Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.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.Fluid.Movers.Validation.PowerSimplified,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified")
translateModel(Buildings.Fluid.Movers.Validation.PowerSimplified,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.000988/0.0009881, allocations: 99.31 kB / 15.05 MB, free: 1.105 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001094/0.001094, allocations: 177.3 kB / 15.94 MB, free: 220 kB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.35/1.35, allocations: 205.4 MB / 222.1 MB, free: 5.676 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 1.568/1.568, allocations: 292.5 MB / 0.5497 GB, free: 14.63 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 0.0005334/0.0005336, allocations: 15.38 kB / 0.6735 GB, free: 26.16 MB / 0.5294 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2147/0.2152, allocations: 116.3 MB / 0.7871 GB, free: 11.99 MB / 0.6075 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Movers.Validation.PowerSimplified): time 0.05664/0.2719, allocations: 62.56 MB / 0.8482 GB, free: 13.27 MB / 0.67 GB
Notification: Performance of NFInst.instExpressions: time 0.03478/0.3067, allocations: 23.34 MB / 0.871 GB, free: 5.891 MB / 0.6856 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.00386/0.3107, allocations: 95.31 kB / 0.8711 GB, free: 5.797 MB / 0.6856 GB
Notification: Performance of NFTyping.typeComponents: time 0.005214/0.3159, allocations: 1.435 MB / 0.8725 GB, free: 4.355 MB / 0.6856 GB
Notification: Performance of NFTyping.typeBindings: time 0.01163/0.3275, allocations: 3.479 MB / 0.8759 GB, free: 0.8711 MB / 0.6856 GB
Notification: Performance of NFTyping.typeClassSections: time 0.01204/0.3396, allocations: 4.099 MB / 0.8799 GB, free: 12.82 MB / 0.7012 GB
Notification: Performance of NFFlatten.flatten: time 0.01025/0.3499, allocations: 4.859 MB / 0.8846 GB, free: 7.953 MB / 0.7012 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.003602/0.3535, allocations: 2.145 MB / 0.8867 GB, free: 5.766 MB / 0.7012 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.00451/0.358, allocations: 2.211 MB / 0.8889 GB, free: 3.547 MB / 0.7012 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.002665/0.3607, allocations: 1.532 MB / 0.8904 GB, free: 2.008 MB / 0.7012 GB
Notification: Performance of NFPackage.collectConstants: time 0.0003655/0.3611, allocations: 120 kB / 0.8905 GB, free: 1.891 MB / 0.7012 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.003451/0.3646, allocations: 1.365 MB / 0.8918 GB, free: 0.5234 MB / 0.7012 GB
Notification: Performance of NFScalarize.scalarize: time 0.000887/0.3655, allocations: 0.919 MB / 0.8927 GB, free: 15.6 MB / 0.7169 GB
Notification: Performance of NFVerifyModel.verify: time 0.0009912/0.3665, allocations: 0.7614 MB / 0.8935 GB, free: 14.83 MB / 0.7169 GB
Notification: Performance of NFConvertDAE.convert: time 0.004743/0.3712, allocations: 4.379 MB / 0.8977 GB, free: 10.44 MB / 0.7169 GB
Notification: Performance of FrontEnd - DAE generated: time 3.877e-06/0.3712, allocations: 4 kB / 0.8977 GB, free: 10.44 MB / 0.7169 GB
Notification: Performance of FrontEnd: time 2.064e-06/0.3712, allocations: 0 / 0.8977 GB, free: 10.44 MB / 0.7169 GB
Notification: Performance of Transformations before backend: time 9.263e-05/0.3713, allocations: 0 / 0.8977 GB, free: 10.44 MB / 0.7169 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 440
 * Number of variables: 440
Notification: Performance of Generate backend data structure: time 0.00672/0.3781, allocations: 3.78 MB / 0.9014 GB, free: 6.59 MB / 0.7169 GB
Notification: Performance of prepare preOptimizeDAE: time 3.548e-05/0.3781, allocations: 16.03 kB / 0.9015 GB, free: 6.574 MB / 0.7169 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002944/0.3811, allocations: 0.6588 MB / 0.9021 GB, free: 5.91 MB / 0.7169 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.008391/0.3895, allocations: 4.268 MB / 0.9063 GB, free: 1.586 MB / 0.7169 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001356/0.3896, allocations: 152 kB / 0.9064 GB, free: 1.438 MB / 0.7169 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003212/0.39, allocations: 191.9 kB / 0.9066 GB, free: 1.25 MB / 0.7169 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.4477/0.8377, allocations: 2.155 MB / 0.9087 GB, free: 104.1 MB / 0.7169 GB
Notification: Performance of preOpt findStateOrder (simulation): time 4.432e-05/0.8378, allocations: 6.531 kB / 0.9087 GB, free: 104.1 MB / 0.7169 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000175/0.838, allocations: 73.28 kB / 0.9088 GB, free: 104.1 MB / 0.7169 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.642e-05/0.838, allocations: 46.84 kB / 0.9088 GB, free: 104.1 MB / 0.7169 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00394/0.842, allocations: 1.622 MB / 0.9104 GB, free: 104.1 MB / 0.7169 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 0.01339/0.8554, allocations: 9.845 MB / 0.92 GB, free: 100.1 MB / 0.7169 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.002889/0.8583, allocations: 1.237 MB / 0.9212 GB, free: 100.1 MB / 0.7169 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 evalFunc (simulation): time 0.005193/0.8635, allocations: 3.484 MB / 0.9246 GB, free: 98.41 MB / 0.7169 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.304e-05/0.8635, allocations: 42.06 kB / 0.9247 GB, free: 98.37 MB / 0.7169 GB
Notification: Performance of preOpt simplifyInStream (simulation): time 0.0009896/0.8645, allocations: 209.4 kB / 0.9249 GB, free: 98.33 MB / 0.7169 GB
Notification: Performance of pre-optimization done (n=85): time 3.196e-06/0.8646, allocations: 0 / 0.9249 GB, free: 98.33 MB / 0.7169 GB
Notification: Performance of matching and sorting (n=91): time 0.009168/0.8737, allocations: 3.971 MB / 0.9287 GB, free: 96.86 MB / 0.7169 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.478e-05/0.8738, allocations: 67.17 kB / 0.9288 GB, free: 96.79 MB / 0.7169 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.006607/0.8804, allocations: 3.976 MB / 0.9327 GB, free: 95.35 MB / 0.7169 GB
Notification: Performance of collectPreVariables (initialization): time 0.0002356/0.8807, allocations: 54.42 kB / 0.9327 GB, free: 95.3 MB / 0.7169 GB
Notification: Performance of collectInitialEqns (initialization): time 0.001315/0.882, allocations: 1.598 MB / 0.9343 GB, free: 94.05 MB / 0.7169 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0003484/0.8823, allocations: 318.4 kB / 0.9346 GB, free: 93.81 MB / 0.7169 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 7.927e-05/0.8824, allocations: 26.88 kB / 0.9346 GB, free: 93.79 MB / 0.7169 GB
Notification: Performance of setup shared object (initialization): time 0.0001066/0.8825, allocations: 363.1 kB / 0.935 GB, free: 93.46 MB / 0.7169 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.001375/0.8839, allocations: 0.6318 MB / 0.9356 GB, free: 93.27 MB / 0.7169 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.001632/0.8856, allocations: 1.306 MB / 0.9369 GB, free: 92.23 MB / 0.7169 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001512/0.8871, allocations: 0.7875 MB / 0.9376 GB, free: 91.96 MB / 0.7169 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.119e-05/0.8871, allocations: 8.344 kB / 0.9376 GB, free: 91.96 MB / 0.7169 GB
Notification: Performance of matching and sorting (n=193) (initialization): time 0.004505/0.8916, allocations: 2.308 MB / 0.9399 GB, free: 91.19 MB / 0.7169 GB
Notification: Performance of prepare postOptimizeDAE: time 0.001367/0.893, allocations: 7.993 MB / 0.9477 GB, free: 82.7 MB / 0.7169 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.448e-05/0.893, allocations: 18.84 kB / 0.9477 GB, free: 82.7 MB / 0.7169 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0007054/0.8938, allocations: 256.9 kB / 0.948 GB, free: 82.62 MB / 0.7169 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001538/0.8953, allocations: 393 kB / 0.9483 GB, free: 82.6 MB / 0.7169 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003631/0.8989, allocations: 5.831 MB / 0.954 GB, free: 77.27 MB / 0.7169 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003553/0.9025, allocations: 164.9 kB / 0.9542 GB, free: 77.23 MB / 0.7169 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003234/0.9029, allocations: 113.7 kB / 0.9543 GB, free: 77.21 MB / 0.7169 GB
Notification: Performance of prepare postOptimizeDAE: time 1.642e-05/0.9029, allocations: 3.281 kB / 0.9543 GB, free: 77.21 MB / 0.7169 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.003803/0.9067, allocations: 2.081 MB / 0.9563 GB, free: 76.53 MB / 0.7169 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.765e-05/0.9067, allocations: 25.78 kB / 0.9564 GB, free: 76.53 MB / 0.7169 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.001235/0.908, allocations: 474.1 kB / 0.9568 GB, free: 76.37 MB / 0.7169 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001105/0.9091, allocations: 324.8 kB / 0.9571 GB, free: 76.32 MB / 0.7169 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.008763/0.9179, allocations: 9.023 MB / 0.9659 GB, free: 68.78 MB / 0.7169 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003027/0.9209, allocations: 140.9 kB / 0.9661 GB, free: 68.71 MB / 0.7169 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002311/0.9212, allocations: 100.8 kB / 0.9662 GB, free: 68.7 MB / 0.7169 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 81
 * 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 (172):
 * Single equations (assignments): 164
 * Array equations: 3
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 1
 * Torn equation systems: 4
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 1 {1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 4 {1 2,1 2,1 2,1 4}
Notification: Performance of prepare postOptimizeDAE: time 0.001692/0.9229, allocations: 0.913 MB / 0.9671 GB, free: 68.08 MB / 0.7169 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006158/0.9235, allocations: 321.5 kB / 0.9674 GB, free: 67.91 MB / 0.7169 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003831/0.9273, allocations: 1.955 MB / 0.9693 GB, free: 66.89 MB / 0.7169 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.597e-05/0.9274, allocations: 15.84 kB / 0.9693 GB, free: 66.88 MB / 0.7169 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 3.667e-06/0.9274, allocations: 3.953 kB / 0.9693 GB, free: 66.88 MB / 0.7169 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002573/0.93, allocations: 1.655 MB / 0.9709 GB, free: 65.83 MB / 0.7169 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.007381/0.9374, allocations: 4.258 MB / 0.9751 GB, free: 63.09 MB / 0.7169 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.213e-06/0.9374, allocations: 11.84 kB / 0.9751 GB, free: 63.08 MB / 0.7169 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001022/0.9384, allocations: 242.8 kB / 0.9753 GB, free: 63.01 MB / 0.7169 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0003202/0.9388, allocations: 145.2 kB / 0.9755 GB, free: 62.95 MB / 0.7169 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.775e-05/0.9388, allocations: 35.84 kB / 0.9755 GB, free: 62.92 MB / 0.7169 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0006316/0.9395, allocations: 1.354 MB / 0.9768 GB, free: 61.66 MB / 0.7169 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.984e-06/0.9395, allocations: 0 / 0.9768 GB, free: 61.66 MB / 0.7169 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004732/0.9442, allocations: 2.698 MB / 0.9794 GB, free: 60.14 MB / 0.7169 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.00137/0.9456, allocations: 0.5856 MB / 0.98 GB, free: 59.66 MB / 0.7169 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0004299/0.9461, allocations: 27.44 kB / 0.98 GB, free: 59.64 MB / 0.7169 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001528/0.9476, allocations: 145.8 kB / 0.9802 GB, free: 59.58 MB / 0.7169 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001116/0.9477, allocations: 71.86 kB / 0.9802 GB, free: 59.54 MB / 0.7169 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.402e-05/0.9478, allocations: 61.81 kB / 0.9803 GB, free: 59.52 MB / 0.7169 GB
Notification: Performance of sorting global known variables: time 0.003271/0.9511, allocations: 2.789 MB / 0.983 GB, free: 57.81 MB / 0.7169 GB
Notification: Performance of sort global known variables: time 2.5e-07/0.9511, allocations: 0 / 0.983 GB, free: 57.81 MB / 0.7169 GB
Notification: Performance of remove unused functions: time 0.00422/0.9553, allocations: 1.437 MB / 0.9844 GB, free: 56.43 MB / 0.7169 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 5
 * Number of states: 3 (pump_Nrpm.vol.dynBal.U,pump_dp.vol.dynBal.U,pump_m_flow.vol.dynBal.U)
 * 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 (104):
 * Single equations (assignments): 94
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 8
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 1
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 1 {1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {1 5}
Notification: Performance of Backend phase and start with SimCode phase: time 0.001274/0.9566, allocations: 0.7207 MB / 0.9851 GB, free: 55.82 MB / 0.7169 GB
Notification: Performance of simCode: created initialization part: time 0.005273/0.9619, allocations: 3.421 MB / 0.9885 GB, free: 52.32 MB / 0.7169 GB
Notification: Performance of simCode: created event and clocks part: time 6.022e-06/0.9619, allocations: 0 / 0.9885 GB, free: 52.32 MB / 0.7169 GB
Notification: Performance of simCode: created simulation system equations: time 0.001329/0.9633, allocations: 0.7012 MB / 0.9892 GB, free: 51.62 MB / 0.7169 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006429/0.9697, allocations: 1.719 MB / 0.9908 GB, free: 49.92 MB / 0.7169 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008233/0.978, allocations: 6.599 MB / 0.9973 GB, free: 43.29 MB / 0.7169 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001369/0.9794, allocations: 2.239 MB / 0.9995 GB, free: 41.02 MB / 0.7169 GB
Notification: Performance of simCode: alias equations: time 0.003481/0.9829, allocations: 0.8044 MB / 1 GB, free: 40.21 MB / 0.7169 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006158/0.9835, allocations: 275.2 kB / 1.001 GB, free: 39.95 MB / 0.7169 GB
Notification: Performance of SimCode: time 1.352e-06/0.9835, allocations: 0 / 1.001 GB, free: 39.95 MB / 0.7169 GB
Notification: Performance of Templates: time 0.1034/1.087, allocations: 72.16 MB / 1.071 GB, free: 0.7031 MB / 0.7481 GB
make -j1 -f Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.makefile
Environment - environmentSimulation:
(rm -f Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.pipe ; mkfifo Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.pipe >> ../files/Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.sim & ./Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.Movers.Validation.PowerSimplified.pipe 2>&1)
Environment - environmentSimulation: