Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001633/0.001633, allocations: 115.2 kB / 17.13 MB, free: 5.914 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001862/0.001862, allocations: 193.2 kB / 20.08 MB, free: 2.98 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.442/1.442, allocations: 225.6 MB / 248.5 MB, free: 3.617 MB / 190.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/package.mo): time 2.56/2.56, allocations: 443.5 MB / 0.7293 GB, free: 14.51 MB / 0.5762 GB " [Timeout remaining time 177] Using package Buildings with version 10.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: translateModel(Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|XSet.y.1.|senHum.X|hum.sta_a.T|hum.sta_b.T|hum.mWat_flow",fileNamePrefix="Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X") translateModel(Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|XSet.y.1.|senHum.X|hum.sta_a.T|hum.sta_b.T|hum.mWat_flow",fileNamePrefix="Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X") [Timeout 300] "Notification: Performance of FrontEnd - loaded program: time 0.001931/0.001931, allocations: 63.89 kB / 1.057 GB, free: 1.98 MB / 0.795 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3525/0.3544, allocations: 160.7 MB / 1.214 GB, free: 0.9531 MB / 0.9512 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X): time 0.9403/1.295, allocations: 180.9 MB / 1.391 GB, free: 1.543 MB / 1.061 GB Notification: Performance of NFInst.instExpressions: time 0.007606/1.302, allocations: 3.759 MB / 1.394 GB, free: 14.52 MB / 1.076 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0009702/1.303, allocations: 32.53 kB / 1.394 GB, free: 14.5 MB / 1.076 GB Notification: Performance of NFTyping.typeComponents: time 0.001419/1.305, allocations: 441.6 kB / 1.395 GB, free: 14.17 MB / 1.076 GB Notification: Performance of NFTyping.typeBindings: time 0.003941/1.309, allocations: 1.302 MB / 1.396 GB, free: 13.19 MB / 1.076 GB Notification: Performance of NFTyping.typeClassSections: time 0.002393/1.311, allocations: 0.7495 MB / 1.397 GB, free: 12.64 MB / 1.076 GB Notification: Performance of NFFlatten.flatten: time 0.002416/1.313, allocations: 1.358 MB / 1.398 GB, free: 11.85 MB / 1.076 GB Notification: Performance of NFFlatten.resolveConnections: time 0.000741/1.314, allocations: 411.7 kB / 1.399 GB, free: 11.58 MB / 1.076 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003003/1.317, allocations: 1.003 MB / 1.4 GB, free: 10.96 MB / 1.076 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0009061/1.318, allocations: 489.5 kB / 1.4 GB, free: 10.68 MB / 1.076 GB Notification: Performance of NFPackage.collectConstants: time 9.048e-05/1.318, allocations: 42.19 kB / 1.4 GB, free: 10.68 MB / 1.076 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002838/1.321, allocations: 1.231 MB / 1.401 GB, free: 9.988 MB / 1.076 GB Notification: Performance of NFScalarize.scalarize: time 0.0002919/1.321, allocations: 206.8 kB / 1.401 GB, free: 9.848 MB / 1.076 GB Notification: Performance of NFVerifyModel.verify: time 0.0004964/1.322, allocations: 331.6 kB / 1.402 GB, free: 9.633 MB / 1.076 GB Notification: Performance of NFConvertDAE.convert: time 0.002376/1.324, allocations: 1.203 MB / 1.403 GB, free: 8.875 MB / 1.076 GB Notification: Performance of FrontEnd - DAE generated: time 4.388e-06/1.324, allocations: 0 / 1.403 GB, free: 8.875 MB / 1.076 GB Notification: Performance of FrontEnd: time 2.144e-06/1.324, allocations: 0 / 1.403 GB, free: 8.875 MB / 1.076 GB Notification: Performance of Transformations before backend: time 1.235e-05/1.324, allocations: 1.375 kB / 1.403 GB, free: 8.875 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: 97 * Number of variables: 97 Notification: Performance of Generate backend data structure: time 0.002413/1.327, allocations: 1.073 MB / 1.404 GB, free: 7.98 MB / 1.076 GB Notification: Performance of prepare preOptimizeDAE: time 3.994e-05/1.327, allocations: 9.062 kB / 1.404 GB, free: 7.98 MB / 1.076 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001366/1.328, allocations: 225 kB / 1.404 GB, free: 7.875 MB / 1.076 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001009/1.329, allocations: 0.5668 MB / 1.405 GB, free: 7.398 MB / 1.076 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.281e-05/1.329, allocations: 33.92 kB / 1.405 GB, free: 7.383 MB / 1.076 GB Notification: Performance of preOpt expandDerOperator (simulation): time 7.413e-05/1.329, allocations: 39.12 kB / 1.405 GB, free: 7.371 MB / 1.076 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001113/1.33, allocations: 0.531 MB / 1.405 GB, free: 7.039 MB / 1.076 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.5e-05/1.33, allocations: 1.25 kB / 1.405 GB, free: 7.039 MB / 1.076 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.937e-05/1.33, allocations: 19.84 kB / 1.405 GB, free: 7.023 MB / 1.076 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.632e-05/1.33, allocations: 15.62 kB / 1.405 GB, free: 7.02 MB / 1.076 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001224/1.332, allocations: 0.5065 MB / 1.406 GB, free: 6.773 MB / 1.076 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.00346/1.335, allocations: 2.218 MB / 1.408 GB, free: 4.832 MB / 1.076 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007722/1.336, allocations: 332.5 kB / 1.408 GB, free: 4.605 MB / 1.076 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002256/1.336, allocations: 139.1 kB / 1.409 GB, free: 4.531 MB / 1.076 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001437/1.337, allocations: 0.8435 MB / 1.409 GB, free: 3.617 MB / 1.076 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0003352/1.338, allocations: 189.1 kB / 1.41 GB, free: 3.48 MB / 1.076 GB Notification: Performance of pre-optimization done (n=26): time 2.114e-06/1.338, allocations: 3.938 kB / 1.41 GB, free: 3.477 MB / 1.076 GB Notification: Performance of matching and sorting (n=26): time 0.001052/1.339, allocations: 438.9 kB / 1.41 GB, free: 3.258 MB / 1.076 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.967e-05/1.339, allocations: 79.83 kB / 1.41 GB, free: 3.164 MB / 1.076 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008851/1.34, allocations: 0.6572 MB / 1.411 GB, free: 2.789 MB / 1.076 GB Notification: Performance of collectPreVariables (initialization): time 3.723e-05/1.34, allocations: 32.14 kB / 1.411 GB, free: 2.754 MB / 1.076 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002837/1.34, allocations: 325 kB / 1.411 GB, free: 2.469 MB / 1.076 GB Notification: Performance of collectInitialBindings (initialization): time 8.338e-05/1.34, allocations: 96.97 kB / 1.411 GB, free: 2.387 MB / 1.076 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001667/1.34, allocations: 79.55 kB / 1.411 GB, free: 2.332 MB / 1.076 GB Notification: Performance of setup shared object (initialization): time 0.0002017/1.341, allocations: 379.4 kB / 1.412 GB, free: 1.969 MB / 1.076 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003584/1.341, allocations: 137.8 kB / 1.412 GB, free: 1.898 MB / 1.076 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004758/1.341, allocations: 277.1 kB / 1.412 GB, free: 1.656 MB / 1.076 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0006724/1.342, allocations: 382.8 kB / 1.412 GB, free: 1.367 MB / 1.076 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.309e-06/1.342, allocations: 2.25 kB / 1.412 GB, free: 1.367 MB / 1.076 GB Notification: Performance of matching and sorting (n=43) (initialization): time 0.00101/1.343, allocations: 484.4 kB / 1.413 GB, free: 1.121 MB / 1.076 GB Notification: Performance of prepare postOptimizeDAE: time 1.666e-05/1.343, allocations: 7.906 kB / 1.413 GB, free: 1.121 MB / 1.076 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.356e-06/1.343, allocations: 2.531 kB / 1.413 GB, free: 1.121 MB / 1.076 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.219e-05/1.343, allocations: 7.984 kB / 1.413 GB, free: 1.121 MB / 1.076 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004051/1.344, allocations: 100.5 kB / 1.413 GB, free: 1.086 MB / 1.076 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.004e-05/1.344, allocations: 4.75 kB / 1.413 GB, free: 1.086 MB / 1.076 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006055/1.344, allocations: 77.41 kB / 1.413 GB, free: 1.043 MB / 1.076 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.012e-05/1.344, allocations: 19.03 kB / 1.413 GB, free: 1.039 MB / 1.076 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0005328/1.345, allocations: 293.1 kB / 1.413 GB, free: 0.8555 MB / 1.076 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0004714/1.345, allocations: 285.4 kB / 1.414 GB, free: 0.6055 MB / 1.076 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0006345/1.346, allocations: 376.9 kB / 1.414 GB, free: 328 kB / 1.076 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.246e-06/1.346, allocations: 2.469 kB / 1.414 GB, free: 328 kB / 1.076 GB Notification: Performance of matching and sorting (n=43) (initialization_lambda0): time 0.0009875/1.347, allocations: 482.3 kB / 1.414 GB, free: 72 kB / 1.076 GB Notification: Performance of prepare postOptimizeDAE: time 1.289e-05/1.347, allocations: 12.73 kB / 1.414 GB, free: 68 kB / 1.076 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.568e-06/1.347, allocations: 6.031 kB / 1.414 GB, free: 68 kB / 1.076 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.464e-06/1.347, allocations: 4.844 kB / 1.414 GB, free: 68 kB / 1.076 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000369/1.347, allocations: 85.98 kB / 1.414 GB, free: 48 kB / 1.076 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 8.937e-06/1.347, allocations: 8.969 kB / 1.414 GB, free: 44 kB / 1.076 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005821/1.348, allocations: 66.16 kB / 1.415 GB, free: 8 kB / 1.076 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.3e-05/1.348, allocations: 19.31 kB / 1.415 GB, free: 4 kB / 1.076 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 18 * Number of states: 0 () * Number of discrete variables: 5 ($PRE.XSet.nextTimeEvent,$whenCondition1,XSet.nextTimeEventScaled,$PRE.XSet.nextTimeEventScaled,XSet.nextTimeEvent) * 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 0.0002195/1.348, allocations: 206.6 kB / 1.415 GB, free: 15.8 MB / 1.092 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001029/1.348, allocations: 67.03 kB / 1.415 GB, free: 15.77 MB / 1.092 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006256/1.349, allocations: 320.4 kB / 1.415 GB, free: 15.57 MB / 1.092 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.489e-06/1.349, allocations: 2.188 kB / 1.415 GB, free: 15.57 MB / 1.092 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.811e-06/1.349, allocations: 2.25 kB / 1.415 GB, free: 15.57 MB / 1.092 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.226e-06/1.349, allocations: 11.92 kB / 1.415 GB, free: 15.56 MB / 1.092 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001552/1.35, allocations: 1.084 MB / 1.416 GB, free: 14.7 MB / 1.092 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.729e-06/1.35, allocations: 1.906 kB / 1.416 GB, free: 14.7 MB / 1.092 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001701/1.351, allocations: 42.95 kB / 1.416 GB, free: 14.69 MB / 1.092 GB Notification: Performance of postOpt tearingSystem (simulation): time 4.859e-06/1.351, allocations: 6.438 kB / 1.416 GB, free: 14.68 MB / 1.092 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.213e-05/1.351, allocations: 6.344 kB / 1.416 GB, free: 14.68 MB / 1.092 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.125e-06/1.351, allocations: 12.83 kB / 1.416 GB, free: 14.68 MB / 1.092 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.925e-06/1.351, allocations: 2.625 kB / 1.416 GB, free: 14.68 MB / 1.092 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006135/1.351, allocations: 480.3 kB / 1.417 GB, free: 14.31 MB / 1.092 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002072/1.351, allocations: 164.5 kB / 1.417 GB, free: 14.16 MB / 1.092 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.492e-05/1.352, allocations: 8.734 kB / 1.417 GB, free: 14.15 MB / 1.092 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003204/1.352, allocations: 18.17 kB / 1.417 GB, free: 14.14 MB / 1.092 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.93e-05/1.352, allocations: 29.72 kB / 1.417 GB, free: 14.12 MB / 1.092 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.083e-05/1.352, allocations: 8.031 kB / 1.417 GB, free: 14.12 MB / 1.092 GB Notification: Performance of sorting global known variables: time 0.0006893/1.353, allocations: 479.1 kB / 1.417 GB, free: 13.87 MB / 1.092 GB Notification: Performance of sort global known variables: time 9e-08/1.353, allocations: 0 / 1.417 GB, free: 13.87 MB / 1.092 GB Notification: Performance of remove unused functions: time 0.000922/1.354, allocations: 268.9 kB / 1.418 GB, free: 13.81 MB / 1.092 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,XSet.nextTimeEvent,XSet.nextTimeEventScaled) * Number of discrete states: 2 (XSet.nextTimeEvent,XSet.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (25): * Single equations (assignments): 23 * 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 0.001797/1.355, allocations: 0.5188 MB / 1.418 GB, free: 13.57 MB / 1.092 GB Notification: Performance of simCode: created initialization part: time 0.001233/1.357, allocations: 489.6 kB / 1.419 GB, free: 13.36 MB / 1.092 GB Notification: Performance of simCode: created event and clocks part: time 3.126e-06/1.357, allocations: 0 / 1.419 GB, free: 13.36 MB / 1.092 GB Notification: Performance of simCode: created simulation system equations: time 0.0002125/1.357, allocations: 116 kB / 1.419 GB, free: 13.31 MB / 1.092 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001349/1.358, allocations: 285.3 kB / 1.419 GB, free: 13.16 MB / 1.092 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00198/1.36, allocations: 1.08 MB / 1.42 GB, free: 12.43 MB / 1.092 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005545/1.361, allocations: 0.8857 MB / 1.421 GB, free: 11.64 MB / 1.092 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001635/1.361, allocations: 51.2 kB / 1.421 GB, free: 11.62 MB / 1.092 GB Notification: Performance of SimCode: time 5.51e-07/1.361, allocations: 0 / 1.421 GB, free: 11.62 MB / 1.092 GB Notification: Performance of Templates: time 0.01691/1.378, allocations: 9.884 MB / 1.431 GB, free: 2.742 MB / 1.092 GB " [Timeout remaining time 299] make -j1 -f Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.makefile [Timeout 300] (rm -f Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe ; mkfifo Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe ; head -c 1048576 < Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe >> ../files/Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.sim & ./Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X -abortSlowSimulation -alarm=400 -emit_protected -lv LOG_STATS > Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe 2>&1) [Timeout 400] diffSimulationResults("Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_10.0.x/Buildings_Fluid_Humidifiers_Validation_SprayAirWasher_X.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork_2/OpenModelicaLibraryTesting/files/Buildings_10_Buildings.Fluid.Humidifiers.Validation.SprayAirWasher_X.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: 13.483258317923173]