Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr AES_AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.001385/0.001385, allocations: 114.3 kB / 18.94 MB, free: 2.957 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.001705/0.001705, allocations: 217.7 kB / 22.26 MB, free: 5.113 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 1.482/1.482, allocations: 230.6 MB / 256 MB, free: 8.223 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo): time 0.1328/0.1328, allocations: 24.12 MB / 336.6 MB, free: 11.48 MB / 270.1 MB " [Timeout remaining time 180] Using package AES with version (/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: "" <> buildModelFMU(AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise,fileNamePrefix="AES_AES_Coursework_Tuning_brushup_MSL_loop_2dof_noise",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise,fileNamePrefix="AES_AES_Coursework_Tuning_brushup_MSL_loop_2dof_noise",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: AES requested package Modelica of version 4.0.0. Modelica 4.1.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002527/0.002527, allocations: 75.89 kB / 473.3 MB, free: 6.402 MB / 334.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3701/0.3726, allocations: 59.59 MB / 0.5204 GB, free: 10.19 MB / 382.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Blocks/Interfaces.mo:1329:5-1330:50:writable] Warning: An inner declaration for outer component globalSeed could not be found and was automatically generated. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Blocks/Interfaces.mo:1329:5-1330:50:writable] Notification: The diagnostics message for the missing inner is: Your model is using an outer \"globalSeed\" component but an inner \"globalSeed\" component is not defined and therefore a default inner \"globalSeed\" component is introduced by the tool. To change the default setting, drag Noise.GlobalSeed into your model and specify the seed. Notification: Performance of NFInst.instantiate(AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise): time 0.03757/0.4102, allocations: 22.67 MB / 0.5426 GB, free: 2.148 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.00327/0.4135, allocations: 1.691 MB / 0.5442 GB, free: 1.031 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001671/0.4136, allocations: 10.28 kB / 0.5442 GB, free: 1.023 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0003727/0.414, allocations: 71.83 kB / 0.5443 GB, free: 0.9883 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0002606/0.4143, allocations: 103.1 kB / 0.5444 GB, free: 0.918 MB / 382.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Math/Random.mo:1057:5-1146:31:writable] Warning: Pure function 'Modelica.Math.Random.Utilities.initializeImpureRandom' contains a call to impure function 'Modelica.Math.Random.Utilities.initializeImpureRandom.setInternalState'. Notification: Performance of NFTyping.typeClassSections: time 0.001303/0.4156, allocations: 0.5181 MB / 0.5449 GB, free: 0.5273 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.0005911/0.4161, allocations: 473 kB / 0.5453 GB, free: 164 kB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.000142/0.4163, allocations: 46.44 kB / 0.5454 GB, free: 128 kB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0003019/0.4166, allocations: 184.1 kB / 0.5456 GB, free: 15.98 MB / 398.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0007436/0.4173, allocations: 222.7 kB / 0.5458 GB, free: 15.82 MB / 398.1 MB Notification: Performance of NFPackage.collectConstants: time 5.667e-05/0.4174, allocations: 24 kB / 0.5458 GB, free: 15.8 MB / 398.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0008573/0.4182, allocations: 471.1 kB / 0.5462 GB, free: 15.45 MB / 398.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001625/0.4184, allocations: 103.3 kB / 0.5463 GB, free: 15.37 MB / 398.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0001624/0.4186, allocations: 127.9 kB / 0.5465 GB, free: 15.26 MB / 398.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0009428/0.4195, allocations: 0.5414 MB / 0.547 GB, free: 14.87 MB / 398.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.238e-06/0.4195, allocations: 0 / 0.547 GB, free: 14.87 MB / 398.1 MB Notification: Performance of FrontEnd: time 1.784e-06/0.4195, allocations: 0 / 0.547 GB, free: 14.87 MB / 398.1 MB Notification: Performance of Transformations before backend: time 7.054e-06/0.4195, allocations: 0 / 0.547 GB, free: 14.87 MB / 398.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 34 * Number of variables: 34 Notification: Performance of Generate backend data structure: time 0.002043/0.4216, allocations: 0.7474 MB / 0.5477 GB, free: 14.19 MB / 398.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.511e-05/0.4216, allocations: 8.031 kB / 0.5477 GB, free: 14.18 MB / 398.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 7.2e-05/0.4217, allocations: 54.59 kB / 0.5478 GB, free: 14.12 MB / 398.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000157/0.4218, allocations: 37.41 kB / 0.5478 GB, free: 14.09 MB / 398.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.000942/0.4228, allocations: 351.8 kB / 0.5482 GB, free: 13.78 MB / 398.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.487e-05/0.4228, allocations: 8.375 kB / 0.5482 GB, free: 13.77 MB / 398.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 4.656e-05/0.4229, allocations: 21.06 kB / 0.5482 GB, free: 13.75 MB / 398.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.000402/0.4233, allocations: 177.5 kB / 0.5484 GB, free: 13.6 MB / 398.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.498e-05/0.4233, allocations: 0 / 0.5484 GB, free: 13.6 MB / 398.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.094e-05/0.4233, allocations: 4 kB / 0.5484 GB, free: 13.6 MB / 398.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.907e-06/0.4233, allocations: 4 kB / 0.5484 GB, free: 13.59 MB / 398.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003977/0.4237, allocations: 173.9 kB / 0.5485 GB, free: 13.46 MB / 398.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001267/0.425, allocations: 0.616 MB / 0.5491 GB, free: 12.92 MB / 398.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0006947/0.4257, allocations: 258.2 kB / 0.5494 GB, free: 12.7 MB / 398.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002298/0.4259, allocations: 111.8 kB / 0.5495 GB, free: 12.6 MB / 398.1 MB Notification: Performance of preOpt evalFunc (simulation): time 2.437e-05/0.4259, allocations: 4.797 kB / 0.5495 GB, free: 12.6 MB / 398.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0003354/0.4263, allocations: 176.4 kB / 0.5497 GB, free: 12.45 MB / 398.1 MB Notification: Performance of pre-optimization done (n=25): time 1.703e-06/0.4263, allocations: 7.938 kB / 0.5497 GB, free: 12.44 MB / 398.1 MB Notification: Performance of matching and sorting (n=25): time 0.001676/0.4279, allocations: 0.5313 MB / 0.5502 GB, free: 12 MB / 398.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.965e-05/0.428, allocations: 60.67 kB / 0.5502 GB, free: 11.93 MB / 398.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009379/0.429, allocations: 417 kB / 0.5506 GB, free: 11.59 MB / 398.1 MB Notification: Performance of collectPreVariables (initialization): time 5.069e-05/0.429, allocations: 39.2 kB / 0.5507 GB, free: 11.54 MB / 398.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0001491/0.4292, allocations: 161.8 kB / 0.5508 GB, free: 11.39 MB / 398.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001044/0.4293, allocations: 86.77 kB / 0.5509 GB, free: 11.31 MB / 398.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001131/0.4294, allocations: 59.95 kB / 0.551 GB, free: 11.25 MB / 398.1 MB Notification: Performance of setup shared object (initialization): time 0.0001911/0.4296, allocations: 350.2 kB / 0.5513 GB, free: 10.91 MB / 398.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002612/0.4298, allocations: 114.9 kB / 0.5514 GB, free: 10.82 MB / 398.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002966/0.4301, allocations: 149.1 kB / 0.5516 GB, free: 10.69 MB / 398.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.002524/0.4326, allocations: 0.6646 MB / 0.5522 GB, free: 10.16 MB / 398.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.364e-06/0.4326, allocations: 0 / 0.5522 GB, free: 10.16 MB / 398.1 MB Notification: Performance of matching and sorting (n=39) (initialization): time 0.001048/0.4337, allocations: 459.9 kB / 0.5526 GB, free: 9.758 MB / 398.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.986e-05/0.4337, allocations: 4 kB / 0.5526 GB, free: 9.754 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.167e-05/0.4337, allocations: 7.938 kB / 0.5527 GB, free: 9.746 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002951/0.434, allocations: 71.19 kB / 0.5527 GB, free: 9.691 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002053/0.4342, allocations: 45.83 kB / 0.5528 GB, free: 9.652 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001975/0.4362, allocations: 1.645 MB / 0.5544 GB, free: 7.977 MB / 398.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004134/0.4366, allocations: 65.2 kB / 0.5544 GB, free: 7.93 MB / 398.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.242e-05/0.4366, allocations: 16.61 kB / 0.5544 GB, free: 7.914 MB / 398.1 MB Warning: Assuming fixed start value for the following 4 variables: Fn.x_scaled[1]:VARIABLE(fixed = true protected = true ) \"Scaled vector x\" type: Real [1] Cfb.x_scaled[1]:VARIABLE(fixed = true protected = true ) \"Scaled vector x\" type: Real [1] Process.x_scaled[2]:VARIABLE(fixed = true protected = true ) \"Scaled vector x\" type: Real [2] Process.x_scaled[1]:VARIABLE(fixed = true protected = true ) \"Scaled vector x\" type: Real [2] Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 2 * Number of states: 0 () * Number of discrete variables: 17 ($whenCondition1,globalSeed.id_impure,globalSeed.seed,noise.actualGlobalSeed,noise.localSeed,$PRE.noise.r_raw,$PRE.noise.r,$PRE.noise.state[4],$PRE.noise.state[3],$PRE.noise.state[2],$PRE.noise.state[1],noise.r_raw,noise.r,noise.state[4],noise.state[3],noise.state[2],noise.state[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (31): * Single equations (assignments): 29 * Array equations: 1 * 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): 1 system {(1,5,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0002619/0.4369, allocations: 171.5 kB / 0.5546 GB, free: 7.746 MB / 398.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 6.664e-05/0.437, allocations: 39.7 kB / 0.5546 GB, free: 7.707 MB / 398.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 8.767e-05/0.4371, allocations: 42.75 kB / 0.5547 GB, free: 7.664 MB / 398.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.025e-06/0.4371, allocations: 0.5625 kB / 0.5547 GB, free: 7.664 MB / 398.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.055e-06/0.4371, allocations: 4 kB / 0.5547 GB, free: 7.66 MB / 398.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.3e-06/0.4371, allocations: 4.984 kB / 0.5547 GB, free: 7.656 MB / 398.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0004367/0.4375, allocations: 312.1 kB / 0.555 GB, free: 7.367 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.595e-06/0.4375, allocations: 0.6562 kB / 0.555 GB, free: 7.367 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001692/0.4377, allocations: 23.89 kB / 0.555 GB, free: 7.348 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002513/0.4379, allocations: 78.61 kB / 0.5551 GB, free: 7.285 MB / 398.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.351e-05/0.438, allocations: 1.312 kB / 0.5551 GB, free: 7.285 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002078/0.44, allocations: 1.839 MB / 0.5569 GB, free: 5.434 MB / 398.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.492e-06/0.44, allocations: 0 / 0.5569 GB, free: 5.434 MB / 398.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001058/0.4411, allocations: 0.5022 MB / 0.5574 GB, free: 4.98 MB / 398.1 MB Notification: Performance of postOpt removeConstants (simulation): time 8.383e-05/0.4412, allocations: 54.42 kB / 0.5574 GB, free: 4.93 MB / 398.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 4.618e-05/0.4412, allocations: 10.16 kB / 0.5574 GB, free: 4.922 MB / 398.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003798/0.4416, allocations: 50.41 kB / 0.5575 GB, free: 4.891 MB / 398.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.03e-05/0.4417, allocations: 16.25 kB / 0.5575 GB, free: 4.883 MB / 398.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.909e-05/0.4417, allocations: 9.266 kB / 0.5575 GB, free: 4.875 MB / 398.1 MB Notification: Performance of sorting global known variables: time 0.0007511/0.4424, allocations: 315.6 kB / 0.5578 GB, free: 4.629 MB / 398.1 MB Notification: Performance of sort global known variables: time 7e-08/0.4424, allocations: 0 / 0.5578 GB, free: 4.629 MB / 398.1 MB Notification: Performance of remove unused functions: time 0.0007429/0.4432, allocations: 162.7 kB / 0.558 GB, free: 4.477 MB / 398.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (Process.x_scaled[1],Process.x_scaled[2],Cfb.x_scaled[1],Fn.x_scaled[1]) * Number of discrete variables: 7 ($whenCondition1,noise.state[1],noise.state[2],noise.state[3],noise.state[4],noise.r,noise.r_raw) * Number of discrete states: 4 (noise.state[1],noise.state[2],noise.state[3],noise.state[4]) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (16): * Single equations (assignments): 13 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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): 1 system {(1,5,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.002207/0.4454, allocations: 1.278 MB / 0.5592 GB, free: 3.27 MB / 398.1 MB Notification: Performance of simCode: created initialization part: time 0.0009256/0.4463, allocations: 405 kB / 0.5596 GB, free: 2.906 MB / 398.1 MB Notification: Performance of simCode: created event and clocks part: time 2.685e-06/0.4463, allocations: 0 / 0.5596 GB, free: 2.906 MB / 398.1 MB Notification: Performance of simCode: created simulation system equations: time 0.0005355/0.4469, allocations: 263.3 kB / 0.5599 GB, free: 2.652 MB / 398.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003416/0.4472, allocations: 57.97 kB / 0.5599 GB, free: 2.598 MB / 398.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.006366/0.4536, allocations: 3.507 MB / 0.5633 GB, free: 15 MB / 414.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004757/0.454, allocations: 0.7948 MB / 0.5641 GB, free: 14.18 MB / 414.1 MB Notification: Performance of simCode: alias equations: time 0.0001658/0.4542, allocations: 54.25 kB / 0.5642 GB, free: 14.12 MB / 414.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001613/0.4544, allocations: 91.34 kB / 0.5643 GB, free: 14.04 MB / 414.1 MB Notification: Performance of SimCode: time 9.11e-07/0.4544, allocations: 8 kB / 0.5643 GB, free: 14.03 MB / 414.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04054/0.4949, allocations: 9.018 MB / 0.5731 GB, free: 5.109 MB / 414.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 12.05/12.54, allocations: 14.5 kB / 0.5731 GB, free: 5.098 MB / 414.1 MB " [Timeout remaining time 647] (rm -f AES_AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise.pipe ; mkfifo AES_AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise.pipe ; head -c 1048576 < AES_AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise.pipe >> ../files/AES_AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_AES_AES_Coursework_Tuning_brushup_MSL_loop_2dof_noise_fmu --startTime=0 --stopTime=60 --stepSize=0.12 --timeout=50 --tolerance=1e-06 AES_AES_Coursework_Tuning_brushup_MSL_loop_2dof_noise.fmu > AES_AES.Coursework.Tuning_brushup.MSL_loop_2dof_noise.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 15.402428784873337] Failed to read output from testmodel.py, exit status != 0: 12.66108505986631 12.67957204 12.256414176 Calling exit ...