Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.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 0.001337/0.001337, allocations: 87.58 kB / 20.45 MB, free: 4.117 MB / 18.57 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 0.00154/0.00154, allocations: 161 kB / 23.82 MB, free: 0.75 MB / 18.57 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 0.9978/0.9978, allocations: 177.1 MB / 204.2 MB, free: 5.641 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.2-maint.12.x/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.2-maint.12.x/package.mo): time 1.887/1.887, allocations: 377.9 MB / 0.6236 GB, free: 8.535 MB / 0.5886 GB " [Timeout remaining time 177] Using package Buildings with version 12.1.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.1.2-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.Movers.Validation.PressureCurve,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|mov.dpMachine",fileNamePrefix="Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve") translateModel(Buildings.Fluid.Movers.Validation.PressureCurve,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|mov.dpMachine",fileNamePrefix="Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve") [Timeout 300] "Notification: Performance of FrontEnd - loaded program: time 1.262e-06/1.262e-06, allocations: 0 / 0.8115 GB, free: 1.727 MB / 0.7605 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.913e-05/2.039e-05, allocations: 3.562 kB / 0.8115 GB, free: 1.723 MB / 0.7605 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Movers.Validation.PressureCurve): time 0.1326/0.1326, allocations: 152.1 MB / 0.96 GB, free: 9.184 MB / 0.9167 GB Notification: Performance of NFInst.instExpressions: time 0.009697/0.1423, allocations: 7.107 MB / 0.967 GB, free: 2.062 MB / 0.9167 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.000813/0.1431, allocations: 59.56 kB / 0.967 GB, free: 2.004 MB / 0.9167 GB Notification: Performance of NFTyping.typeComponents: time 0.002452/0.1456, allocations: 1.4 MB / 0.9684 GB, free: 0.5977 MB / 0.9167 GB Notification: Performance of NFTyping.typeBindings: time 0.002083/0.1477, allocations: 1.527 MB / 0.9699 GB, free: 15.06 MB / 0.9323 GB Notification: Performance of NFTyping.typeClassSections: time 0.00203/0.1497, allocations: 1.259 MB / 0.9711 GB, free: 13.8 MB / 0.9323 GB Notification: Performance of NFFlatten.flatten: time 0.01063/0.1603, allocations: 11.35 MB / 0.9822 GB, free: 2.438 MB / 0.9323 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001147/0.1615, allocations: 0.821 MB / 0.983 GB, free: 1.609 MB / 0.9323 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001446/0.1629, allocations: 1.325 MB / 0.9843 GB, free: 288 kB / 0.9323 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001471/0.1644, allocations: 0.8711 MB / 0.9851 GB, free: 15.41 MB / 0.948 GB Notification: Performance of NFPackage.collectConstants: time 0.0001365/0.1645, allocations: 112 kB / 0.9852 GB, free: 15.3 MB / 0.948 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001591/0.1661, allocations: 1.173 MB / 0.9864 GB, free: 14.13 MB / 0.948 GB Notification: Performance of NFScalarize.scalarize: time 0.0004153/0.1665, allocations: 0.6544 MB / 0.987 GB, free: 13.47 MB / 0.948 GB Notification: Performance of NFVerifyModel.verify: time 0.0004246/0.167, allocations: 0.5182 MB / 0.9875 GB, free: 12.95 MB / 0.948 GB Notification: Performance of NFConvertDAE.convert: time 0.001919/0.1689, allocations: 1.935 MB / 0.9894 GB, free: 11.01 MB / 0.948 GB Notification: Performance of FrontEnd - DAE generated: time 3.447e-06/0.1689, allocations: 0 / 0.9894 GB, free: 11.01 MB / 0.948 GB Notification: Performance of FrontEnd: time 1.473e-06/0.1689, allocations: 4 kB / 0.9894 GB, free: 11.01 MB / 0.948 GB Notification: Performance of Transformations before backend: time 1.447e-05/0.1689, allocations: 0 / 0.9894 GB, free: 11.01 MB / 0.948 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 145 * Number of variables: 145 Notification: Performance of Generate backend data structure: time 0.001921/0.1708, allocations: 2.113 MB / 0.9915 GB, free: 8.84 MB / 0.948 GB Notification: Performance of prepare preOptimizeDAE: time 4.23e-05/0.1709, allocations: 8.031 kB / 0.9915 GB, free: 8.832 MB / 0.948 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001612/0.1725, allocations: 0.584 MB / 0.9921 GB, free: 8.246 MB / 0.948 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002758/0.1752, allocations: 2.105 MB / 0.9941 GB, free: 6.074 MB / 0.948 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.486e-05/0.1753, allocations: 45.31 kB / 0.9942 GB, free: 6.031 MB / 0.948 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.535e-05/0.1754, allocations: 67.94 kB / 0.9942 GB, free: 5.965 MB / 0.948 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007879/0.1762, allocations: 0.6208 MB / 0.9948 GB, free: 5.293 MB / 0.948 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.274e-05/0.1762, allocations: 0 / 0.9948 GB, free: 5.293 MB / 0.948 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.866e-05/0.1762, allocations: 20 kB / 0.9949 GB, free: 5.273 MB / 0.948 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.651e-05/0.1762, allocations: 29.28 kB / 0.9949 GB, free: 5.242 MB / 0.948 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004593/0.1767, allocations: 283.6 kB / 0.9952 GB, free: 4.965 MB / 0.948 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 0.003064/0.1798, allocations: 3.364 MB / 0.9984 GB, free: 1.477 MB / 0.948 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006696/0.1804, allocations: 282 kB / 0.9987 GB, free: 1.191 MB / 0.948 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001534/0.1806, allocations: 103.6 kB / 0.9988 GB, free: 1.086 MB / 0.948 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001016/0.1807, allocations: 19.98 kB / 0.9988 GB, free: 1.066 MB / 0.948 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.528e-05/0.1807, allocations: 41.39 kB / 0.9989 GB, free: 1.016 MB / 0.948 GB Notification: Performance of pre-optimization done (n=29): time 1.242e-06/0.1807, allocations: 0 / 0.9989 GB, free: 1.016 MB / 0.948 GB Notification: Performance of matching and sorting (n=29): time 0.001349/0.1821, allocations: 0.5561 MB / 0.9994 GB, free: 460 kB / 0.948 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.577e-05/0.1821, allocations: 51.41 kB / 0.9995 GB, free: 396 kB / 0.948 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001157/0.1832, allocations: 1.371 MB / 1.001 GB, free: 15 MB / 0.9636 GB Notification: Performance of collectPreVariables (initialization): time 4.014e-05/0.1833, allocations: 33.7 kB / 1.001 GB, free: 14.96 MB / 0.9636 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004797/0.1838, allocations: 0.8081 MB / 1.002 GB, free: 14.14 MB / 0.9636 GB Notification: Performance of collectInitialBindings (initialization): time 8.063e-05/0.1838, allocations: 111 kB / 1.002 GB, free: 14.03 MB / 0.9636 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001425/0.184, allocations: 127.8 kB / 1.002 GB, free: 13.89 MB / 0.9636 GB Notification: Performance of setup shared object (initialization): time 0.0001174/0.1841, allocations: 0.4965 MB / 1.002 GB, free: 13.39 MB / 0.9636 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00018/0.1843, allocations: 105.6 kB / 1.002 GB, free: 13.28 MB / 0.9636 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003425/0.1846, allocations: 0.5515 MB / 1.003 GB, free: 12.57 MB / 0.9636 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004513/0.1851, allocations: 458.3 kB / 1.003 GB, free: 12.02 MB / 0.9636 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.505e-06/0.1851, allocations: 0 / 1.003 GB, free: 12.02 MB / 0.9636 GB Notification: Performance of matching and sorting (n=57) (initialization): time 0.000729/0.1858, allocations: 0.5894 MB / 1.004 GB, free: 11.43 MB / 0.9636 GB Notification: Performance of prepare postOptimizeDAE: time 1.309e-05/0.1858, allocations: 8 kB / 1.004 GB, free: 11.42 MB / 0.9636 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.833e-06/0.1858, allocations: 8.031 kB / 1.004 GB, free: 11.41 MB / 0.9636 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002202/0.1861, allocations: 59.64 kB / 1.004 GB, free: 11.35 MB / 0.9636 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002714/0.1863, allocations: 115.8 kB / 1.004 GB, free: 11.23 MB / 0.9636 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0003655/0.1867, allocations: 0.8624 MB / 1.005 GB, free: 10.34 MB / 0.9636 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003253/0.187, allocations: 71.61 kB / 1.005 GB, free: 10.27 MB / 0.9636 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.156e-05/0.1871, allocations: 63.92 kB / 1.005 GB, free: 10.21 MB / 0.9636 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0002891/0.1874, allocations: 223.9 kB / 1.005 GB, free: 9.98 MB / 0.9636 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0006581/0.188, allocations: 0.5359 MB / 1.006 GB, free: 9.289 MB / 0.9636 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.000408/0.1884, allocations: 432.1 kB / 1.006 GB, free: 8.766 MB / 0.9636 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.733e-06/0.1884, allocations: 0 / 1.006 GB, free: 8.766 MB / 0.9636 GB Notification: Performance of matching and sorting (n=57) (initialization_lambda0): time 0.0007874/0.1892, allocations: 0.5822 MB / 1.007 GB, free: 8.172 MB / 0.9636 GB Notification: Performance of prepare postOptimizeDAE: time 7.665e-06/0.1892, allocations: 8 kB / 1.007 GB, free: 8.164 MB / 0.9636 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.61e-06/0.1892, allocations: 12.03 kB / 1.007 GB, free: 8.152 MB / 0.9636 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0003701/0.1896, allocations: 159.5 kB / 1.007 GB, free: 7.992 MB / 0.9636 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002518/0.1899, allocations: 111.8 kB / 1.007 GB, free: 7.883 MB / 0.9636 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0003466/0.1902, allocations: 0.8663 MB / 1.008 GB, free: 6.984 MB / 0.9636 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003111/0.1905, allocations: 63.78 kB / 1.008 GB, free: 6.922 MB / 0.9636 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.702e-05/0.1906, allocations: 43.98 kB / 1.008 GB, free: 6.879 MB / 0.9636 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * 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): 48 * Array equations: 1 * 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 {(1,3)} Notification: Performance of prepare postOptimizeDAE: time 0.0001486/0.1907, allocations: 307.8 kB / 1.008 GB, free: 6.57 MB / 0.9636 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001243/0.1908, allocations: 151.1 kB / 1.009 GB, free: 6.422 MB / 0.9636 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006662/0.1915, allocations: 464.2 kB / 1.009 GB, free: 5.957 MB / 0.9636 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.158e-06/0.1915, allocations: 8 kB / 1.009 GB, free: 5.949 MB / 0.9636 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.247e-06/0.1915, allocations: 0 / 1.009 GB, free: 5.949 MB / 0.9636 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.262e-06/0.1915, allocations: 7.922 kB / 1.009 GB, free: 5.941 MB / 0.9636 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001483/0.193, allocations: 1.365 MB / 1.01 GB, free: 4.492 MB / 0.9636 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.154e-06/0.193, allocations: 224 / 1.01 GB, free: 4.492 MB / 0.9636 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.000213/0.1932, allocations: 71.95 kB / 1.01 GB, free: 4.422 MB / 0.9636 GB Notification: Performance of postOpt tearingSystem (simulation): time 9.913e-05/0.1933, allocations: 47.59 kB / 1.01 GB, free: 4.371 MB / 0.9636 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.852e-05/0.1933, allocations: 15.98 kB / 1.01 GB, free: 4.355 MB / 0.9636 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0003092/0.1937, allocations: 0.8429 MB / 1.011 GB, free: 3.48 MB / 0.9636 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.215e-06/0.1937, allocations: 3.984 kB / 1.011 GB, free: 3.477 MB / 0.9636 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.000713/0.1944, allocations: 0.7079 MB / 1.012 GB, free: 2.715 MB / 0.9636 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002157/0.1946, allocations: 182.9 kB / 1.012 GB, free: 2.535 MB / 0.9636 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.702e-05/0.1947, allocations: 11.94 kB / 1.012 GB, free: 2.523 MB / 0.9636 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002802/0.1949, allocations: 27.97 kB / 1.012 GB, free: 2.496 MB / 0.9636 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.955e-05/0.195, allocations: 31.89 kB / 1.012 GB, free: 2.465 MB / 0.9636 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.249e-05/0.195, allocations: 24 kB / 1.012 GB, free: 2.441 MB / 0.9636 GB Notification: Performance of sorting global known variables: time 0.000964/0.196, allocations: 0.7777 MB / 1.013 GB, free: 1.668 MB / 0.9636 GB Notification: Performance of sort global known variables: time 8e-08/0.196, allocations: 0 / 1.013 GB, free: 1.668 MB / 0.9636 GB Notification: Performance of remove unused functions: time 0.0009378/0.1969, allocations: 0.5692 MB / 1.014 GB, free: 1.098 MB / 0.9636 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 1 (mov.motSpe.y) * 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 (27): * Single equations (assignments): 26 * 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 {(1,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0004605/0.1974, allocations: 290.7 kB / 1.014 GB, free: 0.8047 MB / 0.9636 GB Notification: Performance of simCode: created initialization part: time 0.000834/0.1982, allocations: 0.5193 MB / 1.014 GB, free: 284 kB / 0.9636 GB Notification: Performance of simCode: created event and clocks part: time 1.913e-06/0.1982, allocations: 4 kB / 1.014 GB, free: 280 kB / 0.9636 GB Notification: Performance of simCode: created simulation system equations: time 0.0001908/0.1984, allocations: 140.3 kB / 1.014 GB, free: 136 kB / 0.9636 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001723/0.2001, allocations: 0.9071 MB / 1.015 GB, free: 15.25 MB / 0.9792 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003216/0.2034, allocations: 2.298 MB / 1.018 GB, free: 12.87 MB / 0.9792 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002311/0.2036, allocations: 332.6 kB / 1.018 GB, free: 12.52 MB / 0.9792 GB Notification: Performance of simCode: alias equations: time 0.0007545/0.2043, allocations: 368.4 kB / 1.018 GB, free: 12.15 MB / 0.9792 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002157/0.2046, allocations: 124.5 kB / 1.018 GB, free: 12.03 MB / 0.9792 GB Notification: Performance of SimCode: time 6.52e-07/0.2046, allocations: 0 / 1.018 GB, free: 12.03 MB / 0.9792 GB Notification: Performance of Templates: time 0.4457/0.6502, allocations: 32.88 MB / 1.05 GB, free: 115.4 MB / 0.9948 GB " [Timeout remaining time 299] make -j1 -f Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.makefile [Timeout 300] (rm -f Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.pipe ; mkfifo Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.pipe ; head -c 1048576 < Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.pipe >> ../files/Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.sim & ./Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve -abortSlowSimulation -alarm=240 -emit_protected -lv LOG_STATS > Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve.pipe 2>&1) [Timeout 240] diffSimulationResults("Buildings_12_Buildings.Fluid.Movers.Validation.PressureCurve_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Fluid_Movers_Validation_PressureCurve.csv","",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300] "" [Timeout remaining time 300] Reference file matches [Calling sys.exit(0), Time elapsed: 6.4949748129583895]