Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.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 0.001679/0.001679, allocations: 80.3 kB / 19.18 MB, free: 2.516 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 0.001801/0.001801, allocations: 158.2 kB / 22.45 MB, free: 5.375 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 1.572/1.572, allocations: 177.1 MB / 202.8 MB, free: 9.176 MB / 190.1 MB
"
[Timeout remaining time 178]
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 2.967/2.967, allocations: 377.8 MB / 0.6221 GB, free: 12.64 MB / 0.5919 GB
"
[Timeout remaining time 176]
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.Occupants.BaseClasses.Validation.BinaryVariableGeneration,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|y",fileNamePrefix="Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration")
translateModel(Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration,tolerance=1e-06,outputFormat="mat",numberOfIntervals=2500,variableFilter="time|y",fileNamePrefix="Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration") [Timeout 300]
"Notification: Performance of FrontEnd - loaded program: time 1.553e-06/1.553e-06, allocations: 0 / 0.9814 GB, free: 12.07 MB / 0.9356 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 2.646e-05/2.801e-05, allocations: 6.281 kB / 0.9814 GB, free: 12.06 MB / 0.9356 GB
Notification: Performance of NFInst.instantiate(Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration): time 0.002386/0.002414, allocations: 1.235 MB / 0.9826 GB, free: 10.81 MB / 0.9356 GB
Notification: Performance of NFInst.instExpressions: time 0.0008499/0.003264, allocations: 366.7 kB / 0.9829 GB, free: 10.45 MB / 0.9356 GB
Notification: Performance of NFInst.updateImplicitVariability: time 2.75e-05/0.003291, allocations: 0 / 0.9829 GB, free: 10.45 MB / 0.9356 GB
Notification: Performance of NFTyping.typeComponents: time 7.466e-05/0.003366, allocations: 7.938 kB / 0.9829 GB, free: 10.44 MB / 0.9356 GB
Notification: Performance of NFTyping.typeBindings: time 1.361e-05/0.003379, allocations: 0 / 0.9829 GB, free: 10.44 MB / 0.9356 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0005187/0.003898, allocations: 111.4 kB / 0.9831 GB, free: 10.33 MB / 0.9356 GB
Notification: Performance of NFFlatten.flatten: time 6.697e-05/0.003965, allocations: 15.97 kB / 0.9831 GB, free: 10.32 MB / 0.9356 GB
Notification: Performance of NFFlatten.resolveConnections: time 3.685e-05/0.004002, allocations: 4 kB / 0.9831 GB, free: 10.31 MB / 0.9356 GB
Notification: Performance of NFEvalConstants.evaluate: time 4.654e-05/0.004049, allocations: 11.98 kB / 0.9831 GB, free: 10.3 MB / 0.9356 GB
Notification: Performance of NFSimplifyModel.simplify: time 3.404e-05/0.004083, allocations: 7.938 kB / 0.9831 GB, free: 10.29 MB / 0.9356 GB
Notification: Performance of NFPackage.collectConstants: time 1.766e-05/0.0041, allocations: 0 / 0.9831 GB, free: 10.29 MB / 0.9356 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0002801/0.00438, allocations: 127.7 kB / 0.9832 GB, free: 10.17 MB / 0.9356 GB
Notification: Performance of NFScalarize.scalarize: time 4.473e-05/0.004425, allocations: 19.92 kB / 0.9832 GB, free: 10.15 MB / 0.9356 GB
Notification: Performance of NFVerifyModel.verify: time 3.862e-05/0.004464, allocations: 15.94 kB / 0.9832 GB, free: 10.13 MB / 0.9356 GB
Notification: Performance of NFConvertDAE.convert: time 0.00022/0.004684, allocations: 119.6 kB / 0.9834 GB, free: 10.02 MB / 0.9356 GB
Notification: Performance of FrontEnd - DAE generated: time 2.214e-06/0.004686, allocations: 0 / 0.9834 GB, free: 10.02 MB / 0.9356 GB
Notification: Performance of FrontEnd: time 6.31e-07/0.004687, allocations: 0 / 0.9834 GB, free: 10.02 MB / 0.9356 GB
Notification: Performance of Transformations before backend: time 3.837e-06/0.00469, allocations: 0 / 0.9834 GB, free: 10.02 MB / 0.9356 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 36
 * Number of variables: 36
Notification: Performance of Generate backend data structure: time 0.0005239/0.005214, allocations: 370.6 kB / 0.9837 GB, free: 9.617 MB / 0.9356 GB
Notification: Performance of prepare preOptimizeDAE: time 3.774e-05/0.005252, allocations: 12.03 kB / 0.9837 GB, free: 9.605 MB / 0.9356 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 9.069e-05/0.005343, allocations: 12.84 kB / 0.9837 GB, free: 9.594 MB / 0.9356 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0001186/0.005461, allocations: 113.7 kB / 0.9838 GB, free: 9.457 MB / 0.9356 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.854e-05/0.00548, allocations: 4.375 kB / 0.9839 GB, free: 9.453 MB / 0.9356 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 1.16e-05/0.005491, allocations: 4.375 kB / 0.9839 GB, free: 9.449 MB / 0.9356 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.000213/0.005704, allocations: 150 kB / 0.984 GB, free: 9.297 MB / 0.9356 GB
Notification: Performance of preOpt findStateOrder (simulation): time 8.065e-06/0.005713, allocations: 192 / 0.984 GB, free: 9.297 MB / 0.9356 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 1.123e-05/0.005724, allocations: 8.375 kB / 0.984 GB, free: 9.289 MB / 0.9356 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.727e-06/0.005727, allocations: 384 / 0.984 GB, free: 9.289 MB / 0.9356 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 8.29e-05/0.00581, allocations: 67.91 kB / 0.9841 GB, free: 9.223 MB / 0.9356 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0001612/0.005972, allocations: 113.2 kB / 0.9842 GB, free: 9.082 MB / 0.9356 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0001262/0.006098, allocations: 86.55 kB / 0.9843 GB, free: 8.988 MB / 0.9356 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001458/0.006244, allocations: 64.89 kB / 0.9843 GB, free: 8.922 MB / 0.9356 GB
Notification: Performance of preOpt evalFunc (simulation): time 1.141e-05/0.006255, allocations: 3.938 kB / 0.9843 GB, free: 8.918 MB / 0.9356 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0002533/0.006508, allocations: 184.9 kB / 0.9845 GB, free: 8.727 MB / 0.9356 GB
Notification: Performance of pre-optimization done (n=37): time 1.433e-06/0.00651, allocations: 0 / 0.9845 GB, free: 8.727 MB / 0.9356 GB
Notification: Performance of matching and sorting (n=37): time 0.0005779/0.007088, allocations: 401.6 kB / 0.9849 GB, free: 8.328 MB / 0.9356 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001131/0.007201, allocations: 87.36 kB / 0.985 GB, free: 8.23 MB / 0.9356 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001021/0.007303, allocations: 125.7 kB / 0.9851 GB, free: 8.098 MB / 0.9356 GB
Notification: Performance of collectPreVariables (initialization): time 5.59e-05/0.007359, allocations: 45.69 kB / 0.9851 GB, free: 8.047 MB / 0.9356 GB
Notification: Performance of collectInitialEqns (initialization): time 4.938e-05/0.007408, allocations: 92.73 kB / 0.9852 GB, free: 7.953 MB / 0.9356 GB
Notification: Performance of collectInitialBindings (initialization): time 9.84e-05/0.007506, allocations: 95.34 kB / 0.9853 GB, free: 7.859 MB / 0.9356 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001122/0.007619, allocations: 85.69 kB / 0.9854 GB, free: 7.77 MB / 0.9356 GB
Notification: Performance of setup shared object (initialization): time 0.0001686/0.007787, allocations: 338.8 kB / 0.9857 GB, free: 7.43 MB / 0.9356 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.000202/0.007989, allocations: 148.6 kB / 0.9859 GB, free: 7.285 MB / 0.9356 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002532/0.008243, allocations: 205.3 kB / 0.9861 GB, free: 7.062 MB / 0.9356 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0005058/0.008748, allocations: 405.3 kB / 0.9864 GB, free: 6.652 MB / 0.9356 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.585e-06/0.008751, allocations: 3.938 kB / 0.9864 GB, free: 6.648 MB / 0.9356 GB
Notification: Performance of matching and sorting (n=73) (initialization): time 0.0006153/0.009366, allocations: 438.6 kB / 0.9869 GB, free: 6.211 MB / 0.9356 GB
Notification: Performance of prepare postOptimizeDAE: time 1.387e-05/0.00938, allocations: 4 kB / 0.9869 GB, free: 6.207 MB / 0.9356 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.533e-05/0.009395, allocations: 4 kB / 0.9869 GB, free: 6.203 MB / 0.9356 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.695e-05/0.009412, allocations: 4 kB / 0.9869 GB, free: 6.199 MB / 0.9356 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001099/0.009522, allocations: 23.86 kB / 0.9869 GB, free: 6.176 MB / 0.9356 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.752e-05/0.00954, allocations: 15.86 kB / 0.9869 GB, free: 6.16 MB / 0.9356 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 7.005e-05/0.00961, allocations: 35.67 kB / 0.9869 GB, free: 6.125 MB / 0.9356 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.305e-05/0.009633, allocations: 12 kB / 0.987 GB, free: 6.113 MB / 0.9356 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 6
 * Number of states: 0 ()
 * Number of discrete variables: 71 (y,$PRE.y,state[33],$PRE.state[33],state[32],$PRE.state[32],state[31],$PRE.state[31],state[30],$PRE.state[30],state[29],$PRE.state[29],state[28],$PRE.state[28],state[27],$PRE.state[27],state[26],$PRE.state[26],state[25],$PRE.state[25],state[24],$PRE.state[24],state[23],$PRE.state[23],state[22],$PRE.state[22],state[21],$PRE.state[21],state[20],$PRE.state[20],state[19],$PRE.state[19],state[18],$PRE.state[18],state[17],$PRE.state[17],state[16],$PRE.state[16],state[15],$PRE.state[15],state[14],$PRE.state[14],state[13],$PRE.state[13],state[12],$PRE.state[12],state[11],$PRE.state[11],state[10],$PRE.state[10],state[9],$PRE.state[9],state[8],$PRE.state[8],state[7],$PRE.state[7],state[6],$PRE.state[6],state[5],$PRE.state[5],state[4],$PRE.state[4],state[3],$PRE.state[3],state[2],$PRE.state[2],state[1],$PRE.state[1],r,$PRE.r,$whenCondition1)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (41):
 * Single equations (assignments): 40
 * Array equations: 1
 * 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 0.0001996/0.009832, allocations: 181.8 kB / 0.9871 GB, free: 5.93 MB / 0.9356 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 1.601e-05/0.009848, allocations: 7.906 kB / 0.9871 GB, free: 5.922 MB / 0.9356 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 2.749e-05/0.009876, allocations: 9.312 kB / 0.9871 GB, free: 5.914 MB / 0.9356 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.573e-06/0.009877, allocations: 0 / 0.9871 GB, free: 5.914 MB / 0.9356 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 4.518e-06/0.009882, allocations: 0 / 0.9871 GB, free: 5.914 MB / 0.9356 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.452e-06/0.009888, allocations: 4.172 kB / 0.9872 GB, free: 5.91 MB / 0.9356 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0001301/0.01002, allocations: 121.1 kB / 0.9873 GB, free: 5.762 MB / 0.9356 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.71e-07/0.01002, allocations: 4 kB / 0.9873 GB, free: 5.758 MB / 0.9356 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 1.34e-05/0.01003, allocations: 3.984 kB / 0.9873 GB, free: 5.754 MB / 0.9356 GB
Notification: Performance of postOpt tearingSystem (simulation): time 3.948e-06/0.01004, allocations: 4 kB / 0.9873 GB, free: 5.75 MB / 0.9356 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.015e-05/0.01005, allocations: 4 kB / 0.9873 GB, free: 5.746 MB / 0.9356 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.302e-06/0.01005, allocations: 0 / 0.9873 GB, free: 5.746 MB / 0.9356 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 8.92e-07/0.01005, allocations: 0 / 0.9873 GB, free: 5.746 MB / 0.9356 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0004511/0.0105, allocations: 338.3 kB / 0.9876 GB, free: 5.395 MB / 0.9356 GB
Notification: Performance of postOpt removeConstants (simulation): time 1.748e-05/0.01052, allocations: 15.84 kB / 0.9876 GB, free: 5.379 MB / 0.9356 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.687e-05/0.01055, allocations: 23.98 kB / 0.9876 GB, free: 5.355 MB / 0.9356 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 2.004e-05/0.01057, allocations: 4 kB / 0.9876 GB, free: 5.352 MB / 0.9356 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 3.007e-05/0.0106, allocations: 7.984 kB / 0.9877 GB, free: 5.344 MB / 0.9356 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.36e-06/0.01061, allocations: 4 kB / 0.9877 GB, free: 5.34 MB / 0.9356 GB
Notification: Performance of sorting global known variables: time 7.005e-05/0.01068, allocations: 83.22 kB / 0.9877 GB, free: 5.258 MB / 0.9356 GB
Notification: Performance of sort global known variables: time 7e-08/0.01068, allocations: 0 / 0.9877 GB, free: 5.258 MB / 0.9356 GB
Notification: Performance of remove unused functions: time 0.0002939/0.01097, allocations: 47.94 kB / 0.9878 GB, free: 5.211 MB / 0.9356 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 0 ()
 * Number of discrete variables: 36 ($whenCondition1,y,state[1],state[2],state[3],state[4],state[5],state[6],state[7],state[8],state[9],state[10],state[11],state[12],state[13],state[14],state[15],state[16],state[17],state[18],state[19],state[20],state[21],state[22],state[23],state[24],state[25],state[26],state[27],state[28],state[29],state[30],state[31],state[32],state[33],r)
 * Number of discrete states: 33 (state[1],state[2],state[3],state[4],state[5],state[6],state[7],state[8],state[9],state[10],state[11],state[12],state[13],state[14],state[15],state[16],state[17],state[18],state[19],state[20],state[21],state[22],state[23],state[24],state[25],state[26],state[27],state[28],state[29],state[30],state[31],state[32],state[33])
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (4):
 * Single equations (assignments): 2
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 2
 * 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 0.0005239/0.0115, allocations: 209.2 kB / 0.988 GB, free: 5.016 MB / 0.9356 GB
Notification: Performance of simCode: created initialization part: time 0.0004184/0.01192, allocations: 272.7 kB / 0.9882 GB, free: 4.75 MB / 0.9356 GB
Notification: Performance of simCode: created event and clocks part: time 4.558e-06/0.01192, allocations: 4 kB / 0.9882 GB, free: 4.746 MB / 0.9356 GB
Notification: Performance of simCode: created simulation system equations: time 9.205e-05/0.01201, allocations: 75.91 kB / 0.9883 GB, free: 4.672 MB / 0.9356 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0001599/0.01217, allocations: 7.938 kB / 0.9883 GB, free: 4.664 MB / 0.9356 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0005292/0.0127, allocations: 279.8 kB / 0.9886 GB, free: 4.363 MB / 0.9356 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000103/0.01281, allocations: 101.3 kB / 0.9887 GB, free: 4.246 MB / 0.9356 GB
Notification: Performance of simCode: alias equations: time 3.888e-05/0.01284, allocations: 12.64 kB / 0.9887 GB, free: 4.234 MB / 0.9356 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 2.809e-05/0.01287, allocations: 16.5 kB / 0.9887 GB, free: 4.219 MB / 0.9356 GB
Notification: Performance of SimCode: time 3.8e-07/0.01287, allocations: 3.938 kB / 0.9887 GB, free: 4.215 MB / 0.9356 GB
Notification: Performance of Templates: time 0.005099/0.01797, allocations: 1.559 MB / 0.9902 GB, free: 2.676 MB / 0.9356 GB
"
[Timeout remaining time 300]
make -j1 -f Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.makefile [Timeout 300]
(rm -f Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.pipe ; mkfifo Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.pipe ; head -c 1048576 < Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.pipe >> ../files/Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.sim & ./Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration  -abortSlowSimulation -alarm=400  -emit_protected -lv LOG_STATS > Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.pipe 2>&1) [Timeout 400]
diffSimulationResults("Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_12.x/Buildings_Occupants_BaseClasses_Validation_BinaryVariableGeneration.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_12_Buildings.Occupants.BaseClasses.Validation.BinaryVariableGeneration.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: 8.423513650894165]