Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001628/0.001628, allocations: 110 kB / 18.94 MB, free: 2.789 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001636/0.001636, allocations: 192.7 kB / 22.23 MB, free: 5.23 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.38/1.38, allocations: 225.6 MB / 251 MB, free: 13 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002525/0.002525, allocations: 286.6 kB / 306.6 MB, free: 8.34 MB / 238.1 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 1.193/1.193, allocations: 180.9 MB / 0.53 GB, free: 14.32 MB / 382.1 MB " [Timeout remaining time 179] Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+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(BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth") translateModel(BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 0.002793/0.002793, allocations: 103.2 kB / 0.7308 GB, free: 38.76 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1411/0.1439, allocations: 94.19 MB / 0.8228 GB, free: 1.82 MB / 0.5606 GB Notification: Performance of NFInst.instantiate(BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth): time 0.007189/0.151, allocations: 5.055 MB / 0.8278 GB, free: 12.74 MB / 0.5762 GB Notification: Performance of NFInst.instExpressions: time 0.1953/0.3464, allocations: 151.3 MB / 0.9755 GB, free: 4.809 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0009182/0.3473, allocations: 23.81 kB / 0.9756 GB, free: 4.785 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.0008122/0.3481, allocations: 206.1 kB / 0.9758 GB, free: 4.582 MB / 0.7169 GB Notification: Performance of NFTyping.typeBindings: time 0.002176/0.3503, allocations: 0.5642 MB / 0.9763 GB, free: 4.02 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.002457/0.3527, allocations: 0.9164 MB / 0.9772 GB, free: 3.109 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.002118/0.3548, allocations: 1.471 MB / 0.9786 GB, free: 1.633 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0009418/0.3558, allocations: 421.5 kB / 0.979 GB, free: 1.199 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00091/0.3567, allocations: 0.5334 MB / 0.9796 GB, free: 0.6641 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0009073/0.3576, allocations: 0.5445 MB / 0.9801 GB, free: 120 kB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0002796/0.3579, allocations: 124 kB / 0.9802 GB, free: 15.99 MB / 0.7325 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001111/0.359, allocations: 0.5074 MB / 0.9807 GB, free: 15.49 MB / 0.7325 GB Notification: Performance of NFScalarize.scalarize: time 0.0003649/0.3594, allocations: 311 kB / 0.981 GB, free: 15.18 MB / 0.7325 GB Notification: Performance of NFVerifyModel.verify: time 0.0007538/0.3601, allocations: 0.5868 MB / 0.9816 GB, free: 14.59 MB / 0.7325 GB Notification: Performance of NFConvertDAE.convert: time 0.002413/0.3625, allocations: 1.728 MB / 0.9833 GB, free: 12.86 MB / 0.7325 GB Notification: Performance of FrontEnd - DAE generated: time 4.118e-06/0.3625, allocations: 0 / 0.9833 GB, free: 12.86 MB / 0.7325 GB Notification: Performance of FrontEnd: time 1.173e-06/0.3625, allocations: 0 / 0.9833 GB, free: 12.86 MB / 0.7325 GB Notification: Performance of Transformations before backend: time 4.456e-05/0.3626, allocations: 3.984 kB / 0.9833 GB, free: 12.86 MB / 0.7325 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 226 * Number of variables: 226 Notification: Performance of Generate backend data structure: time 0.003073/0.3657, allocations: 1.464 MB / 0.9847 GB, free: 11.35 MB / 0.7325 GB Notification: Performance of prepare preOptimizeDAE: time 3.96e-05/0.3657, allocations: 12.62 kB / 0.9847 GB, free: 11.34 MB / 0.7325 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0009762/0.3667, allocations: 192 kB / 0.9849 GB, free: 11.15 MB / 0.7325 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00134/0.368, allocations: 0.7259 MB / 0.9856 GB, free: 10.39 MB / 0.7325 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.967e-05/0.3681, allocations: 73.98 kB / 0.9857 GB, free: 10.32 MB / 0.7325 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001404/0.3682, allocations: 88 kB / 0.9858 GB, free: 10.24 MB / 0.7325 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001838/0.3701, allocations: 0.9769 MB / 0.9867 GB, free: 9.219 MB / 0.7325 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.228e-05/0.3701, allocations: 0 / 0.9867 GB, free: 9.219 MB / 0.7325 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.681e-05/0.3702, allocations: 36 kB / 0.9868 GB, free: 9.184 MB / 0.7325 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.176e-05/0.3702, allocations: 23.94 kB / 0.9868 GB, free: 9.16 MB / 0.7325 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002092/0.3723, allocations: 1.163 MB / 0.9879 GB, free: 8 MB / 0.7325 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 0.004713/0.377, allocations: 2.83 MB / 0.9907 GB, free: 5.055 MB / 0.7325 GB Notification: Performance of preOpt comSubExp (simulation): time 0.00222/0.3792, allocations: 0.8652 MB / 0.9915 GB, free: 4.184 MB / 0.7325 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006488/0.3799, allocations: 298.7 kB / 0.9918 GB, free: 3.891 MB / 0.7325 GB Notification: Performance of preOpt evalFunc (simulation): time 9.217e-05/0.38, allocations: 36.59 kB / 0.9918 GB, free: 3.852 MB / 0.7325 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001021/0.381, allocations: 0.5374 MB / 0.9924 GB, free: 3.297 MB / 0.7325 GB Notification: Performance of pre-optimization done (n=88): time 2.134e-06/0.381, allocations: 0 / 0.9924 GB, free: 3.297 MB / 0.7325 GB Notification: Performance of matching and sorting (n=88): time 0.003578/0.3846, allocations: 1.231 MB / 0.9936 GB, free: 2.059 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001226/0.3847, allocations: 188.9 kB / 0.9937 GB, free: 1.832 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008732/0.3856, allocations: 0.6567 MB / 0.9944 GB, free: 1.168 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 7.503e-05/0.3856, allocations: 41.7 kB / 0.9944 GB, free: 1.121 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003465/0.386, allocations: 413.2 kB / 0.9948 GB, free: 0.7109 MB / 0.7325 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002614/0.3862, allocations: 297.5 kB / 0.9951 GB, free: 428 kB / 0.7325 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000298/0.3865, allocations: 182.5 kB / 0.9953 GB, free: 240 kB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 0.0002307/0.3868, allocations: 394.7 kB / 0.9957 GB, free: 15.84 MB / 0.7481 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006571/0.3874, allocations: 293.8 kB / 0.9959 GB, free: 15.55 MB / 0.7481 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008698/0.3883, allocations: 387.1 kB / 0.9963 GB, free: 15.16 MB / 0.7481 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001384/0.3897, allocations: 0.6516 MB / 0.9969 GB, free: 14.5 MB / 0.7481 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.015e-06/0.3897, allocations: 0 / 0.9969 GB, free: 14.5 MB / 0.7481 GB Notification: Performance of matching and sorting (n=106) (initialization): time 0.002242/0.3919, allocations: 0.9156 MB / 0.9978 GB, free: 13.57 MB / 0.7481 GB Notification: Performance of prepare postOptimizeDAE: time 1.824e-05/0.3919, allocations: 5.875 kB / 0.9978 GB, free: 13.57 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.001e-05/0.392, allocations: 8 kB / 0.9978 GB, free: 13.56 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006174/0.3926, allocations: 84.83 kB / 0.9979 GB, free: 13.47 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007556/0.3933, allocations: 171.7 kB / 0.9981 GB, free: 13.3 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00221/0.3955, allocations: 1.529 MB / 0.9996 GB, free: 11.66 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007987/0.3963, allocations: 111.5 kB / 0.9997 GB, free: 11.55 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.153e-05/0.3964, allocations: 43.91 kB / 0.9997 GB, free: 11.51 MB / 0.7481 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 4 * Number of states: 0 () * Number of discrete variables: 21 (weaDat.conTim.canRepeatWeatherFile,weaDat.conTimMin.canRepeatWeatherFile,solAzi.outsidePolarCircle,weaDat.decAng.tNext,$PRE.weaDat.decAng.tNext,weaDat.eqnTim.tNext,$PRE.weaDat.eqnTim.tNext,weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,weaDat.locTim.tNext,$PRE.weaDat.locTim.tNext,decAng.tNext,$PRE.decAng.tNext,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (104): * Single equations (assignments): 103 * Array equations: 0 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,2)} Notification: Performance of prepare postOptimizeDAE: time 0.0004105/0.3968, allocations: 271.7 kB / 1 GB, free: 11.23 MB / 0.7481 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000176/0.397, allocations: 91.44 kB / 1 GB, free: 11.14 MB / 0.7481 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002827/0.3998, allocations: 1.191 MB / 1.001 GB, free: 9.934 MB / 0.7481 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.523e-05/0.3998, allocations: 15.98 kB / 1.001 GB, free: 9.918 MB / 0.7481 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.254e-06/0.3999, allocations: 0 / 1.001 GB, free: 9.918 MB / 0.7481 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.099e-05/0.3999, allocations: 3.984 kB / 1.001 GB, free: 9.914 MB / 0.7481 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003683/0.4035, allocations: 2.071 MB / 1.003 GB, free: 7.789 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.27e-06/0.4035, allocations: 7.938 kB / 1.003 GB, free: 7.781 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006826/0.4042, allocations: 167.8 kB / 1.003 GB, free: 7.617 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004489/0.4047, allocations: 76.72 kB / 1.004 GB, free: 7.539 MB / 0.7481 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.085e-05/0.4047, allocations: 27.98 kB / 1.004 GB, free: 7.512 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002013/0.4068, allocations: 1.551 MB / 1.005 GB, free: 5.844 MB / 0.7481 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 8.51e-07/0.4068, allocations: 0 / 1.005 GB, free: 5.844 MB / 0.7481 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002312/0.4091, allocations: 1.092 MB / 1.006 GB, free: 4.734 MB / 0.7481 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004226/0.4095, allocations: 219 kB / 1.006 GB, free: 4.52 MB / 0.7481 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001301/0.4096, allocations: 24 kB / 1.006 GB, free: 4.496 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007458/0.4104, allocations: 67.92 kB / 1.006 GB, free: 4.43 MB / 0.7481 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001676/0.4105, allocations: 88.78 kB / 1.007 GB, free: 4.344 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.189e-05/0.4106, allocations: 39.97 kB / 1.007 GB, free: 4.305 MB / 0.7481 GB Notification: Performance of sorting global known variables: time 0.0006277/0.4112, allocations: 475 kB / 1.007 GB, free: 3.844 MB / 0.7481 GB Notification: Performance of sort global known variables: time 1e-07/0.4112, allocations: 0 / 1.007 GB, free: 3.844 MB / 0.7481 GB Notification: Performance of remove unused functions: time 0.0009085/0.4122, allocations: 359.1 kB / 1.007 GB, free: 3.492 MB / 0.7481 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 12 ($whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,decAng.tNext,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext) * Number of discrete states: 6 (decAng.tNext,weaDat.locTim.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext,weaDat.conTimMin.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (106): * Single equations (assignments): 99 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 6 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001969/0.4141, allocations: 0.6232 MB / 1.008 GB, free: 3.043 MB / 0.7481 GB Notification: Performance of simCode: created initialization part: time 0.00191/0.416, allocations: 0.8781 MB / 1.009 GB, free: 2.148 MB / 0.7481 GB Notification: Performance of simCode: created event and clocks part: time 2.415e-06/0.416, allocations: 0 / 1.009 GB, free: 2.148 MB / 0.7481 GB Notification: Performance of simCode: created simulation system equations: time 0.001065/0.4171, allocations: 0.5235 MB / 1.009 GB, free: 1.613 MB / 0.7481 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001305/0.4184, allocations: 316 kB / 1.01 GB, free: 1.332 MB / 0.7481 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.37/0.7884, allocations: 1.77 MB / 1.011 GB, free: 37.04 MB / 0.7481 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000414/0.7889, allocations: 1.045 MB / 1.012 GB, free: 36.33 MB / 0.7481 GB Notification: Performance of simCode: alias equations: time 0.0009023/0.7898, allocations: 276.9 kB / 1.013 GB, free: 36.32 MB / 0.7481 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002708/0.79, allocations: 121.5 kB / 1.013 GB, free: 36.31 MB / 0.7481 GB Notification: Performance of SimCode: time 9.12e-07/0.79, allocations: 0 / 1.013 GB, free: 36.31 MB / 0.7481 GB Notification: Performance of Templates: time 0.02759/0.8176, allocations: 16.89 MB / 1.029 GB, free: 35.63 MB / 0.7481 GB " [Timeout remaining time 659] make -j1 -f BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.makefile [Timeout 660] (rm -f BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.pipe ; mkfifo BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.pipe >> ../files/BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.sim & ./BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.BoundaryConditions.SolarGeometry.BaseClasses.Examples.SolarAzimuth.pipe 2>&1) [Timeout 480] [Calling sys.exit(0), Time elapsed: 7.070692819543183] Failed to read output from testmodel.py, exit status != 0: 0.8244834532961249 0.8341816599999999 0.46935275899999995 Calling exit ... <OMPython.OMCSessionZMQ object at 0x7f1d5bd997b0>