Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.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 0.001916/0.001916, allocations: 100.3 kB / 19.7 MB, free: 2.012 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 0.002666/0.002666, allocations: 221.8 kB / 23 MB, free: 4.914 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 1.474/1.474, allocations: 230.6 MB / 256.8 MB, free: 7.816 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 3.246/3.246, allocations: 0.4892 GB / 0.7951 GB, free: 35.55 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.Fluid.FixedResistances.Examples.CheckValve,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|checkValve.dp|checkValve_m_flow.dp|checkValve.m_flow|checkValveDpFix.m_flow|checkValve_m_flow.m_flow",fileNamePrefix="Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve") translateModel(Buildings.Fluid.FixedResistances.Examples.CheckValve,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|checkValve.dp|checkValve_m_flow.dp|checkValve.m_flow|checkValveDpFix.m_flow|checkValve_m_flow.m_flow",fileNamePrefix="Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve") [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 0.002124/0.002124, allocations: 69.44 kB / 1.154 GB, free: 25.55 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.373/0.3751, allocations: 176.1 MB / 1.326 GB, free: 1.867 MB / 1.014 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.FixedResistances.Examples.CheckValve): time 0.02661/0.4018, allocations: 19.41 MB / 1.345 GB, free: 14.38 MB / 1.045 GB Notification: Performance of NFInst.instExpressions: time 0.008639/0.4104, allocations: 4.82 MB / 1.35 GB, free: 9.551 MB / 1.045 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008382/0.4112, allocations: 27.75 kB / 1.35 GB, free: 9.523 MB / 1.045 GB Notification: Performance of NFTyping.typeComponents: time 0.0009232/0.4122, allocations: 270 kB / 1.35 GB, free: 9.258 MB / 1.045 GB Notification: Performance of NFTyping.typeBindings: time 0.003162/0.4153, allocations: 1.061 MB / 1.351 GB, free: 8.195 MB / 1.045 GB Notification: Performance of NFTyping.typeClassSections: time 0.001787/0.4171, allocations: 0.6349 MB / 1.352 GB, free: 7.566 MB / 1.045 GB Notification: Performance of NFFlatten.flatten: time 0.00232/0.4194, allocations: 1.481 MB / 1.353 GB, free: 6.078 MB / 1.045 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0006998/0.4201, allocations: 392.9 kB / 1.354 GB, free: 5.691 MB / 1.045 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001519/0.4216, allocations: 0.7277 MB / 1.354 GB, free: 4.961 MB / 1.045 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0008111/0.4225, allocations: 497.8 kB / 1.355 GB, free: 4.473 MB / 1.045 GB Notification: Performance of NFPackage.collectConstants: time 0.0001068/0.4226, allocations: 52 kB / 1.355 GB, free: 4.422 MB / 1.045 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001448/0.424, allocations: 0.5692 MB / 1.355 GB, free: 3.852 MB / 1.045 GB Notification: Performance of NFScalarize.scalarize: time 0.0001991/0.4242, allocations: 159.3 kB / 1.356 GB, free: 3.695 MB / 1.045 GB Notification: Performance of NFVerifyModel.verify: time 0.0003477/0.4246, allocations: 266.7 kB / 1.356 GB, free: 3.434 MB / 1.045 GB Notification: Performance of NFConvertDAE.convert: time 0.001575/0.4261, allocations: 0.9691 MB / 1.357 GB, free: 2.461 MB / 1.045 GB Notification: Performance of FrontEnd - DAE generated: time 6.332e-06/0.4261, allocations: 0 / 1.357 GB, free: 2.461 MB / 1.045 GB Notification: Performance of FrontEnd: time 2.314e-06/0.4261, allocations: 0 / 1.357 GB, free: 2.461 MB / 1.045 GB Notification: Performance of Transformations before backend: time 1.099e-05/0.4262, allocations: 8 kB / 1.357 GB, free: 2.453 MB / 1.045 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 62 * Number of variables: 62 Notification: Performance of Generate backend data structure: time 0.002089/0.4282, allocations: 0.9747 MB / 1.358 GB, free: 1.445 MB / 1.045 GB Notification: Performance of prepare preOptimizeDAE: time 4.959e-05/0.4283, allocations: 8.031 kB / 1.358 GB, free: 1.438 MB / 1.045 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001784/0.4285, allocations: 76.47 kB / 1.358 GB, free: 1.363 MB / 1.045 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001176/0.4296, allocations: 0.5081 MB / 1.358 GB, free: 0.8242 MB / 1.045 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.21e-05/0.4297, allocations: 20.5 kB / 1.358 GB, free: 0.8047 MB / 1.045 GB Notification: Performance of preOpt expandDerOperator (simulation): time 5.919e-05/0.4297, allocations: 36 kB / 1.358 GB, free: 0.7695 MB / 1.045 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007187/0.4305, allocations: 333.6 kB / 1.359 GB, free: 444 kB / 1.045 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.37e-05/0.4305, allocations: 0 / 1.359 GB, free: 444 kB / 1.045 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.148e-05/0.4305, allocations: 8 kB / 1.359 GB, free: 436 kB / 1.045 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.778e-06/0.4305, allocations: 8 kB / 1.359 GB, free: 428 kB / 1.045 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006973/0.4312, allocations: 257.8 kB / 1.359 GB, free: 172 kB / 1.045 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002225/0.4334, allocations: 0.9483 MB / 1.36 GB, free: 15.19 MB / 1.061 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006299/0.4341, allocations: 234.5 kB / 1.36 GB, free: 14.95 MB / 1.061 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003434/0.4344, allocations: 132.7 kB / 1.36 GB, free: 14.82 MB / 1.061 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001969/0.4346, allocations: 43.97 kB / 1.36 GB, free: 14.77 MB / 1.061 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.789e-05/0.4346, allocations: 34.56 kB / 1.36 GB, free: 14.73 MB / 1.061 GB Notification: Performance of pre-optimization done (n=18): time 1.392e-06/0.4346, allocations: 0 / 1.36 GB, free: 14.73 MB / 1.061 GB Notification: Performance of matching and sorting (n=18): time 0.001167/0.4358, allocations: 406.9 kB / 1.361 GB, free: 14.33 MB / 1.061 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.872e-05/0.4359, allocations: 51.41 kB / 1.361 GB, free: 14.27 MB / 1.061 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009361/0.4368, allocations: 0.5925 MB / 1.361 GB, free: 13.66 MB / 1.061 GB Notification: Performance of collectPreVariables (initialization): time 3.865e-05/0.4368, allocations: 33.64 kB / 1.361 GB, free: 13.62 MB / 1.061 GB Notification: Performance of collectInitialEqns (initialization): time 0.000232/0.4371, allocations: 269 kB / 1.362 GB, free: 13.36 MB / 1.061 GB Notification: Performance of collectInitialBindings (initialization): time 7.125e-05/0.4371, allocations: 71.42 kB / 1.362 GB, free: 13.29 MB / 1.061 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000221/0.4374, allocations: 122 kB / 1.362 GB, free: 13.16 MB / 1.061 GB Notification: Performance of setup shared object (initialization): time 0.0001968/0.4376, allocations: 366.8 kB / 1.362 GB, free: 12.79 MB / 1.061 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005632/0.4381, allocations: 202.3 kB / 1.362 GB, free: 12.59 MB / 1.061 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009399/0.4391, allocations: 0.5322 MB / 1.363 GB, free: 11.97 MB / 1.061 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0009975/0.4401, allocations: 361 kB / 1.363 GB, free: 11.61 MB / 1.061 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.807e-06/0.4401, allocations: 0 / 1.363 GB, free: 11.61 MB / 1.061 GB Notification: Performance of matching and sorting (n=51) (initialization): time 0.001599/0.4417, allocations: 0.5837 MB / 1.364 GB, free: 11.02 MB / 1.061 GB Notification: Performance of prepare postOptimizeDAE: time 1.789e-05/0.4417, allocations: 7.984 kB / 1.364 GB, free: 11.01 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.731e-06/0.4417, allocations: 0 / 1.364 GB, free: 11.01 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002419/0.4419, allocations: 56.86 kB / 1.364 GB, free: 10.95 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005532/0.4425, allocations: 107.9 kB / 1.364 GB, free: 10.84 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005675/0.443, allocations: 0.5678 MB / 1.365 GB, free: 10.25 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00074/0.4438, allocations: 83.91 kB / 1.365 GB, free: 10.17 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.984e-05/0.4438, allocations: 23.98 kB / 1.365 GB, free: 10.14 MB / 1.061 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007266/0.4446, allocations: 320.8 kB / 1.365 GB, free: 9.824 MB / 1.061 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008102/0.4454, allocations: 0.5283 MB / 1.365 GB, free: 9.211 MB / 1.061 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009023/0.4463, allocations: 352.7 kB / 1.366 GB, free: 8.859 MB / 1.061 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.663e-06/0.4463, allocations: 0 / 1.366 GB, free: 8.859 MB / 1.061 GB Notification: Performance of matching and sorting (n=51) (initialization_lambda0): time 0.001427/0.4477, allocations: 0.5533 MB / 1.366 GB, free: 8.301 MB / 1.061 GB Notification: Performance of prepare postOptimizeDAE: time 1.275e-05/0.4477, allocations: 7.938 kB / 1.366 GB, free: 8.293 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.729e-06/0.4477, allocations: 3.984 kB / 1.366 GB, free: 8.289 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.53e-06/0.4477, allocations: 4 kB / 1.366 GB, free: 8.285 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005577/0.4483, allocations: 123.8 kB / 1.366 GB, free: 8.164 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.566e-06/0.4483, allocations: 0 / 1.366 GB, free: 8.164 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007574/0.4491, allocations: 87.78 kB / 1.367 GB, free: 8.078 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.646e-05/0.4491, allocations: 19.98 kB / 1.367 GB, free: 8.059 MB / 1.061 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 3 * 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 (50): * Single equations (assignments): 49 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,1)} Notification: Performance of prepare postOptimizeDAE: time 0.0002065/0.4493, allocations: 199 kB / 1.367 GB, free: 7.859 MB / 1.061 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001113/0.4494, allocations: 55.61 kB / 1.367 GB, free: 7.805 MB / 1.061 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0009767/0.4504, allocations: 390.1 kB / 1.367 GB, free: 7.414 MB / 1.061 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.086e-05/0.4504, allocations: 4 kB / 1.367 GB, free: 7.41 MB / 1.061 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.02e-06/0.4504, allocations: 3.938 kB / 1.367 GB, free: 7.406 MB / 1.061 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.462e-06/0.4504, allocations: 3.984 kB / 1.367 GB, free: 7.402 MB / 1.061 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001773/0.4522, allocations: 0.8622 MB / 1.368 GB, free: 6.492 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.423e-06/0.4522, allocations: 4 kB / 1.368 GB, free: 6.488 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003943/0.4526, allocations: 91.97 kB / 1.368 GB, free: 6.398 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (simulation): time 4.028e-06/0.4526, allocations: 0 / 1.368 GB, free: 6.398 MB / 1.061 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.309e-05/0.4526, allocations: 11.98 kB / 1.368 GB, free: 6.387 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0006035/0.4532, allocations: 0.6328 MB / 1.369 GB, free: 5.73 MB / 1.061 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.178e-06/0.4532, allocations: 3.938 kB / 1.369 GB, free: 5.727 MB / 1.061 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0009101/0.4541, allocations: 481 kB / 1.369 GB, free: 5.23 MB / 1.061 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002039/0.4543, allocations: 79.66 kB / 1.369 GB, free: 5.152 MB / 1.061 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.307e-05/0.4544, allocations: 7.984 kB / 1.369 GB, free: 5.145 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004307/0.4548, allocations: 35.95 kB / 1.369 GB, free: 5.109 MB / 1.061 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.618e-05/0.4549, allocations: 23.91 kB / 1.369 GB, free: 5.086 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.598e-05/0.4549, allocations: 15.98 kB / 1.369 GB, free: 5.07 MB / 1.061 GB Notification: Performance of sorting global known variables: time 0.0007028/0.4556, allocations: 418.7 kB / 1.37 GB, free: 4.664 MB / 1.061 GB Notification: Performance of sort global known variables: time 9e-08/0.4556, allocations: 0 / 1.37 GB, free: 4.664 MB / 1.061 GB Notification: Performance of remove unused functions: time 0.001025/0.4567, allocations: 343.2 kB / 1.37 GB, free: 4.328 MB / 1.061 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * 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): 17 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0005122/0.4572, allocations: 266.8 kB / 1.37 GB, free: 4.059 MB / 1.061 GB Notification: Performance of simCode: created initialization part: time 0.001884/0.4591, allocations: 0.6291 MB / 1.371 GB, free: 3.43 MB / 1.061 GB Notification: Performance of simCode: created event and clocks part: time 3.697e-06/0.4591, allocations: 0 / 1.371 GB, free: 3.43 MB / 1.061 GB Notification: Performance of simCode: created simulation system equations: time 0.001501/0.4606, allocations: 266 kB / 1.371 GB, free: 3.172 MB / 1.061 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001107/0.4617, allocations: 188 kB / 1.371 GB, free: 2.988 MB / 1.061 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001637/0.4633, allocations: 0.8854 MB / 1.372 GB, free: 2.055 MB / 1.061 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002993/0.4636, allocations: 267 kB / 1.373 GB, free: 1.762 MB / 1.061 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001513/0.4638, allocations: 51.41 kB / 1.373 GB, free: 1.711 MB / 1.061 GB Notification: Performance of SimCode: time 1.122e-06/0.4638, allocations: 4 kB / 1.373 GB, free: 1.707 MB / 1.061 GB Notification: Performance of Templates: time 0.01961/0.4834, allocations: 11.66 MB / 1.384 GB, free: 6.141 MB / 1.076 GB " [Timeout remaining time 300] make -j1 -f Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.makefile [Timeout 300] (rm -f Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.pipe ; mkfifo Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.pipe ; head -c 1048576 < Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.pipe >> ../files/Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.sim & ./Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve -abortSlowSimulation -alarm=400 -emit_protected -lv LOG_STATS > Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.pipe 2>&1) [Timeout 400] diffSimulationResults("Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Fluid_FixedResistances_Examples_CheckValve.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Fluid.FixedResistances.Examples.CheckValve.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: 13.800115315709263]