./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_05.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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/eureka_05.i -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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:17:11,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:17:11,905 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:17:11,911 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:17:11,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:17:11,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:17:11,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:17:11,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:17:11,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:17:11,945 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:17:11,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:17:11,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:17:11,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:17:11,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:17:11,949 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:17:11,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:17:11,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:17:11,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:17:11,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:17:11,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:17:11,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:17:11,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:17:11,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:17:11,955 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:17:11,956 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:17:11,956 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:17:11,956 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:17:11,956 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:17:11,957 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:17:11,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:17:11,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:17:11,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:17:11,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:17:11,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:17:11,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:17:11,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:17:11,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:17:11,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:17:11,959 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:17:11,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:17:11,959 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:17:11,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:17:11,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:17:12,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:17:12,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:17:12,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:17:12,275 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:17:12,275 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:17:12,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_05.i [2024-09-11 19:17:13,608 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:17:13,833 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:17:13,834 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i [2024-09-11 19:17:13,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4728112b0/e3784c0ae7fd435f8752cbfedc1c1818/FLAG73e63b2f0 [2024-09-11 19:17:14,207 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4728112b0/e3784c0ae7fd435f8752cbfedc1c1818 [2024-09-11 19:17:14,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:17:14,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:17:14,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:17:14,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:17:14,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:17:14,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@930f693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14, skipping insertion in model container [2024-09-11 19:17:14,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,247 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:17:14,401 WARN L247 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/eureka_05.i[810,823] [2024-09-11 19:17:14,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:17:14,432 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:17:14,444 WARN L247 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/eureka_05.i[810,823] [2024-09-11 19:17:14,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:17:14,488 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:17:14,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14 WrapperNode [2024-09-11 19:17:14,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:17:14,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:17:14,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:17:14,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:17:14,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,511 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,534 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-09-11 19:17:14,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:17:14,535 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:17:14,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:17:14,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:17:14,545 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,553 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,577 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 11, 2]. 73 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-09-11 19:17:14,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,598 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:17:14,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:17:14,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:17:14,606 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:17:14,607 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (1/1) ... [2024-09-11 19:17:14,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:17:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:14,644 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) [2024-09-11 19:17:14,647 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 [2024-09-11 19:17:14,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:17:14,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:17:14,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 19:17:14,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 19:17:14,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 19:17:14,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 19:17:14,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 19:17:14,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 19:17:14,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:17:14,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:17:14,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 19:17:14,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 19:17:14,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 19:17:14,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 19:17:14,775 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:17:14,777 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:17:15,013 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-11 19:17:15,013 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:17:15,046 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:17:15,046 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-11 19:17:15,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:17:15 BoogieIcfgContainer [2024-09-11 19:17:15,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:17:15,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:17:15,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:17:15,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:17:15,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:17:14" (1/3) ... [2024-09-11 19:17:15,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a38f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:17:15, skipping insertion in model container [2024-09-11 19:17:15,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:17:14" (2/3) ... [2024-09-11 19:17:15,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a38f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:17:15, skipping insertion in model container [2024-09-11 19:17:15,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:17:15" (3/3) ... [2024-09-11 19:17:15,055 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2024-09-11 19:17:15,070 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:17:15,071 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:17:15,119 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:17:15,125 INFO L336 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;@6e711ffc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:17:15,125 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:17:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:17:15,135 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:15,136 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:15,137 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:15,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash -831585943, now seen corresponding path program 1 times [2024-09-11 19:17:15,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:15,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884267598] [2024-09-11 19:17:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:15,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:17:15,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:15,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884267598] [2024-09-11 19:17:15,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884267598] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:17:15,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:17:15,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:17:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169596471] [2024-09-11 19:17:15,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:17:15,393 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 19:17:15,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 19:17:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:17:15,417 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:15,466 INFO L93 Difference]: Finished difference Result 31 states and 49 transitions. [2024-09-11 19:17:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 19:17:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:17:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:15,479 INFO L225 Difference]: With dead ends: 31 [2024-09-11 19:17:15,480 INFO L226 Difference]: Without dead ends: 15 [2024-09-11 19:17:15,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 19:17:15,486 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:15,487 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-11 19:17:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-11 19:17:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-09-11 19:17:15,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2024-09-11 19:17:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:15,514 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-09-11 19:17:15,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-09-11 19:17:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 19:17:15,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:15,516 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:15,517 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:17:15,517 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:15,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:15,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1273734631, now seen corresponding path program 1 times [2024-09-11 19:17:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:15,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156257914] [2024-09-11 19:17:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:17:15,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156257914] [2024-09-11 19:17:15,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156257914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458979052] [2024-09-11 19:17:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:15,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:15,614 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) [2024-09-11 19:17:15,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:17:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:15,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-11 19:17:15,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:17:15,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:17:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458979052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:15,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-09-11 19:17:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642297935] [2024-09-11 19:17:15,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:15,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:17:15,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:17:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:17:15,782 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:15,829 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2024-09-11 19:17:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:17:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-11 19:17:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:15,830 INFO L225 Difference]: With dead ends: 35 [2024-09-11 19:17:15,830 INFO L226 Difference]: Without dead ends: 23 [2024-09-11 19:17:15,831 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:17:15,833 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:15,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-11 19:17:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2024-09-11 19:17:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-09-11 19:17:15,843 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2024-09-11 19:17:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:15,843 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-09-11 19:17:15,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:15,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-09-11 19:17:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-11 19:17:15,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:15,845 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:15,859 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:17:16,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:16,046 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:16,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1185436311, now seen corresponding path program 2 times [2024-09-11 19:17:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873920003] [2024-09-11 19:17:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:17:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873920003] [2024-09-11 19:17:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873920003] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:17:16,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:17:16,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 19:17:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485751036] [2024-09-11 19:17:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:17:16,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-11 19:17:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-11 19:17:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:17:16,212 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:16,242 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-09-11 19:17:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 19:17:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-09-11 19:17:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:16,243 INFO L225 Difference]: With dead ends: 29 [2024-09-11 19:17:16,243 INFO L226 Difference]: Without dead ends: 23 [2024-09-11 19:17:16,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-11 19:17:16,245 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:16,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-11 19:17:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2024-09-11 19:17:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-09-11 19:17:16,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2024-09-11 19:17:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:16,252 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-09-11 19:17:16,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-09-11 19:17:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:17:16,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:16,253 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:16,254 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 19:17:16,254 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:16,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1895147126, now seen corresponding path program 1 times [2024-09-11 19:17:16,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:16,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774481570] [2024-09-11 19:17:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:16,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:17:16,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:16,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774481570] [2024-09-11 19:17:16,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774481570] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:17:16,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:17:16,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-11 19:17:16,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965851943] [2024-09-11 19:17:16,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:17:16,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:17:16,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:16,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:17:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:17:16,354 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:16,421 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2024-09-11 19:17:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:17:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-09-11 19:17:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:16,423 INFO L225 Difference]: With dead ends: 37 [2024-09-11 19:17:16,423 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 19:17:16,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:17:16,424 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:16,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 22 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 19:17:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2024-09-11 19:17:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-09-11 19:17:16,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2024-09-11 19:17:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:16,432 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-09-11 19:17:16,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-09-11 19:17:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-11 19:17:16,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:16,434 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:16,434 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-11 19:17:16,434 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:16,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 71753960, now seen corresponding path program 1 times [2024-09-11 19:17:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:16,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855781594] [2024-09-11 19:17:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-11 19:17:16,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:16,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855781594] [2024-09-11 19:17:16,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855781594] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:16,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882750329] [2024-09-11 19:17:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:16,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:16,583 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) [2024-09-11 19:17:16,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:17:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:16,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-11 19:17:16,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:17:16,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:17:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882750329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:16,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:16,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 9 [2024-09-11 19:17:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146800073] [2024-09-11 19:17:16,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:16,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:17:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:17:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:17:16,777 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:16,950 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2024-09-11 19:17:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:17:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-09-11 19:17:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:16,951 INFO L225 Difference]: With dead ends: 64 [2024-09-11 19:17:16,951 INFO L226 Difference]: Without dead ends: 50 [2024-09-11 19:17:16,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:17:16,953 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:16,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 72 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:17:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-11 19:17:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2024-09-11 19:17:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-09-11 19:17:16,963 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 18 [2024-09-11 19:17:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:16,963 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-09-11 19:17:16,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-09-11 19:17:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:17:16,964 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:16,965 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:16,983 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:17:17,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:17,170 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:17,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1969768187, now seen corresponding path program 2 times [2024-09-11 19:17:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62294486] [2024-09-11 19:17:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:17,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 19:17:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62294486] [2024-09-11 19:17:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62294486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199317648] [2024-09-11 19:17:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:17:17,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:17,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:17,283 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) [2024-09-11 19:17:17,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:17:17,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:17:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:17,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-11 19:17:17,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-11 19:17:17,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-11 19:17:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199317648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:17,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:17,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-09-11 19:17:17,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684247345] [2024-09-11 19:17:17,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:17,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:17:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:17:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:17:17,500 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:17,756 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2024-09-11 19:17:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:17:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-09-11 19:17:17,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:17,759 INFO L225 Difference]: With dead ends: 68 [2024-09-11 19:17:17,760 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 19:17:17,761 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:17:17,762 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:17,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 26 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:17:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 19:17:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-11 19:17:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2024-09-11 19:17:17,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 22 [2024-09-11 19:17:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:17,786 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2024-09-11 19:17:17,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:17,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2024-09-11 19:17:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-11 19:17:17,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:17,788 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:17,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:17:17,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 19:17:17,989 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:17,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2011435034, now seen corresponding path program 3 times [2024-09-11 19:17:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:17,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804165424] [2024-09-11 19:17:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-11 19:17:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804165424] [2024-09-11 19:17:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804165424] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456182961] [2024-09-11 19:17:18,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:17:18,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:18,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:18,227 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) [2024-09-11 19:17:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:17:18,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 19:17:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:18,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:17:18,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:18,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 19:17:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-11 19:17:18,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:17:18,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456182961] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:17:18,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:17:18,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-09-11 19:17:18,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585911121] [2024-09-11 19:17:18,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:17:18,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:17:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:17:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:17:18,524 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:18,604 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-09-11 19:17:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:17:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-09-11 19:17:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:18,606 INFO L225 Difference]: With dead ends: 56 [2024-09-11 19:17:18,607 INFO L226 Difference]: Without dead ends: 54 [2024-09-11 19:17:18,607 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:17:18,608 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:18,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-11 19:17:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-09-11 19:17:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-09-11 19:17:18,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 49 [2024-09-11 19:17:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:18,636 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-09-11 19:17:18,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:18,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-09-11 19:17:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-11 19:17:18,637 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:18,637 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:18,658 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:17:18,838 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:18,838 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:18,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash -717345774, now seen corresponding path program 1 times [2024-09-11 19:17:18,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:18,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309361739] [2024-09-11 19:17:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:18,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 19:17:19,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309361739] [2024-09-11 19:17:19,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309361739] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249333074] [2024-09-11 19:17:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:19,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:19,010 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) [2024-09-11 19:17:19,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:17:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:19,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-11 19:17:19,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 19:17:19,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 19:17:19,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249333074] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:19,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-09-11 19:17:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182135679] [2024-09-11 19:17:19,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:19,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:17:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:17:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:17:19,413 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:19,497 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2024-09-11 19:17:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 19:17:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-09-11 19:17:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:19,501 INFO L225 Difference]: With dead ends: 71 [2024-09-11 19:17:19,501 INFO L226 Difference]: Without dead ends: 63 [2024-09-11 19:17:19,502 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:17:19,502 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:19,503 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-11 19:17:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-11 19:17:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2024-09-11 19:17:19,528 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 52 [2024-09-11 19:17:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:19,528 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2024-09-11 19:17:19,528 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:19,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2024-09-11 19:17:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-11 19:17:19,530 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:19,530 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:19,548 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:17:19,734 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-11 19:17:19,735 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:19,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1920110706, now seen corresponding path program 2 times [2024-09-11 19:17:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:19,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075107107] [2024-09-11 19:17:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-11 19:17:19,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075107107] [2024-09-11 19:17:19,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075107107] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933575338] [2024-09-11 19:17:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:17:19,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:19,950 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) [2024-09-11 19:17:19,952 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:17:20,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:17:20,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:20,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:17:20,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-11 19:17:20,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-11 19:17:20,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933575338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:20,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:20,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-11 19:17:20,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928459036] [2024-09-11 19:17:20,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:20,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 19:17:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:20,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 19:17:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:17:20,364 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:20,539 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2024-09-11 19:17:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:17:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-09-11 19:17:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:20,540 INFO L225 Difference]: With dead ends: 81 [2024-09-11 19:17:20,540 INFO L226 Difference]: Without dead ends: 66 [2024-09-11 19:17:20,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:17:20,541 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:20,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 42 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:17:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-11 19:17:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-09-11 19:17:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2024-09-11 19:17:20,557 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 58 [2024-09-11 19:17:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:20,558 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2024-09-11 19:17:20,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:20,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2024-09-11 19:17:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-11 19:17:20,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:20,559 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:20,576 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 19:17:20,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:20,760 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:20,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1527735826, now seen corresponding path program 3 times [2024-09-11 19:17:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:20,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669917145] [2024-09-11 19:17:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2024-09-11 19:17:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669917145] [2024-09-11 19:17:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669917145] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942975591] [2024-09-11 19:17:21,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:17:21,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:21,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:21,584 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) [2024-09-11 19:17:21,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:17:21,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:17:21,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:21,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-11 19:17:21,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:21,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-11 19:17:21,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2024-09-11 19:17:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-11 19:17:22,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-11 19:17:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942975591] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:22,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 25 [2024-09-11 19:17:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168325247] [2024-09-11 19:17:22,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:22,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 19:17:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 19:17:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:17:22,506 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:23,180 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2024-09-11 19:17:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:17:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-09-11 19:17:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:23,181 INFO L225 Difference]: With dead ends: 85 [2024-09-11 19:17:23,181 INFO L226 Difference]: Without dead ends: 83 [2024-09-11 19:17:23,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 19:17:23,183 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:23,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 189 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:17:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-11 19:17:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2024-09-11 19:17:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2024-09-11 19:17:23,208 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 61 [2024-09-11 19:17:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:23,209 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2024-09-11 19:17:23,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:23,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2024-09-11 19:17:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 19:17:23,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:23,210 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:23,229 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-11 19:17:23,411 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:23,411 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:23,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -985173222, now seen corresponding path program 4 times [2024-09-11 19:17:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569263670] [2024-09-11 19:17:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2024-09-11 19:17:24,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569263670] [2024-09-11 19:17:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569263670] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930452985] [2024-09-11 19:17:24,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:17:24,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:24,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:24,495 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) [2024-09-11 19:17:24,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:17:24,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:17:24,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:24,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 19:17:24,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:24,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:17:24,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 31 [2024-09-11 19:17:25,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:17:25,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 22 [2024-09-11 19:17:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 19:17:25,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:26,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 243 [2024-09-11 19:17:26,612 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2024-09-11 19:17:26,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 291 treesize of output 258 [2024-09-11 19:17:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 19:17:28,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930452985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:28,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:28,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 18] total 48 [2024-09-11 19:17:28,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927978367] [2024-09-11 19:17:28,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:28,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-11 19:17:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-11 19:17:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2024-09-11 19:17:28,665 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:38,057 INFO L93 Difference]: Finished difference Result 388 states and 528 transitions. [2024-09-11 19:17:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-11 19:17:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-09-11 19:17:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:38,061 INFO L225 Difference]: With dead ends: 388 [2024-09-11 19:17:38,061 INFO L226 Difference]: Without dead ends: 352 [2024-09-11 19:17:38,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1688, Invalid=14314, Unknown=0, NotChecked=0, Total=16002 [2024-09-11 19:17:38,069 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 352 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:38,069 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 225 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-11 19:17:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-09-11 19:17:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 218. [2024-09-11 19:17:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.3963133640552996) internal successors, (303), 217 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 303 transitions. [2024-09-11 19:17:38,212 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 303 transitions. Word has length 64 [2024-09-11 19:17:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:38,212 INFO L474 AbstractCegarLoop]: Abstraction has 218 states and 303 transitions. [2024-09-11 19:17:38,213 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 303 transitions. [2024-09-11 19:17:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-11 19:17:38,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:38,215 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:38,233 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 19:17:38,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:38,418 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:38,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2121947600, now seen corresponding path program 1 times [2024-09-11 19:17:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:38,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525616857] [2024-09-11 19:17:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-11 19:17:38,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:38,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525616857] [2024-09-11 19:17:38,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525616857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:38,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303580206] [2024-09-11 19:17:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:38,780 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) [2024-09-11 19:17:38,781 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:17:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:38,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:17:38,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:39,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:17:39,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2024-09-11 19:17:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-09-11 19:17:39,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-09-11 19:17:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303580206] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:39,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:39,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2024-09-11 19:17:39,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931656405] [2024-09-11 19:17:39,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:39,422 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:17:39,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:39,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:17:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:17:39,424 INFO L87 Difference]: Start difference. First operand 218 states and 303 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:40,030 INFO L93 Difference]: Finished difference Result 417 states and 575 transitions. [2024-09-11 19:17:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:17:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-09-11 19:17:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:40,033 INFO L225 Difference]: With dead ends: 417 [2024-09-11 19:17:40,033 INFO L226 Difference]: Without dead ends: 225 [2024-09-11 19:17:40,034 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:17:40,034 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:40,035 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 87 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:17:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-11 19:17:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 202. [2024-09-11 19:17:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.3880597014925373) internal successors, (279), 201 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 279 transitions. [2024-09-11 19:17:40,124 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 279 transitions. Word has length 67 [2024-09-11 19:17:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:40,124 INFO L474 AbstractCegarLoop]: Abstraction has 202 states and 279 transitions. [2024-09-11 19:17:40,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:40,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 279 transitions. [2024-09-11 19:17:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-11 19:17:40,126 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:40,126 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:40,140 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 19:17:40,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 19:17:40,327 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:40,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:40,327 INFO L85 PathProgramCache]: Analyzing trace with hash 969380496, now seen corresponding path program 2 times [2024-09-11 19:17:40,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:40,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442927946] [2024-09-11 19:17:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:40,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-11 19:17:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:40,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442927946] [2024-09-11 19:17:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442927946] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:17:40,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:17:40,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:17:40,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903898214] [2024-09-11 19:17:40,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:17:40,629 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:17:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:17:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:17:40,630 INFO L87 Difference]: Start difference. First operand 202 states and 279 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:40,771 INFO L93 Difference]: Finished difference Result 336 states and 472 transitions. [2024-09-11 19:17:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:17:40,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-09-11 19:17:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:40,773 INFO L225 Difference]: With dead ends: 336 [2024-09-11 19:17:40,773 INFO L226 Difference]: Without dead ends: 156 [2024-09-11 19:17:40,774 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:17:40,775 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:40,775 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:17:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-09-11 19:17:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-09-11 19:17:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.4064516129032258) internal successors, (218), 155 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 218 transitions. [2024-09-11 19:17:40,887 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 218 transitions. Word has length 67 [2024-09-11 19:17:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:40,887 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 218 transitions. [2024-09-11 19:17:40,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:40,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 218 transitions. [2024-09-11 19:17:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-11 19:17:40,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:40,889 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:40,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-11 19:17:40,890 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:40,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1748645526, now seen corresponding path program 3 times [2024-09-11 19:17:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:40,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685746875] [2024-09-11 19:17:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 130 proven. 17 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-11 19:17:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685746875] [2024-09-11 19:17:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685746875] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277383365] [2024-09-11 19:17:41,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:17:41,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:41,407 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) [2024-09-11 19:17:41,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:17:41,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:17:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:41,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 19:17:41,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:41,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 19:17:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-11 19:17:41,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-09-11 19:17:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-11 19:17:41,668 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2024-09-11 19:17:41,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-09-11 19:17:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-11 19:17:41,755 INFO L349 Elim1Store]: treesize reduction 68, result has 27.7 percent of original size [2024-09-11 19:17:41,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2024-09-11 19:17:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2024-09-11 19:17:42,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:43,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-09-11 19:17:43,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2024-09-11 19:17:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 19:17:43,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277383365] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:43,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:43,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2024-09-11 19:17:43,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797091260] [2024-09-11 19:17:43,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:43,054 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-11 19:17:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-11 19:17:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:17:43,055 INFO L87 Difference]: Start difference. First operand 156 states and 218 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:17:44,310 INFO L93 Difference]: Finished difference Result 305 states and 429 transitions. [2024-09-11 19:17:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 19:17:44,310 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-09-11 19:17:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:17:44,312 INFO L225 Difference]: With dead ends: 305 [2024-09-11 19:17:44,312 INFO L226 Difference]: Without dead ends: 183 [2024-09-11 19:17:44,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=2324, Unknown=0, NotChecked=0, Total=2756 [2024-09-11 19:17:44,314 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:17:44,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 257 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:17:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-11 19:17:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 168. [2024-09-11 19:17:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3892215568862276) internal successors, (232), 167 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2024-09-11 19:17:44,415 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 67 [2024-09-11 19:17:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:17:44,415 INFO L474 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2024-09-11 19:17:44,415 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:17:44,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2024-09-11 19:17:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-11 19:17:44,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:17:44,417 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:17:44,432 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 19:17:44,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:17:44,622 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:17:44,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:17:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1139288344, now seen corresponding path program 4 times [2024-09-11 19:17:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:17:44,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767846257] [2024-09-11 19:17:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:17:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:17:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:17:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 94 proven. 15 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-11 19:17:45,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:17:45,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767846257] [2024-09-11 19:17:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767846257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:17:45,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025418480] [2024-09-11 19:17:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:17:45,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:17:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:17:45,048 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) [2024-09-11 19:17:45,049 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:17:45,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:17:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:17:45,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 19:17:45,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:17:45,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:17:45,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 31 [2024-09-11 19:17:45,681 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-09-11 19:17:45,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 36 [2024-09-11 19:17:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-09-11 19:17:45,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:17:46,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 239 [2024-09-11 19:17:46,734 INFO L349 Elim1Store]: treesize reduction 15, result has 92.4 percent of original size [2024-09-11 19:17:46,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 822 treesize of output 639 [2024-09-11 19:17:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 118 proven. 60 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-09-11 19:17:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025418480] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:17:53,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:17:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 18] total 45 [2024-09-11 19:17:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602059321] [2024-09-11 19:17:53,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:17:53,403 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-11 19:17:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:17:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-11 19:17:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 19:17:53,407 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:00,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-11 19:18:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:18:03,944 INFO L93 Difference]: Finished difference Result 551 states and 780 transitions. [2024-09-11 19:18:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-11 19:18:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-09-11 19:18:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:18:03,947 INFO L225 Difference]: With dead ends: 551 [2024-09-11 19:18:03,947 INFO L226 Difference]: Without dead ends: 436 [2024-09-11 19:18:03,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=814, Invalid=7928, Unknown=0, NotChecked=0, Total=8742 [2024-09-11 19:18:03,951 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 132 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:18:03,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 224 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-09-11 19:18:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-09-11 19:18:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 279. [2024-09-11 19:18:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.4388489208633093) internal successors, (400), 278 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 400 transitions. [2024-09-11 19:18:04,117 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 400 transitions. Word has length 70 [2024-09-11 19:18:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:18:04,117 INFO L474 AbstractCegarLoop]: Abstraction has 279 states and 400 transitions. [2024-09-11 19:18:04,118 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:04,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:18:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 400 transitions. [2024-09-11 19:18:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-11 19:18:04,119 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:18:04,119 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:18:04,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 19:18:04,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:18:04,320 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:18:04,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:18:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1782784104, now seen corresponding path program 5 times [2024-09-11 19:18:04,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:18:04,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498011407] [2024-09-11 19:18:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:18:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:18:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:18:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 2 proven. 215 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 19:18:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:18:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498011407] [2024-09-11 19:18:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498011407] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:18:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126830402] [2024-09-11 19:18:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:18:05,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:18:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:18:05,441 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) [2024-09-11 19:18:05,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:18:05,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-11 19:18:05,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:18:05,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-11 19:18:05,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:18:05,573 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-09-11 19:18:05,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2024-09-11 19:18:05,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:18:05,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 58 [2024-09-11 19:18:06,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:18:06,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 17 [2024-09-11 19:18:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 153 proven. 31 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-11 19:18:06,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:18:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 160 proven. 24 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-11 19:18:06,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126830402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:18:06,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:18:06,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2024-09-11 19:18:06,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020813607] [2024-09-11 19:18:06,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:18:06,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-11 19:18:06,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:18:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-11 19:18:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 19:18:06,672 INFO L87 Difference]: Start difference. First operand 279 states and 400 transitions. Second operand has 44 states, 44 states have (on average 2.5) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:18:12,939 INFO L93 Difference]: Finished difference Result 738 states and 1081 transitions. [2024-09-11 19:18:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-09-11 19:18:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.5) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-09-11 19:18:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:18:12,943 INFO L225 Difference]: With dead ends: 738 [2024-09-11 19:18:12,943 INFO L226 Difference]: Without dead ends: 592 [2024-09-11 19:18:12,948 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6146 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1886, Invalid=20166, Unknown=0, NotChecked=0, Total=22052 [2024-09-11 19:18:12,948 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 240 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:18:12,949 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 364 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-11 19:18:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2024-09-11 19:18:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 388. [2024-09-11 19:18:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.4521963824289406) internal successors, (562), 387 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 562 transitions. [2024-09-11 19:18:13,207 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 562 transitions. Word has length 70 [2024-09-11 19:18:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:18:13,207 INFO L474 AbstractCegarLoop]: Abstraction has 388 states and 562 transitions. [2024-09-11 19:18:13,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.5) internal successors, (110), 44 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:13,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:18:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 562 transitions. [2024-09-11 19:18:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-11 19:18:13,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:18:13,209 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:18:13,220 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 19:18:13,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 19:18:13,409 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:18:13,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:18:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash 577223638, now seen corresponding path program 6 times [2024-09-11 19:18:13,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:18:13,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326066511] [2024-09-11 19:18:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:18:13,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:18:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:18:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-09-11 19:18:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:18:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326066511] [2024-09-11 19:18:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326066511] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:18:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008376170] [2024-09-11 19:18:13,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:18:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:18:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:18:13,525 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) [2024-09-11 19:18:13,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 19:18:13,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-11 19:18:13,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:18:13,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:18:13,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:18:13,832 INFO L349 Elim1Store]: treesize reduction 52, result has 44.7 percent of original size [2024-09-11 19:18:13,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 60 [2024-09-11 19:18:14,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 19:18:14,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 95 [2024-09-11 19:18:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 115 proven. 10 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-09-11 19:18:14,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:18:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 115 proven. 10 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-09-11 19:18:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008376170] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:18:14,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:18:14,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2024-09-11 19:18:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523978764] [2024-09-11 19:18:14,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:18:14,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:18:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:18:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:18:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:18:14,251 INFO L87 Difference]: Start difference. First operand 388 states and 562 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:18:14,823 INFO L93 Difference]: Finished difference Result 650 states and 947 transitions. [2024-09-11 19:18:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 19:18:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-09-11 19:18:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:18:14,824 INFO L225 Difference]: With dead ends: 650 [2024-09-11 19:18:14,824 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:18:14,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:18:14,826 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:18:14,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:18:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:18:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:18:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:18:14,827 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2024-09-11 19:18:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:18:14,828 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:18:14,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:18:14,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:18:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:18:14,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:18:14,831 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:18:14,848 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 19:18:15,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 19:18:15,034 INFO L408 BasicCegarLoop]: Path program histogram: [6, 4, 3, 2, 1, 1] [2024-09-11 19:18:15,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 19:18:26,815 WARN L293 SmtUtils]: Spent 11.77s on a formula simplification. DAG size of input: 830 DAG size of output: 929 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-11 19:18:35,940 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 792 DAG size of output: 878 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)