Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+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/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 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 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo) Running command: "" <> buildModelFMU(Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T,fileNamePrefix="Buildings_maint_7_0_x_Buildings_Fluid_HeatExchangers_Examples_WaterCooler_T",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T,fileNamePrefix="Buildings_maint_7_0_x_Buildings_Fluid_HeatExchangers_Examples_WaterCooler_T",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.377/1.377, allocations: 251.5 MB / 266.7 MB, free: 11.04 MB / 218.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001024/0.001024, allocations: 178.2 kB / 325.8 MB, free: 2.68 MB / 250.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.349/1.349, allocations: 205 MB / 0.576 GB, free: 20.97 MB / 426.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0006428/0.0006428, allocations: 92.06 kB / 0.6797 GB, free: 14.71 MB / 0.5105 GB Notification: Performance of FrontEnd - loaded program: time 0.0002964/0.0002964, allocations: 9.969 kB / 0.7932 GB, free: 136.5 MB / 0.6042 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1456/0.1459, allocations: 105.4 MB / 0.8962 GB, free: 68.08 MB / 0.6042 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T): time 0.03022/0.1762, allocations: 52.74 MB / 0.9477 GB, free: 15.15 MB / 0.6042 GB Notification: Performance of NFInst.instExpressions: time 0.0194/0.1956, allocations: 18.14 MB / 0.9654 GB, free: 12.96 MB / 0.6198 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002756/0.1984, allocations: 75.5 kB / 0.9655 GB, free: 12.89 MB / 0.6198 GB Notification: Performance of NFTyping.typeComponents: time 0.002551/0.201, allocations: 0.9865 MB / 0.9665 GB, free: 11.9 MB / 0.6198 GB Notification: Performance of NFTyping.typeBindings: time 0.004232/0.2052, allocations: 2.136 MB / 0.9685 GB, free: 9.758 MB / 0.6198 GB Notification: Performance of NFTyping.typeClassSections: time 0.006528/0.2118, allocations: 3.057 MB / 0.9715 GB, free: 6.723 MB / 0.6198 GB Notification: Performance of NFFlatten.flatten: time 0.005477/0.2172, allocations: 6.017 MB / 0.9774 GB, free: 0.6914 MB / 0.6198 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001534/0.2188, allocations: 1.353 MB / 0.9787 GB, free: 15.31 MB / 0.6355 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002179/0.221, allocations: 1.61 MB / 0.9803 GB, free: 13.69 MB / 0.6355 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001356/0.2223, allocations: 1.345 MB / 0.9816 GB, free: 12.34 MB / 0.6355 GB Notification: Performance of NFPackage.collectConstants: time 0.0002373/0.2226, allocations: 71.94 kB / 0.9817 GB, free: 12.27 MB / 0.6355 GB Notification: Performance of NFFlatten.collectFunctions: time 0.004452/0.2271, allocations: 1.805 MB / 0.9834 GB, free: 10.46 MB / 0.6355 GB Notification: Performance of NFScalarize.scalarize: time 0.0005307/0.2276, allocations: 438.1 kB / 0.9839 GB, free: 10.03 MB / 0.6355 GB Notification: Performance of NFVerifyModel.verify: time 0.001121/0.2288, allocations: 0.9203 MB / 0.9848 GB, free: 9.105 MB / 0.6355 GB Notification: Performance of NFConvertDAE.convert: time 0.003951/0.2327, allocations: 3.298 MB / 0.988 GB, free: 5.797 MB / 0.6355 GB Notification: Performance of FrontEnd - DAE generated: time 2.795e-06/0.2327, allocations: 0 / 0.988 GB, free: 5.797 MB / 0.6355 GB Notification: Performance of FrontEnd: time 1.293e-06/0.2327, allocations: 0 / 0.988 GB, free: 5.797 MB / 0.6355 GB Notification: Performance of Transformations before backend: time 1.916e-05/0.2328, allocations: 0 / 0.988 GB, free: 5.797 MB / 0.6355 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 282 * Number of variables: 282 Notification: Performance of Generate backend data structure: time 0.003075/0.2358, allocations: 2.216 MB / 0.9901 GB, free: 3.516 MB / 0.6355 GB Notification: Performance of prepare preOptimizeDAE: time 3.389e-05/0.2359, allocations: 8.031 kB / 0.9901 GB, free: 3.508 MB / 0.6355 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001772/0.2361, allocations: 173.2 kB / 0.9903 GB, free: 3.328 MB / 0.6355 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001859/0.2379, allocations: 493.3 kB / 0.9908 GB, free: 2.844 MB / 0.6355 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002549/0.2405, allocations: 1.644 MB / 0.9924 GB, free: 1.148 MB / 0.6355 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003422/0.2408, allocations: 162.2 kB / 0.9925 GB, free: 0.9883 MB / 0.6355 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001594/0.241, allocations: 120 kB / 0.9927 GB, free: 0.8711 MB / 0.6355 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002274/0.2433, allocations: 1.395 MB / 0.994 GB, free: 15.38 MB / 0.6511 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.777e-05/0.2433, allocations: 7.938 kB / 0.994 GB, free: 15.37 MB / 0.6511 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.752e-05/0.2434, allocations: 48 kB / 0.9941 GB, free: 15.32 MB / 0.6511 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.288e-05/0.2435, allocations: 28 kB / 0.9941 GB, free: 15.29 MB / 0.6511 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002331/0.2458, allocations: 1.136 MB / 0.9952 GB, free: 14.15 MB / 0.6511 GB 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 0.007099/0.2529, allocations: 7.01 MB / 1.002 GB, free: 6.602 MB / 0.6511 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002922/0.2559, allocations: 1.431 MB / 1.003 GB, free: 5.055 MB / 0.6511 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001407/0.2573, allocations: 442.2 kB / 1.004 GB, free: 4.617 MB / 0.6511 GB Notification: Performance of preOpt evalFunc (simulation): time 0.006019/0.2633, allocations: 3.071 MB / 1.007 GB, free: 1.207 MB / 0.6511 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001176/0.2645, allocations: 466.9 kB / 1.007 GB, free: 0.7383 MB / 0.6511 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0002908/0.2648, allocations: 95.23 kB / 1.007 GB, free: 0.6445 MB / 0.6511 GB Notification: Performance of pre-optimization done (n=60): time 2.144e-06/0.2648, allocations: 0 / 1.007 GB, free: 0.6445 MB / 0.6511 GB Notification: Performance of matching and sorting (n=60): time 0.002869/0.2677, allocations: 1.295 MB / 1.009 GB, free: 15.32 MB / 0.6667 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.117e-05/0.2678, allocations: 141.1 kB / 1.009 GB, free: 15.15 MB / 0.6667 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00166/0.2694, allocations: 1.586 MB / 1.01 GB, free: 13.57 MB / 0.6667 GB Notification: Performance of collectPreVariables (initialization): time 5.843e-05/0.2695, allocations: 37.7 kB / 1.01 GB, free: 13.52 MB / 0.6667 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006012/0.2701, allocations: 0.8919 MB / 1.011 GB, free: 12.62 MB / 0.6667 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001444/0.2703, allocations: 209 kB / 1.011 GB, free: 12.41 MB / 0.6667 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001038/0.2704, allocations: 93.66 kB / 1.012 GB, free: 12.32 MB / 0.6667 GB Notification: Performance of setup shared object (initialization): time 0.000103/0.2705, allocations: 345.9 kB / 1.012 GB, free: 11.97 MB / 0.6667 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000867/0.2714, allocations: 417.7 kB / 1.012 GB, free: 11.56 MB / 0.6667 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001107/0.2725, allocations: 0.8164 MB / 1.013 GB, free: 10.56 MB / 0.6667 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001914/0.2744, allocations: 1.182 MB / 1.014 GB, free: 9.227 MB / 0.6667 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.101e-06/0.2744, allocations: 4 kB / 1.014 GB, free: 9.223 MB / 0.6667 GB Notification: Performance of matching and sorting (n=125) (initialization): time 0.002434/0.2769, allocations: 1.376 MB / 1.016 GB, free: 7.832 MB / 0.6667 GB Notification: Performance of prepare postOptimizeDAE: time 0.0002203/0.2771, allocations: 441 kB / 1.016 GB, free: 7.238 MB / 0.6667 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.721e-05/0.2771, allocations: 12 kB / 1.016 GB, free: 7.227 MB / 0.6667 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.234e-05/0.2772, allocations: 19.94 kB / 1.016 GB, free: 7.207 MB / 0.6667 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009117/0.2781, allocations: 267.6 kB / 1.016 GB, free: 6.945 MB / 0.6667 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.202e-05/0.2781, allocations: 19.94 kB / 1.016 GB, free: 6.926 MB / 0.6667 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009961/0.2791, allocations: 144.4 kB / 1.016 GB, free: 6.785 MB / 0.6667 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.969e-05/0.2792, allocations: 51.98 kB / 1.016 GB, free: 6.734 MB / 0.6667 GB Notification: Performance of prepare postOptimizeDAE: time 5.43e-06/0.2792, allocations: 4 kB / 1.016 GB, free: 6.73 MB / 0.6667 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002128/0.2813, allocations: 1.169 MB / 1.018 GB, free: 5.555 MB / 0.6667 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.359e-05/0.2814, allocations: 12 kB / 1.018 GB, free: 5.543 MB / 0.6667 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.351e-05/0.2814, allocations: 16.59 kB / 1.018 GB, free: 5.527 MB / 0.6667 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008743/0.2823, allocations: 263.6 kB / 1.018 GB, free: 5.27 MB / 0.6667 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.99e-05/0.2823, allocations: 27.86 kB / 1.018 GB, free: 5.242 MB / 0.6667 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0008948/0.2832, allocations: 120.6 kB / 1.018 GB, free: 5.125 MB / 0.6667 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.344e-05/0.2833, allocations: 55.97 kB / 1.018 GB, free: 5.07 MB / 0.6667 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 48 * Number of states: 0 () * Number of discrete variables: 6 (TSet.count,$PRE.TSet.count,TSet.T_start,$PRE.TSet.T_start,$whenCondition1,conPI.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (121): * Single equations (assignments): 117 * Array equations: 2 * Algorithm blocks: 1 * Record equations: 1 * 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 0.0005242/0.2838, allocations: 489.3 kB / 1.019 GB, free: 4.582 MB / 0.6667 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001888/0.284, allocations: 169.8 kB / 1.019 GB, free: 4.414 MB / 0.6667 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002324/0.2863, allocations: 1.163 MB / 1.02 GB, free: 3.238 MB / 0.6667 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.183e-05/0.2864, allocations: 8 kB / 1.02 GB, free: 3.23 MB / 0.6667 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.724e-06/0.2864, allocations: 3.938 kB / 1.02 GB, free: 3.227 MB / 0.6667 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001761/0.2881, allocations: 1.009 MB / 1.021 GB, free: 2.164 MB / 0.6667 GB 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 postOpt removeSimpleEquations (simulation): time 0.003596/0.2917, allocations: 2.449 MB / 1.023 GB, free: 15.65 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.256e-06/0.2918, allocations: 0 / 1.023 GB, free: 15.65 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006555/0.2924, allocations: 159.8 kB / 1.023 GB, free: 15.5 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.000146/0.2926, allocations: 32.84 kB / 1.023 GB, free: 15.46 MB / 0.6823 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.814e-05/0.2926, allocations: 19.98 kB / 1.023 GB, free: 15.44 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001019/0.2937, allocations: 1.378 MB / 1.025 GB, free: 13.93 MB / 0.6823 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.372e-06/0.2937, allocations: 4.062 kB / 1.025 GB, free: 13.93 MB / 0.6823 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004588/0.2983, allocations: 1.627 MB / 1.026 GB, free: 12.27 MB / 0.6823 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006842/0.299, allocations: 342.6 kB / 1.027 GB, free: 11.91 MB / 0.6823 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003315/0.2993, allocations: 15.98 kB / 1.027 GB, free: 11.89 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00145/0.3008, allocations: 115.9 kB / 1.027 GB, free: 11.78 MB / 0.6823 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001435/0.3009, allocations: 48.48 kB / 1.027 GB, free: 11.73 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.727e-05/0.301, allocations: 23.98 kB / 1.027 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of sorting global known variables: time 0.002091/0.3031, allocations: 1.129 MB / 1.028 GB, free: 10.56 MB / 0.6823 GB Notification: Performance of sort global known variables: time 3.5e-07/0.3032, allocations: 4 kB / 1.028 GB, free: 10.55 MB / 0.6823 GB Notification: Performance of remove unused functions: time 0.002501/0.3057, allocations: 0.9162 MB / 1.029 GB, free: 9.637 MB / 0.6823 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 6 (vol.dynBal.U,mov.filter.x[1],mov.filter.x[2],conPI.I.y,THeaOut.T,coo.outCon.T) * Number of discrete variables: 3 ($whenCondition1,TSet.T_start,TSet.count) * Number of discrete states: 1 (TSet.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (69): * Single equations (assignments): 60 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * 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 {(1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.004516/0.3102, allocations: 2.828 MB / 1.032 GB, free: 6.902 MB / 0.6823 GB Notification: Performance of simCode: created initialization part: time 0.003117/0.3133, allocations: 1.738 MB / 1.033 GB, free: 5.129 MB / 0.6823 GB Notification: Performance of simCode: created event and clocks part: time 4.197e-06/0.3133, allocations: 4 kB / 1.033 GB, free: 5.125 MB / 0.6823 GB Notification: Performance of simCode: created simulation system equations: time 0.001096/0.3144, allocations: 0.5762 MB / 1.034 GB, free: 4.535 MB / 0.6823 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002837/0.3173, allocations: 0.7518 MB / 1.035 GB, free: 3.789 MB / 0.6823 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01992/0.3372, allocations: 14.03 MB / 1.048 GB, free: 4.77 MB / 0.698 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007885/0.338, allocations: 1.364 MB / 1.05 GB, free: 3.375 MB / 0.698 GB Notification: Performance of simCode: alias equations: time 0.001492/0.3395, allocations: 418.3 kB / 1.05 GB, free: 2.961 MB / 0.698 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007909/0.3403, allocations: 0.7258 MB / 1.051 GB, free: 2.234 MB / 0.698 GB Notification: Performance of SimCode: time 1.964e-06/0.3403, allocations: 0 / 1.051 GB, free: 2.234 MB / 0.698 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.5502/0.8906, allocations: 45.13 MB / 1.095 GB, free: 126.1 MB / 0.698 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001471/0.8908, allocations: 287.9 kB / 1.095 GB, free: 125.7 MB / 0.698 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.647/4.538, allocations: 3.375 kB / 1.095 GB, free: 125.7 MB / 0.698 GB (rm -f Buildings_maint.7.0.x_Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_maint_7_0_x_Buildings_Fluid_HeatExchangers_Examples_WaterCooler_T_fmu --startTime=0 --stopTime=172800 --timeout=50 --tolerance=1e-08 Buildings_maint_7_0_x_Buildings_Fluid_HeatExchangers_Examples_WaterCooler_T.fmu > Buildings_maint.7.0.x_Buildings.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe 2>&1)