Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.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 0.001471/0.001471, allocations: 83.89 kB / 21.19 MB, free: 3.387 MB / 18.57 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 0.001545/0.001545, allocations: 141.1 kB / 24.54 MB, free: 36 kB / 18.57 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 0.9195/0.9195, allocations: 173.3 MB / 201.1 MB, free: 8.965 MB / 186.7 MB " [Timeout remaining time 179] 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(Modelica.Fluid.Examples.TraceSubstances.RoomCO2,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5002,variableFilter="time|volume.medium.T|volume.medium.Xi.[0-9,]+.|volume.medium.p",fileNamePrefix="Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2") translateModel(Modelica.Fluid.Examples.TraceSubstances.RoomCO2,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5002,variableFilter="time|volume.medium.T|volume.medium.Xi.[0-9,]+.|volume.medium.p",fileNamePrefix="Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.944e-06/1.944e-06, allocations: 0 / 268 MB, free: 6.305 MB / 250.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.588e-05/2.782e-05, allocations: 5.969 kB / 268 MB, free: 6.301 MB / 250.7 MB Notification: Performance of NFInst.instantiate(Modelica.Fluid.Examples.TraceSubstances.RoomCO2): time 0.2583/0.2583, allocations: 148.4 MB / 416.4 MB, free: 5.016 MB / 362.7 MB Notification: Performance of NFInst.instExpressions: time 0.006259/0.2646, allocations: 5.741 MB / 422.1 MB, free: 15.29 MB / 378.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004296/0.265, allocations: 35.69 kB / 422.2 MB, free: 15.25 MB / 378.7 MB Notification: Performance of NFTyping.typeComponents: time 0.0005665/0.2656, allocations: 238.4 kB / 422.4 MB, free: 15.02 MB / 378.7 MB Notification: Performance of NFTyping.typeBindings: time 0.003454/0.269, allocations: 2.044 MB / 424.4 MB, free: 12.96 MB / 378.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.003093/0.2721, allocations: 2.001 MB / 426.4 MB, free: 10.96 MB / 378.7 MB Notification: Performance of NFFlatten.flatten: time 0.002107/0.2742, allocations: 2.609 MB / 429 MB, free: 8.34 MB / 378.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.000864/0.2751, allocations: 0.6966 MB / 429.7 MB, free: 7.629 MB / 378.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.001743/0.2769, allocations: 1.598 MB / 431.3 MB, free: 6.027 MB / 378.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0009092/0.2778, allocations: 1.005 MB / 432.3 MB, free: 5.02 MB / 378.7 MB Notification: Performance of NFPackage.collectConstants: time 0.0001458/0.2779, allocations: 116 kB / 432.5 MB, free: 4.906 MB / 378.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.003329/0.2812, allocations: 2.202 MB / 434.7 MB, free: 2.703 MB / 378.7 MB Notification: Performance of NFScalarize.scalarize: time 0.0004014/0.2816, allocations: 0.5884 MB / 435.3 MB, free: 2.113 MB / 378.7 MB Notification: Performance of NFVerifyModel.verify: time 0.0004092/0.2821, allocations: 483.1 kB / 435.7 MB, free: 1.641 MB / 378.7 MB Notification: Performance of NFConvertDAE.convert: time 0.1599/0.442, allocations: 2.722 MB / 438.4 MB, free: 9.754 MB / 378.7 MB Notification: Performance of FrontEnd - DAE generated: time 6.051e-06/0.442, allocations: 0.8125 kB / 438.4 MB, free: 9.754 MB / 378.7 MB Notification: Performance of FrontEnd: time 2.255e-06/0.442, allocations: 0.5 kB / 438.4 MB, free: 9.754 MB / 378.7 MB Notification: Performance of Transformations before backend: time 5.733e-05/0.4421, allocations: 0 / 438.4 MB, free: 9.754 MB / 378.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 228 * Number of variables: 228 Notification: Performance of Generate backend data structure: time 0.004485/0.4465, allocations: 1.829 MB / 440.3 MB, free: 8.797 MB / 378.7 MB Notification: Performance of prepare preOptimizeDAE: time 4.359e-05/0.4466, allocations: 12.84 kB / 440.3 MB, free: 8.797 MB / 378.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0005967/0.4472, allocations: 214.5 kB / 440.5 MB, free: 8.727 MB / 378.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001091/0.4483, allocations: 0.6503 MB / 441.1 MB, free: 8.504 MB / 378.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001317/0.4484, allocations: 182.9 kB / 441.3 MB, free: 8.379 MB / 378.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001637/0.4486, allocations: 97.94 kB / 441.4 MB, free: 8.379 MB / 378.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001635/0.4502, allocations: 1.434 MB / 442.9 MB, free: 7.527 MB / 378.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 3.316e-05/0.4502, allocations: 5.422 kB / 442.9 MB, free: 7.527 MB / 378.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.827e-05/0.4503, allocations: 40.62 kB / 442.9 MB, free: 7.527 MB / 378.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.87e-05/0.4504, allocations: 75 kB / 443 MB, free: 7.523 MB / 378.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001288/0.4517, allocations: 0.671 MB / 443.6 MB, free: 7.512 MB / 378.7 MB 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 0.004707/0.4564, allocations: 4.606 MB / 448.3 MB, free: 5.031 MB / 378.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001115/0.4575, allocations: 0.5476 MB / 448.8 MB, free: 4.988 MB / 378.7 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003516/0.4579, allocations: 228.7 kB / 449 MB, free: 4.969 MB / 378.7 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0003239/0.4582, allocations: 141 kB / 449.2 MB, free: 4.961 MB / 378.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.807e-05/0.4582, allocations: 47.02 kB / 449.2 MB, free: 4.918 MB / 378.7 MB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0002789/0.4585, allocations: 92.75 kB / 449.3 MB, free: 4.871 MB / 378.7 MB Notification: Performance of pre-optimization done (n=84): time 3.627e-06/0.4585, allocations: 1.531 kB / 449.3 MB, free: 4.871 MB / 378.7 MB Notification: Performance of matching and sorting (n=96): time 0.006004/0.4645, allocations: 2.774 MB / 452.1 MB, free: 4.445 MB / 378.7 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.589e-05/0.4646, allocations: 114.5 kB / 452.2 MB, free: 4.316 MB / 378.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006712/0.4652, allocations: 0.6243 MB / 452.8 MB, free: 20.09 MB / 394.7 MB Notification: Performance of collectPreVariables (initialization): time 7.78e-05/0.4653, allocations: 43.92 kB / 452.9 MB, free: 20.06 MB / 394.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.0002171/0.4655, allocations: 0.5166 MB / 453.4 MB, free: 19.74 MB / 394.7 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001792/0.4657, allocations: 351.3 kB / 453.7 MB, free: 19.52 MB / 394.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002848/0.466, allocations: 262.3 kB / 454 MB, free: 19.48 MB / 394.7 MB Notification: Performance of setup shared object (initialization): time 0.0001819/0.4662, allocations: 0.5765 MB / 454.5 MB, free: 18.98 MB / 394.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004634/0.4666, allocations: 300.8 kB / 454.8 MB, free: 18.91 MB / 394.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005692/0.4672, allocations: 0.8245 MB / 455.7 MB, free: 18.2 MB / 394.7 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001036/0.4682, allocations: 1.058 MB / 456.7 MB, free: 17.59 MB / 394.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.354e-06/0.4683, allocations: 2.594 kB / 456.7 MB, free: 17.59 MB / 394.7 MB Notification: Performance of matching and sorting (n=155) (initialization): time 0.001638/0.4699, allocations: 1.209 MB / 457.9 MB, free: 17.35 MB / 394.7 MB Notification: Performance of prepare postOptimizeDAE: time 4.623e-05/0.4699, allocations: 67.48 kB / 458 MB, free: 17.29 MB / 394.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.771e-05/0.47, allocations: 13.2 kB / 458 MB, free: 17.29 MB / 394.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005202/0.4705, allocations: 170.5 kB / 458.2 MB, free: 17.27 MB / 394.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005823/0.4711, allocations: 264.6 kB / 458.4 MB, free: 17.27 MB / 394.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005699/0.4716, allocations: 0.9135 MB / 459.3 MB, free: 16.46 MB / 394.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005143/0.4721, allocations: 49.45 kB / 459.4 MB, free: 16.46 MB / 394.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.56e-05/0.4722, allocations: 73.77 kB / 459.5 MB, free: 16.46 MB / 394.7 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.000584/0.4728, allocations: 437.9 kB / 459.9 MB, free: 16.27 MB / 394.7 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000528/0.4733, allocations: 0.8237 MB / 460.7 MB, free: 15.57 MB / 394.7 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009529/0.4743, allocations: 1.049 MB / 461.8 MB, free: 14.95 MB / 394.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 6.652e-06/0.4743, allocations: 4.281 kB / 461.8 MB, free: 14.95 MB / 394.7 MB Notification: Performance of matching and sorting (n=155) (initialization_lambda0): time 0.001456/0.4758, allocations: 1.196 MB / 463 MB, free: 14.71 MB / 394.7 MB Notification: Performance of prepare postOptimizeDAE: time 3.518e-05/0.4758, allocations: 68.44 kB / 463 MB, free: 14.65 MB / 394.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.061e-05/0.4758, allocations: 9.656 kB / 463 MB, free: 14.65 MB / 394.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004648/0.4763, allocations: 176.2 kB / 463.2 MB, free: 14.64 MB / 394.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005568/0.4768, allocations: 269.3 kB / 463.5 MB, free: 14.64 MB / 394.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005244/0.4774, allocations: 0.9016 MB / 464.4 MB, free: 13.84 MB / 394.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005019/0.4779, allocations: 51.3 kB / 464.4 MB, free: 13.84 MB / 394.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.999e-05/0.4779, allocations: 69.28 kB / 464.5 MB, free: 13.84 MB / 394.7 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 46 * Number of states: 0 () * Number of discrete variables: 6 (traceVolume.ind,traceSource.ind,volume.regularFlow[1],volume.regularFlow[2],volume.inFlow[2],volume.inFlow[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (148): * Single equations (assignments): 145 * Array equations: 0 * Algorithm blocks: 2 * 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 {(2,6)} Notification: Performance of prepare postOptimizeDAE: time 0.0003547/0.4783, allocations: 358.4 kB / 464.8 MB, free: 13.56 MB / 394.7 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001572/0.4785, allocations: 118 kB / 465 MB, free: 13.52 MB / 394.7 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001568/0.48, allocations: 1.256 MB / 466.2 MB, free: 13.34 MB / 394.7 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.117e-05/0.48, allocations: 11.06 kB / 466.2 MB, free: 13.34 MB / 394.7 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.671e-06/0.48, allocations: 0 / 466.2 MB, free: 13.34 MB / 394.7 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.576e-06/0.4801, allocations: 8.203 kB / 466.2 MB, free: 13.34 MB / 394.7 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00237/0.4824, allocations: 1.839 MB / 468.1 MB, free: 12.91 MB / 394.7 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.46e-06/0.4824, allocations: 3.812 kB / 468.1 MB, free: 12.91 MB / 394.7 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004335/0.4829, allocations: 176.6 kB / 468.3 MB, free: 12.91 MB / 394.7 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0006512/0.4835, allocations: 248.9 kB / 468.5 MB, free: 12.89 MB / 394.7 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.736e-05/0.4836, allocations: 42.23 kB / 468.5 MB, free: 12.89 MB / 394.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000499/0.4841, allocations: 0.8807 MB / 469.4 MB, free: 12.1 MB / 394.7 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.395e-06/0.4841, allocations: 0 / 469.4 MB, free: 12.1 MB / 394.7 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002132/0.4862, allocations: 1.445 MB / 470.9 MB, free: 11.72 MB / 394.7 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0003106/0.4865, allocations: 214.3 kB / 471.1 MB, free: 11.68 MB / 394.7 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001038/0.4866, allocations: 27.89 kB / 471.1 MB, free: 11.68 MB / 394.7 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003777/0.487, allocations: 48.14 kB / 471.1 MB, free: 11.68 MB / 394.7 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001165/0.4871, allocations: 75.66 kB / 471.2 MB, free: 11.67 MB / 394.7 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.47e-05/0.4872, allocations: 51.58 kB / 471.3 MB, free: 11.67 MB / 394.7 MB Notification: Performance of sorting global known variables: time 0.0003078/0.4875, allocations: 391.2 kB / 471.7 MB, free: 11.54 MB / 394.7 MB Notification: Performance of sort global known variables: time 7e-08/0.4875, allocations: 0 / 471.7 MB, free: 11.54 MB / 394.7 MB Notification: Performance of remove unused functions: time 0.002221/0.4897, allocations: 0.9279 MB / 472.6 MB, free: 11.42 MB / 394.7 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 4 (volume.medium.p,volume.medium.Xi[1],volume.medium.T,volume.mC_scaled[1]) * 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 (97): * Single equations (assignments): 94 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * 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 {(2,6)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001545/0.4913, allocations: 0.821 MB / 473.4 MB, free: 11.21 MB / 394.7 MB Notification: Performance of simCode: created initialization part: time 0.002147/0.4934, allocations: 1.661 MB / 475.1 MB, free: 10.77 MB / 394.7 MB Notification: Performance of simCode: created event and clocks part: time 4.359e-06/0.4934, allocations: 4.656 kB / 475.1 MB, free: 10.77 MB / 394.7 MB Notification: Performance of simCode: created simulation system equations: time 0.0005222/0.494, allocations: 405 kB / 475.5 MB, free: 10.75 MB / 394.7 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001215/0.4952, allocations: 499.3 kB / 476 MB, free: 10.69 MB / 394.7 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003327/0.4985, allocations: 2.008 MB / 478 MB, free: 9.887 MB / 394.7 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001727/0.4987, allocations: 264.3 kB / 478.2 MB, free: 9.805 MB / 394.7 MB Notification: Performance of simCode: alias equations: time 0.001044/0.4997, allocations: 0.5896 MB / 478.8 MB, free: 9.746 MB / 394.7 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002351/0.4999, allocations: 98.75 kB / 478.9 MB, free: 9.738 MB / 394.7 MB Notification: Performance of SimCode: time 1.633e-06/0.4999, allocations: 1.062 kB / 478.9 MB, free: 9.738 MB / 394.7 MB Notification: Performance of Templates: time 0.03618/0.5361, allocations: 35.05 MB / 0.5019 GB, free: 5.668 MB / 410.7 MB " [Timeout remaining time 659] make -j1 -f Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.makefile [Timeout 660] (rm -f Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.pipe ; mkfifo Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.pipe ; head -c 1048576 < Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.pipe >> ../files/Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.sim & ./Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2 -abortSlowSimulation -alarm=240 -emit_protected -lv LOG_STATS > Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2.pipe 2>&1) [Timeout 240] diffSimulationResults("Modelica_4.0.0_Modelica.Fluid.Examples.TraceSubstances.RoomCO2_res.mat","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v4.0.0/Modelica/Fluid/Examples/TraceSubstances/RoomCO2/RoomCO2.csv","",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 660] "" [Timeout remaining time 660] Reference file matches [Calling sys.exit(0), Time elapsed: 4.122797128744423]