Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.conf.json
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/Complex 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/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false)
Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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 Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+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)
Running command: translateModel(Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer")
translateModel(Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008314/0.0008314, allocations: 96.62 kB / 15.36 MB, free: 0.7305 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001117/0.001118, allocations: 173.2 kB / 16.27 MB, free: 6.66 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.918/1.918, allocations: 205.4 MB / 222.4 MB, free: 5.555 MB / 174.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.861/1.861, allocations: 292.7 MB / 0.5502 GB, free: 14.46 MB / 462.1 MB
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: Performance of FrontEnd - loaded program: time 0.0005279/0.0005284, allocations: 17.14 kB / 0.6743 GB, free: 25.75 MB / 0.5294 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2871/0.2876, allocations: 116.3 MB / 0.7879 GB, free: 11.53 MB / 0.6075 GB
Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer): time 0.006507/0.2942, allocations: 4.811 MB / 0.7926 GB, free: 6.691 MB / 0.6075 GB
Notification: Performance of NFInst.instExpressions: time 0.006292/0.3005, allocations: 4.046 MB / 0.7965 GB, free: 2.629 MB / 0.6075 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0006114/0.3012, allocations: 15.88 kB / 0.7965 GB, free: 2.613 MB / 0.6075 GB
Notification: Performance of NFTyping.typeComponents: time 0.0004225/0.3016, allocations: 95.25 kB / 0.7966 GB, free: 2.52 MB / 0.6075 GB
Notification: Performance of NFTyping.typeBindings: time 0.001818/0.3035, allocations: 0.611 MB / 0.7972 GB, free: 1.906 MB / 0.6075 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001289/0.3048, allocations: 453 kB / 0.7977 GB, free: 1.465 MB / 0.6075 GB
Notification: Performance of NFFlatten.flatten: time 0.001574/0.3064, allocations: 1.411 MB / 0.799 GB, free: 52 kB / 0.6075 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001218/0.3076, allocations: 0.6732 MB / 0.7997 GB, free: 15.34 MB / 0.6231 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0005249/0.3081, allocations: 342.6 kB / 0.8 GB, free: 15 MB / 0.6231 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0006907/0.3088, allocations: 490.1 kB / 0.8005 GB, free: 14.52 MB / 0.6231 GB
Notification: Performance of NFPackage.collectConstants: time 7.734e-05/0.3089, allocations: 32 kB / 0.8005 GB, free: 14.49 MB / 0.6231 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.001705/0.3106, allocations: 0.9824 MB / 0.8015 GB, free: 13.51 MB / 0.6231 GB
Notification: Performance of NFScalarize.scalarize: time 0.000308/0.3109, allocations: 267.2 kB / 0.8017 GB, free: 13.25 MB / 0.6231 GB
Notification: Performance of NFVerifyModel.verify: time 0.0003849/0.3113, allocations: 371.8 kB / 0.8021 GB, free: 12.88 MB / 0.6231 GB
Notification: Performance of NFConvertDAE.convert: time 0.001667/0.313, allocations: 1.316 MB / 0.8034 GB, free: 11.55 MB / 0.6231 GB
Notification: Performance of FrontEnd - DAE generated: time 4.769e-06/0.313, allocations: 0 / 0.8034 GB, free: 11.55 MB / 0.6231 GB
Notification: Performance of FrontEnd: time 1.674e-06/0.313, allocations: 0 / 0.8034 GB, free: 11.55 MB / 0.6231 GB
Notification: Performance of Transformations before backend: time 9.689e-06/0.313, allocations: 0 / 0.8034 GB, free: 11.55 MB / 0.6231 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 181
 * Number of variables: 181
Notification: Performance of Generate backend data structure: time 0.001792/0.3148, allocations: 0.9353 MB / 0.8043 GB, free: 10.57 MB / 0.6231 GB
Notification: Performance of prepare preOptimizeDAE: time 4.449e-05/0.3149, allocations: 12.03 kB / 0.8043 GB, free: 10.56 MB / 0.6231 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.009068/0.324, allocations: 1.618 MB / 0.8059 GB, free: 8.938 MB / 0.6231 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009797/0.325, allocations: 0.5512 MB / 0.8064 GB, free: 8.34 MB / 0.6231 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.942e-05/0.325, allocations: 45.67 kB / 0.8065 GB, free: 8.297 MB / 0.6231 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.000157/0.3252, allocations: 64.36 kB / 0.8065 GB, free: 8.234 MB / 0.6231 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.004654/0.3299, allocations: 1.837 MB / 0.8083 GB, free: 6.324 MB / 0.6231 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.479e-05/0.3299, allocations: 0 / 0.8083 GB, free: 6.324 MB / 0.6231 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001262/0.33, allocations: 27.98 kB / 0.8084 GB, free: 6.297 MB / 0.6231 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0002238/0.3303, allocations: 117.3 kB / 0.8085 GB, free: 6.184 MB / 0.6231 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.007655/0.3379, allocations: 2.48 MB / 0.8109 GB, free: 3.699 MB / 0.6231 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 0.009137/0.3471, allocations: 6.365 MB / 0.8171 GB, free: 12.93 MB / 0.6387 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.003467/0.3506, allocations: 1.37 MB / 0.8184 GB, free: 11.51 MB / 0.6387 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.00258/0.3532, allocations: 0.8987 MB / 0.8193 GB, free: 10.59 MB / 0.6387 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.002696/0.3559, allocations: 2.158 MB / 0.8214 GB, free: 8.34 MB / 0.6387 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.67e-05/0.356, allocations: 42.56 kB / 0.8215 GB, free: 8.289 MB / 0.6387 GB
Notification: Performance of pre-optimization done (n=69): time 3.497e-06/0.356, allocations: 4 kB / 0.8215 GB, free: 8.285 MB / 0.6387 GB
Notification: Performance of matching and sorting (n=93): time 0.02238/0.3784, allocations: 6.64 MB / 0.828 GB, free: 1.621 MB / 0.6387 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001176/0.3785, allocations: 195.8 kB / 0.8281 GB, free: 1.387 MB / 0.6387 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.000759/0.3793, allocations: 0.5251 MB / 0.8287 GB, free: 0.8477 MB / 0.6387 GB
Notification: Performance of collectPreVariables (initialization): time 0.0001278/0.3794, allocations: 45.7 kB / 0.8287 GB, free: 0.7969 MB / 0.6387 GB
Notification: Performance of collectInitialEqns (initialization): time 0.000268/0.3797, allocations: 386.8 kB / 0.8291 GB, free: 420 kB / 0.6387 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0003093/0.38, allocations: 319.3 kB / 0.8294 GB, free: 96 kB / 0.6387 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001921/0.3802, allocations: 101.7 kB / 0.8295 GB, free: 15.98 MB / 0.6544 GB
Notification: Performance of setup shared object (initialization): time 0.0001674/0.3804, allocations: 378.8 kB / 0.8298 GB, free: 15.61 MB / 0.6544 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.002863/0.3833, allocations: 0.9977 MB / 0.8308 GB, free: 14.61 MB / 0.6544 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.003014/0.3863, allocations: 1.291 MB / 0.8321 GB, free: 13.2 MB / 0.6544 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.005735/0.392, allocations: 2.289 MB / 0.8343 GB, free: 10.8 MB / 0.6544 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.927e-06/0.3921, allocations: 3.938 kB / 0.8343 GB, free: 10.8 MB / 0.6544 GB
Notification: Performance of matching and sorting (n=152) (initialization): time 0.01005/0.4021, allocations: 3.345 MB / 0.8376 GB, free: 7.434 MB / 0.6544 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0003372/0.4025, allocations: 342.3 kB / 0.8379 GB, free: 6.984 MB / 0.6544 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.238e-05/0.4025, allocations: 8 kB / 0.8379 GB, free: 6.977 MB / 0.6544 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.004702/0.4072, allocations: 1.103 MB / 0.839 GB, free: 5.859 MB / 0.6544 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002264/0.4095, allocations: 459.3 kB / 0.8394 GB, free: 5.41 MB / 0.6544 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01189/0.4214, allocations: 8.956 MB / 0.8482 GB, free: 11.93 MB / 0.67 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002394/0.4239, allocations: 307.5 kB / 0.8485 GB, free: 11.63 MB / 0.67 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001515/0.4241, allocations: 67.97 kB / 0.8485 GB, free: 11.56 MB / 0.67 GB
Notification: Performance of prepare postOptimizeDAE: time 1.053e-05/0.4241, allocations: 4 kB / 0.8485 GB, free: 11.56 MB / 0.67 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.0092/0.4333, allocations: 3.02 MB / 0.8515 GB, free: 8.523 MB / 0.67 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.465e-05/0.4334, allocations: 8 kB / 0.8515 GB, free: 8.516 MB / 0.67 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.003182/0.4365, allocations: 0.7674 MB / 0.8522 GB, free: 7.738 MB / 0.67 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002511/0.4391, allocations: 487.2 kB / 0.8527 GB, free: 7.262 MB / 0.67 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.009154/0.4483, allocations: 6.939 MB / 0.8595 GB, free: 15.91 MB / 0.6856 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002344/0.4507, allocations: 291.6 kB / 0.8597 GB, free: 15.63 MB / 0.6856 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001737/0.4509, allocations: 63.95 kB / 0.8598 GB, free: 15.57 MB / 0.6856 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 37
 * 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 (124):
 * Single equations (assignments): 120
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 4
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 3 systems
   {(2,6,100.0%), (2,6,100.0%), (2,6,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(2,6)}
Notification: Performance of prepare postOptimizeDAE: time 0.0007937/0.4517, allocations: 363.1 kB / 0.8602 GB, free: 15.2 MB / 0.6856 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002541/0.4519, allocations: 71.16 kB / 0.8602 GB, free: 15.13 MB / 0.6856 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.009742/0.4617, allocations: 3.105 MB / 0.8633 GB, free: 12 MB / 0.6856 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.625e-05/0.4617, allocations: 12 kB / 0.8633 GB, free: 11.99 MB / 0.6856 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.744e-05/0.4618, allocations: 4 kB / 0.8633 GB, free: 11.98 MB / 0.6856 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.624e-05/0.4618, allocations: 11.97 kB / 0.8633 GB, free: 11.97 MB / 0.6856 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01235/0.4742, allocations: 5.017 MB / 0.8682 GB, free: 6.816 MB / 0.6856 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.27e-05/0.4742, allocations: 8 kB / 0.8682 GB, free: 6.809 MB / 0.6856 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001758/0.476, allocations: 363.4 kB / 0.8685 GB, free: 6.453 MB / 0.6856 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.003979/0.48, allocations: 0.9945 MB / 0.8695 GB, free: 5.445 MB / 0.6856 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001815/0.4802, allocations: 35.97 kB / 0.8695 GB, free: 5.41 MB / 0.6856 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01062/0.4908, allocations: 8.677 MB / 0.878 GB, free: 12.2 MB / 0.7012 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.21e-05/0.4909, allocations: 4 kB / 0.878 GB, free: 12.19 MB / 0.7012 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.009894/0.5008, allocations: 3.262 MB / 0.8812 GB, free: 8.832 MB / 0.7012 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0007004/0.5016, allocations: 312 kB / 0.8815 GB, free: 8.508 MB / 0.7012 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001336/0.5017, allocations: 20 kB / 0.8815 GB, free: 8.488 MB / 0.7012 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001837/0.5036, allocations: 287.5 kB / 0.8818 GB, free: 8.207 MB / 0.7012 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002731/0.5039, allocations: 95.75 kB / 0.8819 GB, free: 8.113 MB / 0.7012 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.143e-05/0.504, allocations: 35.98 kB / 0.8819 GB, free: 8.078 MB / 0.7012 GB
Notification: Performance of sorting global known variables: time 0.0004497/0.5044, allocations: 370.8 kB / 0.8823 GB, free: 7.719 MB / 0.7012 GB
Notification: Performance of sort global known variables: time 3.61e-07/0.5044, allocations: 4 kB / 0.8823 GB, free: 7.715 MB / 0.7012 GB
Notification: Performance of remove unused functions: time 0.001876/0.5063, allocations: 0.5078 MB / 0.8828 GB, free: 7.207 MB / 0.7012 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 (66):
 * Single equations (assignments): 62
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 4
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 3 systems
   {(2,6,100.0%), (2,6,100.0%), (2,6,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(2,6)}
Notification: Performance of Backend phase and start with SimCode phase: time 0.0002575/0.5066, allocations: 126.2 kB / 0.8829 GB, free: 7.078 MB / 0.7012 GB
Notification: Performance of simCode: created initialization part: time 0.01299/0.5196, allocations: 4.831 MB / 0.8876 GB, free: 2.164 MB / 0.7012 GB
Notification: Performance of simCode: created event and clocks part: time 1.64e-05/0.5197, allocations: 8.062 kB / 0.8876 GB, free: 2.156 MB / 0.7012 GB
Notification: Performance of simCode: created simulation system equations: time 0.00429/0.524, allocations: 1.744 MB / 0.8893 GB, free: 368 kB / 0.7012 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001504/0.5255, allocations: 125.2 kB / 0.8894 GB, free: 248 kB / 0.7012 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0107/0.5362, allocations: 3.591 MB / 0.893 GB, free: 12.55 MB / 0.7169 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000821/0.5371, allocations: 1.036 MB / 0.894 GB, free: 11.49 MB / 0.7169 GB
Notification: Performance of simCode: alias equations: time 0.001987/0.5391, allocations: 498.4 kB / 0.8944 GB, free: 11 MB / 0.7169 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003359/0.5394, allocations: 87.36 kB / 0.8945 GB, free: 10.91 MB / 0.7169 GB
Notification: Performance of SimCode: time 1.212e-06/0.5394, allocations: 0 / 0.8945 GB, free: 10.91 MB / 0.7169 GB
Notification: Performance of Templates: time 0.03419/0.5736, allocations: 20.15 MB / 0.9142 GB, free: 6.812 MB / 0.7325 GB
make -j1 -f Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.makefile
Environment - environmentSimulation:
(rm -f Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.pipe ; mkfifo Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.pipe ; head -c 1048576 < Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.pipe >> ../files/Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.sim & ./Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACTransformer.pipe 2>&1)
Environment - environmentSimulation: