Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.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 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo", uses=false) Using package Buildings with version 9.1.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/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(Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|mixBox.damOAMin.m_flow|mixBox.damOA.m_flow|mixBox.damExh.m_flow|mixBox.damRec.m_flow",fileNamePrefix="Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow") translateModel(Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|mixBox.damOAMin.m_flow|mixBox.damOA.m_flow|mixBox.damExh.m_flow|mixBox.damRec.m_flow",fileNamePrefix="Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00149/0.00149, allocations: 109.9 kB / 16.41 MB, free: 6.492 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001598/0.001598, allocations: 185.5 kB / 17.34 MB, free: 5.766 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.372/1.372, allocations: 222.9 MB / 241 MB, free: 15.16 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo): time 2.207/2.207, allocations: 390.3 MB / 0.6655 GB, free: 0.6719 MB / 0.5294 GB Notification: Performance of FrontEnd - loaded program: time 0.0024/0.0024, allocations: 64.14 kB / 0.9515 GB, free: 7.648 MB / 0.7325 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.7264/0.7288, allocations: 140.4 MB / 1.089 GB, free: 5.531 MB / 0.8575 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow): time 0.2184/0.9472, allocations: 198.4 MB / 1.282 GB, free: 7.281 MB / 1.014 GB Notification: Performance of NFInst.instExpressions: time 0.008778/0.956, allocations: 5.159 MB / 1.287 GB, free: 2.113 MB / 1.014 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002061/0.9581, allocations: 31.81 kB / 1.287 GB, free: 2.082 MB / 1.014 GB Notification: Performance of NFTyping.typeComponents: time 0.002139/0.9603, allocations: 0.621 MB / 1.288 GB, free: 1.457 MB / 1.014 GB Notification: Performance of NFTyping.typeBindings: time 0.004563/0.9649, allocations: 1.948 MB / 1.29 GB, free: 15.5 MB / 1.029 GB Notification: Performance of NFTyping.typeClassSections: time 0.004211/0.9691, allocations: 1.676 MB / 1.292 GB, free: 13.84 MB / 1.029 GB Notification: Performance of NFFlatten.flatten: time 0.004136/0.9733, allocations: 2.901 MB / 1.294 GB, free: 10.93 MB / 1.029 GB Notification: Performance of NFFlatten.resolveConnections: time 0.00212/0.9754, allocations: 1.429 MB / 1.296 GB, free: 9.48 MB / 1.029 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002266/0.9777, allocations: 1.254 MB / 1.297 GB, free: 8.223 MB / 1.029 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002108/0.9798, allocations: 1.156 MB / 1.298 GB, free: 7.062 MB / 1.029 GB Notification: Performance of NFPackage.collectConstants: time 0.0004474/0.9803, allocations: 195.9 kB / 1.298 GB, free: 6.871 MB / 1.029 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003336/0.9837, allocations: 1.391 MB / 1.3 GB, free: 5.477 MB / 1.029 GB Notification: Performance of NFScalarize.scalarize: time 0.0006217/0.9843, allocations: 0.5375 MB / 1.3 GB, free: 4.938 MB / 1.029 GB Notification: Performance of NFVerifyModel.verify: time 0.001038/0.9853, allocations: 0.8398 MB / 1.301 GB, free: 4.094 MB / 1.029 GB Notification: Performance of NFConvertDAE.convert: time 0.003619/0.989, allocations: 2.508 MB / 1.303 GB, free: 1.578 MB / 1.029 GB Notification: Performance of FrontEnd - DAE generated: time 6.833e-06/0.989, allocations: 7.938 kB / 1.303 GB, free: 1.57 MB / 1.029 GB Notification: Performance of FrontEnd: time 1.463e-06/0.989, allocations: 0 / 1.303 GB, free: 1.57 MB / 1.029 GB Notification: Performance of Transformations before backend: time 2.386e-05/0.989, allocations: 0 / 1.303 GB, free: 1.57 MB / 1.029 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 153 * Number of variables: 153 Notification: Performance of Generate backend data structure: time 0.005336/0.9944, allocations: 2.119 MB / 1.306 GB, free: 15.39 MB / 1.045 GB Notification: Performance of prepare preOptimizeDAE: time 3.952e-05/0.9944, allocations: 12.03 kB / 1.306 GB, free: 15.38 MB / 1.045 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001009/0.9954, allocations: 234 kB / 1.306 GB, free: 15.15 MB / 1.045 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002359/0.9978, allocations: 1.349 MB / 1.307 GB, free: 13.75 MB / 1.045 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.669e-05/0.9979, allocations: 57.31 kB / 1.307 GB, free: 13.69 MB / 1.045 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000145/0.998, allocations: 75.94 kB / 1.307 GB, free: 13.62 MB / 1.045 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001512/0.9996, allocations: 0.8105 MB / 1.308 GB, free: 12.8 MB / 1.045 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.454e-05/0.9996, allocations: 0 / 1.308 GB, free: 12.8 MB / 1.045 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.448e-05/0.9997, allocations: 24 kB / 1.308 GB, free: 12.78 MB / 1.045 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.961e-05/0.9997, allocations: 33.23 kB / 1.308 GB, free: 12.75 MB / 1.045 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001673/1.001, allocations: 0.8445 MB / 1.309 GB, free: 11.9 MB / 1.045 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 0.005342/1.007, allocations: 3.447 MB / 1.312 GB, free: 8.293 MB / 1.045 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001325/1.008, allocations: 0.7276 MB / 1.313 GB, free: 7.539 MB / 1.045 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007535/1.009, allocations: 453.8 kB / 1.313 GB, free: 7.094 MB / 1.045 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004119/1.009, allocations: 287.7 kB / 1.314 GB, free: 6.758 MB / 1.045 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.71e-05/1.009, allocations: 39 kB / 1.314 GB, free: 6.711 MB / 1.045 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0009105/1.01, allocations: 203.3 kB / 1.314 GB, free: 6.512 MB / 1.045 GB Notification: Performance of pre-optimization done (n=53): time 4.889e-06/1.01, allocations: 0 / 1.314 GB, free: 6.512 MB / 1.045 GB Notification: Performance of matching and sorting (n=53): time 0.002885/1.013, allocations: 1.302 MB / 1.315 GB, free: 5.199 MB / 1.045 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.554e-05/1.013, allocations: 63.78 kB / 1.315 GB, free: 5.125 MB / 1.045 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002634/1.016, allocations: 1.637 MB / 1.317 GB, free: 3.473 MB / 1.045 GB Notification: Performance of collectPreVariables (initialization): time 0.0001256/1.016, allocations: 37.7 kB / 1.317 GB, free: 3.43 MB / 1.045 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004341/1.016, allocations: 0.5307 MB / 1.317 GB, free: 2.895 MB / 1.045 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001803/1.017, allocations: 185.3 kB / 1.318 GB, free: 2.711 MB / 1.045 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000268/1.017, allocations: 150.2 kB / 1.318 GB, free: 2.559 MB / 1.045 GB Notification: Performance of setup shared object (initialization): time 0.0001157/1.017, allocations: 326 kB / 1.318 GB, free: 2.234 MB / 1.045 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007105/1.018, allocations: 358.9 kB / 1.318 GB, free: 1.879 MB / 1.045 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009537/1.019, allocations: 0.624 MB / 1.319 GB, free: 1.152 MB / 1.045 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001403/1.02, allocations: 0.761 MB / 1.32 GB, free: 400 kB / 1.045 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.03e-06/1.02, allocations: 0 / 1.32 GB, free: 400 kB / 1.045 GB Notification: Performance of matching and sorting (n=57) (initialization): time 0.00209/1.022, allocations: 0.9736 MB / 1.321 GB, free: 15.41 MB / 1.061 GB Notification: Performance of prepare postOptimizeDAE: time 1.925e-05/1.022, allocations: 8 kB / 1.321 GB, free: 15.4 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.857e-06/1.022, allocations: 0 / 1.321 GB, free: 15.4 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.033e-05/1.022, allocations: 4 kB / 1.321 GB, free: 15.39 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008388/1.023, allocations: 159.8 kB / 1.321 GB, free: 15.24 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.498e-06/1.023, allocations: 0 / 1.321 GB, free: 15.24 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001646/1.025, allocations: 127.8 kB / 1.321 GB, free: 15.11 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.338e-05/1.025, allocations: 31.97 kB / 1.321 GB, free: 15.08 MB / 1.061 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001132/1.026, allocations: 0.5752 MB / 1.322 GB, free: 14.5 MB / 1.061 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008927/1.027, allocations: 0.6203 MB / 1.322 GB, free: 13.77 MB / 1.061 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.00136/1.028, allocations: 0.7709 MB / 1.323 GB, free: 13 MB / 1.061 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.525e-06/1.028, allocations: 0 / 1.323 GB, free: 13 MB / 1.061 GB Notification: Performance of matching and sorting (n=57) (initialization_lambda0): time 0.002056/1.03, allocations: 0.9606 MB / 1.324 GB, free: 12.03 MB / 1.061 GB Notification: Performance of prepare postOptimizeDAE: time 1.326e-05/1.03, allocations: 4 kB / 1.324 GB, free: 12.02 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.476e-06/1.03, allocations: 4 kB / 1.324 GB, free: 12.02 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.504e-06/1.03, allocations: 4 kB / 1.324 GB, free: 12.02 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008065/1.031, allocations: 163.7 kB / 1.324 GB, free: 11.86 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.811e-06/1.031, allocations: 0 / 1.324 GB, free: 11.86 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001751/1.033, allocations: 168 kB / 1.324 GB, free: 11.7 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.813e-05/1.033, allocations: 31.97 kB / 1.324 GB, free: 11.66 MB / 1.061 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 1 * 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 (57): * Single equations (assignments): 57 * Array equations: 0 * Algorithm blocks: 0 * 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 0.0002423/1.033, allocations: 224.1 kB / 1.324 GB, free: 11.44 MB / 1.061 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002706/1.034, allocations: 126.4 kB / 1.325 GB, free: 11.31 MB / 1.061 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002173/1.036, allocations: 1.031 MB / 1.326 GB, free: 10.28 MB / 1.061 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.27e-05/1.036, allocations: 11.98 kB / 1.326 GB, free: 10.27 MB / 1.061 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.015e-06/1.036, allocations: 4 kB / 1.326 GB, free: 10.26 MB / 1.061 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.462e-06/1.036, allocations: 0 / 1.326 GB, free: 10.26 MB / 1.061 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 0.003961/1.04, allocations: 2.478 MB / 1.328 GB, free: 7.684 MB / 1.061 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.309e-06/1.04, allocations: 0 / 1.328 GB, free: 7.684 MB / 1.061 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007013/1.041, allocations: 131.8 kB / 1.328 GB, free: 7.555 MB / 1.061 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.657e-06/1.041, allocations: 4 kB / 1.328 GB, free: 7.551 MB / 1.061 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.613e-05/1.041, allocations: 19.94 kB / 1.328 GB, free: 7.531 MB / 1.061 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.356e-06/1.041, allocations: 15.92 kB / 1.328 GB, free: 7.516 MB / 1.061 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.234e-06/1.041, allocations: 0 / 1.328 GB, free: 7.516 MB / 1.061 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002508/1.043, allocations: 1.528 MB / 1.33 GB, free: 5.938 MB / 1.061 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005534/1.044, allocations: 343.3 kB / 1.33 GB, free: 5.582 MB / 1.061 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001997/1.044, allocations: 23.92 kB / 1.33 GB, free: 5.559 MB / 1.061 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001205/1.045, allocations: 71.91 kB / 1.33 GB, free: 5.488 MB / 1.061 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000135/1.045, allocations: 48.44 kB / 1.33 GB, free: 5.441 MB / 1.061 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.229e-05/1.045, allocations: 23.98 kB / 1.33 GB, free: 5.418 MB / 1.061 GB Notification: Performance of sorting global known variables: time 0.00181/1.047, allocations: 1.186 MB / 1.331 GB, free: 4.23 MB / 1.061 GB Notification: Performance of sort global known variables: time 4.71e-07/1.047, allocations: 0 / 1.331 GB, free: 4.23 MB / 1.061 GB Notification: Performance of remove unused functions: time 0.00137/1.049, allocations: 0.5031 MB / 1.332 GB, free: 3.727 MB / 1.061 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 10 * Number of states: 4 (mixBox.filter.s[1],mixBox.filter.s[2],mixBox.filterOutMin.s[1],mixBox.filterOutMin.s[2]) * 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 (64): * Single equations (assignments): 64 * Array equations: 0 * Algorithm blocks: 0 * 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 Backend phase and start with SimCode phase: time 0.0005183/1.049, allocations: 245.3 kB / 1.332 GB, free: 3.488 MB / 1.061 GB Notification: Performance of simCode: created initialization part: time 0.002443/1.052, allocations: 1.225 MB / 1.333 GB, free: 2.262 MB / 1.061 GB Notification: Performance of simCode: created event and clocks part: time 3.907e-06/1.052, allocations: 4 kB / 1.333 GB, free: 2.258 MB / 1.061 GB Notification: Performance of simCode: created simulation system equations: time 0.0007612/1.052, allocations: 427.5 kB / 1.334 GB, free: 1.84 MB / 1.061 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002387/1.055, allocations: 0.519 MB / 1.334 GB, free: 1.328 MB / 1.061 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003251/1.058, allocations: 2.203 MB / 1.336 GB, free: 15.06 MB / 1.076 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000636/1.059, allocations: 1.145 MB / 1.337 GB, free: 13.89 MB / 1.076 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005509/1.059, allocations: 131.3 kB / 1.337 GB, free: 13.76 MB / 1.076 GB Notification: Performance of SimCode: time 7.52e-07/1.059, allocations: 0 / 1.337 GB, free: 13.76 MB / 1.076 GB Notification: Performance of Templates: time 0.03076/1.09, allocations: 20.88 MB / 1.358 GB, free: 9.074 MB / 1.092 GB make -j1 -f Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.makefile (rm -f Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.pipe ; mkfifo Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.pipe ; head -c 1048576 < Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.pipe >> ../files/Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.sim & ./Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.pipe 2>&1) diffSimulationResults("Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_9.1.x/Buildings_Fluid_Actuators_Dampers_Examples_MixingBoxMinimumFlow.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_9_Buildings.Fluid.Actuators.Dampers.Examples.MixingBoxMinimumFlow.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches