModel(Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|grid.P.real|grid.P.apparent",fileNamePrefix="Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid") [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 0.002065/0.002065, allocations: 67.91 kB / 1.15 GB, free: 14.91 MB / 0.9356 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.214/1.216, allocations: 176.1 MB / 1.322 GB, free: 25.07 MB / 1.061 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid): time 0.004257/1.22, allocations: 2.942 MB / 1.325 GB, free: 23.07 MB / 1.061 GB Notification: Performance of NFInst.instExpressions: time 0.002691/1.223, allocations: 1.873 MB / 1.327 GB, free: 21.8 MB / 1.061 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001431/1.223, allocations: 9.094 kB / 1.327 GB, free: 21.8 MB / 1.061 GB Notification: Performance of NFTyping.typeComponents: time 0.0007064/1.224, allocations: 228.1 kB / 1.327 GB, free: 21.67 MB / 1.061 GB Notification: Performance of NFTyping.typeBindings: time 0.0004349/1.224, allocations: 204.3 kB / 1.327 GB, free: 21.56 MB / 1.061 GB Notification: Performance of NFTyping.typeClassSections: time 0.0005179/1.225, allocations: 226.8 kB / 1.327 GB, free: 21.45 MB / 1.061 GB Notification: Performance of NFFlatten.flatten: time 0.0004508/1.225, allocations: 324.6 kB / 1.328 GB, free: 21.31 MB / 1.061 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0002946/1.225, allocations: 154.2 kB / 1.328 GB, free: 21.23 MB / 1.061 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0002507/1.226, allocations: 137.3 kB / 1.328 GB, free: 21.18 MB / 1.061 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002664/1.226, allocations: 159.3 kB / 1.328 GB, free: 21.11 MB / 1.061 GB Notification: Performance of NFPackage.collectConstants: time 4.871e-05/1.226, allocations: 21.56 kB / 1.328 GB, free: 21.11 MB / 1.061 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0005939/1.226, allocations: 289.4 kB / 1.328 GB, free: 21.02 MB / 1.061 GB Notification: Performance of NFScalarize.scalarize: time 0.0001119/1.227, allocations: 93.28 kB / 1.328 GB, free: 20.98 MB / 1.061 GB Notification: Performance of NFVerifyModel.verify: time 0.0001386/1.227, allocations: 118 kB / 1.328 GB, free: 20.91 MB / 1.061 GB Notification: Performance of NFConvertDAE.convert: time 0.0006781/1.227, allocations: 446.4 kB / 1.329 GB, free: 20.76 MB / 1.061 GB Notification: Performance of FrontEnd - DAE generated: time 4.608e-06/1.227, allocations: 4.562 kB / 1.329 GB, free: 20.76 MB / 1.061 GB Notification: Performance of FrontEnd: time 2.134e-06/1.227, allocations: 7.938 kB / 1.329 GB, free: 20.75 MB / 1.061 GB Notification: Performance of Transformations before backend: time 8.005e-06/1.227, allocations: 1.062 kB / 1.329 GB, free: 20.75 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: 53 * Number of variables: 53 Notification: Performance of Generate backend data structure: time 0.001097/1.228, allocations: 0.5578 MB / 1.329 GB, free: 20.26 MB / 1.061 GB Notification: Performance of prepare preOptimizeDAE: time 5.382e-05/1.229, allocations: 13.39 kB / 1.329 GB, free: 20.26 MB / 1.061 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001043/1.23, allocations: 112.8 kB / 1.33 GB, free: 20.24 MB / 1.061 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0003786/1.23, allocations: 269 kB / 1.33 GB, free: 19.99 MB / 1.061 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.862e-05/1.23, allocations: 12.34 kB / 1.33 GB, free: 19.99 MB / 1.061 GB Notification: Performance of preOpt expandDerOperator (simulation): time 6.213e-05/1.23, allocations: 16.56 kB / 1.33 GB, free: 19.98 MB / 1.061 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008451/1.231, allocations: 397.5 kB / 1.33 GB, free: 19.77 MB / 1.061 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.698e-05/1.231, allocations: 3.938 kB / 1.33 GB, free: 19.77 MB / 1.061 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.812e-05/1.231, allocations: 11.12 kB / 1.33 GB, free: 19.76 MB / 1.061 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.907e-05/1.231, allocations: 21.08 kB / 1.33 GB, free: 19.76 MB / 1.061 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0007871/1.232, allocations: 344.3 kB / 1.331 GB, free: 19.65 MB / 1.061 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002054/1.234, allocations: 1.757 MB / 1.332 GB, free: 18.19 MB / 1.061 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007889/1.235, allocations: 318.4 kB / 1.333 GB, free: 18.05 MB / 1.061 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003067/1.235, allocations: 144.4 kB / 1.333 GB, free: 17.99 MB / 1.061 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001365/1.235, allocations: 86.66 kB / 1.333 GB, free: 17.9 MB / 1.061 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.582e-05/1.235, allocations: 37.58 kB / 1.333 GB, free: 17.86 MB / 1.061 GB Notification: Performance of pre-optimization done (n=20): time 1.833e-06/1.235, allocations: 0 / 1.333 GB, free: 17.86 MB / 1.061 GB Notification: Performance of matching and sorting (n=21): time 0.001609/1.237, allocations: 0.6036 MB / 1.333 GB, free: 17.54 MB / 1.061 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.597e-05/1.237, allocations: 82.95 kB / 1.334 GB, free: 17.44 MB / 1.061 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002964/1.237, allocations: 211 kB / 1.334 GB, free: 17.3 MB / 1.061 GB Notification: Performance of collectPreVariables (initialization): time 2.478e-05/1.237, allocations: 31.42 kB / 1.334 GB, free: 17.27 MB / 1.061 GB Notification: Performance of collectInitialEqns (initialization): time 9.361e-05/1.237, allocations: 160.3 kB / 1.334 GB, free: 17.12 MB / 1.061 GB Notification: Performance of collectInitialBindings (initialization): time 6.618e-05/1.237, allocations: 75.39 kB / 1.334 GB, free: 17.07 MB / 1.061 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001325/1.237, allocations: 72.66 kB / 1.334 GB, free: 17.02 MB / 1.061 GB Notification: Performance of setup shared object (initialization): time 9.402e-05/1.237, allocations: 329.4 kB / 1.334 GB, free: 16.7 MB / 1.061 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003632/1.238, allocations: 154.1 kB / 1.335 GB, free: 16.64 MB / 1.061 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004346/1.238, allocations: 224.7 kB / 1.335 GB, free: 16.49 MB / 1.061 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0006885/1.239, allocations: 381.8 kB / 1.335 GB, free: 16.27 MB / 1.061 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.025e-06/1.239, allocations: 4.812 kB / 1.335 GB, free: 16.27 MB / 1.061 GB Notification: Performance of matching and sorting (n=33) (initialization): time 0.001137/1.24, allocations: 449.1 kB / 1.336 GB, free: 16.09 MB / 1.061 GB Notification: Performance of prepare postOptimizeDAE: time 2.669e-05/1.24, allocations: 10.59 kB / 1.336 GB, free: 16.08 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.344e-05/1.24, allocations: 3.453 kB / 1.336 GB, free: 16.08 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002892/1.24, allocations: 39.69 kB / 1.336 GB, free: 16.07 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004351/1.241, allocations: 78.19 kB / 1.336 GB, free: 16.06 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001496/1.242, allocations: 1.6 MB / 1.337 GB, free: 14.55 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003854/1.243, allocations: 45.83 kB / 1.337 GB, free: 14.54 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.802e-05/1.243, allocations: 19.41 kB / 1.337 GB, free: 14.53 MB / 1.061 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0004155/1.243, allocations: 245.3 kB / 1.338 GB, free: 14.39 MB / 1.061 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0003579/1.244, allocations: 218.7 kB / 1.338 GB, free: 14.25 MB / 1.061 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0006305/1.244, allocations: 366.5 kB / 1.338 GB, free: 14.03 MB / 1.061 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.513e-06/1.244, allocations: 4 kB / 1.338 GB, free: 14.03 MB / 1.061 GB Notification: Performance of matching and sorting (n=33) (initialization_lambda0): time 0.0009531/1.245, allocations: 421.9 kB / 1.339 GB, free: 13.86 MB / 1.061 GB Notification: Performance of prepare postOptimizeDAE: time 1.349e-05/1.245, allocations: 10.94 kB / 1.339 GB, free: 13.86 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.212e-06/1.245, allocations: 3.406 kB / 1.339 GB, free: 13.86 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0001556/1.245, allocations: 39.66 kB / 1.339 GB, free: 13.84 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003858/1.246, allocations: 77.67 kB / 1.339 GB, free: 13.84 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001225/1.247, allocations: 1.615 MB / 1.34 GB, free: 12.32 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003344/1.247, allocations: 32.31 kB / 1.34 GB, free: 12.31 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.085e-05/1.247, allocations: 19.56 kB / 1.34 GB, free: 12.3 MB / 1.061 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 12 * 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 (31): * Single equations (assignments): 30 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.000157/1.247, allocations: 197.6 kB / 1.34 GB, free: 12.11 MB / 1.061 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 9.075e-05/1.248, allocations: 23.34 kB / 1.34 GB, free: 12.09 MB / 1.061 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0008116/1.248, allocations: 356 kB / 1.341 GB, free: 11.94 MB / 1.061 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.464e-06/1.248, allocations: 4.531 kB / 1.341 GB, free: 11.94 MB / 1.061 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.158e-06/1.248, allocations: 5.469 kB / 1.341 GB, free: 11.93 MB / 1.061 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.139e-06/1.248, allocations: 0 / 1.341 GB, free: 11.93 MB / 1.061 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001613/1.25, allocations: 0.9682 MB / 1.342 GB, free: 11.3 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.368e-06/1.25, allocations: 1.5 kB / 1.342 GB, free: 11.3 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002429/1.25, allocations: 55.58 kB / 1.342 GB, free: 11.29 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0001368/1.25, allocations: 39.55 kB / 1.342 GB, free: 11.28 MB / 1.061 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.511e-05/1.25, allocations: 8.016 kB / 1.342 GB, free: 11.27 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000969/1.251, allocations: 1.508 MB / 1.343 GB, free: 9.816 MB / 1.061 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.068e-06/1.251, allocations: 9.656 kB / 1.343 GB, free: 9.809 MB / 1.061 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006957/1.252, allocations: 0.5352 MB / 1.344 GB, free: 9.441 MB / 1.061 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001052/1.252, allocations: 124.9 kB / 1.344 GB, free: 9.324 MB / 1.061 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.733e-05/1.252, allocations: 8.641 kB / 1.344 GB, free: 9.32 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002704/1.252, allocations: 24.39 kB / 1.344 GB, free: 9.316 MB / 1.061 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.795e-05/1.253, allocations: 27.92 kB / 1.344 GB, free: 9.305 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.722e-05/1.253, allocations: 6.719 kB / 1.344 GB, free: 9.305 MB / 1.061 GB Notification: Performance of sorting global known variables: time 0.0001991/1.253, allocations: 159.1 kB / 1.344 GB, free: 9.207 MB / 1.061 GB Notification: Performance of sort global known variables: time 7e-08/1.253, allocations: 0 / 1.344 GB, free: 9.207 MB / 1.061 GB Notification: Performance of remove unused functions: time 0.0007266/1.253, allocations: 113.8 kB / 1.344 GB, free: 9.191 MB / 1.061 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * 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 (21): * Single equations (assignments): 20 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0001667/1.254, allocations: 111.4 kB / 1.344 GB, free: 9.094 MB / 1.061 GB Notification: Performance of simCode: created initialization part: time 0.001575/1.255, allocations: 0.7316 MB / 1.345 GB, free: 8.711 MB / 1.061 GB Notification: Performance of simCode: created event and clocks part: time 2.706e-06/1.255, allocations: 1.094 kB / 1.345 GB, free: 8.711 MB / 1.061 GB Notification: Performance of simCode: created simulation system equations: time 0.0004099/1.256, allocations: 263.3 kB / 1.345 GB, free: 8.555 MB / 1.061 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.000495/1.256, allocations: 36.39 kB / 1.345 GB, free: 8.543 MB / 1.061 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001061/1.257, allocations: 0.5966 MB / 1.346 GB, free: 8.156 MB / 1.061 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002721/1.257, allocations: 0.7706 MB / 1.347 GB, free: 7.445 MB / 1.061 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001134/1.258, allocations: 28.98 kB / 1.347 GB, free: 7.438 MB / 1.061 GB Notification: Performance of SimCode: time 4e-07/1.258, allocations: 0 / 1.347 GB, free: 7.438 MB / 1.061 GB Notification: Performance of Templates: time 0.009373/1.267, allocations: 4.365 MB / 1.351 GB, free: 7.094 MB / 1.061 GB " [Timeout remaining time 299] make -j1 -f Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.makefile [Timeout 300] (rm -f Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.pipe ; mkfifo Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.pipe ; head -c 1048576 < Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.pipe >> ../files/Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.sim & ./Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid -abortSlowSimulation -alarm=400 -emit_protected -lv LOG_STATS > Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.pipe 2>&1) [Timeout 400] diffSimulationResults("Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Electrical_AC_OnePhase_Examples_GeneratorLoadGrid.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Electrical.AC.OnePhase.Examples.GeneratorLoadGrid.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: 13.368632632991648]