Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr OpenIPSL_dev_OpenIPSL.Tests.Controls.PSSE.ES.EXAC2.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/Modelica 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/OpenIPSL 3.1.0-master/package.mo", uses=false) Using package OpenIPSL with version 3.1.0-dev (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/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 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 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: "" <> buildModelFMU(OpenIPSL.Tests.Controls.PSSE.ES.EXAC2,fileNamePrefix="OpenIPSL_dev_OpenIPSL_Tests_Controls_PSSE_ES_EXAC2",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(OpenIPSL.Tests.Controls.PSSE.ES.EXAC2,fileNamePrefix="OpenIPSL_dev_OpenIPSL_Tests_Controls_PSSE_ES_EXAC2",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009096/0.0009095, allocations: 91.61 kB / 15.06 MB, free: 1.098 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.443/1.443, allocations: 223.3 MB / 239 MB, free: 5.461 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00133/0.00133, allocations: 183.6 kB / 290.3 MB, free: 2.148 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/package.mo): time 0.4961/0.4961, allocations: 79.48 MB / 420.8 MB, free: 3.941 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.000424/0.0004244, allocations: 8 kB / 0.4892 GB, free: 5.469 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4588/0.4593, allocations: 69.51 MB / 0.5571 GB, free: 37.72 MB / 430.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Tests.Controls.PSSE.ES.EXAC2): time 0.008012/0.4673, allocations: 8.477 MB / 0.5654 GB, free: 36.71 MB / 430.1 MB Notification: Performance of NFInst.instExpressions: time 0.006251/0.4736, allocations: 2.886 MB / 0.5682 GB, free: 35.66 MB / 430.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001313/0.475, allocations: 21.72 kB / 0.5682 GB, free: 35.66 MB / 430.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0008889/0.4759, allocations: 250.8 kB / 0.5685 GB, free: 35.55 MB / 430.1 MB Notification: Performance of NFTyping.typeBindings: time 0.002222/0.4781, allocations: 0.8608 MB / 0.5693 GB, free: 34.98 MB / 430.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.002155/0.4803, allocations: 0.8086 MB / 0.5701 GB, free: 34.6 MB / 430.1 MB Notification: Performance of NFFlatten.flatten: time 0.002632/0.4829, allocations: 2.301 MB / 0.5723 GB, free: 33.45 MB / 430.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.000684/0.4836, allocations: 456.2 kB / 0.5728 GB, free: 33.28 MB / 430.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0008036/0.4844, allocations: 0.8359 MB / 0.5736 GB, free: 32.92 MB / 430.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0009899/0.4854, allocations: 1.09 MB / 0.5747 GB, free: 32.45 MB / 430.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0001888/0.4856, allocations: 100.4 kB / 0.5747 GB, free: 32.45 MB / 430.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.000691/0.4863, allocations: 360.5 kB / 0.5751 GB, free: 32.37 MB / 430.1 MB Notification: Performance of NFScalarize.scalarize: time 0.000324/0.4866, allocations: 397.7 kB / 0.5755 GB, free: 32.15 MB / 430.1 MB Notification: Performance of NFVerifyModel.verify: time 0.000276/0.4869, allocations: 341.1 kB / 0.5758 GB, free: 31.94 MB / 430.1 MB Notification: Performance of NFConvertDAE.convert: time 0.001599/0.4885, allocations: 2.08 MB / 0.5778 GB, free: 31.38 MB / 430.1 MB Notification: Performance of FrontEnd - DAE generated: time 6.042e-06/0.4885, allocations: 0 / 0.5778 GB, free: 31.38 MB / 430.1 MB Notification: Performance of FrontEnd: time 2.084e-06/0.4885, allocations: 0 / 0.5778 GB, free: 31.38 MB / 430.1 MB Notification: Performance of Transformations before backend: time 1.926e-05/0.4886, allocations: 0 / 0.5778 GB, free: 31.38 MB / 430.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 295 * Number of variables: 295 Notification: Performance of Generate backend data structure: time 0.01083/0.4994, allocations: 3.663 MB / 0.5814 GB, free: 29.99 MB / 430.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.172e-05/0.4995, allocations: 11.66 kB / 0.5814 GB, free: 29.99 MB / 430.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003322/0.4998, allocations: 186.4 kB / 0.5816 GB, free: 29.87 MB / 430.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004151/0.504, allocations: 0.7916 MB / 0.5824 GB, free: 29.68 MB / 430.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001996/0.506, allocations: 1.226 MB / 0.5836 GB, free: 28.93 MB / 430.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004568/0.5065, allocations: 0.5045 MB / 0.5841 GB, free: 28.46 MB / 430.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000219/0.5067, allocations: 133.8 kB / 0.5842 GB, free: 28.42 MB / 430.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003063/0.5098, allocations: 1.751 MB / 0.5859 GB, free: 27.74 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.447e-05/0.5098, allocations: 6.5 kB / 0.5859 GB, free: 27.74 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001273/0.5099, allocations: 47.09 kB / 0.5859 GB, free: 27.7 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.922e-05/0.51, allocations: 30.59 kB / 0.586 GB, free: 27.7 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00349/0.5135, allocations: 1.648 MB / 0.5876 GB, free: 27.16 MB / 430.1 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 0.009623/0.5231, allocations: 5.861 MB / 0.5933 GB, free: 23.9 MB / 430.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.009699/0.5328, allocations: 3.822 MB / 0.597 GB, free: 22.54 MB / 430.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.002325/0.5351, allocations: 1.105 MB / 0.5981 GB, free: 22.12 MB / 430.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0005391/0.5357, allocations: 0.7343 MB / 0.5988 GB, free: 21.27 MB / 430.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002949/0.5387, allocations: 1.278 MB / 0.6001 GB, free: 20.81 MB / 430.1 MB Notification: Performance of pre-optimization done (n=143): time 1.244e-05/0.5387, allocations: 1.188 kB / 0.6001 GB, free: 20.81 MB / 430.1 MB Notification: Performance of matching and sorting (n=143): time 0.04603/0.5847, allocations: 12.89 MB / 0.6127 GB, free: 18.07 MB / 430.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.835e-05/0.5848, allocations: 152.6 kB / 0.6128 GB, free: 17.91 MB / 430.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003927/0.5888, allocations: 1.602 MB / 0.6144 GB, free: 17.04 MB / 430.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0002991/0.5891, allocations: 62.44 kB / 0.6144 GB, free: 16.98 MB / 430.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0007731/0.5899, allocations: 0.7042 MB / 0.6151 GB, free: 16.35 MB / 430.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0006985/0.5906, allocations: 0.5225 MB / 0.6156 GB, free: 15.88 MB / 430.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003233/0.5909, allocations: 40.19 kB / 0.6157 GB, free: 15.85 MB / 430.1 MB Notification: Performance of setup shared object (initialization): time 0.0001684/0.5911, allocations: 384.5 kB / 0.616 GB, free: 15.49 MB / 430.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.002813/0.5939, allocations: 1.175 MB / 0.6172 GB, free: 14.82 MB / 430.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002584/0.5965, allocations: 1.416 MB / 0.6186 GB, free: 13.33 MB / 430.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.002424/0.599, allocations: 1.26 MB / 0.6198 GB, free: 12.05 MB / 430.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.146e-06/0.599, allocations: 4 kB / 0.6198 GB, free: 12.05 MB / 430.1 MB Notification: Performance of matching and sorting (n=271) (initialization): time 0.009017/0.608, allocations: 4.45 MB / 0.6242 GB, free: 7.539 MB / 430.1 MB Notification: Performance of prepare postOptimizeDAE: time 0.0001082/0.6081, allocations: 209.3 kB / 0.6244 GB, free: 7.27 MB / 430.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.445e-05/0.6082, allocations: 8 kB / 0.6244 GB, free: 7.262 MB / 430.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.008719/0.6169, allocations: 3.175 MB / 0.6275 GB, free: 4.082 MB / 430.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001499/0.6184, allocations: 376.3 kB / 0.6278 GB, free: 3.715 MB / 430.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006174/0.6246, allocations: 3.677 MB / 0.6314 GB, free: 15.99 MB / 446.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002743/0.6273, allocations: 342 kB / 0.6317 GB, free: 15.66 MB / 446.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002373/0.6276, allocations: 67.98 kB / 0.6318 GB, free: 15.59 MB / 446.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.302e-05/0.6276, allocations: 7.984 kB / 0.6318 GB, free: 15.59 MB / 446.1 MB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.009896/0.6375, allocations: 4.235 MB / 0.6359 GB, free: 11.3 MB / 446.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.815e-05/0.6376, allocations: 4 kB / 0.636 GB, free: 11.3 MB / 446.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.009626/0.6472, allocations: 3.173 MB / 0.6391 GB, free: 8.121 MB / 446.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001637/0.6488, allocations: 359.5 kB / 0.6394 GB, free: 7.766 MB / 446.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006986/0.6558, allocations: 3.656 MB / 0.643 GB, free: 4.055 MB / 446.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002655/0.6585, allocations: 314.3 kB / 0.6433 GB, free: 3.746 MB / 446.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002924/0.6588, allocations: 67.98 kB / 0.6433 GB, free: 3.68 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: 3 ($whenCondition1,$whenCondition2,eXAC2.rotatingExciterWithDemagnetizationLimited.sISO.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (206): * Single equations (assignments): 204 * 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: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 2 {30 26,1 10} Notification: Performance of prepare postOptimizeDAE: time 0.001211/0.66, allocations: 424.7 kB / 0.6437 GB, free: 3.254 MB / 446.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0007654/0.6608, allocations: 185.7 kB / 0.6439 GB, free: 3.07 MB / 446.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01692/0.6777, allocations: 6.062 MB / 0.6498 GB, free: 12.99 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.87e-05/0.6778, allocations: 16.56 kB / 0.6498 GB, free: 12.98 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.505e-05/0.6778, allocations: 0 / 0.6498 GB, free: 12.98 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.821e-05/0.6779, allocations: 7.969 kB / 0.6499 GB, free: 12.97 MB / 462.1 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 0.02219/0.7001, allocations: 8.404 MB / 0.6581 GB, free: 4.43 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.012e-05/0.7002, allocations: 0.9375 kB / 0.6581 GB, free: 4.43 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001211/0.7014, allocations: 187.8 kB / 0.6582 GB, free: 4.246 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.007375/0.7088, allocations: 2.514 MB / 0.6607 GB, free: 1.727 MB / 462.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003277/0.7091, allocations: 35.94 kB / 0.6607 GB, free: 1.691 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.02558/0.7347, allocations: 10.31 MB / 0.6708 GB, free: 7.242 MB / 478.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.422e-06/0.7348, allocations: 1.062 kB / 0.6708 GB, free: 7.242 MB / 478.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02079/0.7556, allocations: 7.431 MB / 0.6781 GB, free: 15.78 MB / 494.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.001111/0.7567, allocations: 304.5 kB / 0.6783 GB, free: 15.46 MB / 494.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0007787/0.7575, allocations: 31.98 kB / 0.6784 GB, free: 15.43 MB / 494.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002204/0.7598, allocations: 199.8 kB / 0.6786 GB, free: 15.24 MB / 494.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001073/0.7609, allocations: 285.2 kB / 0.6788 GB, free: 14.96 MB / 494.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002413/0.7611, allocations: 43.98 kB / 0.6789 GB, free: 14.92 MB / 494.1 MB Notification: Performance of sorting global known variables: time 0.002316/0.7635, allocations: 1.062 MB / 0.6799 GB, free: 13.86 MB / 494.1 MB Notification: Performance of sort global known variables: time 1.583e-06/0.7635, allocations: 0 / 0.6799 GB, free: 13.86 MB / 494.1 MB Notification: Performance of remove unused functions: time 0.00409/0.7676, allocations: 0.9673 MB / 0.6809 GB, free: 12.89 MB / 494.1 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,eXAC2.imLimitedSimpleLag.state,eXAC2.imDerivativeLag.x,eXAC2.leadLag.TF.x_scaled[1],eXAC2.rotatingExciterWithDemagnetizationLimited.sISO.y,eXAC2.TransducerDelay.state) * Number of discrete variables: 2 ($whenCondition1,$whenCondition2) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (100): * Single equations (assignments): 99 * 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 0.02021/0.7878, allocations: 8.044 MB / 0.6887 GB, free: 4.805 MB / 494.1 MB Notification: Performance of simCode: created initialization part: time 0.01732/0.8052, allocations: 5.947 MB / 0.6945 GB, free: 14.85 MB / 0.4981 GB Notification: Performance of simCode: created event and clocks part: time 7.835e-06/0.8052, allocations: 0 / 0.6945 GB, free: 14.85 MB / 0.4981 GB Notification: Performance of simCode: created simulation system equations: time 0.006466/0.8117, allocations: 2.302 MB / 0.6968 GB, free: 12.54 MB / 0.4981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002392/0.8141, allocations: 164.2 kB / 0.6969 GB, free: 12.38 MB / 0.4981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03241/0.8465, allocations: 16.07 MB / 0.7126 GB, free: 11.48 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009153/0.8475, allocations: 1.32 MB / 0.7139 GB, free: 10.13 MB / 0.5137 GB Notification: Performance of simCode: alias equations: time 0.001004/0.8485, allocations: 213.9 kB / 0.7141 GB, free: 9.922 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0009758/0.8495, allocations: 0.7062 MB / 0.7148 GB, free: 9.219 MB / 0.5137 GB Notification: Performance of SimCode: time 1.442e-06/0.8495, allocations: 0 / 0.7148 GB, free: 9.219 MB / 0.5137 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.07678/0.9263, allocations: 51.07 MB / 0.7647 GB, free: 6.434 MB / 0.5606 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001571/0.9265, allocations: 209.5 kB / 0.7649 GB, free: 6.184 MB / 0.5606 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.452/4.378, allocations: 4.062 kB / 0.7649 GB, free: 6.18 MB / 0.5606 GB (rm -f OpenIPSL_dev_OpenIPSL.Tests.Controls.PSSE.ES.EXAC2.pipe ; mkfifo OpenIPSL_dev_OpenIPSL.Tests.Controls.PSSE.ES.EXAC2.pipe ; head -c 1048576 < OpenIPSL_dev_OpenIPSL.Tests.Controls.PSSE.ES.EXAC2.pipe >> ../files/OpenIPSL_dev_OpenIPSL.Tests.Controls.PSSE.ES.EXAC2.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_OpenIPSL_dev_OpenIPSL_Tests_Controls_PSSE_ES_EXAC2_fmu --startTime=0 --stopTime=10 --timeout=50 --tolerance=1e-06 OpenIPSL_dev_OpenIPSL_Tests_Controls_PSSE_ES_EXAC2.fmu > OpenIPSL_dev_OpenIPSL.Tests.Controls.PSSE.ES.EXAC2.pipe 2>&1) Environment - environmentSimulation: