./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de32.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:22:04,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:22:04,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:22:04,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:22:04,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:22:04,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:22:04,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:22:04,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:22:04,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:22:04,958 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:22:04,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:22:04,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:22:04,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:22:04,959 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:22:04,960 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:22:04,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:22:04,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:22:04,961 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:22:04,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:22:04,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:22:04,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:22:04,963 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:22:04,963 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:22:04,963 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:22:04,964 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:22:04,964 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:22:04,964 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:22:04,965 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:22:04,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:22:04,965 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:22:04,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:22:04,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:22:04,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:22:04,966 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:22:04,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:22:04,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:22:04,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:22:04,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:22:04,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:22:04,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:22:04,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:22:04,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:22:04,969 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:22:05,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:22:05,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:22:05,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:22:05,239 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:22:05,239 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:22:05,240 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-10-15 14:22:06,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:22:06,840 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:22:06,841 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-10-15 14:22:06,847 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/16a464be0/ec54ee77161b4b7c86690e7c33b7f96f/FLAGb1d0209e2 [2024-10-15 14:22:07,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/16a464be0/ec54ee77161b4b7c86690e7c33b7f96f [2024-10-15 14:22:07,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:22:07,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:22:07,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:22:07,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:22:07,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:22:07,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a01cff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07, skipping insertion in model container [2024-10-15 14:22:07,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,271 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:22:07,428 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2024-10-15 14:22:07,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:22:07,452 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:22:07,471 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2024-10-15 14:22:07,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:22:07,493 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:22:07,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07 WrapperNode [2024-10-15 14:22:07,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:22:07,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:22:07,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:22:07,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:22:07,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,514 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:22:07,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:22:07,514 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:22:07,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:22:07,515 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:22:07,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,524 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,533 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-15 14:22:07,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,540 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:22:07,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:22:07,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:22:07,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:22:07,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (1/1) ... [2024-10-15 14:22:07,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:22:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:07,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 14:22:07,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 14:22:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:22:07,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:22:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:22:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:22:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:22:07,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:22:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:22:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:22:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:22:07,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:22:07,695 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:22:07,698 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:22:07,840 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-15 14:22:07,840 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:22:07,858 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:22:07,859 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 14:22:07,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:22:07 BoogieIcfgContainer [2024-10-15 14:22:07,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:22:07,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:22:07,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:22:07,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:22:07,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:22:07" (1/3) ... [2024-10-15 14:22:07,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf6d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:22:07, skipping insertion in model container [2024-10-15 14:22:07,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:22:07" (2/3) ... [2024-10-15 14:22:07,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf6d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:22:07, skipping insertion in model container [2024-10-15 14:22:07,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:22:07" (3/3) ... [2024-10-15 14:22:07,867 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2024-10-15 14:22:07,878 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:22:07,878 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:22:07,920 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:22:07,925 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66e2fb0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:22:07,925 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:22:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:22:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-15 14:22:07,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:07,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:07,937 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:07,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:07,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-10-15 14:22:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779261109] [2024-10-15 14:22:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779261109] [2024-10-15 14:22:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779261109] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:22:08,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:22:08,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:22:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182066689] [2024-10-15 14:22:08,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:22:08,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:22:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:22:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:22:08,124 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:08,146 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-10-15 14:22:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:22:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-15 14:22:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:08,152 INFO L225 Difference]: With dead ends: 34 [2024-10-15 14:22:08,153 INFO L226 Difference]: Without dead ends: 14 [2024-10-15 14:22:08,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:22:08,157 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:08,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-15 14:22:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-15 14:22:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-10-15 14:22:08,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-10-15 14:22:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:08,186 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-10-15 14:22:08,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-10-15 14:22:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-15 14:22:08,188 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:08,188 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:08,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:22:08,189 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:08,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-10-15 14:22:08,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:08,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618018484] [2024-10-15 14:22:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:08,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:08,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618018484] [2024-10-15 14:22:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618018484] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:22:08,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:22:08,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:22:08,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349257624] [2024-10-15 14:22:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:22:08,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:22:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:22:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:22:08,473 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:08,539 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-10-15 14:22:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:22:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-15 14:22:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:08,541 INFO L225 Difference]: With dead ends: 21 [2024-10-15 14:22:08,541 INFO L226 Difference]: Without dead ends: 16 [2024-10-15 14:22:08,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:22:08,543 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:08,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-15 14:22:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-15 14:22:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-10-15 14:22:08,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2024-10-15 14:22:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:08,553 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-10-15 14:22:08,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-10-15 14:22:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-15 14:22:08,554 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:08,554 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:08,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:22:08,555 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:08,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-10-15 14:22:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:08,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526405215] [2024-10-15 14:22:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526405215] [2024-10-15 14:22:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526405215] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:22:08,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:22:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 14:22:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158026289] [2024-10-15 14:22:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:22:08,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 14:22:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 14:22:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:22:08,760 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:08,787 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-10-15 14:22:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 14:22:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-15 14:22:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:08,790 INFO L225 Difference]: With dead ends: 28 [2024-10-15 14:22:08,790 INFO L226 Difference]: Without dead ends: 21 [2024-10-15 14:22:08,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:22:08,791 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:08,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-15 14:22:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-15 14:22:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-15 14:22:08,802 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-10-15 14:22:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:08,803 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-15 14:22:08,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-15 14:22:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-15 14:22:08,807 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:08,807 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:08,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-15 14:22:08,808 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:08,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1074026954, now seen corresponding path program 1 times [2024-10-15 14:22:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071450530] [2024-10-15 14:22:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071450530] [2024-10-15 14:22:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071450530] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:22:08,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:22:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-15 14:22:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138939825] [2024-10-15 14:22:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:22:08,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 14:22:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 14:22:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 14:22:08,903 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:08,944 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-10-15 14:22:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 14:22:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-15 14:22:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:08,946 INFO L225 Difference]: With dead ends: 26 [2024-10-15 14:22:08,946 INFO L226 Difference]: Without dead ends: 17 [2024-10-15 14:22:08,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:22:08,949 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:08,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-15 14:22:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-15 14:22:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-15 14:22:08,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2024-10-15 14:22:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:08,957 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-15 14:22:08,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:08,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-15 14:22:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-15 14:22:08,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:08,959 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:08,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-15 14:22:08,959 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:08,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 161814611, now seen corresponding path program 1 times [2024-10-15 14:22:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:08,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865794191] [2024-10-15 14:22:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:09,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:09,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:09,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865794191] [2024-10-15 14:22:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865794191] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:09,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895648154] [2024-10-15 14:22:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:09,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:09,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:09,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:22:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:09,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-15 14:22:09,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:09,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:09,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895648154] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:09,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:22:09,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-10-15 14:22:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79224199] [2024-10-15 14:22:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:22:09,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 14:22:09,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 14:22:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:22:09,293 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:09,318 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-15 14:22:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 14:22:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-15 14:22:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:09,320 INFO L225 Difference]: With dead ends: 23 [2024-10-15 14:22:09,321 INFO L226 Difference]: Without dead ends: 16 [2024-10-15 14:22:09,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:22:09,322 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:09,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-15 14:22:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-15 14:22:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-15 14:22:09,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-10-15 14:22:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:09,327 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-15 14:22:09,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:09,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-15 14:22:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-15 14:22:09,328 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:09,329 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:09,346 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 14:22:09,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:09,533 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:09,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1564643010, now seen corresponding path program 1 times [2024-10-15 14:22:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455612827] [2024-10-15 14:22:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:09,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:09,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:09,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455612827] [2024-10-15 14:22:09,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455612827] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895279607] [2024-10-15 14:22:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:09,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:09,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:09,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:22:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:09,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-15 14:22:09,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:09,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:09,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895279607] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:09,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:22:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-10-15 14:22:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242595598] [2024-10-15 14:22:09,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:22:09,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 14:22:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 14:22:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:22:09,738 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:09,756 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-10-15 14:22:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 14:22:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-15 14:22:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:09,758 INFO L225 Difference]: With dead ends: 22 [2024-10-15 14:22:09,758 INFO L226 Difference]: Without dead ends: 17 [2024-10-15 14:22:09,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:22:09,759 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:09,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-15 14:22:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-15 14:22:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-10-15 14:22:09,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2024-10-15 14:22:09,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:09,767 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-10-15 14:22:09,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:09,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-10-15 14:22:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-15 14:22:09,768 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:09,768 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:09,784 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 14:22:09,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:22:09,973 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:09,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:09,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-10-15 14:22:09,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:09,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555134026] [2024-10-15 14:22:09,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:09,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:10,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:10,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:10,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555134026] [2024-10-15 14:22:10,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555134026] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:10,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479315368] [2024-10-15 14:22:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:10,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:10,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:10,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:10,111 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:22:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:10,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-15 14:22:10,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:10,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:10,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479315368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:10,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:10,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-15 14:22:10,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006946860] [2024-10-15 14:22:10,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:10,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:22:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:22:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:22:10,317 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:10,360 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-10-15 14:22:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:22:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-15 14:22:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:10,361 INFO L225 Difference]: With dead ends: 25 [2024-10-15 14:22:10,361 INFO L226 Difference]: Without dead ends: 20 [2024-10-15 14:22:10,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:22:10,362 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:10,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-15 14:22:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-10-15 14:22:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-15 14:22:10,370 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2024-10-15 14:22:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:10,370 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-15 14:22:10,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:10,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-15 14:22:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-15 14:22:10,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:10,372 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:10,389 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 14:22:10,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 14:22:10,577 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:10,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1520587586, now seen corresponding path program 2 times [2024-10-15 14:22:10,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:10,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169781061] [2024-10-15 14:22:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:10,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:10,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:10,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169781061] [2024-10-15 14:22:10,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169781061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:10,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677542139] [2024-10-15 14:22:10,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:22:10,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:10,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:10,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:10,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:22:10,721 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:22:10,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:10,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:22:10,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:10,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677542139] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:10,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:10,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-10-15 14:22:10,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639076137] [2024-10-15 14:22:10,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:10,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:22:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:22:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:22:10,811 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:10,899 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-10-15 14:22:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:22:10,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-15 14:22:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:10,902 INFO L225 Difference]: With dead ends: 60 [2024-10-15 14:22:10,902 INFO L226 Difference]: Without dead ends: 52 [2024-10-15 14:22:10,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:22:10,903 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:10,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:22:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-15 14:22:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-10-15 14:22:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-10-15 14:22:10,925 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2024-10-15 14:22:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:10,925 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-10-15 14:22:10,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:10,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-10-15 14:22:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-15 14:22:10,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:10,927 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:10,945 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 14:22:11,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:11,132 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:11,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2058594995, now seen corresponding path program 3 times [2024-10-15 14:22:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:11,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111450621] [2024-10-15 14:22:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:11,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:11,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111450621] [2024-10-15 14:22:11,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111450621] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721233866] [2024-10-15 14:22:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:22:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:11,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:11,203 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:22:11,244 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-15 14:22:11,245 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:11,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:22:11,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:11,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:11,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721233866] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:11,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:11,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-10-15 14:22:11,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756467654] [2024-10-15 14:22:11,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:11,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 14:22:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 14:22:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:22:11,375 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:11,558 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-10-15 14:22:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 14:22:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-15 14:22:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:11,559 INFO L225 Difference]: With dead ends: 56 [2024-10-15 14:22:11,559 INFO L226 Difference]: Without dead ends: 41 [2024-10-15 14:22:11,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:22:11,561 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:11,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-15 14:22:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-10-15 14:22:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-10-15 14:22:11,573 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 17 [2024-10-15 14:22:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:11,574 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-10-15 14:22:11,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:11,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-10-15 14:22:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-15 14:22:11,575 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:11,576 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:11,593 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:11,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:11,777 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:11,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 4 times [2024-10-15 14:22:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:11,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206773152] [2024-10-15 14:22:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:11,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:11,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:11,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206773152] [2024-10-15 14:22:11,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206773152] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969077960] [2024-10-15 14:22:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:22:11,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:11,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:11,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:11,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:22:11,981 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:22:11,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:11,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:22:11,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:12,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969077960] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:12,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-10-15 14:22:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305731121] [2024-10-15 14:22:12,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:12,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:22:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:22:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:22:12,109 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:12,197 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-10-15 14:22:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:22:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-10-15 14:22:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:12,199 INFO L225 Difference]: With dead ends: 59 [2024-10-15 14:22:12,199 INFO L226 Difference]: Without dead ends: 54 [2024-10-15 14:22:12,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:22:12,200 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:12,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-15 14:22:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-10-15 14:22:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-10-15 14:22:12,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2024-10-15 14:22:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:12,214 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-10-15 14:22:12,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:12,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-10-15 14:22:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-15 14:22:12,215 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:12,215 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:12,232 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:22:12,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 14:22:12,416 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:12,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:12,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1911342567, now seen corresponding path program 5 times [2024-10-15 14:22:12,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:12,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757670997] [2024-10-15 14:22:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:12,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:12,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757670997] [2024-10-15 14:22:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757670997] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792411254] [2024-10-15 14:22:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:22:12,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:12,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:12,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:12,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:22:12,530 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:22:12,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:12,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-15 14:22:12,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:12,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:12,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792411254] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:12,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:12,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-10-15 14:22:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132489031] [2024-10-15 14:22:12,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:12,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 14:22:12,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 14:22:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:22:12,628 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:12,792 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-10-15 14:22:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:22:12,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-10-15 14:22:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:12,793 INFO L225 Difference]: With dead ends: 88 [2024-10-15 14:22:12,794 INFO L226 Difference]: Without dead ends: 79 [2024-10-15 14:22:12,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:22:12,795 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:12,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-15 14:22:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-10-15 14:22:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4) internal successors, (77), 55 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2024-10-15 14:22:12,819 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 20 [2024-10-15 14:22:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:12,819 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2024-10-15 14:22:12,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:12,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2024-10-15 14:22:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-15 14:22:12,822 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:12,822 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:12,841 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:22:13,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:13,023 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:13,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1409703062, now seen corresponding path program 6 times [2024-10-15 14:22:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:13,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915717696] [2024-10-15 14:22:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:13,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:13,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:13,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915717696] [2024-10-15 14:22:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915717696] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892960852] [2024-10-15 14:22:13,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:22:13,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:13,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:13,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:22:13,189 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-15 14:22:13,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:13,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-15 14:22:13,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:13,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:22:13,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892960852] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:13,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:13,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-10-15 14:22:13,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202573467] [2024-10-15 14:22:13,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:13,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:22:13,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:22:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:22:13,359 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:13,526 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2024-10-15 14:22:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:22:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-10-15 14:22:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:13,527 INFO L225 Difference]: With dead ends: 80 [2024-10-15 14:22:13,527 INFO L226 Difference]: Without dead ends: 67 [2024-10-15 14:22:13,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:22:13,528 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:13,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 88 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-15 14:22:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2024-10-15 14:22:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-10-15 14:22:13,541 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 20 [2024-10-15 14:22:13,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:13,542 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-10-15 14:22:13,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:13,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-10-15 14:22:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-15 14:22:13,543 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:13,543 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:13,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 14:22:13,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:13,748 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:13,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash -457266714, now seen corresponding path program 7 times [2024-10-15 14:22:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:13,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811592668] [2024-10-15 14:22:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:13,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:13,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811592668] [2024-10-15 14:22:13,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811592668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:13,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306665772] [2024-10-15 14:22:13,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:22:13,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:13,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:13,826 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:22:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:13,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:22:13,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:13,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-15 14:22:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306665772] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:13,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:13,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-10-15 14:22:13,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100320558] [2024-10-15 14:22:13,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:13,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 14:22:13,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 14:22:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-15 14:22:13,982 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:14,096 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-10-15 14:22:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 14:22:14,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-10-15 14:22:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:14,098 INFO L225 Difference]: With dead ends: 61 [2024-10-15 14:22:14,098 INFO L226 Difference]: Without dead ends: 48 [2024-10-15 14:22:14,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:22:14,099 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:14,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-15 14:22:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-15 14:22:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-10-15 14:22:14,120 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 20 [2024-10-15 14:22:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:14,120 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-10-15 14:22:14,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:14,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-10-15 14:22:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-15 14:22:14,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:14,122 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:14,139 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:14,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 14:22:14,327 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:14,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:14,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2034432077, now seen corresponding path program 8 times [2024-10-15 14:22:14,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:14,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947193608] [2024-10-15 14:22:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:14,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 14:22:14,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:14,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947193608] [2024-10-15 14:22:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947193608] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:14,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054720123] [2024-10-15 14:22:14,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:22:14,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:14,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:14,493 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:14,494 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:22:14,533 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:22:14,533 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:14,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:22:14,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:14,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:22:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054720123] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:14,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-10-15 14:22:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053375501] [2024-10-15 14:22:14,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:14,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:22:14,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:22:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:22:14,678 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:14,893 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-10-15 14:22:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 14:22:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-10-15 14:22:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:14,894 INFO L225 Difference]: With dead ends: 75 [2024-10-15 14:22:14,894 INFO L226 Difference]: Without dead ends: 65 [2024-10-15 14:22:14,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:22:14,895 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:14,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-15 14:22:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-10-15 14:22:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-10-15 14:22:14,918 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 21 [2024-10-15 14:22:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:14,919 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-10-15 14:22:14,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:14,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-10-15 14:22:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-15 14:22:14,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:14,920 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:14,937 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:15,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 14:22:15,121 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:15,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 9 times [2024-10-15 14:22:15,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:15,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490391824] [2024-10-15 14:22:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:15,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:15,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:15,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:15,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490391824] [2024-10-15 14:22:15,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490391824] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419784757] [2024-10-15 14:22:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:22:15,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:15,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:15,282 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:22:15,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:22:15,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:15,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:22:15,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:15,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:15,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419784757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:15,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:15,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-10-15 14:22:15,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002350525] [2024-10-15 14:22:15,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:15,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 14:22:15,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 14:22:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:22:15,475 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:15,568 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-10-15 14:22:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 14:22:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-10-15 14:22:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:15,569 INFO L225 Difference]: With dead ends: 87 [2024-10-15 14:22:15,570 INFO L226 Difference]: Without dead ends: 78 [2024-10-15 14:22:15,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:22:15,570 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:15,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-15 14:22:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2024-10-15 14:22:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-15 14:22:15,598 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 22 [2024-10-15 14:22:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:15,598 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-15 14:22:15,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:15,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-15 14:22:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-15 14:22:15,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:15,599 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:15,618 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 14:22:15,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:22:15,800 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:15,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 571398099, now seen corresponding path program 10 times [2024-10-15 14:22:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:15,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915480270] [2024-10-15 14:22:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:15,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:15,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915480270] [2024-10-15 14:22:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915480270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548154178] [2024-10-15 14:22:15,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:22:15,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:15,945 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:15,947 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:22:15,988 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:22:15,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:15,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-15 14:22:15,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:16,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:16,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548154178] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:16,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:16,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-10-15 14:22:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967897380] [2024-10-15 14:22:16,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:16,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:22:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:22:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:22:16,218 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:17,201 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2024-10-15 14:22:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-15 14:22:17,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-10-15 14:22:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:17,203 INFO L225 Difference]: With dead ends: 96 [2024-10-15 14:22:17,203 INFO L226 Difference]: Without dead ends: 74 [2024-10-15 14:22:17,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:22:17,204 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:17,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:22:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-15 14:22:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-10-15 14:22:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-10-15 14:22:17,230 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 23 [2024-10-15 14:22:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:17,230 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-10-15 14:22:17,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:17,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-10-15 14:22:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-15 14:22:17,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:17,231 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:17,246 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 14:22:17,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:22:17,432 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:17,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 11 times [2024-10-15 14:22:17,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:17,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321085047] [2024-10-15 14:22:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:17,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:17,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:17,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321085047] [2024-10-15 14:22:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321085047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:17,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915205137] [2024-10-15 14:22:17,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:22:17,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:17,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:17,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:17,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:22:17,702 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:22:17,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:17,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:22:17,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:17,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:17,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915205137] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:17,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:17,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-10-15 14:22:17,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479134562] [2024-10-15 14:22:17,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:17,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:22:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:22:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:22:17,865 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:17,970 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-10-15 14:22:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:22:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-10-15 14:22:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:17,974 INFO L225 Difference]: With dead ends: 87 [2024-10-15 14:22:17,974 INFO L226 Difference]: Without dead ends: 77 [2024-10-15 14:22:17,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:22:17,975 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:17,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-15 14:22:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-10-15 14:22:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-10-15 14:22:18,005 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 25 [2024-10-15 14:22:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:18,006 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-10-15 14:22:18,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:18,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-10-15 14:22:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-15 14:22:18,008 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:18,008 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:18,026 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-15 14:22:18,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:22:18,208 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:18,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:18,209 INFO L85 PathProgramCache]: Analyzing trace with hash -874703007, now seen corresponding path program 12 times [2024-10-15 14:22:18,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:18,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707010404] [2024-10-15 14:22:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:18,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:18,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:18,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:18,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707010404] [2024-10-15 14:22:18,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707010404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:18,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560622921] [2024-10-15 14:22:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:22:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:18,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:18,357 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 14:22:18,405 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:22:18,406 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:18,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 14:22:18,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:18,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:22:18,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560622921] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:18,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:18,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2024-10-15 14:22:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405906720] [2024-10-15 14:22:18,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:18,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:22:18,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:22:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:22:18,612 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:19,019 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-10-15 14:22:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:22:19,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-10-15 14:22:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:19,021 INFO L225 Difference]: With dead ends: 89 [2024-10-15 14:22:19,021 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 14:22:19,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 14:22:19,022 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:19,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:22:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 14:22:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-10-15 14:22:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-10-15 14:22:19,050 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 25 [2024-10-15 14:22:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:19,050 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-10-15 14:22:19,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:19,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-10-15 14:22:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-15 14:22:19,053 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:19,054 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:19,071 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-15 14:22:19,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 14:22:19,258 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:19,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1920087306, now seen corresponding path program 13 times [2024-10-15 14:22:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939213140] [2024-10-15 14:22:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:19,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:19,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939213140] [2024-10-15 14:22:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939213140] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001823537] [2024-10-15 14:22:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:22:19,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:19,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:19,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 14:22:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:19,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-15 14:22:19,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:19,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:19,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001823537] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:19,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:19,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-10-15 14:22:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040451188] [2024-10-15 14:22:19,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:19,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:22:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:22:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:22:19,759 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:21,275 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2024-10-15 14:22:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-15 14:22:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-10-15 14:22:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:21,278 INFO L225 Difference]: With dead ends: 134 [2024-10-15 14:22:21,278 INFO L226 Difference]: Without dead ends: 108 [2024-10-15 14:22:21,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=678, Invalid=3744, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 14:22:21,281 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:21,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 166 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:22:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-15 14:22:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2024-10-15 14:22:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-10-15 14:22:21,309 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 26 [2024-10-15 14:22:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:21,310 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-10-15 14:22:21,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:21,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-10-15 14:22:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-15 14:22:21,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:21,311 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:21,328 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:21,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:21,516 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:21,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 14 times [2024-10-15 14:22:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815679186] [2024-10-15 14:22:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:21,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:22:21,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:21,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815679186] [2024-10-15 14:22:21,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815679186] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:21,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571667858] [2024-10-15 14:22:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:22:21,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:21,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:21,734 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:21,735 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 14:22:21,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:22:21,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:21,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-15 14:22:21,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:22:21,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:22:21,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571667858] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:21,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:21,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-10-15 14:22:21,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450022652] [2024-10-15 14:22:21,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:21,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 14:22:21,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 14:22:21,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:22:21,932 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:22,057 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2024-10-15 14:22:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:22:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-10-15 14:22:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:22,059 INFO L225 Difference]: With dead ends: 101 [2024-10-15 14:22:22,059 INFO L226 Difference]: Without dead ends: 90 [2024-10-15 14:22:22,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:22:22,060 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:22,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-15 14:22:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-10-15 14:22:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2024-10-15 14:22:22,088 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 28 [2024-10-15 14:22:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:22,089 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2024-10-15 14:22:22,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:22,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2024-10-15 14:22:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-15 14:22:22,089 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:22,090 INFO L215 NwaCegarLoop]: trace histogram [8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:22,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 14:22:22,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:22,290 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:22,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1371434858, now seen corresponding path program 15 times [2024-10-15 14:22:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:22,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798949128] [2024-10-15 14:22:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:22,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798949128] [2024-10-15 14:22:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798949128] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184390056] [2024-10-15 14:22:22,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:22:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:22,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:22,486 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 14:22:22,528 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:22:22,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:22,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:22:22,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:22,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184390056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:22,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:22,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 27 [2024-10-15 14:22:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240154803] [2024-10-15 14:22:22,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:22,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-15 14:22:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-15 14:22:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:22:22,859 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:23,844 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2024-10-15 14:22:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-15 14:22:23,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-10-15 14:22:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:23,845 INFO L225 Difference]: With dead ends: 127 [2024-10-15 14:22:23,846 INFO L226 Difference]: Without dead ends: 106 [2024-10-15 14:22:23,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2024-10-15 14:22:23,848 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:23,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:22:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-15 14:22:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-10-15 14:22:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-10-15 14:22:23,884 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 28 [2024-10-15 14:22:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:23,885 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-10-15 14:22:23,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:23,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-10-15 14:22:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-15 14:22:23,886 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:23,886 INFO L215 NwaCegarLoop]: trace histogram [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:23,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-15 14:22:24,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:24,087 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:24,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash -160836781, now seen corresponding path program 16 times [2024-10-15 14:22:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:24,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908019687] [2024-10-15 14:22:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:24,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:22:24,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908019687] [2024-10-15 14:22:24,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908019687] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424987356] [2024-10-15 14:22:24,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:22:24,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:24,342 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:24,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 14:22:24,389 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:22:24,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:24,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:22:24,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:22:24,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:22:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424987356] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:24,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 29 [2024-10-15 14:22:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221410243] [2024-10-15 14:22:24,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:24,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-15 14:22:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-15 14:22:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2024-10-15 14:22:24,699 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:25,332 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-10-15 14:22:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:22:25,335 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-10-15 14:22:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:25,336 INFO L225 Difference]: With dead ends: 172 [2024-10-15 14:22:25,336 INFO L226 Difference]: Without dead ends: 161 [2024-10-15 14:22:25,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:22:25,337 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:25,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 240 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:22:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-10-15 14:22:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2024-10-15 14:22:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-10-15 14:22:25,376 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 29 [2024-10-15 14:22:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:25,376 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-10-15 14:22:25,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:25,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-10-15 14:22:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 14:22:25,378 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:25,379 INFO L215 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:25,400 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-15 14:22:25,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:22:25,583 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:25,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -511416493, now seen corresponding path program 17 times [2024-10-15 14:22:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550104922] [2024-10-15 14:22:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:25,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:22:25,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550104922] [2024-10-15 14:22:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550104922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218160994] [2024-10-15 14:22:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:22:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:25,772 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:25,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 14:22:25,855 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-15 14:22:25,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:25,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:22:25,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:22:25,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:22:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218160994] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:26,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:26,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-10-15 14:22:26,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378478338] [2024-10-15 14:22:26,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:26,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 14:22:26,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 14:22:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:22:26,279 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:26,914 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2024-10-15 14:22:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:22:26,915 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-10-15 14:22:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:26,916 INFO L225 Difference]: With dead ends: 171 [2024-10-15 14:22:26,916 INFO L226 Difference]: Without dead ends: 150 [2024-10-15 14:22:26,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2024-10-15 14:22:26,917 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:26,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 195 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:22:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-15 14:22:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 94. [2024-10-15 14:22:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-10-15 14:22:26,974 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 31 [2024-10-15 14:22:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:26,975 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-10-15 14:22:26,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:26,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-10-15 14:22:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 14:22:26,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:26,977 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:26,995 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-15 14:22:27,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-15 14:22:27,181 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:27,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 18 times [2024-10-15 14:22:27,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:27,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438827061] [2024-10-15 14:22:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:27,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:27,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438827061] [2024-10-15 14:22:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438827061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774670895] [2024-10-15 14:22:27,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:22:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:27,428 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:27,429 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 14:22:27,492 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:22:27,493 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:27,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-15 14:22:27,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:27,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:27,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774670895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:27,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:27,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-10-15 14:22:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043294660] [2024-10-15 14:22:27,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:27,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-15 14:22:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-15 14:22:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:22:27,705 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:27,878 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2024-10-15 14:22:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-15 14:22:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-10-15 14:22:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:27,879 INFO L225 Difference]: With dead ends: 149 [2024-10-15 14:22:27,879 INFO L226 Difference]: Without dead ends: 137 [2024-10-15 14:22:27,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-15 14:22:27,880 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:27,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-15 14:22:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2024-10-15 14:22:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.21) internal successors, (121), 100 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-10-15 14:22:27,919 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 31 [2024-10-15 14:22:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:27,919 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-10-15 14:22:27,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:27,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-10-15 14:22:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:22:27,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:27,920 INFO L215 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:27,932 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-15 14:22:28,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:22:28,121 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:28,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1253123073, now seen corresponding path program 19 times [2024-10-15 14:22:28,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:28,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746499741] [2024-10-15 14:22:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:28,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:22:28,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746499741] [2024-10-15 14:22:28,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746499741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258587841] [2024-10-15 14:22:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:22:28,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:28,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:28,341 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 14:22:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:28,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-15 14:22:28,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:28,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:28,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258587841] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:28,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:28,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-10-15 14:22:28,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815759332] [2024-10-15 14:22:28,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:28,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 14:22:28,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 14:22:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:22:28,861 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:33,820 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2024-10-15 14:22:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-10-15 14:22:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-10-15 14:22:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:33,822 INFO L225 Difference]: With dead ends: 237 [2024-10-15 14:22:33,822 INFO L226 Difference]: Without dead ends: 194 [2024-10-15 14:22:33,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2042, Invalid=13708, Unknown=0, NotChecked=0, Total=15750 [2024-10-15 14:22:33,833 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 388 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:33,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 232 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:22:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-10-15 14:22:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2024-10-15 14:22:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 126 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 160 transitions. [2024-10-15 14:22:33,920 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 160 transitions. Word has length 33 [2024-10-15 14:22:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:33,920 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 160 transitions. [2024-10-15 14:22:33,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:33,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 160 transitions. [2024-10-15 14:22:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:22:33,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:33,922 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:33,938 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:34,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:22:34,126 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:34,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1779115071, now seen corresponding path program 20 times [2024-10-15 14:22:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35849211] [2024-10-15 14:22:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:34,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35849211] [2024-10-15 14:22:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35849211] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:34,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375838009] [2024-10-15 14:22:34,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:22:34,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:34,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:34,387 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:34,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 14:22:34,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:22:34,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:34,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-15 14:22:34,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:34,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-15 14:22:34,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375838009] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:34,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:34,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-10-15 14:22:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059136495] [2024-10-15 14:22:34,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:34,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-15 14:22:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-15 14:22:34,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 14:22:34,818 INFO L87 Difference]: Start difference. First operand 131 states and 160 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:35,955 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-10-15 14:22:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-15 14:22:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-10-15 14:22:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:35,956 INFO L225 Difference]: With dead ends: 156 [2024-10-15 14:22:35,956 INFO L226 Difference]: Without dead ends: 139 [2024-10-15 14:22:35,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=3313, Unknown=0, NotChecked=0, Total=3782 [2024-10-15 14:22:35,958 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:35,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 301 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:22:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-15 14:22:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2024-10-15 14:22:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2024-10-15 14:22:36,021 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 33 [2024-10-15 14:22:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:36,021 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2024-10-15 14:22:36,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:36,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2024-10-15 14:22:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:22:36,022 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:36,022 INFO L215 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:36,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-15 14:22:36,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 14:22:36,226 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:36,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1898873598, now seen corresponding path program 21 times [2024-10-15 14:22:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527455480] [2024-10-15 14:22:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:36,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:22:36,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527455480] [2024-10-15 14:22:36,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527455480] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:36,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718299755] [2024-10-15 14:22:36,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:22:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:36,518 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:36,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 14:22:36,566 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:22:36,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:36,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:22:36,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:22:36,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:22:37,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718299755] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:37,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:37,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 35 [2024-10-15 14:22:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402185500] [2024-10-15 14:22:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:37,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-15 14:22:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-15 14:22:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 14:22:37,095 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:38,748 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-10-15 14:22:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-10-15 14:22:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-10-15 14:22:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:38,749 INFO L225 Difference]: With dead ends: 174 [2024-10-15 14:22:38,749 INFO L226 Difference]: Without dead ends: 162 [2024-10-15 14:22:38,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1288, Invalid=6194, Unknown=0, NotChecked=0, Total=7482 [2024-10-15 14:22:38,752 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 202 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:38,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:22:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-15 14:22:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2024-10-15 14:22:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-10-15 14:22:38,817 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 33 [2024-10-15 14:22:38,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:38,818 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-10-15 14:22:38,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:38,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-10-15 14:22:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-15 14:22:38,819 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:38,819 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:38,833 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-15 14:22:39,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:22:39,020 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:39,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 22 times [2024-10-15 14:22:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079996440] [2024-10-15 14:22:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:39,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 14:22:39,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:39,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079996440] [2024-10-15 14:22:39,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079996440] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:39,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434922321] [2024-10-15 14:22:39,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:22:39,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:39,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:39,319 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:39,320 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 14:22:39,361 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:22:39,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:39,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:22:39,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 14:22:39,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 14:22:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434922321] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:39,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:39,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2024-10-15 14:22:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054511839] [2024-10-15 14:22:39,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:39,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 14:22:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 14:22:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-10-15 14:22:39,533 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:39,685 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2024-10-15 14:22:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:22:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-10-15 14:22:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:39,686 INFO L225 Difference]: With dead ends: 157 [2024-10-15 14:22:39,686 INFO L226 Difference]: Without dead ends: 144 [2024-10-15 14:22:39,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:22:39,687 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:39,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-15 14:22:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2024-10-15 14:22:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.183206106870229) internal successors, (155), 131 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2024-10-15 14:22:39,758 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 34 [2024-10-15 14:22:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:39,758 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2024-10-15 14:22:39,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:39,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2024-10-15 14:22:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:22:39,759 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:39,759 INFO L215 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:39,773 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-15 14:22:39,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-15 14:22:39,960 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:39,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1701774746, now seen corresponding path program 23 times [2024-10-15 14:22:39,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:39,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803945664] [2024-10-15 14:22:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:39,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:40,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-15 14:22:40,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803945664] [2024-10-15 14:22:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803945664] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050465783] [2024-10-15 14:22:40,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:22:40,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:40,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:40,206 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:40,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-15 14:22:40,365 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-15 14:22:40,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:40,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-15 14:22:40,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-15 14:22:40,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-15 14:22:40,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050465783] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:40,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:40,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-10-15 14:22:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591312959] [2024-10-15 14:22:40,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:40,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:22:40,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:22:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:22:40,911 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:42,347 INFO L93 Difference]: Finished difference Result 263 states and 301 transitions. [2024-10-15 14:22:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-15 14:22:42,347 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-10-15 14:22:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:42,348 INFO L225 Difference]: With dead ends: 263 [2024-10-15 14:22:42,349 INFO L226 Difference]: Without dead ends: 239 [2024-10-15 14:22:42,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=3855, Unknown=0, NotChecked=0, Total=4830 [2024-10-15 14:22:42,350 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:42,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:22:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-10-15 14:22:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 131. [2024-10-15 14:22:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-10-15 14:22:42,428 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2024-10-15 14:22:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:42,428 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-10-15 14:22:42,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:42,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-10-15 14:22:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 14:22:42,429 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:42,430 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:42,442 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:42,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-15 14:22:42,630 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:42,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1044738881, now seen corresponding path program 24 times [2024-10-15 14:22:42,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:42,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858170772] [2024-10-15 14:22:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:42,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858170772] [2024-10-15 14:22:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858170772] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125950751] [2024-10-15 14:22:42,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:22:42,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:42,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:42,919 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:42,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-15 14:22:43,037 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:22:43,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:43,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:22:43,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:43,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:43,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125950751] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:43,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:43,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-10-15 14:22:43,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47960666] [2024-10-15 14:22:43,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:43,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:22:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:22:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:22:43,313 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:43,560 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2024-10-15 14:22:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 14:22:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-10-15 14:22:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:43,562 INFO L225 Difference]: With dead ends: 206 [2024-10-15 14:22:43,562 INFO L226 Difference]: Without dead ends: 192 [2024-10-15 14:22:43,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 20 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:22:43,563 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:43,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:22:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-10-15 14:22:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2024-10-15 14:22:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 143 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2024-10-15 14:22:43,641 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 37 [2024-10-15 14:22:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:43,641 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2024-10-15 14:22:43,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:43,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2024-10-15 14:22:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 14:22:43,642 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:43,642 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:43,658 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-15 14:22:43,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:43,847 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:43,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash -939864138, now seen corresponding path program 25 times [2024-10-15 14:22:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392168811] [2024-10-15 14:22:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:44,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392168811] [2024-10-15 14:22:44,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392168811] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301564271] [2024-10-15 14:22:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:22:44,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:44,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:44,146 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:44,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-15 14:22:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:44,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:22:44,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:44,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:22:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301564271] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:44,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-10-15 14:22:44,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734018758] [2024-10-15 14:22:44,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:44,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 14:22:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 14:22:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:22:44,741 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:22:57,092 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2024-10-15 14:22:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-10-15 14:22:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-10-15 14:22:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:22:57,094 INFO L225 Difference]: With dead ends: 312 [2024-10-15 14:22:57,094 INFO L226 Difference]: Without dead ends: 260 [2024-10-15 14:22:57,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9895 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2024-10-15 14:22:57,098 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 692 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:22:57,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 224 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:22:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-15 14:22:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2024-10-15 14:22:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 154 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2024-10-15 14:22:57,187 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 38 [2024-10-15 14:22:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:22:57,187 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2024-10-15 14:22:57,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:22:57,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2024-10-15 14:22:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 14:22:57,189 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:22:57,189 INFO L215 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:22:57,207 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-15 14:22:57,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:57,394 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:22:57,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:22:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash -981807486, now seen corresponding path program 26 times [2024-10-15 14:22:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:22:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455328421] [2024-10-15 14:22:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:22:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:22:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:57,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:22:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:22:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:57,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:22:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455328421] [2024-10-15 14:22:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455328421] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:22:57,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621907590] [2024-10-15 14:22:57,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:22:57,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:22:57,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:22:57,793 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:22:57,794 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-15 14:22:57,848 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:22:57,848 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:22:57,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-15 14:22:57,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:22:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:22:58,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:22:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-15 14:22:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621907590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:22:58,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:22:58,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 42 [2024-10-15 14:22:58,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92783269] [2024-10-15 14:22:58,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:22:58,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:22:58,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:22:58,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:22:58,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:22:58,377 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:23:01,173 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2024-10-15 14:23:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-10-15 14:23:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-10-15 14:23:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:23:01,175 INFO L225 Difference]: With dead ends: 249 [2024-10-15 14:23:01,175 INFO L226 Difference]: Without dead ends: 222 [2024-10-15 14:23:01,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=867, Invalid=8835, Unknown=0, NotChecked=0, Total=9702 [2024-10-15 14:23:01,176 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:23:01,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 484 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:23:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-15 14:23:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2024-10-15 14:23:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.160220994475138) internal successors, (210), 181 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2024-10-15 14:23:01,297 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 39 [2024-10-15 14:23:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:23:01,297 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2024-10-15 14:23:01,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:01,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2024-10-15 14:23:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 14:23:01,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:23:01,298 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:23:01,310 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-15 14:23:01,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:01,499 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:23:01,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash -316344474, now seen corresponding path program 27 times [2024-10-15 14:23:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:23:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742542925] [2024-10-15 14:23:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:23:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:23:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:01,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:23:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:23:01,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:23:01,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742542925] [2024-10-15 14:23:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742542925] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:23:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630678986] [2024-10-15 14:23:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:23:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:01,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:23:01,834 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:23:01,836 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-15 14:23:01,969 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 14:23:01,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:23:01,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-15 14:23:01,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:23:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:23:02,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:23:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:23:02,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630678986] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:23:02,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:23:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2024-10-15 14:23:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642049788] [2024-10-15 14:23:02,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:23:02,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:23:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:23:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:23:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:23:02,215 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:23:02,486 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2024-10-15 14:23:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:23:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-10-15 14:23:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:23:02,488 INFO L225 Difference]: With dead ends: 225 [2024-10-15 14:23:02,488 INFO L226 Difference]: Without dead ends: 210 [2024-10-15 14:23:02,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 22 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:23:02,488 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:23:02,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 268 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:23:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-10-15 14:23:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2024-10-15 14:23:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.1631578947368422) internal successors, (221), 190 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-10-15 14:23:02,598 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 40 [2024-10-15 14:23:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:23:02,598 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-10-15 14:23:02,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:02,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-10-15 14:23:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:23:02,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:23:02,599 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:23:02,617 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-15 14:23:02,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-15 14:23:02,800 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:23:02,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -325611725, now seen corresponding path program 28 times [2024-10-15 14:23:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:23:02,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975332539] [2024-10-15 14:23:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:23:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:23:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:03,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:23:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:23:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:23:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975332539] [2024-10-15 14:23:03,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975332539] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:23:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154378160] [2024-10-15 14:23:03,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:23:03,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:03,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:23:03,120 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:23:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-15 14:23:03,167 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:23:03,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:23:03,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 14:23:03,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:23:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:23:03,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:23:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:23:03,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154378160] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:23:03,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:23:03,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-10-15 14:23:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656429702] [2024-10-15 14:23:03,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:23:03,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:23:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:23:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:23:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:23:03,751 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:23:23,332 INFO L93 Difference]: Finished difference Result 404 states and 469 transitions. [2024-10-15 14:23:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2024-10-15 14:23:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-10-15 14:23:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:23:23,334 INFO L225 Difference]: With dead ends: 404 [2024-10-15 14:23:23,334 INFO L226 Difference]: Without dead ends: 349 [2024-10-15 14:23:23,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14929 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2024-10-15 14:23:23,338 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 852 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:23:23,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 286 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:23:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-15 14:23:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 209. [2024-10-15 14:23:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1764705882352942) internal successors, (240), 204 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-10-15 14:23:23,472 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 41 [2024-10-15 14:23:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:23:23,473 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-10-15 14:23:23,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:23,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-10-15 14:23:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:23:23,474 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:23:23,474 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:23:23,486 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-15 14:23:23,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-15 14:23:23,674 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:23:23,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1065646369, now seen corresponding path program 29 times [2024-10-15 14:23:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:23:23,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567595923] [2024-10-15 14:23:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:23:23,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:23:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:24,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:23:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:23:24,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:23:24,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567595923] [2024-10-15 14:23:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567595923] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:23:24,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252191302] [2024-10-15 14:23:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:23:24,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:23:24,037 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:23:24,039 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-15 14:23:24,204 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-15 14:23:24,204 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:23:24,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:23:24,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:23:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:23:24,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:23:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:23:24,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252191302] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:23:24,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:23:24,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2024-10-15 14:23:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028104305] [2024-10-15 14:23:24,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:23:24,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:23:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:23:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:23:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:23:24,441 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:23:24,782 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-10-15 14:23:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 14:23:24,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-10-15 14:23:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:23:24,784 INFO L225 Difference]: With dead ends: 251 [2024-10-15 14:23:24,785 INFO L226 Difference]: Without dead ends: 235 [2024-10-15 14:23:24,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:23:24,785 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:23:24,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 307 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:23:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-15 14:23:24,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2024-10-15 14:23:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 215 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2024-10-15 14:23:24,972 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 43 [2024-10-15 14:23:24,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:23:24,972 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2024-10-15 14:23:24,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:24,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2024-10-15 14:23:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:23:24,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:23:24,974 INFO L215 NwaCegarLoop]: trace histogram [16, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:23:24,990 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-15 14:23:25,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-15 14:23:25,175 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:23:25,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -133663071, now seen corresponding path program 30 times [2024-10-15 14:23:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:23:25,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28898620] [2024-10-15 14:23:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:23:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:23:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:25,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:23:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:23:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:23:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28898620] [2024-10-15 14:23:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28898620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:23:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185001451] [2024-10-15 14:23:25,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:23:25,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:23:25,612 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:23:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-15 14:23:25,742 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-15 14:23:25,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:23:25,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-15 14:23:25,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:23:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:23:25,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:23:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-10-15 14:23:26,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185001451] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:23:26,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:23:26,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 16] total 47 [2024-10-15 14:23:26,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236709413] [2024-10-15 14:23:26,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:23:26,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-15 14:23:26,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:23:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-15 14:23:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2024-10-15 14:23:26,342 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:23:30,132 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2024-10-15 14:23:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-10-15 14:23:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-10-15 14:23:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:23:30,134 INFO L225 Difference]: With dead ends: 284 [2024-10-15 14:23:30,134 INFO L226 Difference]: Without dead ends: 240 [2024-10-15 14:23:30,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1183, Invalid=12389, Unknown=0, NotChecked=0, Total=13572 [2024-10-15 14:23:30,136 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:23:30,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 556 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:23:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-10-15 14:23:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-10-15 14:23:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.1598173515981736) internal successors, (254), 219 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2024-10-15 14:23:30,288 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 43 [2024-10-15 14:23:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:23:30,289 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2024-10-15 14:23:30,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:30,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2024-10-15 14:23:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:23:30,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:23:30,290 INFO L215 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:23:30,305 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-15 14:23:30,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-15 14:23:30,490 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:23:30,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1260222622, now seen corresponding path program 31 times [2024-10-15 14:23:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:23:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974644812] [2024-10-15 14:23:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:23:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:23:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:30,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:23:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-15 14:23:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:23:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974644812] [2024-10-15 14:23:30,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974644812] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:23:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192215355] [2024-10-15 14:23:30,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:23:30,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:30,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:23:30,931 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:23:30,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-15 14:23:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:30,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-15 14:23:30,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:23:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:23:31,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:23:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-15 14:23:31,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192215355] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:23:31,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:23:31,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 16] total 49 [2024-10-15 14:23:31,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101217570] [2024-10-15 14:23:31,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:23:31,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-15 14:23:31,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:23:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-15 14:23:31,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2024-10-15 14:23:31,572 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:23:33,752 INFO L93 Difference]: Finished difference Result 409 states and 484 transitions. [2024-10-15 14:23:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-10-15 14:23:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-10-15 14:23:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:23:33,754 INFO L225 Difference]: With dead ends: 409 [2024-10-15 14:23:33,754 INFO L226 Difference]: Without dead ends: 395 [2024-10-15 14:23:33,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2024-10-15 14:23:33,755 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 309 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:23:33,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 542 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:23:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-10-15 14:23:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 223. [2024-10-15 14:23:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.146788990825688) internal successors, (250), 218 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2024-10-15 14:23:33,908 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 43 [2024-10-15 14:23:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:23:33,909 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2024-10-15 14:23:33,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:23:33,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2024-10-15 14:23:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:23:33,910 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:23:33,910 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:23:33,927 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-15 14:23:34,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-15 14:23:34,111 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:23:34,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:23:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash -535534058, now seen corresponding path program 32 times [2024-10-15 14:23:34,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:23:34,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987005916] [2024-10-15 14:23:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:23:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:23:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:34,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:23:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:23:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:23:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:23:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987005916] [2024-10-15 14:23:34,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987005916] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:23:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169554867] [2024-10-15 14:23:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:23:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:23:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:23:34,499 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:23:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-15 14:23:34,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:23:34,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:23:34,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:23:34,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:23:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:23:34,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:23:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:23:35,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169554867] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:23:35,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:23:35,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-10-15 14:23:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327870756] [2024-10-15 14:23:35,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:23:35,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:23:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:23:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:23:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:23:35,260 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:24:06,152 INFO L93 Difference]: Finished difference Result 463 states and 527 transitions. [2024-10-15 14:24:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-10-15 14:24:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-10-15 14:24:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:24:06,154 INFO L225 Difference]: With dead ends: 463 [2024-10-15 14:24:06,154 INFO L226 Difference]: Without dead ends: 399 [2024-10-15 14:24:06,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21643 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=9078, Invalid=50214, Unknown=0, NotChecked=0, Total=59292 [2024-10-15 14:24:06,158 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1046 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:24:06,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 299 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-15 14:24:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-10-15 14:24:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 238. [2024-10-15 14:24:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1587982832618027) internal successors, (270), 233 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 274 transitions. [2024-10-15 14:24:06,394 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 274 transitions. Word has length 44 [2024-10-15 14:24:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:24:06,394 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 274 transitions. [2024-10-15 14:24:06,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:06,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 274 transitions. [2024-10-15 14:24:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:24:06,396 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:24:06,396 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:24:06,415 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-15 14:24:06,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-15 14:24:06,597 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:24:06,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1831492090, now seen corresponding path program 33 times [2024-10-15 14:24:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:24:06,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514340816] [2024-10-15 14:24:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:24:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:24:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:07,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:24:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:24:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:24:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514340816] [2024-10-15 14:24:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514340816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:24:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108201758] [2024-10-15 14:24:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:24:07,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:07,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:24:07,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:24:07,015 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-15 14:24:07,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-15 14:24:07,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:24:07,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-15 14:24:07,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:24:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:24:07,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:24:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:24:07,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108201758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:24:07,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:24:07,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2024-10-15 14:24:07,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12685028] [2024-10-15 14:24:07,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:24:07,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:24:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:24:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:24:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:24:07,479 INFO L87 Difference]: Start difference. First operand 238 states and 274 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:24:07,888 INFO L93 Difference]: Finished difference Result 280 states and 321 transitions. [2024-10-15 14:24:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:24:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-10-15 14:24:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:24:07,890 INFO L225 Difference]: With dead ends: 280 [2024-10-15 14:24:07,890 INFO L226 Difference]: Without dead ends: 263 [2024-10-15 14:24:07,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 26 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:24:07,891 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:24:07,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:24:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-10-15 14:24:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2024-10-15 14:24:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.1598360655737705) internal successors, (283), 244 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2024-10-15 14:24:08,063 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 46 [2024-10-15 14:24:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:24:08,063 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2024-10-15 14:24:08,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:08,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2024-10-15 14:24:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:24:08,064 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:24:08,064 INFO L215 NwaCegarLoop]: trace histogram [18, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:24:08,077 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-15 14:24:08,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-15 14:24:08,265 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:24:08,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1201296938, now seen corresponding path program 34 times [2024-10-15 14:24:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:24:08,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101364629] [2024-10-15 14:24:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:24:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:24:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:08,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:24:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:24:08,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:24:08,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101364629] [2024-10-15 14:24:08,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101364629] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:24:08,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357065720] [2024-10-15 14:24:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:24:08,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:24:08,745 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:24:08,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-15 14:24:08,797 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:24:08,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:24:08,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-15 14:24:08,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:24:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:24:09,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:24:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-10-15 14:24:09,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357065720] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:24:09,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:24:09,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 53 [2024-10-15 14:24:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947471147] [2024-10-15 14:24:09,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:24:09,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-15 14:24:09,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:24:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-15 14:24:09,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2024-10-15 14:24:09,626 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:24:15,628 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2024-10-15 14:24:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-10-15 14:24:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-10-15 14:24:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:24:15,630 INFO L225 Difference]: With dead ends: 319 [2024-10-15 14:24:15,630 INFO L226 Difference]: Without dead ends: 279 [2024-10-15 14:24:15,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5249 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1655, Invalid=19225, Unknown=0, NotChecked=0, Total=20880 [2024-10-15 14:24:15,632 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:24:15,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 618 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:24:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-10-15 14:24:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2024-10-15 14:24:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.13671875) internal successors, (291), 256 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2024-10-15 14:24:15,865 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 46 [2024-10-15 14:24:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:24:15,865 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2024-10-15 14:24:15,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:15,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2024-10-15 14:24:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 14:24:15,866 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:24:15,866 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:24:15,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-10-15 14:24:16,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-15 14:24:16,067 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:24:16,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash 981523539, now seen corresponding path program 35 times [2024-10-15 14:24:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:24:16,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257479001] [2024-10-15 14:24:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:24:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:24:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:16,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:24:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:24:16,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:24:16,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257479001] [2024-10-15 14:24:16,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257479001] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:24:16,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109961248] [2024-10-15 14:24:16,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:24:16,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:24:16,514 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:24:16,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-15 14:24:16,993 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:24:16,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:24:16,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-15 14:24:16,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:24:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:24:17,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:24:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:24:18,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109961248] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:24:18,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:24:18,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-10-15 14:24:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336408819] [2024-10-15 14:24:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:24:18,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-15 14:24:18,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:24:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-15 14:24:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-10-15 14:24:18,063 INFO L87 Difference]: Start difference. First operand 261 states and 295 transitions. Second operand has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:24:23,801 INFO L93 Difference]: Finished difference Result 549 states and 622 transitions. [2024-10-15 14:24:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-10-15 14:24:23,801 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-10-15 14:24:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:24:23,803 INFO L225 Difference]: With dead ends: 549 [2024-10-15 14:24:23,803 INFO L226 Difference]: Without dead ends: 518 [2024-10-15 14:24:23,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3228, Invalid=13028, Unknown=0, NotChecked=0, Total=16256 [2024-10-15 14:24:23,805 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 368 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:24:23,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 353 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:24:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-10-15 14:24:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 296. [2024-10-15 14:24:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.1443298969072164) internal successors, (333), 291 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 337 transitions. [2024-10-15 14:24:24,029 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 337 transitions. Word has length 47 [2024-10-15 14:24:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:24:24,030 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 337 transitions. [2024-10-15 14:24:24,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:24,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 337 transitions. [2024-10-15 14:24:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:24:24,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:24:24,031 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:24:24,047 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-10-15 14:24:24,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:24,232 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:24:24,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1882278143, now seen corresponding path program 36 times [2024-10-15 14:24:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:24:24,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756498281] [2024-10-15 14:24:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:24:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:24:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:24,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:24:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 14:24:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:24:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756498281] [2024-10-15 14:24:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756498281] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:24:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39168104] [2024-10-15 14:24:24,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:24:24,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:24:24,693 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:24:24,695 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-15 14:24:24,876 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-15 14:24:24,876 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:24:24,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-15 14:24:24,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:24:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 14:24:24,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:24:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 14:24:25,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39168104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:24:25,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:24:25,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-10-15 14:24:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5553286] [2024-10-15 14:24:25,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:24:25,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 14:24:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:24:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 14:24:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:24:25,234 INFO L87 Difference]: Start difference. First operand 296 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:24:25,840 INFO L93 Difference]: Finished difference Result 469 states and 535 transitions. [2024-10-15 14:24:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:24:25,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2024-10-15 14:24:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:24:25,843 INFO L225 Difference]: With dead ends: 469 [2024-10-15 14:24:25,843 INFO L226 Difference]: Without dead ends: 451 [2024-10-15 14:24:25,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 28 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:24:25,844 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:24:25,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 353 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:24:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-10-15 14:24:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 332. [2024-10-15 14:24:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.1590214067278288) internal successors, (379), 327 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2024-10-15 14:24:26,139 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 49 [2024-10-15 14:24:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:24:26,139 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2024-10-15 14:24:26,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:24:26,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2024-10-15 14:24:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 14:24:26,141 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:24:26,141 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:24:26,159 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-10-15 14:24:26,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:26,346 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:24:26,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:24:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 202552438, now seen corresponding path program 37 times [2024-10-15 14:24:26,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:24:26,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307036920] [2024-10-15 14:24:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:24:26,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:24:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:26,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:24:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 14:24:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:24:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307036920] [2024-10-15 14:24:26,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307036920] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:24:26,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364404843] [2024-10-15 14:24:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:24:26,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:24:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:24:26,752 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:24:26,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-10-15 14:24:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:24:26,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:24:26,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:24:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 14:24:26,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:24:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-15 14:24:27,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364404843] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:24:27,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:24:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-10-15 14:24:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538837884] [2024-10-15 14:24:27,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:24:27,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-15 14:24:27,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:24:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-15 14:24:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-10-15 14:24:27,711 INFO L87 Difference]: Start difference. First operand 332 states and 383 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:25:38,077 INFO L93 Difference]: Finished difference Result 693 states and 810 transitions. [2024-10-15 14:25:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2024-10-15 14:25:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-10-15 14:25:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:25:38,080 INFO L225 Difference]: With dead ends: 693 [2024-10-15 14:25:38,080 INFO L226 Difference]: Without dead ends: 586 [2024-10-15 14:25:38,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41658 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=16448, Invalid=90154, Unknown=0, NotChecked=0, Total=106602 [2024-10-15 14:25:38,084 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1728 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:25:38,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 335 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-15 14:25:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-10-15 14:25:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2024-10-15 14:25:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.158682634730539) internal successors, (387), 334 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 391 transitions. [2024-10-15 14:25:38,400 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 391 transitions. Word has length 50 [2024-10-15 14:25:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:25:38,401 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 391 transitions. [2024-10-15 14:25:38,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:38,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:25:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 391 transitions. [2024-10-15 14:25:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:25:38,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:25:38,402 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:25:38,415 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-10-15 14:25:38,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:25:38,605 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:25:38,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:25:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -436609882, now seen corresponding path program 38 times [2024-10-15 14:25:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:25:38,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805714463] [2024-10-15 14:25:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:25:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:25:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:25:39,039 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:25:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:25:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-15 14:25:39,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:25:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805714463] [2024-10-15 14:25:39,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805714463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:25:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096874340] [2024-10-15 14:25:39,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:25:39,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:25:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:25:39,042 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:25:39,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-10-15 14:25:39,104 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:25:39,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:25:39,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-15 14:25:39,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:25:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-15 14:25:39,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:25:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-15 14:25:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096874340] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:25:39,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:25:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2024-10-15 14:25:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55468727] [2024-10-15 14:25:39,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:25:39,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:25:39,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:25:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:25:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:25:39,467 INFO L87 Difference]: Start difference. First operand 339 states and 391 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:25:40,073 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2024-10-15 14:25:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:25:40,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-10-15 14:25:40,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:25:40,075 INFO L225 Difference]: With dead ends: 424 [2024-10-15 14:25:40,075 INFO L226 Difference]: Without dead ends: 405 [2024-10-15 14:25:40,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 30 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:25:40,076 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:25:40,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 399 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:25:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-10-15 14:25:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 351. [2024-10-15 14:25:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.1618497109826589) internal successors, (402), 346 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2024-10-15 14:25:40,479 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 52 [2024-10-15 14:25:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:25:40,480 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2024-10-15 14:25:40,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:40,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:25:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2024-10-15 14:25:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:25:40,481 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:25:40,481 INFO L215 NwaCegarLoop]: trace histogram [22, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:25:40,497 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-10-15 14:25:40,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-10-15 14:25:40,681 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:25:40,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:25:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash -428518713, now seen corresponding path program 39 times [2024-10-15 14:25:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:25:40,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399703574] [2024-10-15 14:25:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:25:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:25:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:25:41,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:25:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:25:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:25:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:25:41,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399703574] [2024-10-15 14:25:41,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399703574] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:25:41,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968673895] [2024-10-15 14:25:41,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:25:41,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:25:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:25:41,436 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:25:41,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-10-15 14:25:41,507 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 14:25:41,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:25:41,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:25:41,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:25:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-15 14:25:42,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:25:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-15 14:25:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968673895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:25:42,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:25:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20, 20] total 61 [2024-10-15 14:25:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091749596] [2024-10-15 14:25:42,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:25:42,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-15 14:25:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:25:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-15 14:25:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2024-10-15 14:25:42,817 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:25:56,080 INFO L93 Difference]: Finished difference Result 501 states and 611 transitions. [2024-10-15 14:25:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2024-10-15 14:25:56,081 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-10-15 14:25:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:25:56,082 INFO L225 Difference]: With dead ends: 501 [2024-10-15 14:25:56,082 INFO L226 Difference]: Without dead ends: 425 [2024-10-15 14:25:56,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16165 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=3240, Invalid=54120, Unknown=0, NotChecked=0, Total=57360 [2024-10-15 14:25:56,085 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 6824 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 7011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 6824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:25:56,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 854 Invalid, 7011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 6824 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-10-15 14:25:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-10-15 14:25:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 370. [2024-10-15 14:25:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1424657534246576) internal successors, (417), 365 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 421 transitions. [2024-10-15 14:25:56,413 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 421 transitions. Word has length 52 [2024-10-15 14:25:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:25:56,413 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 421 transitions. [2024-10-15 14:25:56,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:25:56,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:25:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 421 transitions. [2024-10-15 14:25:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 14:25:56,414 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:25:56,414 INFO L215 NwaCegarLoop]: trace histogram [23, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:25:56,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-10-15 14:25:56,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:25:56,615 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:25:56,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:25:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1732839874, now seen corresponding path program 40 times [2024-10-15 14:25:56,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:25:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462866471] [2024-10-15 14:25:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:25:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:25:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:25:57,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:25:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:25:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:25:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:25:57,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462866471] [2024-10-15 14:25:57,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462866471] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:25:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154580354] [2024-10-15 14:25:57,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:25:57,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:25:57,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:25:57,387 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:25:57,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-10-15 14:25:57,449 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:25:57,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:25:57,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-15 14:25:57,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:25:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:25:57,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:25:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-15 14:25:58,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154580354] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:25:58,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:25:58,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 20] total 63 [2024-10-15 14:25:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018236569] [2024-10-15 14:25:58,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:25:58,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-15 14:25:58,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:25:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-15 14:25:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2024-10-15 14:25:58,432 INFO L87 Difference]: Start difference. First operand 370 states and 421 transitions. Second operand has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:26:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:26:03,032 INFO L93 Difference]: Finished difference Result 720 states and 838 transitions. [2024-10-15 14:26:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-10-15 14:26:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2024-10-15 14:26:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:26:03,036 INFO L225 Difference]: With dead ends: 720 [2024-10-15 14:26:03,036 INFO L226 Difference]: Without dead ends: 702 [2024-10-15 14:26:03,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5119, Invalid=15761, Unknown=0, NotChecked=0, Total=20880 [2024-10-15 14:26:03,037 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 576 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:26:03,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 787 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:26:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-10-15 14:26:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 376. [2024-10-15 14:26:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.1320754716981132) internal successors, (420), 371 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:26:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 424 transitions. [2024-10-15 14:26:03,351 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 424 transitions. Word has length 53 [2024-10-15 14:26:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:26:03,351 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 424 transitions. [2024-10-15 14:26:03,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:26:03,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:26:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 424 transitions. [2024-10-15 14:26:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:26:03,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:26:03,353 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:26:03,365 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-10-15 14:26:03,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:26:03,553 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:26:03,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:26:03,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1452158177, now seen corresponding path program 41 times [2024-10-15 14:26:03,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:26:03,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957766324] [2024-10-15 14:26:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:26:03,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:26:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:26:03,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:26:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:26:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-15 14:26:03,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:26:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957766324] [2024-10-15 14:26:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957766324] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:26:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437084039] [2024-10-15 14:26:03,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:26:03,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:26:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:26:03,998 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:26:03,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-10-15 14:26:04,704 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-15 14:26:04,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:26:04,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-15 14:26:04,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:26:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-15 14:26:04,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:26:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-15 14:26:05,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437084039] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:26:05,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:26:05,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2024-10-15 14:26:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033627266] [2024-10-15 14:26:05,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:26:05,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:26:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:26:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:26:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:26:05,139 INFO L87 Difference]: Start difference. First operand 376 states and 424 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:26:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:26:05,920 INFO L93 Difference]: Finished difference Result 459 states and 516 transitions. [2024-10-15 14:26:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 14:26:05,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-10-15 14:26:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:26:05,923 INFO L225 Difference]: With dead ends: 459 [2024-10-15 14:26:05,923 INFO L226 Difference]: Without dead ends: 439 [2024-10-15 14:26:05,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 32 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:26:05,924 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:26:05,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 470 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:26:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-10-15 14:26:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 388. [2024-10-15 14:26:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.133159268929504) internal successors, (434), 383 states have internal predecessors, (434), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:26:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 438 transitions. [2024-10-15 14:26:06,253 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 438 transitions. Word has length 55 [2024-10-15 14:26:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:26:06,253 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 438 transitions. [2024-10-15 14:26:06,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:26:06,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:26:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 438 transitions. [2024-10-15 14:26:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:26:06,254 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:26:06,254 INFO L215 NwaCegarLoop]: trace histogram [24, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:26:06,266 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-10-15 14:26:06,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-10-15 14:26:06,455 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:26:06,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:26:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1240281910, now seen corresponding path program 42 times [2024-10-15 14:26:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:26:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971745800] [2024-10-15 14:26:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:26:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:26:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:26:07,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:26:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:26:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:26:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:26:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971745800] [2024-10-15 14:26:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971745800] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:26:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47423246] [2024-10-15 14:26:07,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:26:07,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:26:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:26:07,054 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:26:07,055 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-10-15 14:26:07,266 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-10-15 14:26:07,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:26:07,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-15 14:26:07,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:26:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-10-15 14:26:07,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:26:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-10-15 14:26:08,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47423246] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:26:08,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:26:08,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 67 [2024-10-15 14:26:08,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115001062] [2024-10-15 14:26:08,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:26:08,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-10-15 14:26:08,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:26:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-10-15 14:26:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4142, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 14:26:08,856 INFO L87 Difference]: Start difference. First operand 388 states and 438 transitions. Second operand has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)