Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr OpenIPSL_2.0.0_OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_Synchronous 0.93.0/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 2.0.0/package.mo", uses=false)
Using package OpenIPSL with version 2.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 2.0.0/package.mo)
Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo)
Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo)
Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo)
Using package Modelica_Synchronous with version 0.93.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_Synchronous 0.93.0/package.mo)
Running command: "" <> buildModelFMU(OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A,fileNamePrefix="OpenIPSL_2_0_0_OpenIPSL_Tests_Controls_PSSE_ES_ESDC2A",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A,fileNamePrefix="OpenIPSL_2_0_0_OpenIPSL_Tests_Controls_PSSE_ES_ESDC2A",fmuType="me",version="2.0",platforms={"static"})
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_Synchronous 0.93.0/package.mo): time 0.1379/0.1379, allocations: 12.2 MB / 27.18 MB, free: 1.504 MB / 19.63 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001092/0.001092, allocations: 107.6 kB / 30.68 MB, free: 4.859 MB / 26.18 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.63/1.63, allocations: 205.4 MB / 239.5 MB, free: 11.55 MB / 206.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001305/0.001305, allocations: 180.5 kB / 290.6 MB, free: 11.36 MB / 238.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 2.0.0/package.mo): time 0.4718/0.4718, allocations: 78.53 MB / 420.1 MB, free: 11.49 MB / 302.1 MB
Notification: Modelica_Synchronous requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed.
Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed.
Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed.
Notification: OpenIPSL requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed.
Notification: Performance of FrontEnd - loaded program: time 0.0009047/0.0009048, allocations: 28 kB / 0.4896 GB, free: 10.25 MB / 382.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3468/0.3477, allocations: 69.23 MB / 0.5572 GB, free: 21.01 MB / 382.1 MB
Notification: Performance of NFInst.instantiate(OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A): time 0.006433/0.3542, allocations: 8.092 MB / 0.5651 GB, free: 12.88 MB / 382.1 MB
Notification: Performance of NFInst.instExpressions: time 0.005502/0.3597, allocations: 2.71 MB / 0.5677 GB, free: 10.17 MB / 382.1 MB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001641/0.3614, allocations: 16 kB / 0.5677 GB, free: 10.15 MB / 382.1 MB
Notification: Performance of NFTyping.typeComponents: time 0.0009619/0.3624, allocations: 242.2 kB / 0.568 GB, free: 9.914 MB / 382.1 MB
Notification: Performance of NFTyping.typeBindings: time 0.003164/0.3656, allocations: 1.026 MB / 0.569 GB, free: 8.891 MB / 382.1 MB
Notification: Performance of NFTyping.typeClassSections: time 0.001629/0.3672, allocations: 0.678 MB / 0.5696 GB, free: 8.223 MB / 382.1 MB
Notification: Performance of NFFlatten.flatten: time 0.002514/0.3697, allocations: 2.299 MB / 0.5719 GB, free: 5.91 MB / 382.1 MB
Notification: Performance of NFFlatten.resolveConnections: time 0.0005805/0.3703, allocations: 391 kB / 0.5723 GB, free: 5.512 MB / 382.1 MB
Notification: Performance of NFEvalConstants.evaluate: time 0.0009931/0.3713, allocations: 0.8168 MB / 0.5731 GB, free: 4.691 MB / 382.1 MB
Notification: Performance of NFSimplifyModel.simplify: time 0.001027/0.3724, allocations: 1.058 MB / 0.5741 GB, free: 3.629 MB / 382.1 MB
Notification: Performance of NFPackage.collectConstants: time 0.000195/0.3726, allocations: 96 kB / 0.5742 GB, free: 3.535 MB / 382.1 MB
Notification: Performance of NFFlatten.collectFunctions: time 0.0007193/0.3733, allocations: 347.6 kB / 0.5745 GB, free: 3.195 MB / 382.1 MB
Notification: Performance of NFScalarize.scalarize: time 0.0002808/0.3736, allocations: 390.1 kB / 0.5749 GB, free: 2.812 MB / 382.1 MB
Notification: Performance of NFVerifyModel.verify: time 0.0002887/0.3739, allocations: 316.6 kB / 0.5752 GB, free: 2.496 MB / 382.1 MB
Notification: Performance of NFConvertDAE.convert: time 0.001373/0.3753, allocations: 1.917 MB / 0.5771 GB, free: 0.5742 MB / 382.1 MB
Notification: Performance of FrontEnd - DAE generated: time 6.132e-06/0.3753, allocations: 0 / 0.5771 GB, free: 0.5742 MB / 382.1 MB
Notification: Performance of FrontEnd: time 2.134e-06/0.3753, allocations: 0 / 0.5771 GB, free: 0.5742 MB / 382.1 MB
Notification: Performance of Transformations before backend: time 2.3e-05/0.3753, allocations: 4 kB / 0.5771 GB, free: 0.5703 MB / 382.1 MB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 270
 * Number of variables: 270
Notification: Performance of Generate backend data structure: time 0.01303/0.3884, allocations: 3.825 MB / 0.5808 GB, free: 12.69 MB / 398.1 MB
Notification: Performance of prepare preOptimizeDAE: time 6.237e-05/0.3885, allocations: 11.98 kB / 0.5808 GB, free: 12.68 MB / 398.1 MB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0006835/0.3891, allocations: 168.7 kB / 0.581 GB, free: 12.5 MB / 398.1 MB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004782/0.3939, allocations: 0.782 MB / 0.5817 GB, free: 11.71 MB / 398.1 MB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.00241/0.3964, allocations: 1.158 MB / 0.5829 GB, free: 10.51 MB / 398.1 MB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0005293/0.3969, allocations: 478.5 kB / 0.5833 GB, free: 9.965 MB / 398.1 MB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002356/0.3972, allocations: 120 kB / 0.5834 GB, free: 9.848 MB / 398.1 MB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.003226/0.4004, allocations: 1.626 MB / 0.585 GB, free: 8.172 MB / 398.1 MB
Notification: Performance of preOpt findStateOrder (simulation): time 2.2e-05/0.4004, allocations: 0 / 0.585 GB, free: 8.172 MB / 398.1 MB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001279/0.4006, allocations: 44 kB / 0.5851 GB, free: 8.129 MB / 398.1 MB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.75e-05/0.4006, allocations: 28 kB / 0.5851 GB, free: 8.102 MB / 398.1 MB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003132/0.4037, allocations: 1.519 MB / 0.5866 GB, free: 6.574 MB / 398.1 MB
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 0.01029/0.414, allocations: 5.559 MB / 0.592 GB, free: 0.7812 MB / 398.1 MB
Notification: Performance of preOpt comSubExp (simulation): time 0.008744/0.4228, allocations: 3.636 MB / 0.5955 GB, free: 13.01 MB / 414.1 MB
Notification: Performance of preOpt resolveLoops (simulation): time 0.002258/0.4251, allocations: 1.057 MB / 0.5966 GB, free: 11.94 MB / 414.1 MB
Notification: Performance of preOpt evalFunc (simulation): time 0.0006558/0.4258, allocations: 0.7336 MB / 0.5973 GB, free: 11.04 MB / 414.1 MB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002423/0.4282, allocations: 1.211 MB / 0.5985 GB, free: 9.809 MB / 414.1 MB
Notification: Performance of pre-optimization done (n=134): time 2.996e-06/0.4283, allocations: 0 / 0.5985 GB, free: 9.809 MB / 414.1 MB
Notification: Performance of matching and sorting (n=134): time 0.04078/0.469, allocations: 12.2 MB / 0.6104 GB, free: 13.56 MB / 430.1 MB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001224/0.4692, allocations: 120.1 kB / 0.6105 GB, free: 13.42 MB / 430.1 MB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003313/0.4726, allocations: 1.528 MB / 0.612 GB, free: 11.88 MB / 430.1 MB
Notification: Performance of collectPreVariables (initialization): time 0.0005789/0.4732, allocations: 57.7 kB / 0.6121 GB, free: 11.82 MB / 430.1 MB
Notification: Performance of collectInitialEqns (initialization): time 0.0007495/0.4739, allocations: 0.6515 MB / 0.6127 GB, free: 11.16 MB / 430.1 MB
Notification: Performance of collectInitialBindings (initialization): time 0.0009609/0.4749, allocations: 496.9 kB / 0.6132 GB, free: 10.67 MB / 430.1 MB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001752/0.4751, allocations: 44 kB / 0.6132 GB, free: 10.63 MB / 430.1 MB
Notification: Performance of setup shared object (initialization): time 0.0002685/0.4754, allocations: 378 kB / 0.6136 GB, free: 10.25 MB / 430.1 MB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.002637/0.478, allocations: 1.128 MB / 0.6147 GB, free: 9.121 MB / 430.1 MB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.00291/0.481, allocations: 1.352 MB / 0.616 GB, free: 7.703 MB / 430.1 MB
Notification: Performance of analyzeInitialSystem (initialization): time 0.002865/0.4838, allocations: 1.216 MB / 0.6172 GB, free: 6.488 MB / 430.1 MB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.306e-05/0.4839, allocations: 4 kB / 0.6172 GB, free: 6.484 MB / 430.1 MB
Notification: Performance of matching and sorting (n=262) (initialization): time 0.01141/0.4953, allocations: 4.378 MB / 0.6215 GB, free: 2.094 MB / 430.1 MB
Notification: Performance of prepare postOptimizeDAE: time 4.247e-05/0.4954, allocations: 12.06 kB / 0.6215 GB, free: 2.082 MB / 430.1 MB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.957e-05/0.4955, allocations: 8 kB / 0.6215 GB, free: 2.074 MB / 430.1 MB
Notification: Performance of postOpt tearingSystem (initialization): time 0.01013/0.5056, allocations: 3.054 MB / 0.6245 GB, free: 15.01 MB / 446.1 MB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002172/0.5078, allocations: 367.5 kB / 0.6248 GB, free: 14.65 MB / 446.1 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.007234/0.5151, allocations: 3.011 MB / 0.6278 GB, free: 11.61 MB / 446.1 MB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003294/0.5185, allocations: 310.1 kB / 0.6281 GB, free: 11.3 MB / 446.1 MB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.00041/0.5189, allocations: 79.91 kB / 0.6281 GB, free: 11.23 MB / 446.1 MB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 17
 * Number of states: 0 ()
 * Number of discrete variables: 2 ($whenCondition1,eSDC2A.rotatingExciterLimited.sISO.local_reset)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (205):
 * Single equations (assignments): 203
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 1
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {30 26}
Notification: Performance of prepare postOptimizeDAE: time 0.001041/0.52, allocations: 321.5 kB / 0.6284 GB, free: 10.9 MB / 446.1 MB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000566/0.5206, allocations: 173.8 kB / 0.6286 GB, free: 10.73 MB / 446.1 MB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01734/0.5379, allocations: 5.962 MB / 0.6344 GB, free: 4.75 MB / 446.1 MB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.441e-05/0.538, allocations: 15.98 kB / 0.6344 GB, free: 4.734 MB / 446.1 MB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.127e-05/0.538, allocations: 0 / 0.6344 GB, free: 4.734 MB / 446.1 MB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.957e-05/0.5381, allocations: 11.98 kB / 0.6344 GB, free: 4.723 MB / 446.1 MB
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 postOpt removeSimpleEquations (simulation): time 0.02068/0.5588, allocations: 8.207 MB / 0.6425 GB, free: 12.39 MB / 462.1 MB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.014e-05/0.5588, allocations: 0 / 0.6425 GB, free: 12.39 MB / 462.1 MB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.00117/0.56, allocations: 167.8 kB / 0.6426 GB, free: 12.22 MB / 462.1 MB
Notification: Performance of postOpt tearingSystem (simulation): time 0.007551/0.5676, allocations: 2.513 MB / 0.6451 GB, free: 9.703 MB / 462.1 MB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003034/0.5679, allocations: 35.98 kB / 0.6451 GB, free: 9.668 MB / 462.1 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.02407/0.592, allocations: 10.3 MB / 0.6552 GB, free: 15.22 MB / 478.1 MB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.958e-06/0.5921, allocations: 0 / 0.6552 GB, free: 15.22 MB / 478.1 MB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02045/0.6125, allocations: 7.295 MB / 0.6623 GB, free: 7.891 MB / 478.1 MB
Notification: Performance of postOpt removeConstants (simulation): time 0.000831/0.6134, allocations: 290.5 kB / 0.6626 GB, free: 7.586 MB / 478.1 MB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0007133/0.6141, allocations: 28 kB / 0.6626 GB, free: 7.559 MB / 478.1 MB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002103/0.6163, allocations: 187.8 kB / 0.6628 GB, free: 7.375 MB / 478.1 MB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001092/0.6174, allocations: 277.2 kB / 0.663 GB, free: 7.102 MB / 478.1 MB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002349/0.6176, allocations: 39.98 kB / 0.6631 GB, free: 7.062 MB / 478.1 MB
Notification: Performance of sorting global known variables: time 0.002345/0.62, allocations: 1.021 MB / 0.6641 GB, free: 6.047 MB / 478.1 MB
Notification: Performance of sort global known variables: time 4.41e-07/0.62, allocations: 0 / 0.6641 GB, free: 6.047 MB / 478.1 MB
Notification: Performance of remove unused functions: time 0.002685/0.6227, allocations: 0.566 MB / 0.6646 GB, free: 5.48 MB / 478.1 MB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 3
 * Number of states: 14 (gENCLS.omega,gENCLS.delta,gENCLS.eq,gENROE.w,gENROE.delta,gENROE.Epd,gENROE.Epq,gENROE.PSIkd,gENROE.PSIkq,eSDC2A.imDerivativeLag.x,eSDC2A.imLeadLag.TF.x_scaled[1],eSDC2A.rotatingExciterLimited.sISO.y,eSDC2A.TransducerDelay.state,eSDC2A.simpleLagLimVar.state)
 * Number of discrete variables: 1 ($whenCondition1)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (91):
 * Single equations (assignments): 90
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {26 23}
Notification: Performance of Backend phase and start with SimCode phase: time 0.02089/0.6436, allocations: 7.91 MB / 0.6724 GB, free: 13.53 MB / 494.1 MB
Notification: Performance of simCode: created initialization part: time 0.01015/0.6538, allocations: 3.362 MB / 0.6756 GB, free: 10.16 MB / 494.1 MB
Notification: Performance of simCode: created event and clocks part: time 8.355e-06/0.6539, allocations: 4 kB / 0.6756 GB, free: 10.16 MB / 494.1 MB
Notification: Performance of simCode: created simulation system equations: time 0.0067/0.6606, allocations: 2.249 MB / 0.6778 GB, free: 7.887 MB / 494.1 MB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002092/0.6627, allocations: 160.8 kB / 0.678 GB, free: 7.734 MB / 494.1 MB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.3107/0.9735, allocations: 15.17 MB / 0.6928 GB, free: 117.9 MB / 494.1 MB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001471/0.975, allocations: 1.278 MB / 0.6941 GB, free: 117.2 MB / 494.1 MB
Notification: Performance of simCode: alias equations: time 0.001254/0.9763, allocations: 163.8 kB / 0.6942 GB, free: 117.2 MB / 494.1 MB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001278/0.9775, allocations: 0.6677 MB / 0.6949 GB, free: 116.6 MB / 494.1 MB
Notification: Performance of SimCode: time 1.272e-06/0.9776, allocations: 3.656 kB / 0.6949 GB, free: 116.6 MB / 494.1 MB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.07805/1.056, allocations: 42.4 MB / 0.7363 GB, free: 79.79 MB / 494.1 MB
Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001658/1.056, allocations: 194.5 kB / 0.7365 GB, free: 79.55 MB / 494.1 MB
Notification: Performance of buildModelFMU: Generate platform static: time 3.168/4.223, allocations: 0 / 0.7365 GB, free: 79.55 MB / 494.1 MB
(rm -f OpenIPSL_2.0.0_OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A.pipe ; mkfifo OpenIPSL_2.0.0_OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A.pipe ; head -c 1048576 < OpenIPSL_2.0.0_OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A.pipe >> ../files/OpenIPSL_2.0.0_OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator  --tempDir=temp_OpenIPSL_2_0_0_OpenIPSL_Tests_Controls_PSSE_ES_ESDC2A_fmu --startTime=0 --stopTime=10 --timeout=50 --tolerance=1e-06 OpenIPSL_2_0_0_OpenIPSL_Tests_Controls_PSSE_ES_ESDC2A.fmu > OpenIPSL_2.0.0_OpenIPSL.Tests.Controls.PSSE.ES.ESDC2A.pipe 2>&1)
Environment - environmentSimulation: