Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.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 3.2.2+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.2+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.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP,tolerance=1e-05,outputFormat="empty",numberOfIntervals=10100,variableFilter="",fileNamePrefix="ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP") translateModel(ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP,tolerance=1e-05,outputFormat="empty",numberOfIntervals=10100,variableFilter="",fileNamePrefix="ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008113/0.0008112, allocations: 91.84 kB / 15.36 MB, free: 0.7383 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.006334/0.006334, allocations: 169.9 kB / 16.26 MB, free: 6.676 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.818/1.818, allocations: 205.4 MB / 222.4 MB, free: 5.559 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.2+maint.om/package.mo): time 0.4107/0.4107, allocations: 40 MB / 310.7 MB, free: 9.574 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 3.2.2. 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 0.0005906/0.0005908, allocations: 12 kB / 379.5 MB, free: 11.96 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1625/0.1631, allocations: 57.95 MB / 437.4 MB, free: 1.898 MB / 366.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP): time 0.003482/0.1666, allocations: 1.953 MB / 439.4 MB, free: 15.93 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.009597/0.1763, allocations: 5.527 MB / 444.9 MB, free: 10.38 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0003744/0.1767, allocations: 4 kB / 444.9 MB, free: 10.38 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0005887/0.1773, allocations: 79.52 kB / 445 MB, free: 10.3 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0004679/0.1778, allocations: 99.36 kB / 445.1 MB, free: 10.2 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.006207/0.1841, allocations: 1.398 MB / 446.5 MB, free: 8.801 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.001168/0.1852, allocations: 0.9489 MB / 447.4 MB, free: 7.848 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0002376/0.1855, allocations: 138.1 kB / 447.6 MB, free: 7.699 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0006216/0.1861, allocations: 314.3 kB / 447.9 MB, free: 7.391 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.000809/0.1869, allocations: 405.8 kB / 448.3 MB, free: 6.992 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002233/0.1872, allocations: 24 kB / 448.3 MB, free: 6.969 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.005287/0.1925, allocations: 2.893 MB / 451.2 MB, free: 4.07 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0003672/0.1929, allocations: 179 kB / 451.4 MB, free: 3.895 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0006493/0.1935, allocations: 399 kB / 451.8 MB, free: 3.496 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.005747/0.1993, allocations: 2.415 MB / 454.2 MB, free: 1.074 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 6.211e-06/0.1993, allocations: 4 kB / 454.2 MB, free: 1.07 MB / 382.1 MB Notification: Performance of FrontEnd: time 2.174e-06/0.1993, allocations: 0 / 454.2 MB, free: 1.07 MB / 382.1 MB Notification: Performance of Transformations before backend: time 5.748e-05/0.1994, allocations: 0 / 454.2 MB, free: 1.07 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: 250 * Number of variables: 250 Notification: Performance of Generate backend data structure: time 0.2917/0.4911, allocations: 1.583 MB / 455.8 MB, free: 40.5 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.801e-05/0.4912, allocations: 9.891 kB / 455.8 MB, free: 40.5 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002777/0.4915, allocations: 104.5 kB / 455.9 MB, free: 40.45 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0006171/0.4921, allocations: 476.7 kB / 456.3 MB, free: 40.18 MB / 382.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.326e-05/0.4922, allocations: 63.33 kB / 456.4 MB, free: 40.17 MB / 382.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001367/0.4923, allocations: 80.41 kB / 456.5 MB, free: 40.17 MB / 382.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002578/0.4949, allocations: 1.746 MB / 458.2 MB, free: 39.96 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.482e-05/0.4949, allocations: 2.969 kB / 458.2 MB, free: 39.96 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.054e-05/0.495, allocations: 32.41 kB / 458.3 MB, free: 39.96 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.459e-05/0.4951, allocations: 78.78 kB / 458.3 MB, free: 39.96 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00336/0.4985, allocations: 1.981 MB / 460.3 MB, free: 39.93 MB / 382.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.00376/0.5022, allocations: 3.745 MB / 464.1 MB, free: 38 MB / 382.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001614/0.5039, allocations: 1.052 MB / 465.1 MB, free: 37.56 MB / 382.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.001287/0.5052, allocations: 0.6549 MB / 465.8 MB, free: 37.4 MB / 382.1 MB Notification: Performance of preOpt evalFunc (simulation): time 6.491e-05/0.5052, allocations: 20.45 kB / 465.8 MB, free: 37.4 MB / 382.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.297e-05/0.5053, allocations: 58.14 kB / 465.8 MB, free: 37.36 MB / 382.1 MB Notification: Performance of pre-optimization done (n=38): time 4.319e-06/0.5053, allocations: 0 / 465.8 MB, free: 37.36 MB / 382.1 MB Notification: Performance of matching and sorting (n=38): time 0.005308/0.5106, allocations: 1.803 MB / 467.6 MB, free: 37.24 MB / 382.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001307/0.5108, allocations: 0.4997 MB / 468.1 MB, free: 36.64 MB / 382.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001074/0.5118, allocations: 0.8902 MB / 469 MB, free: 36.47 MB / 382.1 MB Notification: Performance of collectPreVariables (initialization): time 4.648e-05/0.5119, allocations: 32.83 kB / 469.1 MB, free: 36.44 MB / 382.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0002916/0.5122, allocations: 0.5405 MB / 469.6 MB, free: 36.13 MB / 382.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001172/0.5123, allocations: 145.7 kB / 469.8 MB, free: 36.05 MB / 382.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001678/0.5125, allocations: 110 kB / 469.9 MB, free: 36.04 MB / 382.1 MB Notification: Performance of setup shared object (initialization): time 0.0001817/0.5127, allocations: 396.1 kB / 470.2 MB, free: 35.72 MB / 382.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001519/0.5142, allocations: 0.6799 MB / 470.9 MB, free: 35.71 MB / 382.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001787/0.516, allocations: 1.351 MB / 472.3 MB, free: 34.81 MB / 382.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.00335/0.5194, allocations: 2.046 MB / 474.3 MB, free: 33.88 MB / 382.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.428e-05/0.5194, allocations: 6.625 kB / 474.3 MB, free: 33.88 MB / 382.1 MB Notification: Performance of matching and sorting (n=134) (initialization): time 0.004387/0.5238, allocations: 2.001 MB / 476.3 MB, free: 33.77 MB / 382.1 MB Notification: Performance of prepare postOptimizeDAE: time 3.423e-05/0.5239, allocations: 15.12 kB / 476.3 MB, free: 33.77 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.1e-05/0.5239, allocations: 22 kB / 476.4 MB, free: 33.77 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 5.216e-05/0.524, allocations: 34.48 kB / 476.4 MB, free: 33.77 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001375/0.5254, allocations: 357.4 kB / 476.7 MB, free: 33.76 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.378e-05/0.5254, allocations: 42.7 kB / 476.8 MB, free: 33.76 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001397/0.5268, allocations: 301.5 kB / 477.1 MB, free: 33.67 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001229/0.527, allocations: 73.05 kB / 477.2 MB, free: 33.67 MB / 382.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 108 * Number of states: 0 () * Number of discrete variables: 50 (IN_con_2[5].geodeticPressureLoss,IN_con_2[5].massFlowRateCorrection,IN_con_2[5].momentumPressureLoss,IN_con_2[5].voidFractionApproach,IN_con_2[5].frictionalPressureLoss,IN_con_2[4].geodeticPressureLoss,IN_con_2[4].massFlowRateCorrection,IN_con_2[4].momentumPressureLoss,IN_con_2[4].voidFractionApproach,IN_con_2[4].frictionalPressureLoss,IN_con_2[3].geodeticPressureLoss,IN_con_2[3].massFlowRateCorrection,IN_con_2[3].momentumPressureLoss,IN_con_2[3].voidFractionApproach,IN_con_2[3].frictionalPressureLoss,IN_con_2[2].geodeticPressureLoss,IN_con_2[2].massFlowRateCorrection,IN_con_2[2].momentumPressureLoss,IN_con_2[2].voidFractionApproach,IN_con_2[2].frictionalPressureLoss,IN_con_2[1].geodeticPressureLoss,IN_con_2[1].massFlowRateCorrection,IN_con_2[1].momentumPressureLoss,IN_con_2[1].voidFractionApproach,IN_con_2[1].frictionalPressureLoss,IN_con_1[5].geodeticPressureLoss,IN_con_1[5].massFlowRateCorrection,IN_con_1[5].momentumPressureLoss,IN_con_1[5].voidFractionApproach,IN_con_1[5].frictionalPressureLoss,IN_con_1[4].geodeticPressureLoss,IN_con_1[4].massFlowRateCorrection,IN_con_1[4].momentumPressureLoss,IN_con_1[4].voidFractionApproach,IN_con_1[4].frictionalPressureLoss,IN_con_1[3].geodeticPressureLoss,IN_con_1[3].massFlowRateCorrection,IN_con_1[3].momentumPressureLoss,IN_con_1[3].voidFractionApproach,IN_con_1[3].frictionalPressureLoss,IN_con_1[2].geodeticPressureLoss,IN_con_1[2].massFlowRateCorrection,IN_con_1[2].momentumPressureLoss,IN_con_1[2].voidFractionApproach,IN_con_1[2].frictionalPressureLoss,IN_con_1[1].geodeticPressureLoss,IN_con_1[1].massFlowRateCorrection,IN_con_1[1].momentumPressureLoss,IN_con_1[1].voidFractionApproach,IN_con_1[1].frictionalPressureLoss) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (134): * Single equations (assignments): 134 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0006605/0.5276, allocations: 444.7 kB / 477.6 MB, free: 33.53 MB / 382.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000478/0.5281, allocations: 85.44 kB / 477.7 MB, free: 33.48 MB / 382.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001131/0.5293, allocations: 0.5043 MB / 478.2 MB, free: 33.41 MB / 382.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.34e-05/0.5293, allocations: 9.281 kB / 478.2 MB, free: 33.41 MB / 382.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.07e-05/0.5293, allocations: 3.281 kB / 478.2 MB, free: 33.41 MB / 382.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 9.989e-06/0.5293, allocations: 9.188 kB / 478.2 MB, free: 33.41 MB / 382.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001793/0.5311, allocations: 0.7064 MB / 478.9 MB, free: 33.2 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.404e-06/0.5311, allocations: 3.125 kB / 478.9 MB, free: 33.2 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007926/0.5319, allocations: 237.2 kB / 479.1 MB, free: 33.19 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 1.183e-05/0.532, allocations: 10.12 kB / 479.2 MB, free: 33.19 MB / 382.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.908e-05/0.532, allocations: 20.36 kB / 479.2 MB, free: 33.19 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.346e-06/0.532, allocations: 6.875 kB / 479.2 MB, free: 33.19 MB / 382.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.591e-06/0.532, allocations: 7.188 kB / 479.2 MB, free: 33.18 MB / 382.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003175/0.5352, allocations: 2.591 MB / 481.8 MB, free: 31.61 MB / 382.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0001963/0.5354, allocations: 158.9 kB / 481.9 MB, free: 31.46 MB / 382.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001395/0.5356, allocations: 17.3 kB / 481.9 MB, free: 31.46 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00128/0.5369, allocations: 156.5 kB / 482.1 MB, free: 31.44 MB / 382.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003018/0.5372, allocations: 143.2 kB / 482.2 MB, free: 31.41 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.948e-05/0.5372, allocations: 21.5 kB / 482.3 MB, free: 31.41 MB / 382.1 MB Notification: Performance of sorting global known variables: time 0.0006781/0.5379, allocations: 0.5751 MB / 482.8 MB, free: 31.19 MB / 382.1 MB Notification: Performance of sort global known variables: time 1.1e-07/0.5379, allocations: 0 / 482.8 MB, free: 31.19 MB / 382.1 MB Notification: Performance of remove unused functions: time 0.002228/0.5402, allocations: 497.4 kB / 483.3 MB, free: 31.12 MB / 382.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 18 * 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 simulation (38): * Single equations (assignments): 38 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001424/0.5416, allocations: 0.5087 MB / 483.8 MB, free: 30.98 MB / 382.1 MB Notification: Performance of simCode: created initialization part: time 0.003299/0.5449, allocations: 1.513 MB / 485.3 MB, free: 30.69 MB / 382.1 MB Notification: Performance of simCode: created event and clocks part: time 5.411e-06/0.5449, allocations: 4.25 kB / 485.3 MB, free: 30.68 MB / 382.1 MB Notification: Performance of simCode: created simulation system equations: time 0.002203/0.5471, allocations: 1.003 MB / 486.3 MB, free: 30.5 MB / 382.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002287/0.5494, allocations: 114.9 kB / 486.5 MB, free: 30.46 MB / 382.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003936/0.5534, allocations: 2.054 MB / 488.5 MB, free: 29.31 MB / 382.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001206/0.5546, allocations: 1.124 MB / 489.6 MB, free: 28.57 MB / 382.1 MB Notification: Performance of simCode: alias equations: time 0.001508/0.5561, allocations: 441.9 kB / 490.1 MB, free: 28.49 MB / 382.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002877/0.5564, allocations: 71.94 kB / 490.1 MB, free: 28.48 MB / 382.1 MB Notification: Performance of SimCode: time 6.51e-07/0.5564, allocations: 0 / 490.1 MB, free: 28.48 MB / 382.1 MB Notification: Performance of Templates: time 0.03544/0.5919, allocations: 14.58 MB / 0.4929 GB, free: 24.89 MB / 382.1 MB make -j1 -f ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.makefile Environment - environmentSimulation: (rm -f ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.pipe ; mkfifo ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.pipe ; head -c 1048576 < ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.pipe >> ../files/ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.sim & ./ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP -abortSlowSimulation -alarm=480 -lv LOG_STATS > ModelicaTest_3.2.2_ModelicaTest.Fluid.Dissipation.Verifications.PressureLoss.StraightPipe.dp_twoPhaseOverall_DP.pipe 2>&1) Environment - environmentSimulation: