Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.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 0.001837/0.001837, allocations: 84.3 kB / 20.68 MB, free: 1.035 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 0.001851/0.001851, allocations: 168.8 kB / 23.95 MB, free: 4.172 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 1.48/1.48, allocations: 177.1 MB / 204.3 MB, free: 9.188 MB / 190.1 MB " [Timeout remaining time 178] 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(Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5011,variableFilter="time|sample1.y|sample2.y|hold1.y",fileNamePrefix="Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2") translateModel(Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5011,variableFilter="time|sample1.y|sample2.y|hold1.y",fileNamePrefix="Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.403e-06/1.403e-06, allocations: 0 / 325.1 MB, free: 0.5664 MB / 286.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.135e-05/2.275e-05, allocations: 6.938 kB / 325.1 MB, free: 0.5625 MB / 286.1 MB Notification: Performance of NFInst.instantiate(Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2): time 0.002814/0.002837, allocations: 1.629 MB / 326.7 MB, free: 15.46 MB / 302.1 MB Notification: Performance of NFInst.instExpressions: time 0.0005563/0.003393, allocations: 181.4 kB / 326.9 MB, free: 15.35 MB / 302.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 8.721e-05/0.00348, allocations: 2.656 kB / 326.9 MB, free: 15.35 MB / 302.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0001111/0.003591, allocations: 15.97 kB / 326.9 MB, free: 15.34 MB / 302.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0001476/0.003739, allocations: 16.62 kB / 326.9 MB, free: 15.32 MB / 302.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0002665/0.004005, allocations: 48.22 kB / 326.9 MB, free: 15.3 MB / 302.1 MB Notification: Performance of NFFlatten.flatten: time 0.0001567/0.004162, allocations: 67.3 kB / 327 MB, free: 15.27 MB / 302.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0001469/0.004309, allocations: 29.33 kB / 327 MB, free: 15.25 MB / 302.1 MB Notification: Performance of NFEvalConstants.evaluate: time 7.041e-05/0.004379, allocations: 38.05 kB / 327.1 MB, free: 15.24 MB / 302.1 MB Notification: Performance of NFSimplifyModel.simplify: time 9.497e-05/0.004474, allocations: 34.09 kB / 327.1 MB, free: 15.22 MB / 302.1 MB Notification: Performance of NFPackage.collectConstants: time 3.844e-05/0.004513, allocations: 5.781 kB / 327.1 MB, free: 15.22 MB / 302.1 MB Notification: Performance of NFFlatten.collectFunctions: time 1.771e-05/0.004531, allocations: 5.938 kB / 327.1 MB, free: 15.22 MB / 302.1 MB Notification: Performance of NFScalarize.scalarize: time 5.6e-05/0.004587, allocations: 20.23 kB / 327.1 MB, free: 15.21 MB / 302.1 MB Notification: Performance of NFVerifyModel.verify: time 5.595e-05/0.004643, allocations: 32.03 kB / 327.2 MB, free: 15.2 MB / 302.1 MB Notification: Performance of NFConvertDAE.convert: time 0.000167/0.00481, allocations: 78.14 kB / 327.3 MB, free: 15.17 MB / 302.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.717e-06/0.004813, allocations: 1.062 kB / 327.3 MB, free: 15.17 MB / 302.1 MB Notification: Performance of FrontEnd: time 8.92e-07/0.004814, allocations: 0 / 327.3 MB, free: 15.17 MB / 302.1 MB Notification: Performance of Transformations before backend: time 4.95e-06/0.004819, allocations: 0 / 327.3 MB, free: 15.17 MB / 302.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 17 * Number of variables: 17 Notification: Performance of Generate backend data structure: time 0.0005778/0.005397, allocations: 346.2 kB / 327.6 MB, free: 14.84 MB / 302.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.539e-05/0.005432, allocations: 11.12 kB / 327.6 MB, free: 14.84 MB / 302.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 4.033e-05/0.005473, allocations: 11.55 kB / 327.6 MB, free: 14.84 MB / 302.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002511/0.005724, allocations: 157 kB / 327.8 MB, free: 14.69 MB / 302.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.391e-05/0.005738, allocations: 5.031 kB / 327.8 MB, free: 14.68 MB / 302.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 1.926e-05/0.005757, allocations: 7.5 kB / 327.8 MB, free: 14.68 MB / 302.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004667/0.006224, allocations: 214.6 kB / 328 MB, free: 14.55 MB / 302.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.031e-05/0.006234, allocations: 192 / 328 MB, free: 14.55 MB / 302.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.131e-05/0.006245, allocations: 2.016 kB / 328 MB, free: 14.55 MB / 302.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.07e-06/0.00625, allocations: 2.5 kB / 328 MB, free: 14.55 MB / 302.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0001427/0.006393, allocations: 64.83 kB / 328.1 MB, free: 14.53 MB / 302.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0004302/0.006823, allocations: 313.5 kB / 328.4 MB, free: 14.23 MB / 302.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.000208/0.007031, allocations: 124.4 kB / 328.5 MB, free: 14.13 MB / 302.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001301/0.007161, allocations: 65.94 kB / 328.5 MB, free: 14.09 MB / 302.1 MB Notification: Performance of preOpt evalFunc (simulation): time 2.306e-05/0.007184, allocations: 7.047 kB / 328.6 MB, free: 14.09 MB / 302.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.297e-05/0.007217, allocations: 40.72 kB / 328.6 MB, free: 14.04 MB / 302.1 MB Notification: Performance of pre-optimization done (n=12): time 1.393e-06/0.007219, allocations: 5.312 kB / 328.6 MB, free: 14.04 MB / 302.1 MB Notification: Performance of matching and sorting (n=12): time 0.0004287/0.007647, allocations: 166.4 kB / 328.8 MB, free: 13.96 MB / 302.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 8.169e-05/0.007729, allocations: 107.8 kB / 328.9 MB, free: 13.84 MB / 302.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001604/0.00789, allocations: 165.4 kB / 329 MB, free: 13.71 MB / 302.1 MB Notification: Performance of collectPreVariables (initialization): time 2.148e-05/0.007911, allocations: 26.95 kB / 329.1 MB, free: 13.68 MB / 302.1 MB Notification: Performance of collectInitialEqns (initialization): time 6.909e-05/0.00798, allocations: 93.45 kB / 329.1 MB, free: 13.59 MB / 302.1 MB Notification: Performance of collectInitialBindings (initialization): time 1.416e-05/0.007994, allocations: 10.5 kB / 329.2 MB, free: 13.58 MB / 302.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 3.967e-05/0.008034, allocations: 21.12 kB / 329.2 MB, free: 13.56 MB / 302.1 MB Notification: Performance of setup shared object (initialization): time 0.0001573/0.008191, allocations: 323.5 kB / 329.5 MB, free: 13.24 MB / 302.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 4.037e-05/0.008232, allocations: 6.469 kB / 329.5 MB, free: 13.24 MB / 302.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 4.6e-05/0.008278, allocations: 22.2 kB / 329.5 MB, free: 13.22 MB / 302.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 7.885e-05/0.008356, allocations: 32.64 kB / 329.6 MB, free: 13.2 MB / 302.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.603e-06/0.008358, allocations: 0 / 329.6 MB, free: 13.2 MB / 302.1 MB Notification: Performance of matching and sorting (n=2) (initialization): time 0.0001305/0.008488, allocations: 63.81 kB / 329.6 MB, free: 13.15 MB / 302.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.693e-05/0.008505, allocations: 12.22 kB / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.847e-06/0.008509, allocations: 0 / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 1.887e-05/0.008528, allocations: 1.062 kB / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 6.008e-05/0.008588, allocations: 6.234 kB / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.759e-06/0.008593, allocations: 1.219 kB / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 3.431e-05/0.008627, allocations: 7.016 kB / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.793e-06/0.008634, allocations: 1.094 kB / 329.6 MB, free: 13.14 MB / 302.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 2 * Number of states: 0 () * Number of discrete variables: 2 (sample1.u,hold1.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (2): * Single equations (assignments): 2 * 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 0.0001062/0.00874, allocations: 121.4 kB / 329.8 MB, free: 13.02 MB / 302.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001807/0.008921, allocations: 108.2 kB / 329.9 MB, free: 12.96 MB / 302.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 5.11e-05/0.008972, allocations: 22.91 kB / 329.9 MB, free: 12.95 MB / 302.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.797e-06/0.008976, allocations: 6.312 kB / 329.9 MB, free: 12.94 MB / 302.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.147e-06/0.00898, allocations: 480 / 329.9 MB, free: 12.94 MB / 302.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.438e-06/0.008985, allocations: 1.688 kB / 329.9 MB, free: 12.94 MB / 302.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0003365/0.009321, allocations: 139.8 kB / 330 MB, free: 12.8 MB / 302.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.293e-06/0.009322, allocations: 1.312 kB / 330 MB, free: 12.8 MB / 302.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001226/0.009445, allocations: 27.02 kB / 330.1 MB, free: 12.79 MB / 302.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 3.046e-06/0.009448, allocations: 4.875 kB / 330.1 MB, free: 12.79 MB / 302.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.347e-05/0.009461, allocations: 3 kB / 330.1 MB, free: 12.79 MB / 302.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.488e-06/0.009466, allocations: 4.906 kB / 330.1 MB, free: 12.79 MB / 302.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.837e-06/0.00947, allocations: 9.344 kB / 330.1 MB, free: 12.78 MB / 302.1 MB [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/BackendDAETransform.mo:337:7-337:48:writable] Error: Internal error BackendDAETransform.analyseStrongComponentBlock failed (Purely discrete algebraic loops cannot be solved by iterative processes. Try to break them open using the delay() operator.) sum1.y sum2.u[2] sum2.y hold1.u hold1.y sample2.y sum1.u[2] sum1.y = sum1.k[1] * sum1.u[1] + sum1.k[2] * sum1.u[2] sum1.u[2] = sample2.y sample2.y = $getPart(hold1.y) hold1.y = $getPart(hold1.u) hold1.u = sum2.y sum2.y = sum2.k[1] * sum2.u[1] + sum2.k[2] * sum2.u[2] sum2.u[2] = sum1.y [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/BackendDAETransform.mo:347:7-347:48:writable] Error: Internal error BackendDAETransform.analyseStrongComponentBlock failed variables: sum1.y sum2.u[2] sum2.y hold1.u hold1.y sample2.y sum1.u[2] equations: sum1.y = sum1.k[1] * sum1.u[1] + sum1.k[2] * sum1.u[2] sum1.u[2] = sample2.y sample2.y = $getPart(hold1.y) hold1.y = $getPart(hold1.u) hold1.u = sum2.y sum2.y = sum2.k[1] * sum2.u[1] + sum2.k[2] * sum2.u[2] sum2.u[2] = sum1.y [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/BackendDAETransform.mo:351:7-351:90:writable] Error: Internal error function analyseStrongComponentBlock failed [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/BackendDAETransform.mo:202:5-202:89:writable] Error: Internal error function analyseStrongComponentScalar failed [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/BackendDAETransform.mo:113:7-113:113:writable] Error: Internal error function strongComponentsScalar failed (sorting strong components) [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/BackendDAEUtil.mo:7979:5-7979:89:writable] Error: Internal error Transformation module sort components failed Warning: The optimization module detectJacobianSparsePattern failed. This module will be skipped and the transformation process continued. Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0005023/0.009972, allocations: 374.8 kB / 330.5 MB, free: 12.53 MB / 302.1 MB Notification: Performance of postOpt removeConstants (simulation): time 5.431e-05/0.01003, allocations: 21.09 kB / 330.5 MB, free: 12.52 MB / 302.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 2.304e-05/0.01005, allocations: 5.625 kB / 330.5 MB, free: 12.52 MB / 302.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000119/0.01017, allocations: 8.656 kB / 330.5 MB, free: 12.52 MB / 302.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.332e-05/0.0102, allocations: 3.406 kB / 330.5 MB, free: 12.52 MB / 302.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.226e-06/0.01021, allocations: 7.625 kB / 330.5 MB, free: 12.51 MB / 302.1 MB Notification: Performance of sorting global known variables: time 0.0001097/0.01032, allocations: 124.7 kB / 330.6 MB, free: 12.42 MB / 302.1 MB Notification: Performance of sort global known variables: time 9e-08/0.01032, allocations: 0 / 330.6 MB, free: 12.42 MB / 302.1 MB Notification: Performance of remove unused functions: time 0.0002713/0.01059, allocations: 16.5 kB / 330.6 MB, free: 12.41 MB / 302.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 0 () * Number of discrete variables: 12 (sample1.u,hold1.y,sample1.y,hold1.u,sample2.y,sum1.u[1],sum1.u[2],sum1.y,sum2.u[1],sum2.u[2],sum2.y,integerConstant.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (12): * Single equations (assignments): 12 * 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 Backend phase and start with SimCode phase: time 0.0001189/0.01071, allocations: 98.17 kB / 330.7 MB, free: 12.32 MB / 302.1 MB Notification: Performance of simCode: created initialization part: time 0.0001822/0.01089, allocations: 54.39 kB / 330.8 MB, free: 12.31 MB / 302.1 MB Notification: Performance of simCode: created event and clocks part: time 1.613e-06/0.01089, allocations: 128 / 330.8 MB, free: 12.31 MB / 302.1 MB Notification: Performance of simCode: created simulation system equations: time 4.187e-05/0.01094, allocations: 12.73 kB / 330.8 MB, free: 12.3 MB / 302.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004725/0.01141, allocations: 73.23 kB / 330.9 MB, free: 12.27 MB / 302.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0005059/0.01191, allocations: 238.3 kB / 331.1 MB, free: 12.09 MB / 302.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001348/0.01205, allocations: 102.1 kB / 331.2 MB, free: 12.01 MB / 302.1 MB Notification: Performance of simCode: alias equations: time 2.423e-05/0.01207, allocations: 2.625 kB / 331.2 MB, free: 12.01 MB / 302.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 3.737e-05/0.01211, allocations: 11.94 kB / 331.2 MB, free: 12 MB / 302.1 MB Notification: Performance of SimCode: time 3.41e-07/0.01211, allocations: 4.125 kB / 331.2 MB, free: 12 MB / 302.1 MB Notification: Performance of Templates: time 0.004199/0.01631, allocations: 0.9163 MB / 332.1 MB, free: 11.68 MB / 302.1 MB " [Timeout remaining time 660] make -j1 -f Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.makefile [Timeout 660] (rm -f Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.pipe ; mkfifo Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.pipe ; head -c 1048576 < Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.pipe >> ../files/Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.sim & ./Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2 -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.pipe 2>&1) [Timeout 480] diffSimulationResults("Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2_res.mat","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v4.1.0/Modelica/Clocked/Examples/Elementary/IntegerSignals/Sample2/Sample2.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Modelica_4.1.0_Modelica.Clocked.Examples.Elementary.IntegerSignals.Sample2.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 660] "" [Timeout remaining time 660] Reference file matches [Calling sys.exit(0), Time elapsed: 4.346670873463154]