Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.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 0.001002/0.001002, allocations: 80.92 kB / 20.76 MB, free: 3.734 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 0.001827/0.001827, allocations: 169 kB / 24.17 MB, free: 328 kB / 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 1.041/1.041, allocations: 177.2 MB / 204.6 MB, free: 5.48 MB / 186.7 MB
"
[Timeout remaining time 179]
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/package.mo", uses=false) [Timeout 180]
"[/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/Building/BuildingEnvelope/HeatTransfer/package.mo:2:1-40:17:writable] Warning: Soil_case_nappe was referenced in the package.order file, but was not found in package.mo, Soil_case_nappe/package.mo or Soil_case_nappe.mo.
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/package.mo): time 0.642/0.642, allocations: 110.2 MB / 371.3 MB, free: 12.33 MB / 346.7 MB
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:44:3-56:20:writable] Warning: External function annotation should occur on the external-clause, not on the function.
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:58:3-65:19:writable] Warning: External function annotation should occur on the external-clause, not on the function.
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:67:3-72:20:writable] Warning: External function annotation should occur on the external-clause, not on the function.
[/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:74:3-79:20:writable] Warning: External function annotation should occur on the external-clause, not on the function.
"
[Timeout remaining time 179]
Using package BuildSysPro with version 3.6.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/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(BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized")
translateModel(BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized") [Timeout 660]
"Notification: Performance of FrontEnd - loaded program: time 1.553e-06/1.553e-06, allocations: 0 / 422.4 MB, free: 9.297 MB / 394.7 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 2.298e-05/2.454e-05, allocations: 6.25 kB / 422.5 MB, free: 9.289 MB / 394.7 MB
Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized): time 0.3593/0.3593, allocations: 153.5 MB / 0.5625 GB, free: 6.461 MB / 0.4948 GB
Notification: Performance of NFInst.instExpressions: time 0.007542/0.3669, allocations: 4.306 MB / 0.5667 GB, free: 2.168 MB / 0.4948 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.00134/0.3682, allocations: 79.25 kB / 0.5668 GB, free: 2.09 MB / 0.4948 GB
Notification: Performance of NFTyping.typeComponents: time 0.0009472/0.3691, allocations: 404.9 kB / 0.5672 GB, free: 1.691 MB / 0.4948 GB
Notification: Performance of NFTyping.typeBindings: time 0.002284/0.3714, allocations: 1.264 MB / 0.5684 GB, free: 432 kB / 0.4948 GB
Notification: Performance of NFTyping.typeClassSections: time 0.002728/0.3741, allocations: 1.297 MB / 0.5697 GB, free: 15.12 MB / 0.5105 GB
Notification: Performance of NFFlatten.flatten: time 0.003849/0.378, allocations: 3.188 MB / 0.5728 GB, free: 11.93 MB / 0.5105 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001445/0.3794, allocations: 0.7904 MB / 0.5735 GB, free: 11.13 MB / 0.5105 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.002418/0.3819, allocations: 1.566 MB / 0.5751 GB, free: 9.559 MB / 0.5105 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.001901/0.3838, allocations: 0.7483 MB / 0.5758 GB, free: 8.809 MB / 0.5105 GB
Notification: Performance of NFPackage.collectConstants: time 0.0002403/0.384, allocations: 76 kB / 0.5759 GB, free: 8.734 MB / 0.5105 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0008048/0.3848, allocations: 227.6 kB / 0.5761 GB, free: 8.512 MB / 0.5105 GB
Notification: Performance of NFScalarize.scalarize: time 0.0005675/0.3854, allocations: 482.4 kB / 0.5766 GB, free: 8.039 MB / 0.5105 GB
Notification: Performance of NFVerifyModel.verify: time 0.00074/0.3861, allocations: 466.8 kB / 0.577 GB, free: 7.582 MB / 0.5105 GB
Notification: Performance of NFConvertDAE.convert: time 0.001532/0.3876, allocations: 1.074 MB / 0.578 GB, free: 6.504 MB / 0.5105 GB
Notification: Performance of FrontEnd - DAE generated: time 5.591e-06/0.3877, allocations: 3.938 kB / 0.5781 GB, free: 6.5 MB / 0.5105 GB
Notification: Performance of FrontEnd: time 1.673e-06/0.3877, allocations: 0 / 0.5781 GB, free: 6.5 MB / 0.5105 GB
Notification: Performance of Transformations before backend: time 1.662e-05/0.3877, allocations: 0 / 0.5781 GB, free: 6.5 MB / 0.5105 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 193
 * Number of variables: 193
Notification: Performance of Generate backend data structure: time 0.001582/0.3893, allocations: 1.52 MB / 0.5795 GB, free: 4.957 MB / 0.5105 GB
Notification: Performance of prepare preOptimizeDAE: time 4.563e-05/0.3893, allocations: 8.625 kB / 0.5795 GB, free: 4.949 MB / 0.5105 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004095/0.3897, allocations: 191.8 kB / 0.5797 GB, free: 4.762 MB / 0.5105 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.000958/0.3907, allocations: 0.7913 MB / 0.5805 GB, free: 3.918 MB / 0.5105 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001464/0.3908, allocations: 169 kB / 0.5807 GB, free: 3.727 MB / 0.5105 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 8.284e-05/0.3909, allocations: 88 kB / 0.5807 GB, free: 3.641 MB / 0.5105 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008098/0.3917, allocations: 0.793 MB / 0.5815 GB, free: 2.734 MB / 0.5105 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.243e-05/0.3917, allocations: 9.125 kB / 0.5815 GB, free: 2.727 MB / 0.5105 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.024e-05/0.3918, allocations: 36.7 kB / 0.5816 GB, free: 2.691 MB / 0.5105 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.109e-05/0.3918, allocations: 20 kB / 0.5816 GB, free: 2.672 MB / 0.5105 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0002929/0.3921, allocations: 261.6 kB / 0.5818 GB, free: 2.402 MB / 0.5105 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 0.002633/0.3947, allocations: 3.359 MB / 0.5851 GB, free: 14.9 MB / 0.5261 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0004164/0.3951, allocations: 0.8771 MB / 0.586 GB, free: 13.9 MB / 0.5261 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001262/0.3953, allocations: 185.4 kB / 0.5861 GB, free: 13.66 MB / 0.5261 GB
Notification: Performance of preOpt evalFunc (simulation): time 9.632e-05/0.3954, allocations: 27.92 kB / 0.5862 GB, free: 13.63 MB / 0.5261 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.392e-05/0.3954, allocations: 54.5 kB / 0.5862 GB, free: 13.57 MB / 0.5261 GB
Notification: Performance of pre-optimization done (n=31): time 1.964e-06/0.3954, allocations: 0 / 0.5862 GB, free: 13.57 MB / 0.5261 GB
Notification: Performance of matching and sorting (n=31): time 0.0007674/0.3962, allocations: 358.1 kB / 0.5866 GB, free: 13.21 MB / 0.5261 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001294/0.3963, allocations: 401.5 kB / 0.5869 GB, free: 12.73 MB / 0.5261 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0004933/0.3968, allocations: 0.7374 MB / 0.5877 GB, free: 11.97 MB / 0.5261 GB
Notification: Performance of collectPreVariables (initialization): time 3.311e-05/0.3968, allocations: 41.7 kB / 0.5877 GB, free: 11.93 MB / 0.5261 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0001922/0.397, allocations: 422.6 kB / 0.5881 GB, free: 11.5 MB / 0.5261 GB
Notification: Performance of collectInitialBindings (initialization): time 5.302e-05/0.3971, allocations: 115.1 kB / 0.5882 GB, free: 11.39 MB / 0.5261 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 8.432e-05/0.3972, allocations: 77.62 kB / 0.5883 GB, free: 11.31 MB / 0.5261 GB
Notification: Performance of setup shared object (initialization): time 7.906e-05/0.3972, allocations: 322.1 kB / 0.5886 GB, free: 10.99 MB / 0.5261 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 4.22e-05/0.3973, allocations: 30.81 kB / 0.5886 GB, free: 10.96 MB / 0.5261 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006825/0.398, allocations: 0.8972 MB / 0.5895 GB, free: 9.805 MB / 0.5261 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0001727/0.3981, allocations: 222.2 kB / 0.5897 GB, free: 9.535 MB / 0.5261 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.409e-06/0.3981, allocations: 4 kB / 0.5897 GB, free: 9.531 MB / 0.5261 GB
Notification: Performance of matching and sorting (n=37) (initialization): time 0.0002968/0.3984, allocations: 283.8 kB / 0.59 GB, free: 9.234 MB / 0.5261 GB
Notification: Performance of prepare postOptimizeDAE: time 1.809e-05/0.3984, allocations: 8 kB / 0.59 GB, free: 9.227 MB / 0.5261 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.665e-06/0.3985, allocations: 4 kB / 0.59 GB, free: 9.223 MB / 0.5261 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0002722/0.3987, allocations: 79.91 kB / 0.5901 GB, free: 9.141 MB / 0.5261 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001278/0.3989, allocations: 63.84 kB / 0.5901 GB, free: 9.078 MB / 0.5261 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001451/0.4003, allocations: 2.733 MB / 0.5928 GB, free: 6.18 MB / 0.5261 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002296/0.4005, allocations: 40.27 kB / 0.5929 GB, free: 6.141 MB / 0.5261 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.89e-05/0.4006, allocations: 16 kB / 0.5929 GB, free: 6.125 MB / 0.5261 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 15
 * 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 (31):
 * Single equations (assignments): 29
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 2 systems
   {(1,3,100.0%), (1,3,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 0 systems
Notification: Performance of prepare postOptimizeDAE: time 0.000172/0.4007, allocations: 152.5 kB / 0.593 GB, free: 5.965 MB / 0.5261 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001969/0.4009, allocations: 76.56 kB / 0.5931 GB, free: 5.891 MB / 0.5261 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 7.254e-05/0.401, allocations: 92.7 kB / 0.5932 GB, free: 5.797 MB / 0.5261 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.761e-06/0.401, allocations: 8.625 kB / 0.5932 GB, free: 5.789 MB / 0.5261 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 8.576e-06/0.401, allocations: 8.031 kB / 0.5932 GB, free: 5.781 MB / 0.5261 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.159e-06/0.401, allocations: 4 kB / 0.5932 GB, free: 5.777 MB / 0.5261 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001542/0.4026, allocations: 1.989 MB / 0.5951 GB, free: 3.66 MB / 0.5261 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.2e-06/0.4026, allocations: 4.5 kB / 0.5951 GB, free: 3.656 MB / 0.5261 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 8.421e-05/0.4027, allocations: 43.92 kB / 0.5952 GB, free: 3.613 MB / 0.5261 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0001839/0.4028, allocations: 91.38 kB / 0.5953 GB, free: 3.52 MB / 0.5261 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.377e-05/0.4029, allocations: 15.94 kB / 0.5953 GB, free: 3.504 MB / 0.5261 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001515/0.4044, allocations: 2.747 MB / 0.598 GB, free: 0.6055 MB / 0.5261 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.958e-06/0.4044, allocations: 7.938 kB / 0.598 GB, free: 0.5977 MB / 0.5261 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0003912/0.4048, allocations: 0.5378 MB / 0.5985 GB, free: 15.95 MB / 0.5417 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0001426/0.4049, allocations: 115.2 kB / 0.5986 GB, free: 15.84 MB / 0.5417 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 4.935e-05/0.405, allocations: 16.67 kB / 0.5986 GB, free: 15.82 MB / 0.5417 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001977/0.4052, allocations: 23.98 kB / 0.5986 GB, free: 15.8 MB / 0.5417 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 5.905e-05/0.4052, allocations: 39.77 kB / 0.5987 GB, free: 15.76 MB / 0.5417 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.834e-05/0.4052, allocations: 16 kB / 0.5987 GB, free: 15.74 MB / 0.5417 GB
Notification: Performance of sorting global known variables: time 0.0002588/0.4055, allocations: 377.3 kB / 0.5991 GB, free: 15.36 MB / 0.5417 GB
Notification: Performance of sort global known variables: time 4e-08/0.4055, allocations: 0 / 0.5991 GB, free: 15.36 MB / 0.5417 GB
Notification: Performance of remove unused functions: time 0.000703/0.4062, allocations: 299.3 kB / 0.5993 GB, free: 15.07 MB / 0.5417 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 23
 * 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 (25):
 * Single equations (assignments): 23
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 2 systems
   {(1,3,100.0%), (1,3,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 0 systems
Notification: Performance of Backend phase and start with SimCode phase: time 0.0002091/0.4064, allocations: 117 kB / 0.5995 GB, free: 14.95 MB / 0.5417 GB
Notification: Performance of simCode: created initialization part: time 0.0004313/0.4068, allocations: 410.2 kB / 0.5998 GB, free: 14.52 MB / 0.5417 GB
Notification: Performance of simCode: created event and clocks part: time 1.223e-05/0.4068, allocations: 12 kB / 0.5999 GB, free: 14.51 MB / 0.5417 GB
Notification: Performance of simCode: created simulation system equations: time 0.000213/0.4071, allocations: 345.5 kB / 0.6002 GB, free: 14.14 MB / 0.5417 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0009856/0.408, allocations: 433.8 kB / 0.6006 GB, free: 13.75 MB / 0.5417 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001888/0.4099, allocations: 1.733 MB / 0.6023 GB, free: 11.91 MB / 0.5417 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001548/0.4101, allocations: 230.8 kB / 0.6025 GB, free: 11.67 MB / 0.5417 GB
Notification: Performance of simCode: alias equations: time 0.0003082/0.4104, allocations: 132 kB / 0.6026 GB, free: 11.54 MB / 0.5417 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005804/0.411, allocations: 365 kB / 0.603 GB, free: 11.18 MB / 0.5417 GB
Notification: Performance of SimCode: time 1.232e-06/0.411, allocations: 0 / 0.603 GB, free: 11.18 MB / 0.5417 GB
Notification: Performance of Templates: time 0.02337/0.4343, allocations: 16.14 MB / 0.6187 GB, free: 11.64 MB / 0.5573 GB
"
[Timeout remaining time 660]
make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.makefile [Timeout 660]
(rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized -abortSlowSimulation -alarm=240 -s gbode -gbm=radauIIA3 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.FixedResistances.Validation.PressureDropsExplicitLinearized.pipe 2>&1) [Timeout 240]
[Calling sys.exit(0), Time elapsed: 4.211223260965198]