Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo", uses=false) 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 3.0.0/package.mo", uses=false) Using package Buildings with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 3.0.0/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) Using package Modelica_StateGraph2 with version 2.0.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo) Running command: translateModel(Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox") translateModel(Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox") [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo:257:38-257:110:writable] Warning: The file was not encoded in UTF-8: "

An important practical aspect of state machines is the abilit...". Defaulting to 7-bit ASCII with unknown characters replaced by '?'. To change encoding when loading a file: loadFile(encoding="ISO-XXXX-YY"). To change it in a package: add a file package.encoding at the top-level. Note: The Modelica Language Specification only allows files encoded in UTF-8. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo:761:36-761:108:writable] Warning: The file was not encoded in UTF-8: "

The Modelica_StateGraph2 library is described in detail in (O...". Defaulting to 7-bit ASCII with unknown characters replaced by '?'. To change encoding when loading a file: loadFile(encoding="ISO-XXXX-YY"). To change it in a package: add a file package.encoding at the top-level. Note: The Modelica Language Specification only allows files encoded in UTF-8. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_StateGraph2 2.0.2/package.mo:1435:36-1435:108:writable] Warning: The file was not encoded in UTF-8: "

Main Authors:

SCode: time 0.1442/0.1462, allocations: 80.84 MB / 0.6706 GB, free: 2.047 MB / 0.4981 GB Notification: Performance of NFInst.instantiate(Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox): time 0.005606/0.1519, allocations: 4.098 MB / 0.6746 GB, free: 13.92 MB / 0.5137 GB Notification: Performance of NFInst.instExpressions: time 0.00339/0.1553, allocations: 1.711 MB / 0.6763 GB, free: 12.2 MB / 0.5137 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0007036/0.1561, allocations: 27.88 kB / 0.6763 GB, free: 12.17 MB / 0.5137 GB Notification: Performance of NFTyping.typeComponents: time 0.0004205/0.1565, allocations: 130.5 kB / 0.6764 GB, free: 12.04 MB / 0.5137 GB Notification: Performance of NFTyping.typeBindings: time 0.0008104/0.1573, allocations: 218.3 kB / 0.6766 GB, free: 11.83 MB / 0.5137 GB Notification: Performance of NFTyping.typeClassSections: time 0.001101/0.1584, allocations: 0.5439 MB / 0.6772 GB, free: 11.29 MB / 0.5137 GB Notification: Performance of NFFlatten.flatten: time 0.001332/0.1598, allocations: 1.074 MB / 0.6782 GB, free: 10.21 MB / 0.5137 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0007528/0.1605, allocations: 442.2 kB / 0.6786 GB, free: 9.754 MB / 0.5137 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0005771/0.1611, allocations: 374.4 kB / 0.679 GB, free: 9.387 MB / 0.5137 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0005918/0.1617, allocations: 393.9 kB / 0.6794 GB, free: 9 MB / 0.5137 GB Notification: Performance of NFPackage.collectConstants: time 0.0002223/0.162, allocations: 104 kB / 0.6795 GB, free: 8.898 MB / 0.5137 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003138/0.1623, allocations: 152 kB / 0.6796 GB, free: 8.75 MB / 0.5137 GB Notification: Performance of NFScalarize.scalarize: time 0.0002218/0.1625, allocations: 211.2 kB / 0.6798 GB, free: 8.543 MB / 0.5137 GB Notification: Performance of NFVerifyModel.verify: time 0.000467/0.163, allocations: 433.6 kB / 0.6802 GB, free: 8.117 MB / 0.5137 GB Notification: Performance of NFConvertDAE.convert: time 0.001211/0.1642, allocations: 1.195 MB / 0.6814 GB, free: 6.918 MB / 0.5137 GB Notification: Performance of FrontEnd - DAE generated: time 4.87e-06/0.1642, allocations: 0 / 0.6814 GB, free: 6.918 MB / 0.5137 GB Notification: Performance of FrontEnd: time 1.924e-06/0.1642, allocations: 0 / 0.6814 GB, free: 6.918 MB / 0.5137 GB Notification: Performance of Transformations before backend: time 3.474e-05/0.1643, allocations: 0 / 0.6814 GB, free: 6.918 MB / 0.5137 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 137 * Number of variables: 137 Notification: Performance of Generate backend data structure: time 0.002716/0.167, allocations: 1.288 MB / 0.6827 GB, free: 5.562 MB / 0.5137 GB Notification: Performance of prepare preOptimizeDAE: time 4.354e-05/0.167, allocations: 8.031 kB / 0.6827 GB, free: 5.555 MB / 0.5137 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001028/0.1681, allocations: 191.6 kB / 0.6828 GB, free: 5.367 MB / 0.5137 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009702/0.1691, allocations: 0.6832 MB / 0.6835 GB, free: 4.641 MB / 0.5137 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.767e-05/0.1691, allocations: 45.69 kB / 0.6836 GB, free: 4.598 MB / 0.5137 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001004/0.1692, allocations: 56.12 kB / 0.6836 GB, free: 4.543 MB / 0.5137 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001691/0.1709, allocations: 0.7825 MB / 0.6844 GB, free: 3.723 MB / 0.5137 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.491e-05/0.1709, allocations: 0 / 0.6844 GB, free: 3.723 MB / 0.5137 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.197e-05/0.171, allocations: 27.94 kB / 0.6844 GB, free: 3.695 MB / 0.5137 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.258e-05/0.171, allocations: 12 kB / 0.6844 GB, free: 3.684 MB / 0.5137 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002041/0.1731, allocations: 0.7116 MB / 0.6851 GB, free: 2.973 MB / 0.5137 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.003183/0.1763, allocations: 2.366 MB / 0.6874 GB, free: 0.5234 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002301/0.1786, allocations: 0.8081 MB / 0.6882 GB, free: 15.71 MB / 0.5294 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0009801/0.1796, allocations: 341.4 kB / 0.6885 GB, free: 15.37 MB / 0.5294 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0006643/0.1803, allocations: 445.9 kB / 0.689 GB, free: 14.84 MB / 0.5294 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001168/0.1814, allocations: 433 kB / 0.6894 GB, free: 14.41 MB / 0.5294 GB Notification: Performance of pre-optimization done (n=47): time 2.084e-06/0.1814, allocations: 4 kB / 0.6894 GB, free: 14.41 MB / 0.5294 GB Notification: Performance of matching and sorting (n=47): time 0.003028/0.1845, allocations: 1.021 MB / 0.6904 GB, free: 13.38 MB / 0.5294 GB Notification: Performance of inlineWhenForInitialization (initialization): time 7.772e-05/0.1846, allocations: 133 kB / 0.6905 GB, free: 13.22 MB / 0.5294 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007691/0.1853, allocations: 0.6843 MB / 0.6912 GB, free: 12.52 MB / 0.5294 GB Notification: Performance of collectPreVariables (initialization): time 5.26e-05/0.1854, allocations: 33.7 kB / 0.6912 GB, free: 12.48 MB / 0.5294 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002679/0.1857, allocations: 368.9 kB / 0.6916 GB, free: 12.12 MB / 0.5294 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001312/0.1858, allocations: 157.8 kB / 0.6917 GB, free: 11.96 MB / 0.5294 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001697/0.186, allocations: 98.22 kB / 0.6918 GB, free: 11.86 MB / 0.5294 GB Notification: Performance of setup shared object (initialization): time 0.0001077/0.1861, allocations: 322 kB / 0.6921 GB, free: 11.54 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009561/0.1871, allocations: 322.9 kB / 0.6924 GB, free: 11.22 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001135/0.1882, allocations: 418.3 kB / 0.6928 GB, free: 10.78 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001913/0.1901, allocations: 0.7048 MB / 0.6935 GB, free: 10.04 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.725e-06/0.1902, allocations: 0 / 0.6935 GB, free: 10.04 MB / 0.5294 GB Notification: Performance of matching and sorting (n=60) (initialization): time 0.002151/0.1923, allocations: 0.8847 MB / 0.6944 GB, free: 9.133 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 5.522e-05/0.1924, allocations: 63.39 kB / 0.6944 GB, free: 9.059 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.814e-06/0.1924, allocations: 1.203 kB / 0.6944 GB, free: 9.059 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.164e-05/0.1924, allocations: 8.125 kB / 0.6944 GB, free: 9.051 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007036/0.1931, allocations: 139.8 kB / 0.6946 GB, free: 8.914 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.374e-05/0.1931, allocations: 7.938 kB / 0.6946 GB, free: 8.906 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006661/0.1938, allocations: 111.4 kB / 0.6947 GB, free: 8.797 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.09e-05/0.1939, allocations: 20 kB / 0.6947 GB, free: 8.777 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.00106/0.1949, allocations: 437.7 kB / 0.6951 GB, free: 8.344 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008908/0.1958, allocations: 378.4 kB / 0.6955 GB, free: 7.945 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001566/0.1974, allocations: 0.6423 MB / 0.6961 GB, free: 7.27 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.355e-06/0.1974, allocations: 0 / 0.6961 GB, free: 7.27 MB / 0.5294 GB Notification: Performance of matching and sorting (n=60) (initialization_lambda0): time 0.0019/0.1993, allocations: 0.7989 MB / 0.6969 GB, free: 6.453 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 4.287e-05/0.1994, allocations: 67.33 kB / 0.6969 GB, free: 6.375 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.581e-06/0.1994, allocations: 4 kB / 0.697 GB, free: 6.371 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.494e-06/0.1994, allocations: 4 kB / 0.697 GB, free: 6.367 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006352/0.2001, allocations: 123.8 kB / 0.6971 GB, free: 6.246 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.026e-05/0.2001, allocations: 12.06 kB / 0.6971 GB, free: 6.234 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006274/0.2007, allocations: 91.59 kB / 0.6972 GB, free: 6.145 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.324e-05/0.2008, allocations: 20 kB / 0.6972 GB, free: 6.125 MB / 0.5294 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 7 * Number of states: 0 () * Number of discrete variables: 13 (m_flow.count,$PRE.m_flow.count,m_flow.T_start,$PRE.m_flow.T_start,TRoo.count,$PRE.TRoo.count,TRoo.T_start,$PRE.TRoo.T_start,$whenCondition1,$whenCondition2,conMix.conFloRat.I.local_reset,conMix.conCoo.I.local_reset,conMix.conHea.I.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (58): * Single equations (assignments): 56 * Array equations: 0 * Algorithm blocks: 2 * 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 0.0002129/0.201, allocations: 208.1 kB / 0.6974 GB, free: 5.914 MB / 0.5294 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001223/0.2011, allocations: 82.97 kB / 0.6975 GB, free: 5.832 MB / 0.5294 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002184/0.2033, allocations: 0.7773 MB / 0.6982 GB, free: 5.047 MB / 0.5294 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.532e-05/0.2033, allocations: 11.92 kB / 0.6982 GB, free: 5.035 MB / 0.5294 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.12e-06/0.2033, allocations: 4 kB / 0.6982 GB, free: 5.031 MB / 0.5294 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.302e-06/0.2034, allocations: 0 / 0.6982 GB, free: 5.031 MB / 0.5294 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0008955/0.2043, allocations: 0.7789 MB / 0.699 GB, free: 4.203 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.212e-06/0.2043, allocations: 0 / 0.699 GB, free: 4.203 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007042/0.205, allocations: 123.8 kB / 0.6991 GB, free: 4.082 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.144e-06/0.205, allocations: 0 / 0.6991 GB, free: 4.082 MB / 0.5294 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.388e-05/0.205, allocations: 11.98 kB / 0.6991 GB, free: 4.07 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.769e-06/0.2051, allocations: 7.938 kB / 0.6991 GB, free: 4.062 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.803e-06/0.2051, allocations: 4 kB / 0.6991 GB, free: 4.059 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003124/0.2082, allocations: 1.167 MB / 0.7003 GB, free: 2.871 MB / 0.5294 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002892/0.2085, allocations: 227.9 kB / 0.7005 GB, free: 2.629 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001061/0.2086, allocations: 12 kB / 0.7005 GB, free: 2.617 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006221/0.2092, allocations: 79.83 kB / 0.7006 GB, free: 2.539 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001259/0.2094, allocations: 48.38 kB / 0.7006 GB, free: 2.492 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.508e-05/0.2094, allocations: 12 kB / 0.7006 GB, free: 2.48 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.0005935/0.21, allocations: 479 kB / 0.7011 GB, free: 2.016 MB / 0.5294 GB Notification: Performance of sort global known variables: time 5.01e-07/0.21, allocations: 0 / 0.7011 GB, free: 2.016 MB / 0.5294 GB Notification: Performance of remove unused functions: time 0.0007019/0.2107, allocations: 247.4 kB / 0.7013 GB, free: 1.773 MB / 0.5294 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 3 (conMix.conHea.I.y,conMix.conCoo.I.y,conMix.conFloRat.I.y) * Number of discrete variables: 6 ($whenCondition2,$whenCondition1,TRoo.T_start,TRoo.count,m_flow.T_start,m_flow.count) * Number of discrete states: 2 (TRoo.count,m_flow.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (47): * Single equations (assignments): 43 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 4 * 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 0.0002447/0.211, allocations: 131.4 kB / 0.7015 GB, free: 1.637 MB / 0.5294 GB Notification: Performance of simCode: created initialization part: time 0.00319/0.2142, allocations: 1.274 MB / 0.7027 GB, free: 320 kB / 0.5294 GB Notification: Performance of simCode: created event and clocks part: time 2.695e-06/0.2142, allocations: 0 / 0.7027 GB, free: 320 kB / 0.5294 GB Notification: Performance of simCode: created simulation system equations: time 0.001023/0.2152, allocations: 362.2 kB / 0.7031 GB, free: 15.96 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0009057/0.2161, allocations: 191.5 kB / 0.7032 GB, free: 15.78 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00258/0.2187, allocations: 1.291 MB / 0.7045 GB, free: 14.46 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004713/0.2192, allocations: 0.926 MB / 0.7054 GB, free: 13.51 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.0004586/0.2197, allocations: 92.95 kB / 0.7055 GB, free: 13.41 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002041/0.2199, allocations: 59.36 kB / 0.7055 GB, free: 13.36 MB / 0.545 GB Notification: Performance of SimCode: time 5.91e-07/0.2199, allocations: 0 / 0.7055 GB, free: 13.36 MB / 0.545 GB Notification: Performance of Templates: time 0.01738/0.2373, allocations: 9.803 MB / 0.7151 GB, free: 3.629 MB / 0.545 GB make -j1 -f Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.makefile (rm -f Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.pipe ; mkfifo Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.pipe ; head -c 1048576 < Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.pipe >> ../files/Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.sim & ./Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_3.0.0_Buildings.Examples.DualFanDualDuct.Controls.Examples.RoomMixingBox.pipe 2>&1)