Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.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 0.0008798/0.0008798, allocations: 76.55 kB / 19.93 MB, free: 4.637 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 0.0008525/0.0008525, allocations: 177.9 kB / 23.22 MB, free: 1.352 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 0.8815/0.8815, allocations: 177.1 MB / 203.5 MB, free: 5.73 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 1.775/1.775, allocations: 377.9 MB / 0.6229 GB, free: 8.617 MB / 0.5886 GB " [Timeout remaining time 178] 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.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|actAirSet.uOpeMod|actAirSet.VCooMax_flow|actAirSet.VOccMin_flow|actAirSet.VActCooMax_flow|actAirSet.VActMin_flow|actAirSet.VActHeaMax_flow",fileNamePrefix="Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow") translateModel(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|actAirSet.uOpeMod|actAirSet.VCooMax_flow|actAirSet.VOccMin_flow|actAirSet.VActCooMax_flow|actAirSet.VActMin_flow|actAirSet.VActHeaMax_flow",fileNamePrefix="Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow") [Timeout 300] "Notification: Performance of FrontEnd - loaded program: time 3.507e-06/3.507e-06, allocations: 0 / 0.9822 GB, free: 2.02 MB / 0.9323 GB Notification: Performance of FrontEnd - Absyn->SCode: time 3.096e-05/3.447e-05, allocations: 2.281 kB / 0.9822 GB, free: 2.016 MB / 0.9323 GB Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow): time 0.001832/0.001867, allocations: 1.075 MB / 0.9833 GB, free: 0.9414 MB / 0.9323 GB Notification: Performance of NFInst.instExpressions: time 0.001112/0.002979, allocations: 1.038 MB / 0.9843 GB, free: 15.89 MB / 0.948 GB Notification: Performance of NFInst.updateImplicitVariability: time 8.466e-05/0.003064, allocations: 4 kB / 0.9843 GB, free: 15.89 MB / 0.948 GB Notification: Performance of NFTyping.typeComponents: time 5.087e-05/0.003114, allocations: 19.73 kB / 0.9843 GB, free: 15.87 MB / 0.948 GB Notification: Performance of NFTyping.typeBindings: time 0.0001176/0.003232, allocations: 43.59 kB / 0.9844 GB, free: 15.82 MB / 0.948 GB Notification: Performance of NFTyping.typeClassSections: time 0.0002648/0.003497, allocations: 83.84 kB / 0.9844 GB, free: 15.74 MB / 0.948 GB Notification: Performance of NFFlatten.flatten: time 0.0001762/0.003673, allocations: 228.2 kB / 0.9847 GB, free: 15.52 MB / 0.948 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0001858/0.003859, allocations: 92.64 kB / 0.9848 GB, free: 15.43 MB / 0.948 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0002458/0.004105, allocations: 139.6 kB / 0.9849 GB, free: 15.29 MB / 0.948 GB Notification: Performance of NFSimplifyModel.simplify: time 9.296e-05/0.004198, allocations: 83.69 kB / 0.985 GB, free: 15.21 MB / 0.948 GB Notification: Performance of NFPackage.collectConstants: time 3.212e-05/0.00423, allocations: 24 kB / 0.985 GB, free: 15.19 MB / 0.948 GB Notification: Performance of NFFlatten.collectFunctions: time 5.646e-05/0.004286, allocations: 28 kB / 0.985 GB, free: 15.16 MB / 0.948 GB Notification: Performance of NFScalarize.scalarize: time 3.343e-05/0.00432, allocations: 47.83 kB / 0.9851 GB, free: 15.11 MB / 0.948 GB Notification: Performance of NFVerifyModel.verify: time 5.138e-05/0.004371, allocations: 67.83 kB / 0.9851 GB, free: 15.05 MB / 0.948 GB Notification: Performance of NFConvertDAE.convert: time 0.0003093/0.00468, allocations: 318.8 kB / 0.9854 GB, free: 14.73 MB / 0.948 GB Notification: Performance of FrontEnd - DAE generated: time 5.26e-06/0.004686, allocations: 12 kB / 0.9854 GB, free: 14.72 MB / 0.948 GB Notification: Performance of FrontEnd: time 1.633e-06/0.004687, allocations: 0 / 0.9854 GB, free: 14.72 MB / 0.948 GB Notification: Performance of Transformations before backend: time 6.512e-06/0.004694, allocations: 0 / 0.9854 GB, free: 14.72 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: 52 * Number of variables: 52 Notification: Performance of Generate backend data structure: time 0.0005738/0.005267, allocations: 433.7 kB / 0.9859 GB, free: 14.27 MB / 0.948 GB Notification: Performance of prepare preOptimizeDAE: time 4.193e-05/0.005309, allocations: 8.031 kB / 0.9859 GB, free: 14.26 MB / 0.948 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001424/0.005452, allocations: 36.78 kB / 0.9859 GB, free: 14.22 MB / 0.948 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0003184/0.00577, allocations: 212.3 kB / 0.9861 GB, free: 13.99 MB / 0.948 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.303e-05/0.005793, allocations: 28.86 kB / 0.9861 GB, free: 13.96 MB / 0.948 GB Notification: Performance of preOpt expandDerOperator (simulation): time 2.295e-05/0.005816, allocations: 28.31 kB / 0.9862 GB, free: 13.93 MB / 0.948 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0002721/0.006088, allocations: 196.6 kB / 0.9863 GB, free: 13.74 MB / 0.948 GB Notification: Performance of preOpt findStateOrder (simulation): time 9.879e-06/0.006098, allocations: 192 / 0.9863 GB, free: 13.74 MB / 0.948 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.811e-05/0.006116, allocations: 12.38 kB / 0.9864 GB, free: 13.73 MB / 0.948 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.574e-06/0.006124, allocations: 4.375 kB / 0.9864 GB, free: 13.72 MB / 0.948 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0002434/0.006367, allocations: 161.8 kB / 0.9865 GB, free: 13.57 MB / 0.948 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0007573/0.007125, allocations: 487.4 kB / 0.987 GB, free: 13.06 MB / 0.948 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0002539/0.007379, allocations: 146.6 kB / 0.9871 GB, free: 12.91 MB / 0.948 GB Notification: Performance of preOpt resolveLoops (simulation): time 9.582e-05/0.007474, allocations: 60.83 kB / 0.9872 GB, free: 12.84 MB / 0.948 GB Notification: Performance of preOpt evalFunc (simulation): time 2.011e-05/0.007494, allocations: 0 / 0.9872 GB, free: 12.84 MB / 0.948 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.482e-05/0.007519, allocations: 42.55 kB / 0.9872 GB, free: 12.79 MB / 0.948 GB Notification: Performance of pre-optimization done (n=17): time 1.342e-06/0.007521, allocations: 0 / 0.9872 GB, free: 12.79 MB / 0.948 GB Notification: Performance of matching and sorting (n=17): time 0.0003853/0.007906, allocations: 212.2 kB / 0.9874 GB, free: 12.58 MB / 0.948 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.234e-05/0.007938, allocations: 55.41 kB / 0.9875 GB, free: 12.52 MB / 0.948 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.000126/0.008064, allocations: 187.1 kB / 0.9876 GB, free: 12.32 MB / 0.948 GB Notification: Performance of collectPreVariables (initialization): time 1.474e-05/0.008079, allocations: 29.7 kB / 0.9877 GB, free: 12.29 MB / 0.948 GB Notification: Performance of collectInitialEqns (initialization): time 7.196e-05/0.008151, allocations: 148.5 kB / 0.9878 GB, free: 12.14 MB / 0.948 GB Notification: Performance of collectInitialBindings (initialization): time 2.951e-05/0.00818, allocations: 43.59 kB / 0.9879 GB, free: 12.09 MB / 0.948 GB Notification: Performance of simplifyInitialFunctions (initialization): time 5.706e-05/0.008237, allocations: 57.64 kB / 0.9879 GB, free: 12.03 MB / 0.948 GB Notification: Performance of setup shared object (initialization): time 9.574e-05/0.008333, allocations: 326.8 kB / 0.9882 GB, free: 11.7 MB / 0.948 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001036/0.008437, allocations: 59.95 kB / 0.9883 GB, free: 11.64 MB / 0.948 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001125/0.008549, allocations: 103.4 kB / 0.9884 GB, free: 11.53 MB / 0.948 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0001898/0.008739, allocations: 144.9 kB / 0.9885 GB, free: 11.37 MB / 0.948 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.645e-06/0.008742, allocations: 0 / 0.9885 GB, free: 11.37 MB / 0.948 GB Notification: Performance of matching and sorting (n=22) (initialization): time 0.0002474/0.008989, allocations: 187.6 kB / 0.9887 GB, free: 11.18 MB / 0.948 GB Notification: Performance of prepare postOptimizeDAE: time 1.568e-05/0.009005, allocations: 8 kB / 0.9887 GB, free: 11.17 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.432e-06/0.009011, allocations: 0 / 0.9887 GB, free: 11.17 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.668e-05/0.009028, allocations: 7.938 kB / 0.9887 GB, free: 11.16 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001161/0.009144, allocations: 40.06 kB / 0.9888 GB, free: 11.12 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.051e-06/0.00915, allocations: 4 kB / 0.9888 GB, free: 11.12 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 5.553e-05/0.009206, allocations: 19.88 kB / 0.9888 GB, free: 11.1 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.256e-05/0.009218, allocations: 12 kB / 0.9888 GB, free: 11.09 MB / 0.948 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 15 (reaToInt2.y,actAirSet.or4.y,actAirSet.or2.y,actAirSet.or1.y,actAirSet.ifSetBac.y,actAirSet.ifWarUp.y,actAirSet.ifSetUp.y,actAirSet.ifCooDow.y,actAirSet.ifOcc.y,actAirSet.or3.y,actAirSet.warUpMod.y,actAirSet.setBacMod.y,actAirSet.setUpMod.y,actAirSet.cooDowMod.y,actAirSet.occMod.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (22): * Single equations (assignments): 22 * 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 0.0001521/0.00937, allocations: 138.4 kB / 0.9889 GB, free: 10.95 MB / 0.948 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 2.516e-05/0.009395, allocations: 19.89 kB / 0.9889 GB, free: 10.93 MB / 0.948 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 3.2e-05/0.009427, allocations: 17.8 kB / 0.989 GB, free: 10.91 MB / 0.948 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.639e-06/0.009432, allocations: 11.88 kB / 0.989 GB, free: 10.89 MB / 0.948 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.861e-06/0.009438, allocations: 4 kB / 0.989 GB, free: 10.89 MB / 0.948 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.557e-06/0.009442, allocations: 0 / 0.989 GB, free: 10.89 MB / 0.948 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0001763/0.009618, allocations: 189.2 kB / 0.9891 GB, free: 10.68 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.944e-06/0.00962, allocations: 3.938 kB / 0.9892 GB, free: 10.67 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 6.605e-05/0.009686, allocations: 23.92 kB / 0.9892 GB, free: 10.65 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.685e-06/0.009688, allocations: 0 / 0.9892 GB, free: 10.65 MB / 0.948 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.222e-05/0.009701, allocations: 7.984 kB / 0.9892 GB, free: 10.64 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.894e-06/0.009703, allocations: 4 kB / 0.9892 GB, free: 10.64 MB / 0.948 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.397e-06/0.009706, allocations: 7.938 kB / 0.9892 GB, free: 10.63 MB / 0.948 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0002536/0.00996, allocations: 257.6 kB / 0.9894 GB, free: 10.36 MB / 0.948 GB Notification: Performance of postOpt removeConstants (simulation): time 1.621e-05/0.009976, allocations: 15.91 kB / 0.9895 GB, free: 10.35 MB / 0.948 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 1.831e-05/0.009994, allocations: 7.984 kB / 0.9895 GB, free: 10.34 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 5.609e-05/0.01005, allocations: 8 kB / 0.9895 GB, free: 10.33 MB / 0.948 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.935e-05/0.01012, allocations: 27.89 kB / 0.9895 GB, free: 10.3 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.394e-06/0.01013, allocations: 4 kB / 0.9895 GB, free: 10.3 MB / 0.948 GB Notification: Performance of sorting global known variables: time 6.21e-05/0.01019, allocations: 120.2 kB / 0.9896 GB, free: 10.18 MB / 0.948 GB Notification: Performance of sort global known variables: time 6e-08/0.01019, allocations: 0 / 0.9896 GB, free: 10.18 MB / 0.948 GB Notification: Performance of remove unused functions: time 0.0001898/0.01038, allocations: 47.84 kB / 0.9897 GB, free: 10.14 MB / 0.948 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 10 (actAirSet.or3.y,actAirSet.ifOcc.y,actAirSet.ifCooDow.y,actAirSet.ifSetUp.y,actAirSet.ifWarUp.y,actAirSet.ifSetBac.y,actAirSet.or1.y,actAirSet.or2.y,actAirSet.or4.y,reaToInt2.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (17): * Single equations (assignments): 17 * 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 0.0001109/0.01049, allocations: 111.2 kB / 0.9898 GB, free: 10.02 MB / 0.948 GB Notification: Performance of simCode: created initialization part: time 0.0002529/0.01074, allocations: 147.8 kB / 0.9899 GB, free: 9.875 MB / 0.948 GB Notification: Performance of simCode: created event and clocks part: time 1.994e-06/0.01074, allocations: 0 / 0.9899 GB, free: 9.875 MB / 0.948 GB Notification: Performance of simCode: created simulation system equations: time 9.691e-05/0.01084, allocations: 72.2 kB / 0.99 GB, free: 9.805 MB / 0.948 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0002228/0.01106, allocations: 16 kB / 0.99 GB, free: 9.789 MB / 0.948 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0005197/0.01158, allocations: 374.6 kB / 0.9904 GB, free: 9.391 MB / 0.948 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 8.239e-05/0.01167, allocations: 125.2 kB / 0.9905 GB, free: 9.25 MB / 0.948 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 5.299e-05/0.01172, allocations: 20.5 kB / 0.9905 GB, free: 9.23 MB / 0.948 GB Notification: Performance of SimCode: time 5.61e-07/0.01172, allocations: 0 / 0.9905 GB, free: 9.23 MB / 0.948 GB Notification: Performance of Templates: time 0.002922/0.01464, allocations: 2.235 MB / 0.9927 GB, free: 7.008 MB / 0.948 GB " [Timeout remaining time 300] make -j1 -f Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.makefile [Timeout 300] (rm -f Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.pipe ; mkfifo Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.pipe ; head -c 1048576 < Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.pipe >> ../files/Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.sim & ./Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow -abortSlowSimulation -alarm=400 -emit_protected -lv LOG_STATS > Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.pipe 2>&1) [Timeout 400] diffSimulationResults("Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Controls_OBC_ASHRAE_G36_TerminalUnits_DualDuctMixConDischargeSensor_Subsequences_Validation_ActiveAirFlow.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Controls.OBC.ASHRAE.G36.TerminalUnits.DualDuctMixConDischargeSensor.Subsequences.Validation.ActiveAirFlow.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: 6.864438188262284]