Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.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/ThermoPower 3.1.0-master/package.mo", uses=false) Using package ThermoPower with version 3.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/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(ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A") translateModel(ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009144/0.0009144, allocations: 91.42 kB / 16.31 MB, free: 5.672 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001041/0.001041, allocations: 181.2 kB / 17.21 MB, free: 5.59 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.453/1.453, allocations: 205.4 MB / 223.4 MB, free: 5.531 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/package.mo): time 0.4586/0.4586, allocations: 48.77 MB / 320.4 MB, free: 3.824 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: Performance of FrontEnd - loaded program: time 0.0005314/0.0005314, allocations: 23.98 kB / 391.2 MB, free: 14.31 MB / 334.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1342/0.1347, allocations: 60.25 MB / 451.4 MB, free: 1.914 MB / 382.1 MB Notification: Performance of NFInst.instantiate(ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A): time 0.2585/0.3932, allocations: 48.13 MB / 499.6 MB, free: 18.78 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.01328/0.4066, allocations: 10.78 MB / 0.4984 GB, free: 11.21 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.000831/0.4075, allocations: 10.5 kB / 0.4984 GB, free: 11.21 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0009862/0.4085, allocations: 260.1 kB / 0.4986 GB, free: 11.07 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.001321/0.4098, allocations: 477.5 kB / 0.4991 GB, free: 10.78 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.01518/0.425, allocations: 4.073 MB / 0.5031 GB, free: 7.789 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.006092/0.4311, allocations: 5.678 MB / 0.5086 GB, free: 4.473 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.003241/0.4344, allocations: 1.904 MB / 0.5105 GB, free: 3.305 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.004323/0.4387, allocations: 1.646 MB / 0.5121 GB, free: 2.668 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.005748/0.4445, allocations: 2.997 MB / 0.515 GB, free: 1.188 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.001795/0.4463, allocations: 333.6 kB / 0.5153 GB, free: 1.125 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.01638/0.4627, allocations: 6.309 MB / 0.5215 GB, free: 10.8 MB / 398.1 MB Notification: Performance of NFScalarize.scalarize: time 0.004712/0.4675, allocations: 1.984 MB / 0.5234 GB, free: 8.816 MB / 398.1 MB Notification: Performance of NFVerifyModel.verify: time 0.002576/0.4701, allocations: 0.7495 MB / 0.5242 GB, free: 8.059 MB / 398.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01213/0.4823, allocations: 7.563 MB / 0.5315 GB, free: 492 kB / 398.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.774e-06/0.4823, allocations: 0 / 0.5315 GB, free: 492 kB / 398.1 MB Notification: Performance of FrontEnd: time 2.655e-06/0.4823, allocations: 0 / 0.5315 GB, free: 492 kB / 398.1 MB Notification: Performance of Transformations before backend: time 0.0001888/0.4825, allocations: 0 / 0.5315 GB, free: 492 kB / 398.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1391 * Number of variables: 1391 Notification: Performance of Generate backend data structure: time 0.02891/0.5114, allocations: 10.56 MB / 0.5419 GB, free: 5.855 MB / 414.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.192e-05/0.5115, allocations: 16.02 kB / 0.5419 GB, free: 5.84 MB / 414.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004325/0.5158, allocations: 0.7832 MB / 0.5426 GB, free: 5.051 MB / 414.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.006603/0.5225, allocations: 2.841 MB / 0.5454 GB, free: 2.16 MB / 414.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003253/0.5228, allocations: 402.7 kB / 0.5458 GB, free: 1.766 MB / 414.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001852/0.5247, allocations: 0.5156 MB / 0.5463 GB, free: 1.25 MB / 414.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.02938/0.5541, allocations: 12.27 MB / 0.5583 GB, free: 4.926 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0001226/0.5542, allocations: 0 / 0.5583 GB, free: 4.926 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.001615/0.5559, allocations: 216 kB / 0.5585 GB, free: 4.715 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0002129/0.5561, allocations: 223.4 kB / 0.5587 GB, free: 4.496 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03933/0.5954, allocations: 14.4 MB / 0.5728 GB, free: 6.074 MB / 446.1 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 0.03542/0.6309, allocations: 24.1 MB / 0.5963 GB, free: 12.08 MB / 478.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01057/0.6415, allocations: 4.666 MB / 0.6009 GB, free: 7.402 MB / 478.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.003351/0.6449, allocations: 2.121 MB / 0.6029 GB, free: 5.277 MB / 478.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.327/0.9719, allocations: 64.63 MB / 0.6661 GB, free: 138.2 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.271e-05/0.972, allocations: 64.84 kB / 0.6661 GB, free: 138.2 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=249): time 4.338e-06/0.972, allocations: 0 / 0.6661 GB, free: 138.2 MB / 0.4981 GB Notification: Performance of matching and sorting (n=249): time 0.1086/1.081, allocations: 27.48 MB / 0.6929 GB, free: 127.9 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.354e-05/1.081, allocations: 79.44 kB / 0.693 GB, free: 127.9 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004189/1.085, allocations: 3.986 MB / 0.6969 GB, free: 124.7 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 0.000907/1.086, allocations: 69.7 kB / 0.697 GB, free: 124.6 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.001667/1.088, allocations: 3.171 MB / 0.7001 GB, free: 121.5 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 0.001517/1.089, allocations: 1.006 MB / 0.7011 GB, free: 120.5 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0005052/1.09, allocations: 172 kB / 0.7012 GB, free: 120.3 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 0.0003494/1.09, allocations: 0.7207 MB / 0.7019 GB, free: 119.6 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.004975/1.095, allocations: 3.842 MB / 0.7057 GB, free: 115.7 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.007774/1.103, allocations: 8.904 MB / 0.7144 GB, free: 104.3 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.007529/1.11, allocations: 5.449 MB / 0.7197 GB, free: 98.86 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001191/1.11, allocations: 52 kB / 0.7197 GB, free: 98.81 MB / 0.4981 GB Notification: Performance of matching and sorting (n=1093) (initialization): time 0.02424/1.135, allocations: 15.05 MB / 0.7344 GB, free: 83.71 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 0.002993/1.138, allocations: 5.309 MB / 0.7396 GB, free: 75.91 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0001972/1.138, allocations: 177.2 kB / 0.7398 GB, free: 75.74 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.03446/1.172, allocations: 11.67 MB / 0.7512 GB, free: 64.05 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004569/1.177, allocations: 1.715 MB / 0.7529 GB, free: 62.34 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01622/1.193, allocations: 9.869 MB / 0.7625 GB, free: 52.44 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00652/1.2, allocations: 1.298 MB / 0.7638 GB, free: 51.13 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001491/1.201, allocations: 0.6326 MB / 0.7644 GB, free: 50.5 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 1.321e-05/1.201, allocations: 7.984 kB / 0.7644 GB, free: 50.49 MB / 0.4981 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.02318/1.225, allocations: 14.57 MB / 0.7786 GB, free: 35.88 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.000504/1.225, allocations: 188.3 kB / 0.7788 GB, free: 35.7 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.03382/1.259, allocations: 11.67 MB / 0.7902 GB, free: 24 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004302/1.263, allocations: 1.696 MB / 0.7919 GB, free: 22.3 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01576/1.279, allocations: 9.873 MB / 0.8015 GB, free: 12.4 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.006985/1.286, allocations: 0.9731 MB / 0.8025 GB, free: 11.43 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001706/1.288, allocations: 0.6384 MB / 0.8031 GB, free: 10.79 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 807 * Number of states: 0 () * Number of discrete variables: 14 (hex.fluidState[12].phase,hex.fluidState[11].phase,hex.fluidState[10].phase,hex.fluidState[9].phase,hex.fluidState[8].phase,hex.fluidState[7].phase,hex.fluidState[6].phase,hex.fluidState[5].phase,hex.fluidState[4].phase,hex.fluidState[3].phase,hex.fluidState[2].phase,hex.fluidState[1].phase,T_out.fluidState.phase,T_in.fluidState.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (918): * Single equations (assignments): 917 * 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 {13 163} Notification: Performance of prepare postOptimizeDAE: time 0.003746/1.292, allocations: 1.844 MB / 0.8049 GB, free: 8.93 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000762/1.292, allocations: 359.4 kB / 0.8052 GB, free: 8.574 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.2848/1.577, allocations: 32.52 MB / 0.837 GB, free: 146.4 MB / 0.5137 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.918e-05/1.577, allocations: 70.11 kB / 0.8371 GB, free: 146.4 MB / 0.5137 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 9.758e-06/1.577, allocations: 0 / 0.8371 GB, free: 146.4 MB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.467e-05/1.577, allocations: 14.98 kB / 0.8371 GB, free: 146.4 MB / 0.5137 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.05918/1.637, allocations: 44.65 MB / 0.8807 GB, free: 127.6 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.231e-05/1.637, allocations: 2.281 kB / 0.8807 GB, free: 127.6 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002274/1.639, allocations: 384.5 kB / 0.881 GB, free: 127.6 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.02877/1.668, allocations: 8.484 MB / 0.8893 GB, free: 123.4 MB / 0.5137 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.001154/1.669, allocations: 124.7 kB / 0.8895 GB, free: 123.3 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.04769/1.717, allocations: 30.23 MB / 0.919 GB, free: 92.91 MB / 0.5137 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.438e-06/1.717, allocations: 0.5 kB / 0.919 GB, free: 92.91 MB / 0.5137 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0334/1.75, allocations: 15.31 MB / 0.9339 GB, free: 77.54 MB / 0.5137 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002819/1.753, allocations: 0.9199 MB / 0.9348 GB, free: 76.59 MB / 0.5137 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0009993/1.754, allocations: 93.27 kB / 0.9349 GB, free: 76.5 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0029/1.757, allocations: 291.9 kB / 0.9352 GB, free: 76.21 MB / 0.5137 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001031/1.758, allocations: 247.2 kB / 0.9354 GB, free: 75.97 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002816/1.758, allocations: 103.9 kB / 0.9355 GB, free: 75.87 MB / 0.5137 GB Notification: Performance of sorting global known variables: time 0.002952/1.761, allocations: 2.325 MB / 0.9378 GB, free: 73.56 MB / 0.5137 GB Notification: Performance of sort global known variables: time 1.9e-07/1.761, allocations: 4 kB / 0.9378 GB, free: 73.55 MB / 0.5137 GB Notification: Performance of remove unused functions: time 0.01388/1.775, allocations: 3.375 MB / 0.9411 GB, free: 70.24 MB / 0.5137 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 13 (hex.p,hex.h[1],hex.h[2],hex.h[3],hex.h[4],hex.h[5],hex.h[6],hex.h[7],hex.h[8],hex.h[9],hex.h[10],hex.h[11],hex.h[12]) * Number of discrete variables: 28 ($cse1.phase,$cse1.region,$cse2.phase,$cse2.region,$cse16.phase,$cse16.region,$cse17.phase,$cse17.region,$cse18.phase,$cse18.region,$cse19.phase,$cse19.region,$cse20.phase,$cse20.region,$cse21.phase,$cse21.region,$cse22.phase,$cse22.region,$cse23.phase,$cse23.region,$cse24.phase,$cse24.region,$cse25.phase,$cse25.region,$cse26.phase,$cse26.region,$cse27.phase,$cse27.region) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (150): * Single equations (assignments): 135 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 14 * 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 {13 126} Notification: Performance of Backend phase and start with SimCode phase: time 0.004192/1.779, allocations: 1.037 MB / 0.9421 GB, free: 69.35 MB / 0.5137 GB Notification: Performance of simCode: created initialization part: time 0.02941/1.809, allocations: 16.88 MB / 0.9586 GB, free: 52.53 MB / 0.5137 GB Notification: Performance of simCode: created event and clocks part: time 1.107e-05/1.809, allocations: 4 kB / 0.9586 GB, free: 52.53 MB / 0.5137 GB Notification: Performance of simCode: created simulation system equations: time 0.01039/1.819, allocations: 4.695 MB / 0.9632 GB, free: 47.81 MB / 0.5137 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005022/1.824, allocations: 0.7118 MB / 0.9639 GB, free: 47.11 MB / 0.5137 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01763/1.842, allocations: 13.66 MB / 0.9772 GB, free: 33.46 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001876/1.844, allocations: 2.805 MB / 0.98 GB, free: 30.62 MB / 0.5137 GB Notification: Performance of simCode: alias equations: time 0.01064/1.854, allocations: 5.647 MB / 0.9855 GB, free: 24.97 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001053/1.856, allocations: 287.3 kB / 0.9858 GB, free: 24.69 MB / 0.5137 GB Notification: Performance of SimCode: time 1.332e-06/1.856, allocations: 0 / 0.9858 GB, free: 24.69 MB / 0.5137 GB Notification: Performance of Templates: time 0.4145/2.27, allocations: 179.5 MB / 1.161 GB, free: 53.83 MB / 0.5294 GB make -j1 -f ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.makefile Environment - environmentSimulation: (rm -f ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.pipe ; mkfifo ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.pipe ; head -c 1048576 < ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.pipe >> ../files/ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.sim & ./ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A -abortSlowSimulation -alarm=480 -lv LOG_STATS > ThermoPower_ThermoPower.Test.DistributedParameterComponents.TestWaterFlow1DFEM_A.pipe 2>&1) Environment - environmentSimulation: