Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo", uses=false) Using package ModelicaTest with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo) Using package Modelica with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo) Using package Complex with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo) Using package ModelicaServices with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo) Running command: translateModel(ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|Revolute1.phi|Revolute1.w|Revolute2.phi|Revolute2.w|Revolute3.phi|Revolute3.w|Revolute4.phi|Revolute4.w",fileNamePrefix="ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2") translateModel(ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|Revolute1.phi|Revolute1.w|Revolute2.phi|Revolute2.w|Revolute3.phi|Revolute3.w|Revolute4.phi|Revolute4.w",fileNamePrefix="ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo): time 0.001473/0.001473, allocations: 117.2 kB / 17.79 MB, free: 5.281 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo): time 0.001766/0.001766, allocations: 204.6 kB / 18.74 MB, free: 4.34 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo): time 1.454/1.454, allocations: 227.4 MB / 246.9 MB, free: 10.44 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo): time 0.2242/0.2242, allocations: 46.09 MB / 344.3 MB, free: 11.48 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001359/0.001359, allocations: 75.88 kB / 481.3 MB, free: 4.039 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4381/0.4395, allocations: 62.43 MB / 0.531 GB, free: 13.59 MB / 398.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2): time 0.01588/0.4554, allocations: 13.99 MB / 0.5447 GB, free: 2.602 MB / 398.1 MB Notification: Performance of NFInst.instExpressions: time 0.01134/0.4668, allocations: 4.764 MB / 0.5493 GB, free: 14.84 MB / 414.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.003209/0.47, allocations: 99.5 kB / 0.5494 GB, free: 14.77 MB / 414.1 MB Notification: Performance of NFTyping.typeComponents: time 0.008327/0.4784, allocations: 4.474 MB / 0.5538 GB, free: 10.29 MB / 414.1 MB Notification: Performance of NFTyping.typeBindings: time 0.007326/0.4858, allocations: 2.292 MB / 0.556 GB, free: 7.984 MB / 414.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003337/0.4891, allocations: 1.131 MB / 0.5571 GB, free: 6.852 MB / 414.1 MB Notification: Performance of NFFlatten.flatten: time 0.01224/0.5014, allocations: 6.415 MB / 0.5634 GB, free: 432 kB / 414.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.008714/0.5101, allocations: 5.447 MB / 0.5687 GB, free: 10.91 MB / 430.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.004976/0.5152, allocations: 2.216 MB / 0.5709 GB, free: 8.688 MB / 430.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.007342/0.5225, allocations: 2.983 MB / 0.5738 GB, free: 5.695 MB / 430.1 MB Notification: Performance of NFPackage.collectConstants: time 0.002731/0.5253, allocations: 496 kB / 0.5743 GB, free: 5.211 MB / 430.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0053/0.5307, allocations: 1.49 MB / 0.5757 GB, free: 3.719 MB / 430.1 MB Notification: Performance of NFScalarize.scalarize: time 0.004623/0.5353, allocations: 2.759 MB / 0.5784 GB, free: 0.9531 MB / 430.1 MB Notification: Performance of NFVerifyModel.verify: time 0.006589/0.5419, allocations: 3.111 MB / 0.5814 GB, free: 13.82 MB / 446.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01441/0.5564, allocations: 9.815 MB / 0.591 GB, free: 3.977 MB / 446.1 MB Notification: Performance of FrontEnd - DAE generated: time 8.236e-06/0.5564, allocations: 4 kB / 0.591 GB, free: 3.973 MB / 446.1 MB Notification: Performance of FrontEnd: time 2.344e-06/0.5564, allocations: 0 / 0.591 GB, free: 3.973 MB / 446.1 MB Notification: Performance of Transformations before backend: time 0.0004126/0.5569, allocations: 0 / 0.591 GB, free: 3.973 MB / 446.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2021 * Number of variables: 2021 Notification: Performance of Generate backend data structure: time 0.02112/0.578, allocations: 6.79 MB / 0.5977 GB, free: 13.1 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.72e-05/0.5781, allocations: 9.109 kB / 0.5977 GB, free: 13.09 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01329/0.5914, allocations: 2.625 MB / 0.6002 GB, free: 10.46 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.01306/0.6045, allocations: 3.902 MB / 0.604 GB, free: 6.496 MB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003975/0.6049, allocations: 341.1 kB / 0.6044 GB, free: 6.16 MB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.002527/0.6075, allocations: 463.8 kB / 0.6048 GB, free: 5.707 MB / 462.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.03441/0.6419, allocations: 13.97 MB / 0.6185 GB, free: 6.828 MB / 478.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0005075/0.6425, allocations: 67.31 kB / 0.6185 GB, free: 6.762 MB / 478.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.002142/0.6446, allocations: 223.8 kB / 0.6187 GB, free: 6.543 MB / 478.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.004917/0.6496, allocations: 2.539 MB / 0.6212 GB, free: 4 MB / 478.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0301/0.6797, allocations: 11.99 MB / 0.6329 GB, free: 7.996 MB / 494.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.08198/0.7617, allocations: 53.21 MB / 0.6849 GB, free: 1.402 MB / 0.5294 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01812/0.7799, allocations: 6.506 MB / 0.6912 GB, free: 10.75 MB / 0.545 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.005174/0.7851, allocations: 3.596 MB / 0.6948 GB, free: 7.137 MB / 0.545 GB Notification: Performance of preOpt evalFunc (simulation): time 0.000316/0.7855, allocations: 41.25 kB / 0.6948 GB, free: 7.098 MB / 0.545 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.751e-05/0.7856, allocations: 63.81 kB / 0.6949 GB, free: 7.023 MB / 0.545 GB Notification: Performance of pre-optimization done (n=218): time 7.034e-06/0.7856, allocations: 0 / 0.6949 GB, free: 7.023 MB / 0.545 GB Notification: Performance of matching and sorting (n=260): time 0.4519/1.237, allocations: 31.57 MB / 0.7257 GB, free: 161.5 MB / 0.5606 GB Notification: Performance of inlineWhenForInitialization (initialization): time 8.745e-05/1.238, allocations: 213.7 kB / 0.7259 GB, free: 161.2 MB / 0.5606 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.008324/1.246, allocations: 5.965 MB / 0.7317 GB, free: 159.2 MB / 0.5606 GB Notification: Performance of collectPreVariables (initialization): time 0.0005707/1.247, allocations: 61.52 kB / 0.7318 GB, free: 159.1 MB / 0.5606 GB Notification: Performance of collectInitialEqns (initialization): time 0.001888/1.248, allocations: 3.981 MB / 0.7357 GB, free: 156 MB / 0.5606 GB Notification: Performance of collectInitialBindings (initialization): time 0.0007539/1.249, allocations: 0.9949 MB / 0.7366 GB, free: 155.3 MB / 0.5606 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001731/1.251, allocations: 1.61 MB / 0.7382 GB, free: 154.6 MB / 0.5606 GB Notification: Performance of setup shared object (initialization): time 4.783e-05/1.251, allocations: 301.1 kB / 0.7385 GB, free: 154.3 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003885/1.255, allocations: 3.47 MB / 0.7419 GB, free: 153.1 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.005265/1.26, allocations: 7.889 MB / 0.7496 GB, free: 146 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01124/1.271, allocations: 12.16 MB / 0.7615 GB, free: 133.6 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001695/1.272, allocations: 44 kB / 0.7615 GB, free: 133.6 MB / 0.5606 GB Notification: Performance of matching and sorting (n=1012) (initialization): time 0.02228/1.294, allocations: 13.2 MB / 0.7744 GB, free: 120.4 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001881/1.294, allocations: 68 kB / 0.7745 GB, free: 120.3 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0002708/1.294, allocations: 156 kB / 0.7746 GB, free: 120.1 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.005346/1.3, allocations: 2.265 MB / 0.7768 GB, free: 117.9 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.006037/1.306, allocations: 1.797 MB / 0.7786 GB, free: 116.1 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01615/1.322, allocations: 14.42 MB / 0.7927 GB, free: 101.4 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.007145/1.329, allocations: 487.2 kB / 0.7931 GB, free: 100.9 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001613/1.331, allocations: 464.2 kB / 0.7936 GB, free: 100.5 MB / 0.5606 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 703 * Number of states: 0 () * Number of discrete variables: 62 (frameTorque2.torqueArrow.twoHeadedArrow,frameTorque2.torqueArrow.headAtOrigin,frameTorque2.forceArrow.twoHeadedArrow,frameTorque2.forceArrow.headAtOrigin,frameTorque1.torqueArrow.twoHeadedArrow,frameTorque1.torqueArrow.headAtOrigin,frameTorque1.forceArrow.twoHeadedArrow,frameTorque1.forceArrow.headAtOrigin,Revolute4.cylinderColor[3],Revolute4.cylinderColor[2],Revolute4.cylinderColor[1],Revolute3.cylinderColor[3],Revolute3.cylinderColor[2],Revolute3.cylinderColor[1],Revolute2.cylinderColor[3],Revolute2.cylinderColor[2],Revolute2.cylinderColor[1],frameTorque2.torqueColor[3],frameTorque2.torqueColor[2],frameTorque2.torqueColor[1],frameTorque2.forceColor[3],frameTorque2.forceColor[2],frameTorque2.forceColor[1],frameTorque1.torqueColor[3],frameTorque1.torqueColor[2],frameTorque1.torqueColor[1],frameTorque1.forceColor[3],frameTorque1.forceColor[2],frameTorque1.forceColor[1],fixed2.color[3],fixed2.color[2],fixed2.color[1],body2.color[3],body2.color[2],body2.color[1],body2.body.sphereColor[3],body2.body.sphereColor[2],body2.body.sphereColor[1],fixed1.color[3],fixed1.color[2],fixed1.color[1],body1.color[3],body1.color[2],body1.color[1],body1.body.sphereColor[3],body1.body.sphereColor[2],body1.body.sphereColor[1],Revolute1.cylinderColor[3],Revolute1.cylinderColor[2],Revolute1.cylinderColor[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (940): * Single equations (assignments): 935 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,23,100.0%), (2,23,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.006337/1.337, allocations: 2.761 MB / 0.7963 GB, free: 97.7 MB / 0.5606 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.002079/1.339, allocations: 0.4975 MB / 0.7967 GB, free: 97.19 MB / 0.5606 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01355/1.353, allocations: 7.135 MB / 0.8037 GB, free: 90.03 MB / 0.5606 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.447e-05/1.353, allocations: 31.94 kB / 0.8037 GB, free: 90 MB / 0.5606 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.708e-05/1.353, allocations: 12 kB / 0.8038 GB, free: 89.98 MB / 0.5606 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.714e-05/1.353, allocations: 15.95 kB / 0.8038 GB, free: 89.97 MB / 0.5606 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02619/1.379, allocations: 14.36 MB / 0.8178 GB, free: 75.6 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.871e-05/1.379, allocations: 4 kB / 0.8178 GB, free: 75.6 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002237/1.382, allocations: 443.3 kB / 0.8182 GB, free: 75.16 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.005023/1.387, allocations: 2.041 MB / 0.8202 GB, free: 73.12 MB / 0.5606 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0004361/1.387, allocations: 51.42 kB / 0.8203 GB, free: 73.07 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01569/1.403, allocations: 13.81 MB / 0.8338 GB, free: 58.99 MB / 0.5606 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.136e-06/1.403, allocations: 3.938 kB / 0.8338 GB, free: 58.98 MB / 0.5606 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01759/1.42, allocations: 11.32 MB / 0.8448 GB, free: 47.59 MB / 0.5606 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00181/1.422, allocations: 0.5726 MB / 0.8454 GB, free: 46.99 MB / 0.5606 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001653/1.424, allocations: 40.12 kB / 0.8454 GB, free: 46.95 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003287/1.427, allocations: 235.6 kB / 0.8456 GB, free: 46.72 MB / 0.5606 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000669/1.428, allocations: 145.8 kB / 0.8458 GB, free: 46.58 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0003284/1.428, allocations: 67.98 kB / 0.8458 GB, free: 46.52 MB / 0.5606 GB Notification: Performance of sorting global known variables: time 0.007247/1.435, allocations: 3.79 MB / 0.8495 GB, free: 42.75 MB / 0.5606 GB Notification: Performance of sort global known variables: time 1.41e-07/1.436, allocations: 0 / 0.8495 GB, free: 42.75 MB / 0.5606 GB Notification: Performance of remove unused functions: time 0.009505/1.445, allocations: 1.498 MB / 0.851 GB, free: 41.26 MB / 0.5606 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 8 (Revolute1.phi,Revolute1.w,Revolute2.phi,Revolute2.w,Revolute3.phi,Revolute3.w,Revolute4.phi,Revolute4.w) * 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 (202): * Single equations (assignments): 197 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(4,18,75.0%), (5,17,72.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0008525/1.446, allocations: 181.5 kB / 0.8512 GB, free: 41.08 MB / 0.5606 GB Notification: Performance of simCode: created initialization part: time 0.01267/1.459, allocations: 8.431 MB / 0.8594 GB, free: 32.66 MB / 0.5606 GB Notification: Performance of simCode: created event and clocks part: time 8.846e-06/1.459, allocations: 0 / 0.8594 GB, free: 32.66 MB / 0.5606 GB Notification: Performance of simCode: created simulation system equations: time 0.006825/1.465, allocations: 3.669 MB / 0.863 GB, free: 28.97 MB / 0.5606 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006572/1.472, allocations: 0.6699 MB / 0.8636 GB, free: 28.32 MB / 0.5606 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02484/1.497, allocations: 13.78 MB / 0.8771 GB, free: 14.52 MB / 0.5606 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.006693/1.504, allocations: 4.246 MB / 0.8812 GB, free: 10.24 MB / 0.5606 GB Notification: Performance of simCode: alias equations: time 0.008008/1.512, allocations: 2.551 MB / 0.8837 GB, free: 7.684 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001777/1.514, allocations: 343.4 kB / 0.8841 GB, free: 7.348 MB / 0.5606 GB Notification: Performance of SimCode: time 1.132e-06/1.514, allocations: 0 / 0.8841 GB, free: 7.348 MB / 0.5606 GB Notification: Performance of Templates: time 0.1089/1.622, allocations: 59.46 MB / 0.9421 GB, free: 12.18 MB / 0.6231 GB make -j1 -f ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.makefile (rm -f ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.pipe ; mkfifo ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.pipe ; head -c 1048576 < ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.pipe >> ../files/ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.sim & ./ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2 -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.pipe 2>&1) diffSimulationResults("ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2_res.mat","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v4.0.0/ModelicaTest/MultiBody/Forces/FrameForcesAndTorques2/FrameForcesAndTorques2.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques2.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches