/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:41:09,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:41:09,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:41:09,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 01:41:09,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:41:09,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:41:09,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:41:09,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:41:09,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:41:09,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:41:09,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:41:09,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:41:09,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:41:09,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:41:09,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:41:09,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:41:09,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 01:41:09,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:41:09,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:41:09,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:41:09,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 01:41:09,852 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:41:09,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:41:09,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:41:09,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:41:09,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:41:09,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:41:09,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:41:09,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:41:09,854 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:41:09,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:41:09,854 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:41:09,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:41:09,855 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:41:09,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:41:09,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:41:09,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:41:09,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:41:09,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:41:09,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:41:09,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:41:09,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:41:09,857 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:41:09,857 INFO L138 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:41:10,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:41:10,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:41:10,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:41:10,112 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:41:10,113 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:41:10,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-03-31 01:41:11,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:41:11,535 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:41:11,535 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-03-31 01:41:11,545 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de9814b6b/82b64f95d3ba4e6abcc28246505c858d/FLAG6c98dcaaa [2023-03-31 01:41:11,566 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de9814b6b/82b64f95d3ba4e6abcc28246505c858d [2023-03-31 01:41:11,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:41:11,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:41:11,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:41:11,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:41:11,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:41:11,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5539a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11, skipping insertion in model container [2023-03-31 01:41:11,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:41:11,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:41:11,790 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-03-31 01:41:11,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:41:11,840 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:41:11,881 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-03-31 01:41:11,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:41:11,930 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:41:11,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11 WrapperNode [2023-03-31 01:41:11,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:41:11,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:41:11,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:41:11,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:41:11,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,993 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:11,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:41:12,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:41:12,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:41:12,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:41:12,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (1/1) ... [2023-03-31 01:41:12,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:41:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:41:12,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 01:41:12,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 01:41:12,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:41:12,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:41:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:41:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:41:12,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:41:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:41:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:41:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:41:12,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:41:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:41:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:41:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:41:12,269 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:41:12,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:41:12,887 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:41:12,903 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:41:12,903 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:41:12,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:41:12 BoogieIcfgContainer [2023-03-31 01:41:12,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:41:12,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:41:12,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:41:12,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:41:12,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:41:11" (1/3) ... [2023-03-31 01:41:12,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bbc789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:41:12, skipping insertion in model container [2023-03-31 01:41:12,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:11" (2/3) ... [2023-03-31 01:41:12,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bbc789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:41:12, skipping insertion in model container [2023-03-31 01:41:12,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:41:12" (3/3) ... [2023-03-31 01:41:12,920 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-03-31 01:41:12,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:41:12,938 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:41:12,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:41:12,993 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@527ae118, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:41:12,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:41:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 134 states have (on average 1.7686567164179106) internal successors, (237), 141 states have internal predecessors, (237), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:41:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-31 01:41:13,008 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:13,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:13,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:13,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2025769354, now seen corresponding path program 1 times [2023-03-31 01:41:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873014621] [2023-03-31 01:41:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:13,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873014621] [2023-03-31 01:41:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873014621] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386756675] [2023-03-31 01:41:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:13,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:13,807 INFO L87 Difference]: Start difference. First operand has 146 states, 134 states have (on average 1.7686567164179106) internal successors, (237), 141 states have internal predecessors, (237), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:14,850 INFO L93 Difference]: Finished difference Result 311 states and 498 transitions. [2023-03-31 01:41:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-03-31 01:41:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:14,861 INFO L225 Difference]: With dead ends: 311 [2023-03-31 01:41:14,861 INFO L226 Difference]: Without dead ends: 204 [2023-03-31 01:41:14,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:14,868 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 135 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:14,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 506 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 01:41:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-03-31 01:41:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2023-03-31 01:41:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.5252525252525253) internal successors, (302), 198 states have internal predecessors, (302), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 305 transitions. [2023-03-31 01:41:14,920 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 305 transitions. Word has length 61 [2023-03-31 01:41:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:14,921 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 305 transitions. [2023-03-31 01:41:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 305 transitions. [2023-03-31 01:41:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-31 01:41:14,924 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:14,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:14,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:41:14,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:14,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1365260102, now seen corresponding path program 1 times [2023-03-31 01:41:14,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:14,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234788625] [2023-03-31 01:41:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234788625] [2023-03-31 01:41:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234788625] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:15,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483679496] [2023-03-31 01:41:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:15,270 INFO L87 Difference]: Start difference. First operand 202 states and 305 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:15,987 INFO L93 Difference]: Finished difference Result 339 states and 524 transitions. [2023-03-31 01:41:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-03-31 01:41:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:15,991 INFO L225 Difference]: With dead ends: 339 [2023-03-31 01:41:15,991 INFO L226 Difference]: Without dead ends: 262 [2023-03-31 01:41:15,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:15,993 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 111 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:15,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 452 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:41:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-03-31 01:41:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2023-03-31 01:41:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.5390625) internal successors, (394), 256 states have internal predecessors, (394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 397 transitions. [2023-03-31 01:41:16,022 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 397 transitions. Word has length 63 [2023-03-31 01:41:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:16,022 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 397 transitions. [2023-03-31 01:41:16,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 397 transitions. [2023-03-31 01:41:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-31 01:41:16,024 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:16,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:41:16,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:16,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1576380541, now seen corresponding path program 1 times [2023-03-31 01:41:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:16,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015751726] [2023-03-31 01:41:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:16,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015751726] [2023-03-31 01:41:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015751726] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872957646] [2023-03-31 01:41:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:16,313 INFO L87 Difference]: Start difference. First operand 260 states and 397 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:16,870 INFO L93 Difference]: Finished difference Result 639 states and 996 transitions. [2023-03-31 01:41:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-03-31 01:41:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:16,873 INFO L225 Difference]: With dead ends: 639 [2023-03-31 01:41:16,873 INFO L226 Difference]: Without dead ends: 439 [2023-03-31 01:41:16,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:16,875 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 105 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:16,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 371 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-03-31 01:41:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 437. [2023-03-31 01:41:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 433 states have (on average 1.5473441108545034) internal successors, (670), 433 states have internal predecessors, (670), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 673 transitions. [2023-03-31 01:41:16,914 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 673 transitions. Word has length 63 [2023-03-31 01:41:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:16,915 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 673 transitions. [2023-03-31 01:41:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 673 transitions. [2023-03-31 01:41:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 01:41:16,917 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:16,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:16,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:41:16,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:16,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 912235862, now seen corresponding path program 1 times [2023-03-31 01:41:16,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625368509] [2023-03-31 01:41:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:16,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:17,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:17,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625368509] [2023-03-31 01:41:17,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625368509] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:17,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:17,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135590193] [2023-03-31 01:41:17,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:17,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:17,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:17,202 INFO L87 Difference]: Start difference. First operand 437 states and 673 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:17,755 INFO L93 Difference]: Finished difference Result 1149 states and 1785 transitions. [2023-03-31 01:41:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-03-31 01:41:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:17,759 INFO L225 Difference]: With dead ends: 1149 [2023-03-31 01:41:17,759 INFO L226 Difference]: Without dead ends: 772 [2023-03-31 01:41:17,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:17,770 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 100 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:17,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 372 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-03-31 01:41:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 770. [2023-03-31 01:41:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 766 states have (on average 1.5404699738903394) internal successors, (1180), 766 states have internal predecessors, (1180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1183 transitions. [2023-03-31 01:41:17,838 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1183 transitions. Word has length 65 [2023-03-31 01:41:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:17,840 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1183 transitions. [2023-03-31 01:41:17,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1183 transitions. [2023-03-31 01:41:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 01:41:17,848 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:17,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:17,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:41:17,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:17,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -92769245, now seen corresponding path program 1 times [2023-03-31 01:41:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791885177] [2023-03-31 01:41:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:18,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791885177] [2023-03-31 01:41:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791885177] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:18,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:18,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:18,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248023760] [2023-03-31 01:41:18,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:18,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:18,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:18,173 INFO L87 Difference]: Start difference. First operand 770 states and 1183 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:18,945 INFO L93 Difference]: Finished difference Result 3535 states and 5539 transitions. [2023-03-31 01:41:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:41:18,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-03-31 01:41:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:18,960 INFO L225 Difference]: With dead ends: 3535 [2023-03-31 01:41:18,960 INFO L226 Difference]: Without dead ends: 2805 [2023-03-31 01:41:18,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 01:41:18,964 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 894 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:18,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 981 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2023-03-31 01:41:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1385. [2023-03-31 01:41:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1381 states have (on average 1.554670528602462) internal successors, (2147), 1381 states have internal predecessors, (2147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2150 transitions. [2023-03-31 01:41:19,096 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2150 transitions. Word has length 67 [2023-03-31 01:41:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:19,096 INFO L495 AbstractCegarLoop]: Abstraction has 1385 states and 2150 transitions. [2023-03-31 01:41:19,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2150 transitions. [2023-03-31 01:41:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 01:41:19,097 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:19,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:41:19,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:19,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1357510239, now seen corresponding path program 1 times [2023-03-31 01:41:19,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:19,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512147625] [2023-03-31 01:41:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:19,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512147625] [2023-03-31 01:41:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512147625] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13688214] [2023-03-31 01:41:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:19,369 INFO L87 Difference]: Start difference. First operand 1385 states and 2150 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:20,150 INFO L93 Difference]: Finished difference Result 4352 states and 6810 transitions. [2023-03-31 01:41:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:41:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-03-31 01:41:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:20,163 INFO L225 Difference]: With dead ends: 4352 [2023-03-31 01:41:20,164 INFO L226 Difference]: Without dead ends: 3027 [2023-03-31 01:41:20,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:20,168 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 357 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:20,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 548 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2023-03-31 01:41:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 2194. [2023-03-31 01:41:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2190 states have (on average 1.5534246575342465) internal successors, (3402), 2190 states have internal predecessors, (3402), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3405 transitions. [2023-03-31 01:41:20,374 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3405 transitions. Word has length 68 [2023-03-31 01:41:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:20,374 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 3405 transitions. [2023-03-31 01:41:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3405 transitions. [2023-03-31 01:41:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 01:41:20,375 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:20,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:20,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:41:20,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:20,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 257581869, now seen corresponding path program 1 times [2023-03-31 01:41:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:20,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712293959] [2023-03-31 01:41:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:20,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712293959] [2023-03-31 01:41:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712293959] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:20,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:20,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:20,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548119612] [2023-03-31 01:41:20,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:20,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:20,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:20,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:20,612 INFO L87 Difference]: Start difference. First operand 2194 states and 3405 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:21,504 INFO L93 Difference]: Finished difference Result 4270 states and 6649 transitions. [2023-03-31 01:41:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-03-31 01:41:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:21,518 INFO L225 Difference]: With dead ends: 4270 [2023-03-31 01:41:21,518 INFO L226 Difference]: Without dead ends: 3060 [2023-03-31 01:41:21,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:21,523 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 101 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:21,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 406 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2023-03-31 01:41:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3058. [2023-03-31 01:41:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3054 states have (on average 1.5419122462344466) internal successors, (4709), 3054 states have internal predecessors, (4709), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 4712 transitions. [2023-03-31 01:41:21,801 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 4712 transitions. Word has length 68 [2023-03-31 01:41:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:21,802 INFO L495 AbstractCegarLoop]: Abstraction has 3058 states and 4712 transitions. [2023-03-31 01:41:21,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 4712 transitions. [2023-03-31 01:41:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 01:41:21,806 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:21,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:21,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:41:21,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:21,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1995337399, now seen corresponding path program 1 times [2023-03-31 01:41:21,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:21,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805123130] [2023-03-31 01:41:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:21,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:22,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:22,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805123130] [2023-03-31 01:41:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805123130] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:22,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:22,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:22,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528750856] [2023-03-31 01:41:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:22,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:22,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:22,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:22,045 INFO L87 Difference]: Start difference. First operand 3058 states and 4712 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:23,026 INFO L93 Difference]: Finished difference Result 5806 states and 8970 transitions. [2023-03-31 01:41:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-03-31 01:41:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:23,045 INFO L225 Difference]: With dead ends: 5806 [2023-03-31 01:41:23,045 INFO L226 Difference]: Without dead ends: 4137 [2023-03-31 01:41:23,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:23,051 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 106 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:23,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 438 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2023-03-31 01:41:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 4135. [2023-03-31 01:41:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4131 states have (on average 1.5274751876059065) internal successors, (6310), 4131 states have internal predecessors, (6310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 6313 transitions. [2023-03-31 01:41:23,529 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 6313 transitions. Word has length 68 [2023-03-31 01:41:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:23,530 INFO L495 AbstractCegarLoop]: Abstraction has 4135 states and 6313 transitions. [2023-03-31 01:41:23,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 6313 transitions. [2023-03-31 01:41:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-03-31 01:41:23,533 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:23,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:41:23,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:23,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash 738881523, now seen corresponding path program 1 times [2023-03-31 01:41:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:23,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092421008] [2023-03-31 01:41:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:23,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:23,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:23,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092421008] [2023-03-31 01:41:23,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092421008] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:23,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:23,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997780118] [2023-03-31 01:41:23,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:23,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:23,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:24,000 INFO L87 Difference]: Start difference. First operand 4135 states and 6313 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:25,094 INFO L93 Difference]: Finished difference Result 6933 states and 10502 transitions. [2023-03-31 01:41:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-03-31 01:41:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:25,123 INFO L225 Difference]: With dead ends: 6933 [2023-03-31 01:41:25,124 INFO L226 Difference]: Without dead ends: 6931 [2023-03-31 01:41:25,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:25,129 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 226 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:25,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 930 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6931 states. [2023-03-31 01:41:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6931 to 4239. [2023-03-31 01:41:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4235 states have (on average 1.50814639905549) internal successors, (6387), 4235 states have internal predecessors, (6387), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 6390 transitions. [2023-03-31 01:41:25,657 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 6390 transitions. Word has length 76 [2023-03-31 01:41:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:25,657 INFO L495 AbstractCegarLoop]: Abstraction has 4239 states and 6390 transitions. [2023-03-31 01:41:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 6390 transitions. [2023-03-31 01:41:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 01:41:25,659 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:25,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:25,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:41:25,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:25,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 770966644, now seen corresponding path program 1 times [2023-03-31 01:41:25,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:25,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206876500] [2023-03-31 01:41:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:25,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 01:41:26,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206876500] [2023-03-31 01:41:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206876500] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:26,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:26,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:26,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209729283] [2023-03-31 01:41:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:26,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:26,006 INFO L87 Difference]: Start difference. First operand 4239 states and 6390 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:27,570 INFO L93 Difference]: Finished difference Result 12232 states and 18482 transitions. [2023-03-31 01:41:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:27,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 01:41:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:27,619 INFO L225 Difference]: With dead ends: 12232 [2023-03-31 01:41:27,619 INFO L226 Difference]: Without dead ends: 9414 [2023-03-31 01:41:27,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:27,629 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 449 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:27,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 885 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:41:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9414 states. [2023-03-31 01:41:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9414 to 6816. [2023-03-31 01:41:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6816 states, 6812 states have (on average 1.5055783910745744) internal successors, (10256), 6812 states have internal predecessors, (10256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6816 states to 6816 states and 10259 transitions. [2023-03-31 01:41:28,456 INFO L78 Accepts]: Start accepts. Automaton has 6816 states and 10259 transitions. Word has length 97 [2023-03-31 01:41:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:28,456 INFO L495 AbstractCegarLoop]: Abstraction has 6816 states and 10259 transitions. [2023-03-31 01:41:28,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6816 states and 10259 transitions. [2023-03-31 01:41:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 01:41:28,459 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:28,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:41:28,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:28,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1786245122, now seen corresponding path program 1 times [2023-03-31 01:41:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:28,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057909734] [2023-03-31 01:41:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:28,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 01:41:28,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:28,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057909734] [2023-03-31 01:41:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057909734] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:28,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930323790] [2023-03-31 01:41:28,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:28,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:28,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:28,804 INFO L87 Difference]: Start difference. First operand 6816 states and 10259 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:30,398 INFO L93 Difference]: Finished difference Result 13847 states and 20920 transitions. [2023-03-31 01:41:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 01:41:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:30,425 INFO L225 Difference]: With dead ends: 13847 [2023-03-31 01:41:30,426 INFO L226 Difference]: Without dead ends: 11029 [2023-03-31 01:41:30,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:30,435 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 441 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:30,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 958 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:41:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11029 states. [2023-03-31 01:41:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11029 to 10220. [2023-03-31 01:41:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10220 states, 10216 states have (on average 1.5041111981205952) internal successors, (15366), 10216 states have internal predecessors, (15366), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10220 states to 10220 states and 15369 transitions. [2023-03-31 01:41:31,485 INFO L78 Accepts]: Start accepts. Automaton has 10220 states and 15369 transitions. Word has length 97 [2023-03-31 01:41:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:31,485 INFO L495 AbstractCegarLoop]: Abstraction has 10220 states and 15369 transitions. [2023-03-31 01:41:31,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10220 states and 15369 transitions. [2023-03-31 01:41:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 01:41:31,488 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:31,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:41:31,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:31,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash 508344203, now seen corresponding path program 1 times [2023-03-31 01:41:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185783367] [2023-03-31 01:41:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:31,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:41:31,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185783367] [2023-03-31 01:41:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185783367] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:31,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:31,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502410070] [2023-03-31 01:41:31,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:31,829 INFO L87 Difference]: Start difference. First operand 10220 states and 15369 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:33,559 INFO L93 Difference]: Finished difference Result 14318 states and 21647 transitions. [2023-03-31 01:41:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 01:41:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:33,599 INFO L225 Difference]: With dead ends: 14318 [2023-03-31 01:41:33,599 INFO L226 Difference]: Without dead ends: 12546 [2023-03-31 01:41:33,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:33,611 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 446 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:33,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 952 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:41:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2023-03-31 01:41:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 11780. [2023-03-31 01:41:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11780 states, 11776 states have (on average 1.5064538043478262) internal successors, (17740), 11776 states have internal predecessors, (17740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11780 states to 11780 states and 17743 transitions. [2023-03-31 01:41:34,763 INFO L78 Accepts]: Start accepts. Automaton has 11780 states and 17743 transitions. Word has length 97 [2023-03-31 01:41:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 11780 states and 17743 transitions. [2023-03-31 01:41:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11780 states and 17743 transitions. [2023-03-31 01:41:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:41:34,766 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:34,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:34,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:41:34,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:34,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -700562766, now seen corresponding path program 1 times [2023-03-31 01:41:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606238611] [2023-03-31 01:41:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:35,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 01:41:35,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:35,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606238611] [2023-03-31 01:41:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606238611] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:35,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:35,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:35,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948828385] [2023-03-31 01:41:35,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:35,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:35,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:35,242 INFO L87 Difference]: Start difference. First operand 11780 states and 17743 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:38,810 INFO L93 Difference]: Finished difference Result 33600 states and 50589 transitions. [2023-03-31 01:41:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-03-31 01:41:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:38,878 INFO L225 Difference]: With dead ends: 33600 [2023-03-31 01:41:38,878 INFO L226 Difference]: Without dead ends: 24546 [2023-03-31 01:41:38,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:38,909 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 388 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:38,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 517 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24546 states. [2023-03-31 01:41:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24546 to 20736. [2023-03-31 01:41:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20736 states, 20732 states have (on average 1.5023152614316033) internal successors, (31146), 20732 states have internal predecessors, (31146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20736 states to 20736 states and 31149 transitions. [2023-03-31 01:41:41,341 INFO L78 Accepts]: Start accepts. Automaton has 20736 states and 31149 transitions. Word has length 98 [2023-03-31 01:41:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:41,342 INFO L495 AbstractCegarLoop]: Abstraction has 20736 states and 31149 transitions. [2023-03-31 01:41:41,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20736 states and 31149 transitions. [2023-03-31 01:41:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:41:41,344 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:41,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:41,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:41:41,344 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:41,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash -645722082, now seen corresponding path program 1 times [2023-03-31 01:41:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:41,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235918104] [2023-03-31 01:41:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:41,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:41,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:41:41,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:41,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235918104] [2023-03-31 01:41:41,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235918104] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:41,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:41,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:41,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803298459] [2023-03-31 01:41:41,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:41,566 INFO L87 Difference]: Start difference. First operand 20736 states and 31149 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:45,648 INFO L93 Difference]: Finished difference Result 44578 states and 67265 transitions. [2023-03-31 01:41:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-03-31 01:41:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:45,740 INFO L225 Difference]: With dead ends: 44578 [2023-03-31 01:41:45,740 INFO L226 Difference]: Without dead ends: 33271 [2023-03-31 01:41:45,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:45,776 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 91 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:45,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 355 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33271 states. [2023-03-31 01:41:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33271 to 33181. [2023-03-31 01:41:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33181 states, 33177 states have (on average 1.5031497724327094) internal successors, (49870), 33177 states have internal predecessors, (49870), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33181 states to 33181 states and 49873 transitions. [2023-03-31 01:41:49,660 INFO L78 Accepts]: Start accepts. Automaton has 33181 states and 49873 transitions. Word has length 98 [2023-03-31 01:41:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:49,660 INFO L495 AbstractCegarLoop]: Abstraction has 33181 states and 49873 transitions. [2023-03-31 01:41:49,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33181 states and 49873 transitions. [2023-03-31 01:41:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:41:49,662 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:49,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:49,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-31 01:41:49,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:49,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1482809353, now seen corresponding path program 1 times [2023-03-31 01:41:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:49,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544567745] [2023-03-31 01:41:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:49,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:41:49,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:49,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544567745] [2023-03-31 01:41:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544567745] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:49,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:49,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:49,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398644535] [2023-03-31 01:41:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:49,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:49,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:49,929 INFO L87 Difference]: Start difference. First operand 33181 states and 49873 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:55,500 INFO L93 Difference]: Finished difference Result 55385 states and 83609 transitions. [2023-03-31 01:41:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:41:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-03-31 01:41:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:55,631 INFO L225 Difference]: With dead ends: 55385 [2023-03-31 01:41:55,631 INFO L226 Difference]: Without dead ends: 44160 [2023-03-31 01:41:55,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:55,663 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 199 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:55,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 682 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:41:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44160 states. [2023-03-31 01:42:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44160 to 41183. [2023-03-31 01:42:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41183 states, 41179 states have (on average 1.501663469244032) internal successors, (61837), 41179 states have internal predecessors, (61837), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41183 states to 41183 states and 61840 transitions. [2023-03-31 01:42:00,812 INFO L78 Accepts]: Start accepts. Automaton has 41183 states and 61840 transitions. Word has length 98 [2023-03-31 01:42:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:42:00,813 INFO L495 AbstractCegarLoop]: Abstraction has 41183 states and 61840 transitions. [2023-03-31 01:42:00,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 41183 states and 61840 transitions. [2023-03-31 01:42:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:42:00,815 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:42:00,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:42:00,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-03-31 01:42:00,815 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:42:00,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:42:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1712229573, now seen corresponding path program 1 times [2023-03-31 01:42:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:42:00,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721422461] [2023-03-31 01:42:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:42:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:42:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:42:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:42:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:42:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:42:01,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:42:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721422461] [2023-03-31 01:42:01,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721422461] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:42:01,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:42:01,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:42:01,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418990764] [2023-03-31 01:42:01,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:42:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:42:01,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:42:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:42:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:42:01,094 INFO L87 Difference]: Start difference. First operand 41183 states and 61840 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)