Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction.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 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.3+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: "" <> buildModelFMU(ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction,fileNamePrefix="ModelicaTest_3_2_3_ModelicaTest_Fluid_TestComponents_Fittings_TestWallFriction",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction,fileNamePrefix="ModelicaTest_3_2_3_ModelicaTest_Fluid_TestComponents_Fittings_TestWallFriction",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 0.001196/0.001197, allocations: 96.28 kB / 15.69 MB, free: 480 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002007/0.002007, allocations: 178.7 kB / 16.57 MB, free: 6.387 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.838/1.838, allocations: 205.4 MB / 222.7 MB, free: 5.676 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.3+maint.om/package.mo): time 0.4213/0.4213, allocations: 43.55 MB / 314.5 MB, free: 8.746 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 0.000521/0.000521, allocations: 16 kB / 384 MB, free: 7.941 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1141/0.1147, allocations: 58.86 MB / 442.9 MB, free: 12.97 MB / 382.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction): time 0.2502/0.3649, allocations: 30.29 MB / 473.1 MB, free: 33.88 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.01772/0.3827, allocations: 14.03 MB / 487.2 MB, free: 24.07 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002196/0.3849, allocations: 50.38 kB / 487.2 MB, free: 24.05 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001915/0.3869, allocations: 0.5235 MB / 487.7 MB, free: 23.75 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.006701/0.3936, allocations: 1.93 MB / 489.7 MB, free: 22.57 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.008119/0.4017, allocations: 2.795 MB / 492.5 MB, free: 21.21 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.004752/0.4065, allocations: 2.117 MB / 494.6 MB, free: 20.14 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001545/0.4081, allocations: 0.8322 MB / 495.4 MB, free: 19.83 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002388/0.4105, allocations: 1.127 MB / 496.5 MB, free: 19.34 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001645/0.4122, allocations: 0.8629 MB / 497.4 MB, free: 19.01 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002431/0.4124, allocations: 62.59 kB / 497.5 MB, free: 19.01 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.00666/0.4191, allocations: 2.719 MB / 0.4885 GB, free: 18.29 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0006889/0.4198, allocations: 337.6 kB / 0.4888 GB, free: 18.14 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.00098/0.4208, allocations: 315.6 kB / 0.4891 GB, free: 17.98 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.007931/0.4288, allocations: 2.683 MB / 0.4917 GB, free: 17.37 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.747e-06/0.4288, allocations: 0 / 0.4917 GB, free: 17.37 MB / 382.1 MB Notification: Performance of FrontEnd: time 3.747e-06/0.4288, allocations: 0 / 0.4917 GB, free: 17.37 MB / 382.1 MB Notification: Performance of Transformations before backend: time 4.833e-05/0.4289, allocations: 0 / 0.4917 GB, free: 17.37 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: 254 * Number of variables: 254 Notification: Performance of Generate backend data structure: time 0.005447/0.4343, allocations: 1.87 MB / 0.4935 GB, free: 16.12 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.343e-05/0.4344, allocations: 13.33 kB / 0.4935 GB, free: 16.11 MB / 382.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.000353/0.4348, allocations: 166.6 kB / 0.4937 GB, free: 16 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007923/0.4356, allocations: 179.8 kB / 0.4939 GB, free: 15.93 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002241/0.4378, allocations: 0.9949 MB / 0.4948 GB, free: 15.35 MB / 382.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.895e-05/0.4379, allocations: 74.62 kB / 0.4949 GB, free: 15.32 MB / 382.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001493/0.4381, allocations: 94.97 kB / 0.495 GB, free: 15.29 MB / 382.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002588/0.4407, allocations: 1.438 MB / 0.4964 GB, free: 14.59 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.693e-05/0.4407, allocations: 9.984 kB / 0.4964 GB, free: 14.58 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001258/0.4408, allocations: 51.45 kB / 0.4965 GB, free: 14.54 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.961e-05/0.4409, allocations: 54.38 kB / 0.4965 GB, free: 14.54 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002378/0.4433, allocations: 1.336 MB / 0.4978 GB, free: 14.07 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 0.01128/0.4546, allocations: 6.704 MB / 0.5044 GB, free: 9.117 MB / 382.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001278/0.4559, allocations: 0.5607 MB / 0.5049 GB, free: 8.887 MB / 382.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.02153/0.4775, allocations: 15.41 MB / 0.52 GB, free: 8.824 MB / 398.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.00096/0.4785, allocations: 490.5 kB / 0.5204 GB, free: 8.445 MB / 398.1 MB Notification: Performance of pre-optimization done (n=49): time 3.126e-06/0.4785, allocations: 0 / 0.5204 GB, free: 8.445 MB / 398.1 MB Notification: Performance of matching and sorting (n=49): time 0.002632/0.4811, allocations: 0.9901 MB / 0.5214 GB, free: 7.879 MB / 398.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0003008/0.4815, allocations: 0.5472 MB / 0.5219 GB, free: 7.211 MB / 398.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002408/0.4839, allocations: 1.27 MB / 0.5232 GB, free: 6.504 MB / 398.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0001028/0.484, allocations: 38.08 kB / 0.5232 GB, free: 6.465 MB / 398.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0005821/0.4846, allocations: 0.7114 MB / 0.5239 GB, free: 5.832 MB / 398.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0002062/0.4848, allocations: 175.4 kB / 0.5241 GB, free: 5.684 MB / 398.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 6.108e-05/0.4849, allocations: 21.12 kB / 0.5241 GB, free: 5.668 MB / 398.1 MB Notification: Performance of setup shared object (initialization): time 0.0001447/0.485, allocations: 352.2 kB / 0.5244 GB, free: 5.328 MB / 398.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005964/0.4856, allocations: 330.3 kB / 0.5247 GB, free: 5.168 MB / 398.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.00101/0.4867, allocations: 0.8874 MB / 0.5256 GB, free: 4.25 MB / 398.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.000763/0.4874, allocations: 0.4892 MB / 0.5261 GB, free: 3.973 MB / 398.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.169e-05/0.4874, allocations: 8.156 kB / 0.5261 GB, free: 3.969 MB / 398.1 MB Notification: Performance of matching and sorting (n=138) (initialization): time 0.002543/0.49, allocations: 1.316 MB / 0.5274 GB, free: 3.293 MB / 398.1 MB Notification: Performance of prepare postOptimizeDAE: time 0.002227/0.4922, allocations: 5.841 MB / 0.5331 GB, free: 13.08 MB / 414.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.331e-05/0.4923, allocations: 15.72 kB / 0.5331 GB, free: 13.08 MB / 414.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 6.259e-05/0.4924, allocations: 21.97 kB / 0.5331 GB, free: 13.08 MB / 414.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002085/0.4945, allocations: 360.9 kB / 0.5335 GB, free: 12.98 MB / 414.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008864/0.4954, allocations: 1.253 MB / 0.5347 GB, free: 11.75 MB / 414.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001942/0.4973, allocations: 181.6 kB / 0.5349 GB, free: 11.64 MB / 414.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001746/0.4975, allocations: 73.62 kB / 0.5349 GB, free: 11.62 MB / 414.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.605e-05/0.4975, allocations: 4.188 kB / 0.5349 GB, free: 11.62 MB / 414.1 MB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002203/0.4997, allocations: 1.154 MB / 0.5361 GB, free: 11.04 MB / 414.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.512e-05/0.4998, allocations: 12.19 kB / 0.5361 GB, free: 11.04 MB / 414.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 2.498e-05/0.4998, allocations: 27.12 kB / 0.5361 GB, free: 11.03 MB / 414.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001001/0.5008, allocations: 283.8 kB / 0.5364 GB, free: 10.96 MB / 414.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.000432/0.5013, allocations: 0.6273 MB / 0.537 GB, free: 10.35 MB / 414.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001619/0.5029, allocations: 151.2 kB / 0.5371 GB, free: 10.26 MB / 414.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001348/0.503, allocations: 65.75 kB / 0.5372 GB, free: 10.25 MB / 414.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 66 * Number of states: 0 () * Number of discrete variables: 7 ($whenCondition1,p_table.a,p_table.b,p_table.last,$PRE.p_table.nextEvent,p_table.nextEvent,p_table.nextEventScaled) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (133): * Single equations (assignments): 130 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 2 * 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: 2 {1,1} * Without analytic Jacobian: 0 Notification: Performance of prepare postOptimizeDAE: time 0.001108/0.5042, allocations: 434.7 kB / 0.5376 GB, free: 9.895 MB / 414.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003692/0.5045, allocations: 137.9 kB / 0.5377 GB, free: 9.824 MB / 414.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002696/0.5072, allocations: 1.439 MB / 0.5391 GB, free: 9.023 MB / 414.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.269e-05/0.5073, allocations: 7.844 kB / 0.5391 GB, free: 9.023 MB / 414.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.916e-06/0.5073, allocations: 5.609 kB / 0.5392 GB, free: 9.02 MB / 414.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 9.988e-06/0.5073, allocations: 3.984 kB / 0.5392 GB, free: 9.016 MB / 414.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003833/0.5111, allocations: 2.248 MB / 0.5414 GB, free: 7.27 MB / 414.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.613e-06/0.5112, allocations: 0 / 0.5414 GB, free: 7.27 MB / 414.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001399/0.5126, allocations: 255.7 kB / 0.5416 GB, free: 7.02 MB / 414.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 1.217e-05/0.5126, allocations: 4 kB / 0.5416 GB, free: 7.016 MB / 414.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.388e-05/0.5127, allocations: 27.94 kB / 0.5416 GB, free: 6.988 MB / 414.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0008778/0.5135, allocations: 1.184 MB / 0.5428 GB, free: 5.758 MB / 414.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.988e-06/0.5136, allocations: 0 / 0.5428 GB, free: 5.758 MB / 414.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002146/0.5157, allocations: 1.072 MB / 0.5438 GB, free: 4.648 MB / 414.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0008144/0.5165, allocations: 278.9 kB / 0.5441 GB, free: 4.355 MB / 414.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002362/0.5168, allocations: 23.98 kB / 0.5441 GB, free: 4.332 MB / 414.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007771/0.5176, allocations: 52.03 kB / 0.5442 GB, free: 4.281 MB / 414.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001627/0.5177, allocations: 56.53 kB / 0.5442 GB, free: 4.227 MB / 414.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.082e-05/0.5178, allocations: 31.98 kB / 0.5443 GB, free: 4.195 MB / 414.1 MB Notification: Performance of sorting global known variables: time 0.001553/0.5194, allocations: 0.8752 MB / 0.5451 GB, free: 3.32 MB / 414.1 MB Notification: Performance of sort global known variables: time 3.81e-07/0.5194, allocations: 0 / 0.5451 GB, free: 3.32 MB / 414.1 MB Notification: Performance of remove unused functions: time 0.005605/0.525, allocations: 1.28 MB / 0.5464 GB, free: 2.039 MB / 414.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 0 () * Number of discrete variables: 6 ($whenCondition1,p_table.a,p_table.b,p_table.last,p_table.nextEvent,p_table.nextEventScaled) * Number of discrete states: 6 (p_table.nextEvent,p_table.last,p_table.nextEventScaled,p_table.b,p_table.a,$whenCondition1) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (77): * Single equations (assignments): 66 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 8 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 2 * 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: 2 {1,1} * Without analytic Jacobian: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.006425/0.5315, allocations: 2.603 MB / 0.5489 GB, free: 15.4 MB / 430.1 MB Notification: Performance of simCode: created initialization part: time 0.00439/0.5359, allocations: 1.792 MB / 0.5506 GB, free: 13.59 MB / 430.1 MB Notification: Performance of simCode: created event and clocks part: time 7.574e-06/0.5359, allocations: 0 / 0.5506 GB, free: 13.59 MB / 430.1 MB Notification: Performance of simCode: created simulation system equations: time 0.001833/0.5378, allocations: 0.6634 MB / 0.5513 GB, free: 12.91 MB / 430.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003315/0.5411, allocations: 0.5525 MB / 0.5518 GB, free: 12.36 MB / 430.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01088/0.552, allocations: 13.8 MB / 0.5653 GB, free: 14.22 MB / 446.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007719/0.5528, allocations: 1.202 MB / 0.5665 GB, free: 12.99 MB / 446.1 MB Notification: Performance of simCode: alias equations: time 0.002213/0.555, allocations: 0.5108 MB / 0.567 GB, free: 12.49 MB / 446.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007367/0.5558, allocations: 0.5344 MB / 0.5675 GB, free: 11.96 MB / 446.1 MB Notification: Performance of SimCode: time 1.242e-06/0.5558, allocations: 0 / 0.5675 GB, free: 11.96 MB / 446.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.08625/0.6421, allocations: 47.75 MB / 0.6141 GB, free: 12.2 MB / 494.1 MB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.000238/0.6423, allocations: 265.1 kB / 0.6144 GB, free: 11.84 MB / 494.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 3.569/4.211, allocations: 0 / 0.6144 GB, free: 11.84 MB / 494.1 MB (rm -f ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction.pipe ; mkfifo ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction.pipe ; head -c 1048576 < ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction.pipe >> ../files/ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator -r=ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction_res.mat --tempDir=temp_ModelicaTest_3_2_3_ModelicaTest_Fluid_TestComponents_Fittings_TestWallFriction_fmu --startTime=0 --stopTime=10 --timeout=50 --tolerance=1e-06 ModelicaTest_3_2_3_ModelicaTest_Fluid_TestComponents_Fittings_TestWallFriction.fmu > ModelicaTest_3.2.3_ModelicaTest.Fluid.TestComponents.Fittings.TestWallFriction.pipe 2>&1) Environment - environmentSimulation: