Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.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/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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(Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization") translateModel(Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001382/0.001382, allocations: 104.7 kB / 16.36 MB, free: 6.305 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001637/0.001637, allocations: 189.6 kB / 17.29 MB, free: 5.875 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.448/1.448, allocations: 205.1 MB / 223.2 MB, free: 12.24 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.767/1.767, allocations: 292.3 MB / 0.5496 GB, free: 17.44 MB / 462.1 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 0.00143/0.00143, allocations: 74.88 kB / 0.6729 GB, free: 5.828 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2524/0.2538, allocations: 114.6 MB / 0.7848 GB, free: 3.16 MB / 0.6544 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization): time 0.4211/0.675, allocations: 31.04 MB / 0.8151 GB, free: 30.44 MB / 0.6544 GB Notification: Performance of NFInst.instExpressions: time 0.01712/0.6921, allocations: 13.95 MB / 0.8287 GB, free: 20.87 MB / 0.6544 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001978/0.6942, allocations: 32.31 kB / 0.8287 GB, free: 20.85 MB / 0.6544 GB Notification: Performance of NFTyping.typeComponents: time 0.001366/0.6956, allocations: 401.2 kB / 0.8291 GB, free: 20.59 MB / 0.6544 GB Notification: Performance of NFTyping.typeBindings: time 0.003467/0.6991, allocations: 1.136 MB / 0.8302 GB, free: 19.93 MB / 0.6544 GB Notification: Performance of NFTyping.typeClassSections: time 0.002494/0.7016, allocations: 0.8495 MB / 0.8311 GB, free: 19.5 MB / 0.6544 GB Notification: Performance of NFFlatten.flatten: time 0.003152/0.7048, allocations: 2.057 MB / 0.8331 GB, free: 18.57 MB / 0.6544 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001203/0.706, allocations: 0.6738 MB / 0.8337 GB, free: 18.3 MB / 0.6544 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002441/0.7085, allocations: 0.9655 MB / 0.8347 GB, free: 17.86 MB / 0.6544 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001206/0.7097, allocations: 0.6648 MB / 0.8353 GB, free: 17.57 MB / 0.6544 GB Notification: Performance of NFPackage.collectConstants: time 0.0001371/0.7098, allocations: 62.8 kB / 0.8354 GB, free: 17.56 MB / 0.6544 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001653/0.7115, allocations: 0.6149 MB / 0.836 GB, free: 17.36 MB / 0.6544 GB Notification: Performance of NFScalarize.scalarize: time 0.0001995/0.7117, allocations: 164.7 kB / 0.8361 GB, free: 17.26 MB / 0.6544 GB Notification: Performance of NFVerifyModel.verify: time 0.0004934/0.7122, allocations: 422 kB / 0.8365 GB, free: 17.02 MB / 0.6544 GB Notification: Performance of NFConvertDAE.convert: time 0.001798/0.714, allocations: 1.094 MB / 0.8376 GB, free: 16.6 MB / 0.6544 GB Notification: Performance of FrontEnd - DAE generated: time 4.218e-06/0.714, allocations: 1.375 kB / 0.8376 GB, free: 16.6 MB / 0.6544 GB Notification: Performance of FrontEnd: time 2.134e-06/0.714, allocations: 0 / 0.8376 GB, free: 16.6 MB / 0.6544 GB Notification: Performance of Transformations before backend: time 2.47e-05/0.7141, allocations: 0 / 0.8376 GB, free: 16.6 MB / 0.6544 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 117 * Number of variables: 117 Notification: Performance of Generate backend data structure: time 0.001851/0.7159, allocations: 1.153 MB / 0.8387 GB, free: 15.77 MB / 0.6544 GB Notification: Performance of prepare preOptimizeDAE: time 4.39e-05/0.716, allocations: 12.84 kB / 0.8387 GB, free: 15.77 MB / 0.6544 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.000176/0.7162, allocations: 96.61 kB / 0.8388 GB, free: 15.72 MB / 0.6544 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009094/0.7171, allocations: 0.5813 MB / 0.8394 GB, free: 15.32 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.691e-05/0.7171, allocations: 43.41 kB / 0.8395 GB, free: 15.3 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 7.896e-05/0.7172, allocations: 53.06 kB / 0.8395 GB, free: 15.29 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007896/0.718, allocations: 412.3 kB / 0.8399 GB, free: 15.12 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.472e-05/0.718, allocations: 1.438 kB / 0.8399 GB, free: 15.12 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.762e-05/0.7181, allocations: 16.59 kB / 0.8399 GB, free: 15.11 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.256e-05/0.7181, allocations: 11.08 kB / 0.8399 GB, free: 15.11 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006109/0.7187, allocations: 299.6 kB / 0.8402 GB, free: 15.02 MB / 0.6544 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 0.002794/0.7215, allocations: 1.867 MB / 0.842 GB, free: 13.79 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0003865/0.7219, allocations: 162.9 kB / 0.8422 GB, free: 13.72 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001828/0.7221, allocations: 83.75 kB / 0.8423 GB, free: 13.69 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002281/0.7224, allocations: 341.1 kB / 0.8426 GB, free: 13.3 MB / 0.6544 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.797e-05/0.7224, allocations: 37.05 kB / 0.8426 GB, free: 13.26 MB / 0.6544 GB Notification: Performance of pre-optimization done (n=19): time 2.595e-06/0.7224, allocations: 1.969 kB / 0.8426 GB, free: 13.26 MB / 0.6544 GB Notification: Performance of matching and sorting (n=19): time 0.0008012/0.7232, allocations: 303.7 kB / 0.8429 GB, free: 13.14 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.748e-05/0.7232, allocations: 58.2 kB / 0.843 GB, free: 13.07 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007743/0.724, allocations: 0.673 MB / 0.8436 GB, free: 12.78 MB / 0.6544 GB Notification: Performance of collectPreVariables (initialization): time 3.164e-05/0.7241, allocations: 32.69 kB / 0.8437 GB, free: 12.75 MB / 0.6544 GB Notification: Performance of collectInitialEqns (initialization): time 0.000221/0.7243, allocations: 363.3 kB / 0.844 GB, free: 12.46 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 4.57e-05/0.7243, allocations: 65.16 kB / 0.8441 GB, free: 12.41 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001421/0.7245, allocations: 91.88 kB / 0.8442 GB, free: 12.36 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 0.0001052/0.7246, allocations: 382.5 kB / 0.8445 GB, free: 12.01 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002527/0.7249, allocations: 114.6 kB / 0.8446 GB, free: 11.97 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003103/0.7252, allocations: 181.9 kB / 0.8448 GB, free: 11.86 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004315/0.7256, allocations: 244.1 kB / 0.845 GB, free: 11.75 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.765e-06/0.7256, allocations: 1.062 kB / 0.845 GB, free: 11.75 MB / 0.6544 GB Notification: Performance of matching and sorting (n=45) (initialization): time 0.0007471/0.7264, allocations: 391.3 kB / 0.8454 GB, free: 11.59 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 1.983e-05/0.7264, allocations: 6.328 kB / 0.8454 GB, free: 11.59 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.486e-06/0.7264, allocations: 2.812 kB / 0.8454 GB, free: 11.59 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.005e-05/0.7265, allocations: 2.125 kB / 0.8454 GB, free: 11.59 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001033/0.7275, allocations: 161.8 kB / 0.8456 GB, free: 11.58 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009542/0.7285, allocations: 2.363 MB / 0.8479 GB, free: 9.203 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006398/0.7291, allocations: 57.8 kB / 0.8479 GB, free: 9.172 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.721e-05/0.7292, allocations: 16.58 kB / 0.848 GB, free: 9.168 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.000448/0.7296, allocations: 250.1 kB / 0.8482 GB, free: 9.023 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0003488/0.73, allocations: 172.2 kB / 0.8484 GB, free: 8.926 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0004711/0.7305, allocations: 237.5 kB / 0.8486 GB, free: 8.809 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.425e-06/0.7305, allocations: 2.109 kB / 0.8486 GB, free: 8.809 MB / 0.6544 GB Notification: Performance of matching and sorting (n=45) (initialization_lambda0): time 0.0007246/0.7312, allocations: 378.8 kB / 0.8489 GB, free: 8.652 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 1.403e-05/0.7312, allocations: 6.5 kB / 0.849 GB, free: 8.652 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.356e-06/0.7312, allocations: 1.875 kB / 0.849 GB, free: 8.652 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.722e-06/0.7313, allocations: 8.25 kB / 0.849 GB, free: 8.648 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004299/0.7317, allocations: 97.02 kB / 0.8491 GB, free: 8.645 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.571e-06/0.7317, allocations: 5.812 kB / 0.8491 GB, free: 8.641 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005076/0.7322, allocations: 42.83 kB / 0.8491 GB, free: 8.625 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.298e-05/0.7323, allocations: 16.77 kB / 0.8491 GB, free: 8.621 MB / 0.6544 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 3 * 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 initialization (45): * Single equations (assignments): 41 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 4 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 4 systems {1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0001276/0.7324, allocations: 194.2 kB / 0.8493 GB, free: 8.43 MB / 0.6544 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001012/0.7325, allocations: 72.25 kB / 0.8494 GB, free: 8.391 MB / 0.6544 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006775/0.7332, allocations: 312.1 kB / 0.8497 GB, free: 8.262 MB / 0.6544 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.109e-05/0.7332, allocations: 3.453 kB / 0.8497 GB, free: 8.262 MB / 0.6544 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.418e-06/0.7332, allocations: 0 / 0.8497 GB, free: 8.262 MB / 0.6544 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.31e-06/0.7332, allocations: 1.078 kB / 0.8497 GB, free: 8.262 MB / 0.6544 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00128/0.7345, allocations: 0.8846 MB / 0.8505 GB, free: 7.727 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.54e-06/0.7345, allocations: 1.375 kB / 0.8505 GB, free: 7.727 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003249/0.7349, allocations: 76.27 kB / 0.8506 GB, free: 7.719 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.691e-06/0.7349, allocations: 1.375 kB / 0.8506 GB, free: 7.719 MB / 0.6544 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.889e-05/0.7349, allocations: 10.95 kB / 0.8506 GB, free: 7.715 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0006329/0.7355, allocations: 2.356 MB / 0.8529 GB, free: 5.336 MB / 0.6544 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.078e-06/0.7355, allocations: 5.891 kB / 0.8529 GB, free: 5.332 MB / 0.6544 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.000556/0.7361, allocations: 400 kB / 0.8533 GB, free: 5.07 MB / 0.6544 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001898/0.7363, allocations: 163.9 kB / 0.8535 GB, free: 4.926 MB / 0.6544 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.742e-05/0.7364, allocations: 4.906 kB / 0.8535 GB, free: 4.926 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003188/0.7367, allocations: 19.62 kB / 0.8535 GB, free: 4.922 MB / 0.6544 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.031e-05/0.7368, allocations: 21.09 kB / 0.8535 GB, free: 4.914 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.026e-05/0.7368, allocations: 7.094 kB / 0.8535 GB, free: 4.914 MB / 0.6544 GB Notification: Performance of sorting global known variables: time 0.0005726/0.7374, allocations: 477.9 kB / 0.854 GB, free: 4.711 MB / 0.6544 GB Notification: Performance of sort global known variables: time 1.5e-07/0.7374, allocations: 0 / 0.854 GB, free: 4.711 MB / 0.6544 GB Notification: Performance of remove unused functions: time 0.001166/0.7386, allocations: 348.4 kB / 0.8543 GB, free: 4.641 MB / 0.6544 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * 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 (21): * Single equations (assignments): 15 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 4 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 4 systems {1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0005595/0.7391, allocations: 243 kB / 0.8545 GB, free: 4.512 MB / 0.6544 GB Notification: Performance of simCode: created initialization part: time 0.001652/0.7408, allocations: 0.4954 MB / 0.855 GB, free: 4.387 MB / 0.6544 GB Notification: Performance of simCode: created event and clocks part: time 3.557e-06/0.7408, allocations: 1.406 kB / 0.855 GB, free: 4.387 MB / 0.6544 GB Notification: Performance of simCode: created simulation system equations: time 0.0003883/0.7412, allocations: 132 kB / 0.8552 GB, free: 4.359 MB / 0.6544 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001529/0.7428, allocations: 348.4 kB / 0.8555 GB, free: 4.273 MB / 0.6544 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001706/0.7445, allocations: 1.129 MB / 0.8566 GB, free: 3.637 MB / 0.6544 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004359/0.7449, allocations: 0.9289 MB / 0.8575 GB, free: 2.918 MB / 0.6544 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001498/0.7451, allocations: 53.17 kB / 0.8575 GB, free: 2.906 MB / 0.6544 GB Notification: Performance of SimCode: time 7.41e-07/0.7451, allocations: 1.094 kB / 0.8575 GB, free: 2.906 MB / 0.6544 GB Notification: Performance of Templates: time 0.03007/0.7752, allocations: 21.98 MB / 0.879 GB, free: 8.445 MB / 0.67 GB make -j1 -f Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.makefile (rm -f Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.pipe ; mkfifo Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.pipe >> ../files/Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.sim & ./Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.Actuators.Valves.Validation.TwoWayValveParameterization.pipe 2>&1)