Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180]
"[<interactive>:1:22-1:33:writable] Warning: Modelica only supports 32-bit signed integers! Transforming: 13743895347 into a real
[<interactive>:1:1-1:33:writable] Error: Class GC_set_max_heap_size not found in scope <global scope> (looking for a function or record).
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.0004844/0.0004844, 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 0.0004635/0.0004635, 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 0.3285/0.3285, 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 0.6976/0.6976, allocations: 0 / 0, free: 0 / 0
"
[Timeout remaining time 179]
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: "" <> buildModelFMU(Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R,fileNamePrefix="Buildings_12_Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R",fmuType="me_cs",version="3.0",platforms={"wasm"})
"" <> buildModelFMU(Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R,fileNamePrefix="Buildings_12_Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R",fmuType="me_cs",version="3.0",platforms={"wasm"}) [Timeout 300]
"Notification: Performance of FrontEnd - loaded program: time 2.785e-06/2.785e-06, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FrontEnd - Absyn->SCode: time 1.66e-05/1.939e-05, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R): time 0.09064/0.09066, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFInst.instExpressions: time 0.04213/0.1328, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFInst.updateImplicitVariability: time 0.006338/0.1391, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFTyping.typeComponents: time 0.01923/0.1584, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFTyping.typeBindings: time 0.01287/0.1712, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFTyping.typeClassSections: time 0.01018/0.1814, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFFlatten.flatten: time 0.01587/0.1973, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFFlatten.resolveConnections: time 0.02379/0.2211, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFEvalConstants.evaluate: time 0.01719/0.2383, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFSimplifyModel.simplify: time 0.01251/0.2508, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFPackage.collectConstants: time 0.00235/0.2531, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFFlatten.collectFunctions: time 0.005817/0.2589, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFScalarize.scalarize: time 0.008133/0.2671, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFVerifyModel.verify: time 0.008592/0.2757, allocations: 0 / 0, free: 0 / 0
Notification: Performance of NFConvertDAE.convert: time 0.02805/0.3037, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FrontEnd - DAE generated: time 0.003182/0.3069, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FrontEnd: time 8.236e-06/0.3069, allocations: 0 / 0, free: 0 / 0
Notification: Performance of Transformations before backend: time 0.0002061/0.3071, 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: 1286
 * Number of variables: 1286
Notification: Performance of Generate backend data structure: time 0.04447/0.3516, allocations: 0 / 0, free: 0 / 0
Notification: Performance of prepare preOptimizeDAE: time 0.000521/0.3521, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.007863/0.36, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.02529/0.3853, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt evaluateParameters (simulation): time 0.02167/0.4069, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001152/0.4081, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt expandDerOperator (simulation): time 0.004496/0.4126, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt clockPartitioning (simulation): time 0.05335/0.4659, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt findStateOrder (simulation): time 0.0004577/0.4664, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.003484/0.4699, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.001659/0.4715, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03565/0.5072, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.1035/0.6107, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt comSubExp (simulation): time 0.009812/0.6205, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt resolveLoops (simulation): time 0.006128/0.6266, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt evalFunc (simulation): time 0.0001068/0.6267, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0001425/0.6269, allocations: 0 / 0, free: 0 / 0
Notification: Performance of pre-optimization done (n=157): time 0.0005532/0.6274, allocations: 0 / 0, free: 0 / 0
Notification: Performance of matching and sorting (n=160): time 0.04215/0.6696, allocations: 0 / 0, free: 0 / 0
Notification: Performance of inlineWhenForInitialization (initialization): time 0.000149/0.6697, allocations: 0 / 0, free: 0 / 0
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.009751/0.6795, allocations: 0 / 0, free: 0 / 0
Notification: Performance of collectPreVariables (initialization): time 0.0009108/0.6804, allocations: 0 / 0, free: 0 / 0
Notification: Performance of collectInitialEqns (initialization): time 0.002967/0.6834, allocations: 0 / 0, free: 0 / 0
Notification: Performance of collectInitialBindings (initialization): time 0.001211/0.6846, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simplifyInitialFunctions (initialization): time 0.002994/0.6876, allocations: 0 / 0, free: 0 / 0
Notification: Performance of setup shared object (initialization): time 0.0002328/0.6878, allocations: 0 / 0, free: 0 / 0
Notification: Performance of preBalanceInitialSystem (initialization): time 0.005482/0.6933, allocations: 0 / 0, free: 0 / 0
Notification: Performance of partitionIndependentBlocks (initialization): time 0.006487/0.6998, allocations: 0 / 0, free: 0 / 0
Notification: Performance of analyzeInitialSystem (initialization): time 0.01277/0.7125, allocations: 0 / 0, free: 0 / 0
Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.847e-05/0.7126, allocations: 0 / 0, free: 0 / 0
Notification: Performance of matching and sorting (n=281) (initialization): time 0.02198/0.7346, allocations: 0 / 0, free: 0 / 0
Notification: Performance of prepare postOptimizeDAE: time 0.0001085/0.7347, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.625e-05/0.7348, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt tearingSystem (initialization): time 0.00766/0.7424, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003598/0.746, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.06123/0.8073, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00381/0.8111, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0007711/0.8118, allocations: 0 / 0, free: 0 / 0
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 101
 * 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 (227):
 * Single equations (assignments): 215
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 12
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 12 systems
   {(2,6,100.0%), (2,6,100.0%), (2,6,100.0%), (2,4,100.0%), (2,4,100.0%), (2,4,100.0%), (2,2,100.0%), (2,2,100.0%), (2,2,100.0%), (2,2,100.0%), (2,2,100.0%), (2,2,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 0 systems
Notification: Performance of prepare postOptimizeDAE: time 0.008857/0.8207, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.002039/0.8227, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01934/0.8421, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.678e-05/0.8421, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.914e-05/0.8422, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.274e-05/0.8422, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.04375/0.886, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.957e-05/0.886, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002228/0.8882, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt tearingSystem (simulation): time 0.007519/0.8957, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007213/0.8965, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.06021/0.9567, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.752e-05/0.9567, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01821/0.9749, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt removeConstants (simulation): time 0.005633/0.9805, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001757/0.9823, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002424/0.9847, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.003037/0.9878, allocations: 0 / 0, free: 0 / 0
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0005615/0.9883, allocations: 0 / 0, free: 0 / 0
Notification: Performance of sorting global known variables: time 0.005773/0.9941, allocations: 0 / 0, free: 0 / 0
Notification: Performance of sort global known variables: time 0.000108/0.9942, allocations: 0 / 0, free: 0 / 0
Notification: Performance of remove unused functions: time 0.009669/1.004, allocations: 0 / 0, free: 0 / 0
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 19
 * 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 simulation (109):
 * Single equations (assignments): 97
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 12
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 12 systems
   {(2,2,100.0%), (2,4,100.0%), (2,2,100.0%), (2,2,100.0%), (2,4,100.0%), (2,2,100.0%), (2,2,100.0%), (2,4,100.0%), (2,2,100.0%), (2,6,100.0%), (2,6,100.0%), (2,6,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 0 systems
Notification: Performance of Backend phase and start with SimCode phase: time 0.02021/1.024, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: created initialization part: time 0.0177/1.042, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: created event and clocks part: time 2.436e-05/1.042, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: created simulation system equations: time 0.0107/1.052, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01141/1.064, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.1324/1.196, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.01253/1.209, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: alias equations: time 0.003938/1.213, allocations: 0 / 0, free: 0 / 0
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.009999/1.223, allocations: 0 / 0, free: 0 / 0
Notification: Performance of SimCode: time 0.00443/1.227, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FMU modelDescription.xml: time 0.05696/1.284, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FMU model kernel: time 0.02859/1.313, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FMU translated model: time 0.08306/1.396, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FMU component link: time 2.091e-05/1.396, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FMU precompile: time 3.089e-05/1.396, allocations: 0 / 0, free: 0 / 0
Notification: Performance of FMU write (0.6 MB unzipped): time 0.0003096/1.396, allocations: 0 / 0, free: 0 / 0
Notification: Building FMU for platform 'wasm' (1/1).
Notification: Finished FMU for platform 'wasm' (1/1).
"
[Timeout remaining time 299]
simulate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R,startTime=0,stopTime=1,tolerance=1e-06,numberOfIntervals=2500,outputFormat="mat",variableFilter="time|R1.terminal.phase.1..v.1.|R2.terminal.phase.1..v.1.|R3.terminal.phase.1..v.1.|E.vPhase.1..terminal.v.1.|R1.load1.i.1.|R2.load1.i.1.|R3.load1.i.1.|sc_load.load1.i.1.",fileNamePrefix="Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R",simflags=" -alarm=240  -emit_protected -lv LOG_STATS -startTime=0 -stopTime=1 -tolerance=1e-06 -stepSize=0.0004 -r=Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_res.mat",resimulateExecutable="Buildings_12_Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R.fmu") [Timeout 240]
""
[Timeout remaining time 240]
diffSimulationResults("Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300]
""
[Timeout remaining time 300]
Reference file matches
simulate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R,startTime=0,stopTime=1,tolerance=1e-06,numberOfIntervals=2500,outputFormat="mat",variableFilter="time|R1.terminal.phase.1..v.1.|R2.terminal.phase.1..v.1.|R3.terminal.phase.1..v.1.|E.vPhase.1..terminal.v.1.|R1.load1.i.1.|R2.load1.i.1.|R3.load1.i.1.|sc_load.load1.i.1.",fileNamePrefix="Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R",simflags=" -alarm=240  -emit_protected -lv LOG_STATS -startTime=0 -stopTime=1 -tolerance=1e-06 -stepSize=0.0004 -r=Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_me_res.mat -s fmi3:me:daskr",resimulateExecutable="Buildings_12_Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R.fmu") [Timeout 240]
""
[Timeout remaining time 240]
diffSimulationResults("Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_me_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_me.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) [Timeout 300]
""
[Timeout remaining time 300]
Reference file matches
simulate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R,startTime=0,stopTime=1,tolerance=1e-06,numberOfIntervals=2500,outputFormat="mat",variableFilter="time|R1.terminal.phase.1..v.1.|R2.terminal.phase.1..v.1.|R3.terminal.phase.1..v.1.|E.vPhase.1..terminal.v.1.|R1.load1.i.1.|R2.load1.i.1.|R3.load1.i.1.|sc_load.load1.i.1.",fileNamePrefix="Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R",simflags=" -alarm=240  -emit_protected -lv LOG_STATS -startTime=0 -stopTime=1 -tolerance=1e-06 -stepSize=0.0004 -r=Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_cs_res.mat -s fmi3:cs",resimulateExecutable="Buildings_12_Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R.fmu") [Timeout 240]
""
[Timeout remaining time 240]
diffSimulationResults("Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_cs_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Electrical_AC_ThreePhasesUnbalanced_Lines_Examples_ACLine_R.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACLine_R_cs.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: 4.055874101934023]