/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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:51:39,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:51:39,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:51:39,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:51:39,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:51:39,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:51:39,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:51:39,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:51:39,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:51:39,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:51:39,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:51:39,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:51:39,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:51:39,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:51:39,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:51:39,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:51:39,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:51:39,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:51:39,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:51:39,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:51:39,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:51:39,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:51:39,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:51:39,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:51:39,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:51:39,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:51:39,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:51:39,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:51:39,870 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 [2023-04-02 06:51:39,900 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:51:39,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:51:39,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:51:39,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:51:39,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:51:39,903 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:51:39,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:51:39,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:51:39,904 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:51:39,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:51:39,908 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:51:39,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:51:39,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:51:39,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:51:39,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:51:39,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:51:39,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:51:39,910 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:51:39,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:51:39,910 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:51:39,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:51:39,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:51:39,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:51:39,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:51:39,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:51:39,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:51:39,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:51:39,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:51:39,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:51:39,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:51:39,912 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:51:39,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:51:39,912 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:51:39,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:51:39,912 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:51:39,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:51:40,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:51:40,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:51:40,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:51:40,207 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:51:40,207 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:51:40,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:51:41,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:51:41,622 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:51:41,622 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:51:41,630 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83cf75ec9/0cefd08a216c4989a837d4501822fa2b/FLAG6e9e9e1de [2023-04-02 06:51:41,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83cf75ec9/0cefd08a216c4989a837d4501822fa2b [2023-04-02 06:51:41,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:51:41,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:51:41,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:51:41,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:51:41,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:51:41,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:51:41" (1/1) ... [2023-04-02 06:51:41,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c773391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:41, skipping insertion in model container [2023-04-02 06:51:41,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:51:41" (1/1) ... [2023-04-02 06:51:41,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:51:41,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:51:41,889 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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-02 06:51:41,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:51:41,933 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:51:41,977 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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-04-02 06:51:42,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:51:42,027 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:51:42,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42 WrapperNode [2023-04-02 06:51:42,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:51:42,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:51:42,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:51:42,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:51:42,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:51:42,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:51:42,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:51:42,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:51:42,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (1/1) ... [2023-04-02 06:51:42,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:51:42,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:51:42,158 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) [2023-04-02 06:51:42,182 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 [2023-04-02 06:51:42,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:51:42,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:51:42,202 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:51:42,202 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:51:42,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:51:42,203 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:51:42,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:51:42,203 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:51:42,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:51:42,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:51:42,204 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:51:42,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:51:42,399 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:51:42,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:51:43,086 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:51:43,094 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:51:43,095 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:51:43,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:51:43 BoogieIcfgContainer [2023-04-02 06:51:43,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:51:43,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:51:43,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:51:43,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:51:43,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:51:41" (1/3) ... [2023-04-02 06:51:43,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8ca8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:51:43, skipping insertion in model container [2023-04-02 06:51:43,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:51:42" (2/3) ... [2023-04-02 06:51:43,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8ca8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:51:43, skipping insertion in model container [2023-04-02 06:51:43,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:51:43" (3/3) ... [2023-04-02 06:51:43,106 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:51:43,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:51:43,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:51:43,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:51:43,179 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;@fd3ea76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:51:43,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:51:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 154 states have (on average 1.7402597402597402) internal successors, (268), 161 states have internal predecessors, (268), 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) [2023-04-02 06:51:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:51:43,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:43,194 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] [2023-04-02 06:51:43,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:43,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash -32538977, now seen corresponding path program 1 times [2023-04-02 06:51:43,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781917356] [2023-04-02 06:51:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:43,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781917356] [2023-04-02 06:51:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781917356] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:43,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:43,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:43,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956616718] [2023-04-02 06:51:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:43,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:43,985 INFO L87 Difference]: Start difference. First operand has 166 states, 154 states have (on average 1.7402597402597402) internal successors, (268), 161 states have internal predecessors, (268), 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 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-04-02 06:51:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:44,885 INFO L93 Difference]: Finished difference Result 352 states and 558 transitions. [2023-04-02 06:51:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 66 [2023-04-02 06:51:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:44,896 INFO L225 Difference]: With dead ends: 352 [2023-04-02 06:51:44,896 INFO L226 Difference]: Without dead ends: 228 [2023-04-02 06:51:44,900 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 [2023-04-02 06:51:44,906 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 161 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:44,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 450 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:51:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-02 06:51:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2023-04-02 06:51:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 221 states have (on average 1.51131221719457) internal successors, (334), 221 states have internal predecessors, (334), 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) [2023-04-02 06:51:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 337 transitions. [2023-04-02 06:51:45,004 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 337 transitions. Word has length 66 [2023-04-02 06:51:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:45,005 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 337 transitions. [2023-04-02 06:51:45,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-04-02 06:51:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 337 transitions. [2023-04-02 06:51:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:51:45,008 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:45,008 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:51:45,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:45,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1854086336, now seen corresponding path program 1 times [2023-04-02 06:51:45,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:45,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925579090] [2023-04-02 06:51:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:45,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925579090] [2023-04-02 06:51:45,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925579090] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:45,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:45,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885858735] [2023-04-02 06:51:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:45,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:45,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:45,365 INFO L87 Difference]: Start difference. First operand 225 states and 337 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) [2023-04-02 06:51:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:46,044 INFO L93 Difference]: Finished difference Result 537 states and 825 transitions. [2023-04-02 06:51:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:46,045 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 [2023-04-02 06:51:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:46,050 INFO L225 Difference]: With dead ends: 537 [2023-04-02 06:51:46,050 INFO L226 Difference]: Without dead ends: 373 [2023-04-02 06:51:46,060 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 [2023-04-02 06:51:46,064 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 128 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:46,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 418 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-04-02 06:51:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2023-04-02 06:51:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 365 states have (on average 1.526027397260274) internal successors, (557), 365 states have internal predecessors, (557), 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) [2023-04-02 06:51:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 560 transitions. [2023-04-02 06:51:46,101 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 560 transitions. Word has length 68 [2023-04-02 06:51:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 560 transitions. [2023-04-02 06:51:46,101 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) [2023-04-02 06:51:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 560 transitions. [2023-04-02 06:51:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:51:46,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:46,104 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] [2023-04-02 06:51:46,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:51:46,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:46,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash -314471455, now seen corresponding path program 1 times [2023-04-02 06:51:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666471093] [2023-04-02 06:51:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:46,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:46,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:46,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666471093] [2023-04-02 06:51:46,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666471093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:46,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:46,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787355431] [2023-04-02 06:51:46,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:46,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:46,445 INFO L87 Difference]: Start difference. First operand 369 states and 560 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-04-02 06:51:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:47,083 INFO L93 Difference]: Finished difference Result 953 states and 1466 transitions. [2023-04-02 06:51:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 70 [2023-04-02 06:51:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:47,087 INFO L225 Difference]: With dead ends: 953 [2023-04-02 06:51:47,087 INFO L226 Difference]: Without dead ends: 645 [2023-04-02 06:51:47,088 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 [2023-04-02 06:51:47,089 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 122 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:47,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 419 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2023-04-02 06:51:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 639. [2023-04-02 06:51:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 635 states have (on average 1.5259842519685038) internal successors, (969), 635 states have internal predecessors, (969), 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) [2023-04-02 06:51:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 972 transitions. [2023-04-02 06:51:47,147 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 972 transitions. Word has length 70 [2023-04-02 06:51:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:47,149 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 972 transitions. [2023-04-02 06:51:47,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-04-02 06:51:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 972 transitions. [2023-04-02 06:51:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:51:47,157 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:47,158 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] [2023-04-02 06:51:47,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:51:47,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:47,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1947624002, now seen corresponding path program 1 times [2023-04-02 06:51:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:47,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516339584] [2023-04-02 06:51:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:47,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:47,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516339584] [2023-04-02 06:51:47,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516339584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:47,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:47,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:51:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612903534] [2023-04-02 06:51:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:47,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:51:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:51:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:47,451 INFO L87 Difference]: Start difference. First operand 639 states and 972 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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) [2023-04-02 06:51:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:48,274 INFO L93 Difference]: Finished difference Result 3265 states and 5062 transitions. [2023-04-02 06:51:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:51:48,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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 72 [2023-04-02 06:51:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:48,286 INFO L225 Difference]: With dead ends: 3265 [2023-04-02 06:51:48,287 INFO L226 Difference]: Without dead ends: 2677 [2023-04-02 06:51:48,290 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 [2023-04-02 06:51:48,290 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 975 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:48,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1388 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2023-04-02 06:51:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 1175. [2023-04-02 06:51:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1171 states have (on average 1.5448334756618276) internal successors, (1809), 1171 states have internal predecessors, (1809), 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) [2023-04-02 06:51:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1812 transitions. [2023-04-02 06:51:48,440 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1812 transitions. Word has length 72 [2023-04-02 06:51:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:48,441 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1812 transitions. [2023-04-02 06:51:48,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 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) [2023-04-02 06:51:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1812 transitions. [2023-04-02 06:51:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:51:48,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:48,442 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] [2023-04-02 06:51:48,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:51:48,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:48,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash 185191483, now seen corresponding path program 1 times [2023-04-02 06:51:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235537882] [2023-04-02 06:51:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235537882] [2023-04-02 06:51:48,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235537882] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:48,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:48,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:51:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11915688] [2023-04-02 06:51:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:51:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:51:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:51:48,723 INFO L87 Difference]: Start difference. First operand 1175 states and 1812 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-02 06:51:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:49,491 INFO L93 Difference]: Finished difference Result 4283 states and 6651 transitions. [2023-04-02 06:51:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:51:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-02 06:51:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:49,505 INFO L225 Difference]: With dead ends: 4283 [2023-04-02 06:51:49,505 INFO L226 Difference]: Without dead ends: 3169 [2023-04-02 06:51:49,508 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 [2023-04-02 06:51:49,509 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 434 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:49,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 684 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2023-04-02 06:51:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2160. [2023-04-02 06:51:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2156 states have (on average 1.544526901669759) internal successors, (3330), 2156 states have internal predecessors, (3330), 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) [2023-04-02 06:51:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3333 transitions. [2023-04-02 06:51:49,740 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3333 transitions. Word has length 73 [2023-04-02 06:51:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:49,741 INFO L495 AbstractCegarLoop]: Abstraction has 2160 states and 3333 transitions. [2023-04-02 06:51:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-02 06:51:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3333 transitions. [2023-04-02 06:51:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:51:49,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:49,743 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] [2023-04-02 06:51:49,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:51:49,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:49,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2073097267, now seen corresponding path program 1 times [2023-04-02 06:51:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:49,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230315643] [2023-04-02 06:51:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:49,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:49,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230315643] [2023-04-02 06:51:49,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230315643] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:49,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:49,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:49,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183864119] [2023-04-02 06:51:49,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:49,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:49,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:49,978 INFO L87 Difference]: Start difference. First operand 2160 states and 3333 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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) [2023-04-02 06:51:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:50,846 INFO L93 Difference]: Finished difference Result 4300 states and 6644 transitions. [2023-04-02 06:51:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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 [2023-04-02 06:51:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:50,858 INFO L225 Difference]: With dead ends: 4300 [2023-04-02 06:51:50,858 INFO L226 Difference]: Without dead ends: 3110 [2023-04-02 06:51:50,861 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 [2023-04-02 06:51:50,862 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 121 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:50,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 445 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2023-04-02 06:51:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 3108. [2023-04-02 06:51:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3104 states have (on average 1.53125) internal successors, (4753), 3104 states have internal predecessors, (4753), 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) [2023-04-02 06:51:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4756 transitions. [2023-04-02 06:51:51,169 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4756 transitions. Word has length 76 [2023-04-02 06:51:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:51,170 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4756 transitions. [2023-04-02 06:51:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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) [2023-04-02 06:51:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4756 transitions. [2023-04-02 06:51:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:51:51,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:51,172 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] [2023-04-02 06:51:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:51:51,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:51,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -137335905, now seen corresponding path program 1 times [2023-04-02 06:51:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421722820] [2023-04-02 06:51:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:51,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:51,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421722820] [2023-04-02 06:51:51,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421722820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:51,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:51,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643981533] [2023-04-02 06:51:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:51,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:51,413 INFO L87 Difference]: Start difference. First operand 3108 states and 4756 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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) [2023-04-02 06:51:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:52,435 INFO L93 Difference]: Finished difference Result 5758 states and 8828 transitions. [2023-04-02 06:51:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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 [2023-04-02 06:51:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:52,454 INFO L225 Difference]: With dead ends: 5758 [2023-04-02 06:51:52,454 INFO L226 Difference]: Without dead ends: 4091 [2023-04-02 06:51:52,461 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 [2023-04-02 06:51:52,464 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 127 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:52,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 485 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:51:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2023-04-02 06:51:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 4089. [2023-04-02 06:51:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 4085 states have (on average 1.5182374541003671) internal successors, (6202), 4085 states have internal predecessors, (6202), 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) [2023-04-02 06:51:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 6205 transitions. [2023-04-02 06:51:52,902 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 6205 transitions. Word has length 76 [2023-04-02 06:51:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:52,903 INFO L495 AbstractCegarLoop]: Abstraction has 4089 states and 6205 transitions. [2023-04-02 06:51:52,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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) [2023-04-02 06:51:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 6205 transitions. [2023-04-02 06:51:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:51:52,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:52,904 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] [2023-04-02 06:51:52,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:51:52,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:52,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1585910769, now seen corresponding path program 1 times [2023-04-02 06:51:52,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:52,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222646603] [2023-04-02 06:51:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:52,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222646603] [2023-04-02 06:51:53,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222646603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:53,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104851468] [2023-04-02 06:51:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:53,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:53,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:53,158 INFO L87 Difference]: Start difference. First operand 4089 states and 6205 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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) [2023-04-02 06:51:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:54,370 INFO L93 Difference]: Finished difference Result 9590 states and 14554 transitions. [2023-04-02 06:51:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:51:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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 [2023-04-02 06:51:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:54,395 INFO L225 Difference]: With dead ends: 9590 [2023-04-02 06:51:54,396 INFO L226 Difference]: Without dead ends: 5596 [2023-04-02 06:51:54,405 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 [2023-04-02 06:51:54,407 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 133 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:54,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 520 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:51:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2023-04-02 06:51:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5594. [2023-04-02 06:51:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5594 states, 5590 states have (on average 1.509660107334526) internal successors, (8439), 5590 states have internal predecessors, (8439), 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) [2023-04-02 06:51:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5594 states to 5594 states and 8442 transitions. [2023-04-02 06:51:54,950 INFO L78 Accepts]: Start accepts. Automaton has 5594 states and 8442 transitions. Word has length 76 [2023-04-02 06:51:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:54,951 INFO L495 AbstractCegarLoop]: Abstraction has 5594 states and 8442 transitions. [2023-04-02 06:51:54,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 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) [2023-04-02 06:51:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5594 states and 8442 transitions. [2023-04-02 06:51:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:51:54,952 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:54,952 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, 1, 1, 1, 1, 1] [2023-04-02 06:51:54,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:51:54,952 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:54,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1794680655, now seen corresponding path program 1 times [2023-04-02 06:51:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:54,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487578386] [2023-04-02 06:51:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:55,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487578386] [2023-04-02 06:51:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487578386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:55,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:55,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:51:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966884186] [2023-04-02 06:51:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:51:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:51:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:55,409 INFO L87 Difference]: Start difference. First operand 5594 states and 8442 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 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) [2023-04-02 06:51:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:56,802 INFO L93 Difference]: Finished difference Result 9883 states and 14851 transitions. [2023-04-02 06:51:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:51:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 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 81 [2023-04-02 06:51:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:56,848 INFO L225 Difference]: With dead ends: 9883 [2023-04-02 06:51:56,849 INFO L226 Difference]: Without dead ends: 9881 [2023-04-02 06:51:56,858 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 [2023-04-02 06:51:56,858 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 278 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:56,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1082 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:51:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2023-04-02 06:51:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 5716. [2023-04-02 06:51:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5712 states have (on average 1.494047619047619) internal successors, (8534), 5712 states have internal predecessors, (8534), 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) [2023-04-02 06:51:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 8537 transitions. [2023-04-02 06:51:57,481 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 8537 transitions. Word has length 81 [2023-04-02 06:51:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:57,481 INFO L495 AbstractCegarLoop]: Abstraction has 5716 states and 8537 transitions. [2023-04-02 06:51:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 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) [2023-04-02 06:51:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 8537 transitions. [2023-04-02 06:51:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:57,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:57,484 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:57,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:51:57,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:57,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash -646569457, now seen corresponding path program 1 times [2023-04-02 06:51:57,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:57,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646841278] [2023-04-02 06:51:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:57,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:51:57,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646841278] [2023-04-02 06:51:57,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646841278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:57,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:57,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:51:57,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914764164] [2023-04-02 06:51:57,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:57,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:51:57,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:51:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:51:57,812 INFO L87 Difference]: Start difference. First operand 5716 states and 8537 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-04-02 06:51:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:59,767 INFO L93 Difference]: Finished difference Result 17298 states and 25871 transitions. [2023-04-02 06:51:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:51:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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 107 [2023-04-02 06:51:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:59,804 INFO L225 Difference]: With dead ends: 17298 [2023-04-02 06:51:59,804 INFO L226 Difference]: Without dead ends: 13510 [2023-04-02 06:51:59,816 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 [2023-04-02 06:51:59,817 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 556 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:59,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 982 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:51:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13510 states. [2023-04-02 06:52:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13510 to 9382. [2023-04-02 06:52:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9382 states, 9378 states have (on average 1.4897632757517594) internal successors, (13971), 9378 states have internal predecessors, (13971), 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) [2023-04-02 06:52:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9382 states to 9382 states and 13974 transitions. [2023-04-02 06:52:00,854 INFO L78 Accepts]: Start accepts. Automaton has 9382 states and 13974 transitions. Word has length 107 [2023-04-02 06:52:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:00,854 INFO L495 AbstractCegarLoop]: Abstraction has 9382 states and 13974 transitions. [2023-04-02 06:52:00,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-04-02 06:52:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 9382 states and 13974 transitions. [2023-04-02 06:52:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:52:00,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:00,857 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:00,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:52:00,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:00,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1289191905, now seen corresponding path program 1 times [2023-04-02 06:52:00,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:00,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324212750] [2023-04-02 06:52:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:00,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:01,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:52:01,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:01,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324212750] [2023-04-02 06:52:01,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324212750] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:01,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:01,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:01,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496815640] [2023-04-02 06:52:01,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:01,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:01,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:01,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:01,239 INFO L87 Difference]: Start difference. First operand 9382 states and 13974 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 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) [2023-04-02 06:52:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:03,455 INFO L93 Difference]: Finished difference Result 19450 states and 29072 transitions. [2023-04-02 06:52:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:52:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 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 107 [2023-04-02 06:52:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:03,496 INFO L225 Difference]: With dead ends: 19450 [2023-04-02 06:52:03,496 INFO L226 Difference]: Without dead ends: 15662 [2023-04-02 06:52:03,510 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 [2023-04-02 06:52:03,511 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 552 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:03,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1054 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:52:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15662 states. [2023-04-02 06:52:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15662 to 14136. [2023-04-02 06:52:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14136 states, 14132 states have (on average 1.4872629493348428) internal successors, (21018), 14132 states have internal predecessors, (21018), 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) [2023-04-02 06:52:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14136 states to 14136 states and 21021 transitions. [2023-04-02 06:52:04,888 INFO L78 Accepts]: Start accepts. Automaton has 14136 states and 21021 transitions. Word has length 107 [2023-04-02 06:52:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:04,888 INFO L495 AbstractCegarLoop]: Abstraction has 14136 states and 21021 transitions. [2023-04-02 06:52:04,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 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) [2023-04-02 06:52:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 14136 states and 21021 transitions. [2023-04-02 06:52:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:52:04,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:04,891 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:52:04,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:04,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1282528717, now seen corresponding path program 1 times [2023-04-02 06:52:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311340668] [2023-04-02 06:52:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:05,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:52:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311340668] [2023-04-02 06:52:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311340668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:05,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:05,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:05,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569694270] [2023-04-02 06:52:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:05,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:05,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:05,197 INFO L87 Difference]: Start difference. First operand 14136 states and 21021 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 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) [2023-04-02 06:52:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:07,533 INFO L93 Difference]: Finished difference Result 20918 states and 31252 transitions. [2023-04-02 06:52:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:52:07,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 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 107 [2023-04-02 06:52:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:07,579 INFO L225 Difference]: With dead ends: 20918 [2023-04-02 06:52:07,579 INFO L226 Difference]: Without dead ends: 17982 [2023-04-02 06:52:07,596 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 [2023-04-02 06:52:07,597 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 549 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:07,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1016 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:52:07,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17982 states. [2023-04-02 06:52:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17982 to 16720. [2023-04-02 06:52:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16720 states, 16716 states have (on average 1.4890524048815506) internal successors, (24891), 16716 states have internal predecessors, (24891), 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) [2023-04-02 06:52:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16720 states to 16720 states and 24894 transitions. [2023-04-02 06:52:09,266 INFO L78 Accepts]: Start accepts. Automaton has 16720 states and 24894 transitions. Word has length 107 [2023-04-02 06:52:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:09,267 INFO L495 AbstractCegarLoop]: Abstraction has 16720 states and 24894 transitions. [2023-04-02 06:52:09,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 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) [2023-04-02 06:52:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 16720 states and 24894 transitions. [2023-04-02 06:52:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:52:09,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:09,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:52:09,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:09,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:09,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1761236715, now seen corresponding path program 1 times [2023-04-02 06:52:09,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:09,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753274846] [2023-04-02 06:52:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:52:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753274846] [2023-04-02 06:52:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753274846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:09,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:09,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111731173] [2023-04-02 06:52:09,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:09,522 INFO L87 Difference]: Start difference. First operand 16720 states and 24894 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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) [2023-04-02 06:52:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:12,295 INFO L93 Difference]: Finished difference Result 38898 states and 58018 transitions. [2023-04-02 06:52:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 108 [2023-04-02 06:52:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:12,362 INFO L225 Difference]: With dead ends: 38898 [2023-04-02 06:52:12,362 INFO L226 Difference]: Without dead ends: 28026 [2023-04-02 06:52:12,391 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 [2023-04-02 06:52:12,392 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 112 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:12,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 410 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:52:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28026 states. [2023-04-02 06:52:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28026 to 27974. [2023-04-02 06:52:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27974 states, 27970 states have (on average 1.4873078298176619) internal successors, (41600), 27970 states have internal predecessors, (41600), 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) [2023-04-02 06:52:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27974 states to 27974 states and 41603 transitions. [2023-04-02 06:52:14,880 INFO L78 Accepts]: Start accepts. Automaton has 27974 states and 41603 transitions. Word has length 108 [2023-04-02 06:52:14,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:14,880 INFO L495 AbstractCegarLoop]: Abstraction has 27974 states and 41603 transitions. [2023-04-02 06:52:14,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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) [2023-04-02 06:52:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27974 states and 41603 transitions. [2023-04-02 06:52:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:52:14,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:14,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:14,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:52:14,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:14,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1165294998, now seen corresponding path program 1 times [2023-04-02 06:52:14,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:14,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827836300] [2023-04-02 06:52:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:14,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:15,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:52:15,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827836300] [2023-04-02 06:52:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827836300] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:15,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:15,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:52:15,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346752194] [2023-04-02 06:52:15,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:15,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:52:15,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:52:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:15,188 INFO L87 Difference]: Start difference. First operand 27974 states and 41603 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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) [2023-04-02 06:52:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:19,051 INFO L93 Difference]: Finished difference Result 49692 states and 74213 transitions. [2023-04-02 06:52:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:52:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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 108 [2023-04-02 06:52:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:19,132 INFO L225 Difference]: With dead ends: 49692 [2023-04-02 06:52:19,132 INFO L226 Difference]: Without dead ends: 38671 [2023-04-02 06:52:19,164 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 [2023-04-02 06:52:19,165 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 244 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:19,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 794 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38671 states. [2023-04-02 06:52:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38671 to 35358. [2023-04-02 06:52:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35358 states, 35354 states have (on average 1.484443061605476) internal successors, (52481), 35354 states have internal predecessors, (52481), 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) [2023-04-02 06:52:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35358 states to 35358 states and 52484 transitions. [2023-04-02 06:52:22,721 INFO L78 Accepts]: Start accepts. Automaton has 35358 states and 52484 transitions. Word has length 108 [2023-04-02 06:52:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:22,722 INFO L495 AbstractCegarLoop]: Abstraction has 35358 states and 52484 transitions. [2023-04-02 06:52:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 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) [2023-04-02 06:52:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 35358 states and 52484 transitions. [2023-04-02 06:52:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:52:22,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:22,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:22,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:52:22,725 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:22,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash -73846543, now seen corresponding path program 1 times [2023-04-02 06:52:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:22,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003071011] [2023-04-02 06:52:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:52:22,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:22,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003071011] [2023-04-02 06:52:22,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003071011] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:22,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:22,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:22,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930898854] [2023-04-02 06:52:22,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:22,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:22,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:22,978 INFO L87 Difference]: Start difference. First operand 35358 states and 52484 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-04-02 06:52:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:29,969 INFO L93 Difference]: Finished difference Result 103638 states and 153482 transitions. [2023-04-02 06:52:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-02 06:52:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:30,097 INFO L225 Difference]: With dead ends: 103638 [2023-04-02 06:52:30,097 INFO L226 Difference]: Without dead ends: 68361 [2023-04-02 06:52:30,158 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 [2023-04-02 06:52:30,159 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 154 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:30,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 511 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:52:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68361 states. [2023-04-02 06:52:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68361 to 68359. [2023-04-02 06:52:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68359 states, 68355 states have (on average 1.4695047911637773) internal successors, (100448), 68355 states have internal predecessors, (100448), 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) [2023-04-02 06:52:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68359 states to 68359 states and 100451 transitions. [2023-04-02 06:52:36,982 INFO L78 Accepts]: Start accepts. Automaton has 68359 states and 100451 transitions. Word has length 109 [2023-04-02 06:52:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:36,982 INFO L495 AbstractCegarLoop]: Abstraction has 68359 states and 100451 transitions. [2023-04-02 06:52:36,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-04-02 06:52:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 68359 states and 100451 transitions. [2023-04-02 06:52:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:52:36,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:36,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:36,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:52:36,988 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:36,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1455225659, now seen corresponding path program 1 times [2023-04-02 06:52:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396521526] [2023-04-02 06:52:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:37,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:52:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:37,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396521526] [2023-04-02 06:52:37,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396521526] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:37,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:37,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:37,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504107668] [2023-04-02 06:52:37,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:37,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:37,258 INFO L87 Difference]: Start difference. First operand 68359 states and 100451 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-04-02 06:52:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:51,881 INFO L93 Difference]: Finished difference Result 200250 states and 293490 transitions. [2023-04-02 06:52:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-02 06:52:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:52,176 INFO L225 Difference]: With dead ends: 200250 [2023-04-02 06:52:52,176 INFO L226 Difference]: Without dead ends: 132051 [2023-04-02 06:52:52,270 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 [2023-04-02 06:52:52,271 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 173 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:52,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 549 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132051 states. [2023-04-02 06:53:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132051 to 132049. [2023-04-02 06:53:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132049 states, 132045 states have (on average 1.4535802188647808) internal successors, (191938), 132045 states have internal predecessors, (191938), 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) [2023-04-02 06:53:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132049 states to 132049 states and 191941 transitions. [2023-04-02 06:53:06,727 INFO L78 Accepts]: Start accepts. Automaton has 132049 states and 191941 transitions. Word has length 109 [2023-04-02 06:53:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:06,728 INFO L495 AbstractCegarLoop]: Abstraction has 132049 states and 191941 transitions. [2023-04-02 06:53:06,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-04-02 06:53:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 132049 states and 191941 transitions. [2023-04-02 06:53:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 06:53:06,735 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:06,736 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:53:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:53:06,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:06,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2076546674, now seen corresponding path program 1 times [2023-04-02 06:53:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453424430] [2023-04-02 06:53:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 06:53:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:06,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453424430] [2023-04-02 06:53:06,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453424430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:06,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:06,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:06,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846871139] [2023-04-02 06:53:06,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:06,977 INFO L87 Difference]: Start difference. First operand 132049 states and 191941 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 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)