Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.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 7.0.3-maint.7.0.x/package.mo", uses=false)
Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.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.FixedResistances.BaseClasses.Validation.PlugFlowCore,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore")
translateModel(Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore")
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: 84.38 kB / 15.06 MB, free: 1.09 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001218/0.001218, allocations: 168.7 kB / 15.95 MB, free: 204 kB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.667/1.667, allocations: 205.4 MB / 222.1 MB, free: 5.641 MB / 174.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.636/1.636, allocations: 252 MB / 0.5102 GB, free: 4.836 MB / 414.1 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 0.0005876/0.0005877, allocations: 12 kB / 0.6243 GB, free: 1.078 MB / 0.5137 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.5506/0.5512, allocations: 106.3 MB / 0.7281 GB, free: 11.38 MB / 0.545 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore): time 0.03016/0.5814, allocations: 30.83 MB / 0.7582 GB, free: 12.45 MB / 0.5762 GB
Notification: Performance of NFInst.instExpressions: time 0.0128/0.5943, allocations: 9.086 MB / 0.7671 GB, free: 3.344 MB / 0.5762 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.00134/0.5957, allocations: 23.81 kB / 0.7671 GB, free: 3.32 MB / 0.5762 GB
Notification: Performance of NFTyping.typeComponents: time 0.001209/0.5969, allocations: 274.2 kB / 0.7674 GB, free: 3.051 MB / 0.5762 GB
Notification: Performance of NFTyping.typeBindings: time 0.003712/0.6006, allocations: 1.135 MB / 0.7685 GB, free: 1.91 MB / 0.5762 GB
Notification: Performance of NFTyping.typeClassSections: time 0.002612/0.6032, allocations: 0.7093 MB / 0.7692 GB, free: 1.203 MB / 0.5762 GB
Notification: Performance of NFFlatten.flatten: time 0.003613/0.6069, allocations: 2.294 MB / 0.7714 GB, free: 14.9 MB / 0.5919 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0009251/0.6078, allocations: 490.5 kB / 0.7719 GB, free: 14.41 MB / 0.5919 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.001818/0.6096, allocations: 0.7777 MB / 0.7727 GB, free: 13.62 MB / 0.5919 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0009591/0.6106, allocations: 0.5679 MB / 0.7732 GB, free: 13.05 MB / 0.5919 GB
Notification: Performance of NFPackage.collectConstants: time 8.51e-05/0.6107, allocations: 39.98 kB / 0.7733 GB, free: 13.02 MB / 0.5919 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.002416/0.6131, allocations: 1.013 MB / 0.7743 GB, free: 12 MB / 0.5919 GB
Notification: Performance of NFScalarize.scalarize: time 0.0001788/0.6133, allocations: 127.4 kB / 0.7744 GB, free: 11.88 MB / 0.5919 GB
Notification: Performance of NFVerifyModel.verify: time 0.0003166/0.6137, allocations: 181.3 kB / 0.7745 GB, free: 11.69 MB / 0.5919 GB
Notification: Performance of NFConvertDAE.convert: time 0.00179/0.6155, allocations: 1.107 MB / 0.7756 GB, free: 10.58 MB / 0.5919 GB
Notification: Performance of FrontEnd - DAE generated: time 5.4e-06/0.6155, allocations: 0 / 0.7756 GB, free: 10.58 MB / 0.5919 GB
Notification: Performance of FrontEnd: time 1.242e-06/0.6155, allocations: 4 kB / 0.7756 GB, free: 10.58 MB / 0.5919 GB
Notification: Performance of Transformations before backend: time 1.004e-05/0.6155, allocations: 0 / 0.7756 GB, free: 10.58 MB / 0.5919 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 111
 * Number of variables: 111
Notification: Performance of Generate backend data structure: time 0.002099/0.6176, allocations: 1.106 MB / 0.7767 GB, free: 9.422 MB / 0.5919 GB
Notification: Performance of prepare preOptimizeDAE: time 3.919e-05/0.6177, allocations: 8.031 kB / 0.7767 GB, free: 9.414 MB / 0.5919 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001462/0.6178, allocations: 86.97 kB / 0.7768 GB, free: 9.328 MB / 0.5919 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001029/0.6188, allocations: 0.6174 MB / 0.7774 GB, free: 8.668 MB / 0.5919 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.29e-05/0.6189, allocations: 37 kB / 0.7774 GB, free: 8.633 MB / 0.5919 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 8.941e-05/0.619, allocations: 48 kB / 0.7775 GB, free: 8.586 MB / 0.5919 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007927/0.6198, allocations: 442.3 kB / 0.7779 GB, free: 8.148 MB / 0.5919 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.738e-05/0.6198, allocations: 0 / 0.7779 GB, free: 8.148 MB / 0.5919 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.338e-05/0.6199, allocations: 19.95 kB / 0.7779 GB, free: 8.129 MB / 0.5919 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.161e-05/0.6199, allocations: 15.92 kB / 0.7779 GB, free: 8.113 MB / 0.5919 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006747/0.6206, allocations: 379.8 kB / 0.7783 GB, free: 7.738 MB / 0.5919 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 0.003732/0.6243, allocations: 2.779 MB / 0.781 GB, free: 4.676 MB / 0.5919 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0007813/0.6251, allocations: 383.6 kB / 0.7814 GB, free: 4.293 MB / 0.5919 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0002844/0.6254, allocations: 165 kB / 0.7815 GB, free: 4.129 MB / 0.5919 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.001255/0.6267, allocations: 1.436 MB / 0.7829 GB, free: 2.379 MB / 0.5919 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.732e-05/0.6267, allocations: 34.84 kB / 0.783 GB, free: 2.336 MB / 0.5919 GB
Notification: Performance of pre-optimization done (n=35): time 3.126e-06/0.6267, allocations: 0 / 0.783 GB, free: 2.336 MB / 0.5919 GB
Notification: Performance of matching and sorting (n=35): time 0.001103/0.6278, allocations: 0.4973 MB / 0.7835 GB, free: 1.832 MB / 0.5919 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.272e-05/0.6279, allocations: 59.34 kB / 0.7835 GB, free: 1.762 MB / 0.5919 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009783/0.6289, allocations: 0.7313 MB / 0.7842 GB, free: 1.016 MB / 0.5919 GB
Notification: Performance of collectPreVariables (initialization): time 3.742e-05/0.6289, allocations: 29.7 kB / 0.7843 GB, free: 0.9805 MB / 0.5919 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0002712/0.6292, allocations: 340.2 kB / 0.7846 GB, free: 0.6445 MB / 0.5919 GB
Notification: Performance of collectInitialBindings (initialization): time 0.000109/0.6293, allocations: 126.2 kB / 0.7847 GB, free: 0.5195 MB / 0.5919 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 2.286e-05/0.6293, allocations: 8 kB / 0.7847 GB, free: 0.5117 MB / 0.5919 GB
Notification: Performance of setup shared object (initialization): time 0.0001199/0.6295, allocations: 321.9 kB / 0.785 GB, free: 196 kB / 0.5919 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002699/0.6297, allocations: 132.7 kB / 0.7851 GB, free: 64 kB / 0.5919 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003743/0.6301, allocations: 201.7 kB / 0.7853 GB, free: 15.84 MB / 0.6075 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.000317/0.6305, allocations: 156.3 kB / 0.7855 GB, free: 15.69 MB / 0.6075 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.905e-06/0.6305, allocations: 3.938 kB / 0.7855 GB, free: 15.68 MB / 0.6075 GB
Notification: Performance of matching and sorting (n=48) (initialization): time 0.0008545/0.6313, allocations: 473.8 kB / 0.7859 GB, free: 15.21 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 8.077e-05/0.6314, allocations: 133.9 kB / 0.7861 GB, free: 15.06 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.948e-05/0.6314, allocations: 4 kB / 0.7861 GB, free: 15.06 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.594e-05/0.6315, allocations: 4.047 kB / 0.7861 GB, free: 15.05 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004752/0.6319, allocations: 107.8 kB / 0.7862 GB, free: 14.95 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0003681/0.6323, allocations: 0.5937 MB / 0.7868 GB, free: 14.33 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004742/0.6328, allocations: 71.62 kB / 0.7868 GB, free: 14.26 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.401e-05/0.6329, allocations: 19.98 kB / 0.7869 GB, free: 14.24 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 7.324e-06/0.6329, allocations: 7.938 kB / 0.7869 GB, free: 14.23 MB / 0.6075 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.0007365/0.6336, allocations: 375.8 kB / 0.7872 GB, free: 13.87 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.07e-05/0.6337, allocations: 0 / 0.7872 GB, free: 13.87 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 5.881e-06/0.6337, allocations: 4 kB / 0.7872 GB, free: 13.86 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003466/0.634, allocations: 91.88 kB / 0.7873 GB, free: 13.77 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.039e-06/0.634, allocations: 4 kB / 0.7873 GB, free: 13.77 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004134/0.6345, allocations: 71.56 kB / 0.7874 GB, free: 13.7 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.016e-05/0.6345, allocations: 23.98 kB / 0.7874 GB, free: 13.68 MB / 0.6075 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 6
 * 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 (46):
 * Single equations (assignments): 43
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 2
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 1
 * Torn equation systems: 0
 * 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: Performance of prepare postOptimizeDAE: time 0.0003143/0.6348, allocations: 272.7 kB / 0.7877 GB, free: 13.4 MB / 0.6075 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001034/0.635, allocations: 79.06 kB / 0.7877 GB, free: 13.32 MB / 0.6075 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001477/0.6364, allocations: 0.8177 MB / 0.7885 GB, free: 12.52 MB / 0.6075 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.755e-05/0.6365, allocations: 8 kB / 0.7885 GB, free: 12.52 MB / 0.6075 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 6.872e-06/0.6365, allocations: 0 / 0.7885 GB, free: 12.52 MB / 0.6075 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.046e-05/0.6365, allocations: 7.922 kB / 0.7886 GB, free: 12.51 MB / 0.6075 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002162/0.6387, allocations: 1.462 MB / 0.79 GB, free: 10.98 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.385e-05/0.6387, allocations: 4 kB / 0.79 GB, free: 10.98 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003596/0.6391, allocations: 83.89 kB / 0.7901 GB, free: 10.9 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (simulation): time 9.378e-06/0.6391, allocations: 0 / 0.7901 GB, free: 10.9 MB / 0.6075 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.753e-05/0.6391, allocations: 20.08 kB / 0.7901 GB, free: 10.88 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0003307/0.6395, allocations: 0.5975 MB / 0.7907 GB, free: 10.26 MB / 0.6075 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.703e-06/0.6395, allocations: 0 / 0.7907 GB, free: 10.26 MB / 0.6075 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001436/0.6409, allocations: 0.9965 MB / 0.7916 GB, free: 9.238 MB / 0.6075 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0003444/0.6413, allocations: 243.8 kB / 0.7919 GB, free: 8.98 MB / 0.6075 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001022/0.6414, allocations: 19.95 kB / 0.7919 GB, free: 8.961 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003692/0.6418, allocations: 31.89 kB / 0.7919 GB, free: 8.93 MB / 0.6075 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001269/0.6419, allocations: 44.38 kB / 0.792 GB, free: 8.887 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.381e-05/0.642, allocations: 23.92 kB / 0.792 GB, free: 8.863 MB / 0.6075 GB
Notification: Performance of sorting global known variables: time 0.0007491/0.6427, allocations: 0.5185 MB / 0.7925 GB, free: 8.348 MB / 0.6075 GB
Notification: Performance of sort global known variables: time 1.81e-07/0.6427, allocations: 0 / 0.7925 GB, free: 8.348 MB / 0.6075 GB
Notification: Performance of remove unused functions: time 0.001231/0.644, allocations: 451.5 kB / 0.7929 GB, free: 7.906 MB / 0.6075 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 4
 * Number of states: 4 (pip.del.x,pip.timDel.x,senTemOut.T,senTemIn.T)
 * 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 (52):
 * Single equations (assignments): 37
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 14
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 1
 * Torn equation systems: 0
 * 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: Performance of Backend phase and start with SimCode phase: time 0.0008826/0.6448, allocations: 447.9 kB / 0.7934 GB, free: 7.469 MB / 0.6075 GB
Notification: Performance of simCode: created initialization part: time 0.001553/0.6464, allocations: 0.7452 MB / 0.7941 GB, free: 6.699 MB / 0.6075 GB
Notification: Performance of simCode: created event and clocks part: time 6.261e-06/0.6464, allocations: 0 / 0.7941 GB, free: 6.699 MB / 0.6075 GB
Notification: Performance of simCode: created simulation system equations: time 0.0005435/0.647, allocations: 349.8 kB / 0.7944 GB, free: 6.344 MB / 0.6075 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001841/0.6488, allocations: 386.2 kB / 0.7948 GB, free: 5.977 MB / 0.6075 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002556/0.6514, allocations: 1.779 MB / 0.7965 GB, free: 4.156 MB / 0.6075 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004942/0.6519, allocations: 0.9353 MB / 0.7974 GB, free: 3.191 MB / 0.6075 GB
Notification: Performance of simCode: alias equations: time 0.0007418/0.6527, allocations: 217 kB / 0.7976 GB, free: 2.992 MB / 0.6075 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001728/0.6528, allocations: 75.41 kB / 0.7977 GB, free: 2.918 MB / 0.6075 GB
Notification: Performance of SimCode: time 1.022e-06/0.6529, allocations: 0 / 0.7977 GB, free: 2.918 MB / 0.6075 GB
Notification: Performance of Templates: time 0.03111/0.684, allocations: 18.4 MB / 0.8157 GB, free: 0.7969 MB / 0.6231 GB
make -j1 -f Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.makefile
Environment - environmentSimulation:
(rm -f Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.sim & ./Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe 2>&1)
Environment - environmentSimulation: