Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.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/ModelicaTest 3.2.1+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+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 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(ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve") translateModel(ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008138/0.0008185, allocations: 98.11 kB / 15.36 MB, free: 0.7344 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.005539/0.005539, allocations: 169.6 kB / 16.27 MB, free: 6.652 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.424/1.424, allocations: 205.4 MB / 222.4 MB, free: 5.562 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo): time 0.2916/0.2916, allocations: 38.02 MB / 308.8 MB, free: 10.38 MB / 254.1 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: ModelicaTest requested package Modelica of version 3.2.1. Modelica 3.2.3 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.0005553/0.0005553, allocations: 12 kB / 377 MB, free: 14.85 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1082/0.1087, allocations: 57.52 MB / 434.6 MB, free: 5.223 MB / 366.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve): time 0.248/0.3568, allocations: 42.1 MB / 476.7 MB, free: 30.54 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.0218/0.3786, allocations: 21.03 MB / 497.7 MB, free: 17.85 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001053/0.3797, allocations: 28.38 kB / 497.7 MB, free: 17.84 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001161/0.3809, allocations: 386.6 kB / 498.1 MB, free: 17.62 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.01207/0.393, allocations: 4.202 MB / 0.4905 GB, free: 15.69 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.006329/0.3993, allocations: 2.073 MB / 0.4926 GB, free: 14.57 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.002247/0.4016, allocations: 2.134 MB / 0.4946 GB, free: 13.76 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0008958/0.4025, allocations: 402.4 kB / 0.495 GB, free: 13.61 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.001606/0.4041, allocations: 0.6646 MB / 0.4957 GB, free: 13.32 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.00679/0.4109, allocations: 3.728 MB / 0.4993 GB, free: 11.65 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002163/0.4112, allocations: 32.34 kB / 0.4993 GB, free: 11.65 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.01603/0.4272, allocations: 7.701 MB / 0.5069 GB, free: 9.648 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0005237/0.4278, allocations: 163.7 kB / 0.507 GB, free: 9.57 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0009949/0.4288, allocations: 411.9 kB / 0.5074 GB, free: 9.34 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01598/0.4448, allocations: 5.254 MB / 0.5125 GB, free: 6.953 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.14e-06/0.4448, allocations: 1.25 kB / 0.5125 GB, free: 6.953 MB / 382.1 MB Notification: Performance of FrontEnd: time 2.204e-06/0.4448, allocations: 0 / 0.5125 GB, free: 6.953 MB / 382.1 MB Notification: Performance of Transformations before backend: time 3.485e-05/0.4449, allocations: 0 / 0.5125 GB, free: 6.953 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: 142 * Number of variables: 142 Notification: Performance of Generate backend data structure: time 0.005496/0.4504, allocations: 1.539 MB / 0.514 GB, free: 5.852 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.435e-05/0.4504, allocations: 13.56 kB / 0.5141 GB, free: 5.848 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002418/0.4529, allocations: 312.5 kB / 0.5144 GB, free: 5.723 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009787/0.4539, allocations: 0.5349 MB / 0.5149 GB, free: 5.25 MB / 382.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.915e-05/0.4539, allocations: 51.03 kB / 0.5149 GB, free: 5.227 MB / 382.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001285/0.4541, allocations: 57.34 kB / 0.515 GB, free: 5.207 MB / 382.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002457/0.4565, allocations: 1.004 MB / 0.516 GB, free: 4.574 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.386e-05/0.4566, allocations: 0.9062 kB / 0.516 GB, free: 4.574 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.823e-05/0.4567, allocations: 27.25 kB / 0.516 GB, free: 4.555 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.999e-05/0.4567, allocations: 21.16 kB / 0.516 GB, free: 4.555 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002552/0.4593, allocations: 0.9228 MB / 0.5169 GB, free: 4.129 MB / 382.1 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 0.005234/0.4645, allocations: 4.501 MB / 0.5213 GB, free: 15.89 MB / 398.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.002405/0.467, allocations: 0.7865 MB / 0.5221 GB, free: 15.52 MB / 398.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006828/0.4677, allocations: 303.6 kB / 0.5224 GB, free: 15.38 MB / 398.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.1106/0.5783, allocations: 56.34 MB / 0.5774 GB, free: 3.703 MB / 446.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.511e-05/0.5784, allocations: 46.98 kB / 0.5774 GB, free: 3.648 MB / 446.1 MB Notification: Performance of pre-optimization done (n=48): time 4.017e-06/0.5784, allocations: 0 / 0.5774 GB, free: 3.648 MB / 446.1 MB Notification: Performance of matching and sorting (n=52): time 0.007959/0.5863, allocations: 2.374 MB / 0.5797 GB, free: 1.199 MB / 446.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.074e-05/0.5865, allocations: 107.2 kB / 0.5798 GB, free: 1.07 MB / 446.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008071/0.5873, allocations: 0.5379 MB / 0.5804 GB, free: 0.5234 MB / 446.1 MB Notification: Performance of collectPreVariables (initialization): time 7.354e-05/0.5874, allocations: 37.7 kB / 0.5804 GB, free: 492 kB / 446.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0002413/0.5876, allocations: 316.3 kB / 0.5807 GB, free: 168 kB / 446.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001725/0.5878, allocations: 181.6 kB / 0.5809 GB, free: 15.98 MB / 462.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 9.559e-05/0.5879, allocations: 57.69 kB / 0.5809 GB, free: 15.92 MB / 462.1 MB Notification: Performance of setup shared object (initialization): time 0.0001377/0.5881, allocations: 370.8 kB / 0.5813 GB, free: 15.55 MB / 462.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006644/0.5887, allocations: 273.1 kB / 0.5815 GB, free: 15.28 MB / 462.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007491/0.5895, allocations: 450.6 kB / 0.582 GB, free: 14.77 MB / 462.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001338/0.5908, allocations: 0.6995 MB / 0.5827 GB, free: 14 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.489e-06/0.5908, allocations: 0 / 0.5827 GB, free: 14 MB / 462.1 MB Notification: Performance of matching and sorting (n=76) (initialization): time 0.002319/0.5932, allocations: 0.9792 MB / 0.5836 GB, free: 13.02 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 0.0001454/0.5933, allocations: 232.6 kB / 0.5838 GB, free: 12.72 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.038e-05/0.5934, allocations: 4 kB / 0.5838 GB, free: 12.72 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.002422/0.5958, allocations: 0.4885 MB / 0.5843 GB, free: 12.23 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000475/0.5963, allocations: 135.8 kB / 0.5845 GB, free: 12.09 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001356/0.5976, allocations: 0.9346 MB / 0.5854 GB, free: 11.13 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000796/0.5985, allocations: 87.88 kB / 0.5854 GB, free: 11.05 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.961e-05/0.5985, allocations: 39.98 kB / 0.5855 GB, free: 11.01 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 9.558e-06/0.5986, allocations: 4 kB / 0.5855 GB, free: 11 MB / 462.1 MB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002453/0.601, allocations: 0.9116 MB / 0.5864 GB, free: 10.09 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.518e-05/0.601, allocations: 7.938 kB / 0.5864 GB, free: 10.08 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.001458/0.6025, allocations: 340.5 kB / 0.5867 GB, free: 9.746 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004658/0.603, allocations: 147.8 kB / 0.5869 GB, free: 9.602 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001258/0.6043, allocations: 0.8729 MB / 0.5877 GB, free: 8.703 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007138/0.605, allocations: 91.81 kB / 0.5878 GB, free: 8.613 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.817e-05/0.6051, allocations: 31.98 kB / 0.5878 GB, free: 8.582 MB / 462.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 21 * Number of states: 0 () * Number of discrete variables: 6 (pump.heatTransfer.states[1].phase,Sink.medium.phase,Source.medium.phase,valve.state_b.phase,valve.state_a.phase,pump.monitoring.state_in.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (54): * Single equations (assignments): 53 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(4,19)} Notification: Performance of prepare postOptimizeDAE: time 0.0003809/0.6055, allocations: 288 kB / 0.5881 GB, free: 8.293 MB / 462.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001455/0.6056, allocations: 67.25 kB / 0.5882 GB, free: 8.227 MB / 462.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003575/0.6092, allocations: 2.754 MB / 0.5909 GB, free: 5.457 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.025e-05/0.6092, allocations: 31.95 kB / 0.5909 GB, free: 5.426 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.183e-06/0.6092, allocations: 0 / 0.5909 GB, free: 5.426 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.876e-06/0.6093, allocations: 3.984 kB / 0.5909 GB, free: 5.422 MB / 462.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004621/0.6139, allocations: 3.85 MB / 0.5946 GB, free: 1.512 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.084e-06/0.6139, allocations: 0 / 0.5946 GB, free: 1.512 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005525/0.6145, allocations: 151.8 kB / 0.5948 GB, free: 1.363 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004635/0.615, allocations: 109.6 kB / 0.5949 GB, free: 1.25 MB / 462.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.523e-05/0.615, allocations: 12 kB / 0.5949 GB, free: 1.238 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007709/0.6158, allocations: 1.14 MB / 0.596 GB, free: 48 kB / 462.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.715e-06/0.6158, allocations: 0 / 0.596 GB, free: 48 kB / 462.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003419/0.6192, allocations: 2.309 MB / 0.5983 GB, free: 13.72 MB / 478.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.000596/0.6199, allocations: 366.7 kB / 0.5986 GB, free: 13.34 MB / 478.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001684/0.62, allocations: 15.94 kB / 0.5986 GB, free: 13.32 MB / 478.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006052/0.6207, allocations: 67.91 kB / 0.5987 GB, free: 13.26 MB / 478.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000117/0.6208, allocations: 48.48 kB / 0.5987 GB, free: 13.21 MB / 478.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.926e-05/0.6208, allocations: 27.98 kB / 0.5988 GB, free: 13.18 MB / 478.1 MB Notification: Performance of sorting global known variables: time 0.0007832/0.6216, allocations: 0.5771 MB / 0.5993 GB, free: 12.6 MB / 478.1 MB Notification: Performance of sort global known variables: time 1.663e-06/0.6216, allocations: 4 kB / 0.5993 GB, free: 12.59 MB / 478.1 MB Notification: Performance of remove unused functions: time 0.00514/0.6268, allocations: 1.343 MB / 0.6007 GB, free: 11.25 MB / 478.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 2 (pump.medium.p,pump.medium.h) * Number of discrete variables: 21 ($cse1.phase,$cse1.region,$cse2.phase,$cse2.region,$cse4.phase,$cse4.region,$cse5.phase,$cse5.region,$cse7.phase,$cse7.region,$cse8.phase,$cse8.region,$cse9.region3boundary,$cse10.region3boundary,$cse12.phase,$cse12.region,$cse16.phase,$cse16.region,Source.medium.phase,Sink.medium.phase,pump.heatTransfer.states[1].phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (62): * Single equations (assignments): 50 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 10 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,1), (1,1)} Notification: Performance of Backend phase and start with SimCode phase: time 0.007523/0.6343, allocations: 1.39 MB / 0.602 GB, free: 9.855 MB / 478.1 MB Notification: Performance of simCode: created initialization part: time 0.003443/0.6378, allocations: 1.413 MB / 0.6034 GB, free: 8.445 MB / 478.1 MB Notification: Performance of simCode: created event and clocks part: time 5.2e-06/0.6378, allocations: 0 / 0.6034 GB, free: 8.445 MB / 478.1 MB Notification: Performance of simCode: created simulation system equations: time 0.001169/0.639, allocations: 0.7545 MB / 0.6041 GB, free: 7.695 MB / 478.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002129/0.6412, allocations: 351 kB / 0.6045 GB, free: 7.352 MB / 478.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003716/0.6449, allocations: 3.013 MB / 0.6074 GB, free: 4.316 MB / 478.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006299/0.6455, allocations: 1.126 MB / 0.6085 GB, free: 3.16 MB / 478.1 MB Notification: Performance of simCode: alias equations: time 0.001044/0.6466, allocations: 0.6684 MB / 0.6092 GB, free: 2.488 MB / 478.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000173/0.6468, allocations: 67.41 kB / 0.6092 GB, free: 2.426 MB / 478.1 MB Notification: Performance of SimCode: time 5.31e-07/0.6468, allocations: 0 / 0.6092 GB, free: 2.426 MB / 478.1 MB Notification: Performance of Templates: time 0.2577/0.9044, allocations: 49.88 MB / 0.6579 GB, free: 148.9 MB / 494.1 MB make -j1 -f ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.makefile Environment - environmentSimulation: (rm -f ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.pipe ; mkfifo ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.pipe ; head -c 1048576 < ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.pipe >> ../files/ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.sim & ./ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve -abortSlowSimulation -alarm=480 -lv LOG_STATS > ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Machines.TestWaterPumpCheckValve.pipe 2>&1) Environment - environmentSimulation: