Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Fluid.SolarCollectors.Validation.EN12975_Array.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "[:1:22-1:33:writable] Warning: Modelica only supports 32-bit signed integers! Transforming: 13743895347 into a real Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.0002464/0.0002464, allocations: 0 / 0, free: 0 / 0 " [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 0.0001819/0.0001819, allocations: 0 / 0, free: 0 / 0 " [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 0.1507/0.1507, allocations: 0 / 0, free: 0 / 0 " [Timeout remaining time 180] 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 0.2877/0.2877, allocations: 0 / 0, free: 0 / 0 " [Timeout remaining time 180] 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: simulate(Buildings.Fluid.SolarCollectors.Validation.EN12975_Array,startTime=0,stopTime=86400,tolerance=1e-06,numberOfIntervals=2500,outputFormat="mat",variableFilter="time|solCol.sta_b.T|solCol1.sta_b.T|solCol2.sta_b.T|dT.y|solCol.m_flow|solCol1.m_flow|solCol2.m_flow|solCol.dp|solCol1.dp|solCol2.dp",fileNamePrefix="Buildings_12_Buildings.Fluid.SolarCollectors.Validation.EN12975_Array",simflags="-abortSlowSimulation -alarm=240 -emit_protected -lv LOG_STATS") simulate(Buildings.Fluid.SolarCollectors.Validation.EN12975_Array,startTime=0,stopTime=86400,tolerance=1e-06,numberOfIntervals=2500,outputFormat="mat",variableFilter="time|solCol.sta_b.T|solCol1.sta_b.T|solCol2.sta_b.T|dT.y|solCol.m_flow|solCol1.m_flow|solCol2.m_flow|solCol.dp|solCol1.dp|solCol2.dp",fileNamePrefix="Buildings_12_Buildings.Fluid.SolarCollectors.Validation.EN12975_Array",simflags="-abortSlowSimulation -alarm=240 -emit_protected -lv LOG_STATS") [Timeout 540] "Notification: Performance of FrontEnd - loaded program: time 2.805e-06/2.805e-06, allocations: 0 / 0, free: 0 / 0 Notification: Performance of FrontEnd - Absyn->SCode: time 2.591e-05/2.871e-05, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFInst.instantiate(Buildings.Fluid.SolarCollectors.Validation.EN12975_Array): time 0.03971/0.03974, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFInst.instExpressions: time 0.2191/0.2589, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFInst.updateImplicitVariability: time 0.006412/0.2653, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFTyping.typeComponents: time 0.006006/0.2713, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFTyping.typeBindings: time 0.01486/0.2861, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFTyping.typeClassSections: time 0.0124/0.2985, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFFlatten.flatten: time 0.02247/0.321, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFFlatten.resolveConnections: time 0.0124/0.3334, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFEvalConstants.evaluate: time 0.02426/0.3577, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFSimplifyModel.simplify: time 0.01199/0.3696, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFPackage.collectConstants: time 0.002576/0.3722, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFFlatten.collectFunctions: time 0.005403/0.3776, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFScalarize.scalarize: time 0.00627/0.3839, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFVerifyModel.verify: time 0.01205/0.3959, allocations: 0 / 0, free: 0 / 0 Notification: Performance of NFConvertDAE.convert: time 0.02346/0.4194, allocations: 0 / 0, free: 0 / 0 Notification: Performance of FrontEnd - DAE generated: time 0.003922/0.4233, allocations: 0 / 0, free: 0 / 0 Notification: Performance of FrontEnd: time 4.017e-06/0.4233, allocations: 0 / 0, free: 0 / 0 Notification: Performance of Transformations before backend: time 0.0003934/0.4237, allocations: 0 / 0, free: 0 / 0 Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1604 * Number of variables: 1604 Notification: Performance of Generate backend data structure: time 0.02071/0.4444, allocations: 0 / 0, free: 0 / 0 Notification: Performance of prepare preOptimizeDAE: time 0.0007298/0.4452, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt normalInlineFunction (simulation): time 0.008427/0.4536, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt evaluateParameters (simulation): time 0.01033/0.4639, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0006271/0.4645, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt expandDerOperator (simulation): time 0.001611/0.4662, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt clockPartitioning (simulation): time 0.01092/0.4771, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt findStateOrder (simulation): time 0.0001507/0.4772, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0006862/0.4779, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0002922/0.4782, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005583/0.4838, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.03303/0.5168, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt comSubExp (simulation): time 0.005104/0.5219, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt resolveLoops (simulation): time 0.001736/0.5237, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt evalFunc (simulation): time 0.0007361/0.5244, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002974/0.5274, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preOpt simplifyInStream (simulation): time 0.001675/0.529, allocations: 0 / 0, free: 0 / 0 Notification: Performance of pre-optimization done (n=451): time 3.006e-05/0.5291, allocations: 0 / 0, free: 0 / 0 Notification: Performance of matching and sorting (n=451): time 0.005988/0.5351, allocations: 0 / 0, free: 0 / 0 Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001283/0.5352, allocations: 0 / 0, free: 0 / 0 Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.005547/0.5407, allocations: 0 / 0, free: 0 / 0 Notification: Performance of collectPreVariables (initialization): time 0.0008751/0.5416, allocations: 0 / 0, free: 0 / 0 Notification: Performance of collectInitialEqns (initialization): time 0.002242/0.5439, allocations: 0 / 0, free: 0 / 0 Notification: Performance of collectInitialBindings (initialization): time 0.001536/0.5454, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simplifyInitialFunctions (initialization): time 0.001467/0.5469, allocations: 0 / 0, free: 0 / 0 Notification: Performance of setup shared object (initialization): time 2.145e-05/0.5469, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preBalanceInitialSystem (initialization): time 0.001461/0.5483, allocations: 0 / 0, free: 0 / 0 Notification: Performance of partitionIndependentBlocks (initialization): time 0.001739/0.5501, allocations: 0 / 0, free: 0 / 0 Notification: Performance of analyzeInitialSystem (initialization): time 0.003641/0.5537, allocations: 0 / 0, free: 0 / 0 Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.688e-05/0.5538, allocations: 0 / 0, free: 0 / 0 Notification: Performance of matching and sorting (n=639) (initialization): time 0.004966/0.5587, allocations: 0 / 0, free: 0 / 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001108/0.5588, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.52e-05/0.5589, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt tearingSystem (initialization): time 6.818e-05/0.559, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003446/0.5624, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0001104/0.5625, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002844/0.5654, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005553/0.5659, allocations: 0 / 0, free: 0 / 0 Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.003251/0.5692, allocations: 0 / 0, free: 0 / 0 Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001851/0.571, allocations: 0 / 0, free: 0 / 0 Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003553/0.5746, allocations: 0 / 0, free: 0 / 0 Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.354e-05/0.5746, allocations: 0 / 0, free: 0 / 0 Notification: Performance of matching and sorting (n=639) (initialization_lambda0): time 0.004943/0.5796, allocations: 0 / 0, free: 0 / 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001251/0.5797, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.55e-05/0.5797, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt tearingSystem (initialization): time 6.824e-05/0.5798, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003377/0.5832, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.52e-05/0.5833, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002821/0.5861, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005077/0.5866, allocations: 0 / 0, free: 0 / 0 Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 108 * Number of states: 0 () * Number of discrete variables: 57 (weaDat.conTim.canRepeatWeatherFile,weaDat.conTimMin.canRepeatWeatherFile,weaDat.decAng.k,$PRE.weaDat.decAng.k,weaDat.decAng.tNext,$PRE.weaDat.decAng.tNext,weaDat.eqnTim.k,$PRE.weaDat.eqnTim.k,weaDat.eqnTim.tNext,$PRE.weaDat.eqnTim.tNext,weaDat.conTim.k,$PRE.weaDat.conTim.k,weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.k,$PRE.weaDat.conTimMin.k,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,weaDat.locTim.k,$PRE.weaDat.locTim.k,weaDat.locTim.tNext,$PRE.weaDat.locTim.tNext,solCol2.HDirTil.incAng.decAng.k,$PRE.solCol2.HDirTil.incAng.decAng.k,solCol2.HDirTil.incAng.decAng.tNext,$PRE.solCol2.HDirTil.incAng.decAng.tNext,solCol2.HDifTilIso.incAng.decAng.k,$PRE.solCol2.HDifTilIso.incAng.decAng.k,solCol2.HDifTilIso.incAng.decAng.tNext,$PRE.solCol2.HDifTilIso.incAng.decAng.tNext,solCol1.HDirTil.incAng.decAng.k,$PRE.solCol1.HDirTil.incAng.decAng.k,solCol1.HDirTil.incAng.decAng.tNext,$PRE.solCol1.HDirTil.incAng.decAng.tNext,solCol1.HDifTilIso.incAng.decAng.k,$PRE.solCol1.HDifTilIso.incAng.decAng.k,solCol1.HDifTilIso.incAng.decAng.tNext,$PRE.solCol1.HDifTilIso.incAng.decAng.tNext,solCol.HDirTil.incAng.decAng.k,$PRE.solCol.HDirTil.incAng.decAng.k,solCol.HDirTil.incAng.decAng.tNext,$PRE.solCol.HDirTil.incAng.decAng.tNext,solCol.HDifTilIso.incAng.decAng.k,$PRE.solCol.HDifTilIso.incAng.decAng.k,solCol.HDifTilIso.incAng.decAng.tNext,$PRE.solCol.HDifTilIso.incAng.decAng.tNext,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6,$whenCondition7,$whenCondition8,$whenCondition9,$whenCondition10,$whenCondition11) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (612): * Single equations (assignments): 609 * Array equations: 0 * Algorithm blocks: 3 * 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 0.002339/0.5889, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000961/0.5899, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.006895/0.5968, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.219e-05/0.5969, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt constantLinearSystem (simulation): time 1.436e-05/0.5969, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003019/0.5999, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01438/0.6143, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.236e-05/0.6143, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002966/0.6173, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt tearingSystem (simulation): time 4.336e-05/0.6173, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003747/0.6177, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.034e-05/0.6178, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.408e-05/0.6178, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005803/0.6236, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt removeConstants (simulation): time 0.002009/0.6256, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001773/0.6274, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002289/0.6296, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0007946/0.6304, allocations: 0 / 0, free: 0 / 0 Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0004706/0.6309, allocations: 0 / 0, free: 0 / 0 Notification: Performance of sorting global known variables: time 0.00289/0.6338, allocations: 0 / 0, free: 0 / 0 Notification: Performance of sort global known variables: time 0.0001791/0.634, allocations: 0 / 0, free: 0 / 0 Notification: Performance of remove unused functions: time 0.008821/0.6428, allocations: 0 / 0, free: 0 / 0 Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 44 * Number of states: 9 (solCol.vol[1].dynBal.U,solCol.vol[2].dynBal.U,solCol.vol[3].dynBal.U,solCol1.vol[1].dynBal.U,solCol1.vol[2].dynBal.U,solCol1.vol[3].dynBal.U,solCol2.vol[1].dynBal.U,solCol2.vol[2].dynBal.U,solCol2.vol[3].dynBal.U) * Number of discrete variables: 33 ($whenCondition11,$whenCondition10,$whenCondition9,$whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,solCol.HDifTilIso.incAng.decAng.tNext,solCol.HDifTilIso.incAng.decAng.k,solCol.HDirTil.incAng.decAng.tNext,solCol.HDirTil.incAng.decAng.k,solCol1.HDifTilIso.incAng.decAng.tNext,solCol1.HDifTilIso.incAng.decAng.k,solCol1.HDirTil.incAng.decAng.tNext,solCol1.HDirTil.incAng.decAng.k,solCol2.HDifTilIso.incAng.decAng.tNext,solCol2.HDifTilIso.incAng.decAng.k,solCol2.HDirTil.incAng.decAng.tNext,solCol2.HDirTil.incAng.decAng.k,weaDat.locTim.tNext,weaDat.locTim.k,weaDat.conTimMin.tNext,weaDat.conTimMin.k,weaDat.conTim.tNext,weaDat.conTim.k,weaDat.eqnTim.tNext,weaDat.eqnTim.k,weaDat.decAng.tNext,weaDat.decAng.k) * Number of discrete states: 22 (weaDat.conTimMin.tNext,weaDat.conTimMin.k,weaDat.locTim.tNext,weaDat.locTim.k,weaDat.conTim.tNext,weaDat.conTim.k,weaDat.eqnTim.tNext,weaDat.eqnTim.k,solCol1.HDifTilIso.incAng.decAng.tNext,solCol1.HDifTilIso.incAng.decAng.k,solCol1.HDirTil.incAng.decAng.tNext,solCol1.HDirTil.incAng.decAng.k,solCol.HDifTilIso.incAng.decAng.tNext,solCol.HDifTilIso.incAng.decAng.k,solCol.HDirTil.incAng.decAng.tNext,solCol.HDirTil.incAng.decAng.k,solCol2.HDifTilIso.incAng.decAng.tNext,solCol2.HDifTilIso.incAng.decAng.k,solCol2.HDirTil.incAng.decAng.tNext,solCol2.HDirTil.incAng.decAng.k,weaDat.decAng.tNext,weaDat.decAng.k) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (502): * Single equations (assignments): 471 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 9 * When equations: 22 * 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 0.004057/0.6469, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created initialization part: time 0.008658/0.6555, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created event and clocks part: time 1.649e-05/0.6555, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created simulation system equations: time 0.002251/0.6578, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.009888/0.6677, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01868/0.6864, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002676/0.689, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: alias equations: time 0.007007/0.696, allocations: 0 / 0, free: 0 / 0 Notification: Performance of simCode: all other stuff during SimCode phase: time 0.006504/0.7025, allocations: 0 / 0, free: 0 / 0 Notification: Performance of SimCode: time 0.000323/0.7029, allocations: 0 / 0, free: 0 / 0 Notification: Performance of Templates: time 0.02352/0.7264, allocations: 0 / 0, free: 0 / 0 " [Timeout remaining time 539] diffSimulationResults("Buildings_12_Buildings.Fluid.SolarCollectors.Validation.EN12975_Array_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Fluid_SolarCollectors_Validation_EN12975_Array.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: 2.244755128864199]