/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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 07:00:02,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 07:00:02,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 07:00:02,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 07:00:02,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 07:00:02,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 07:00:02,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 07:00:02,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 07:00:02,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 07:00:02,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 07:00:02,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 07:00:02,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 07:00:02,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 07:00:02,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 07:00:02,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 07:00:02,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 07:00:02,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 07:00:02,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 07:00:02,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 07:00:02,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 07:00:02,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 07:00:02,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 07:00:02,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 07:00:02,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 07:00:02,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 07:00:02,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 07:00:02,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 07:00:02,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 07:00:03,003 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 07:00:03,041 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 07:00:03,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 07:00:03,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 07:00:03,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 07:00:03,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 07:00:03,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 07:00:03,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 07:00:03,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 07:00:03,043 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 07:00:03,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 07:00:03,043 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 07:00:03,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 07:00:03,044 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 07:00:03,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 07:00:03,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 07:00:03,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 07:00:03,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 07:00:03,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 07:00:03,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 07:00:03,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 07:00:03,054 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 07:00:03,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 07:00:03,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 07:00:03,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 07:00:03,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 07:00:03,342 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 07:00:03,343 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 07:00:03,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 07:00:04,586 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 07:00:04,858 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 07:00:04,859 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 07:00:04,873 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a932b717a/3064a35fae264b838a4ce276c51b9574/FLAG0d33f5541 [2023-04-02 07:00:04,889 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a932b717a/3064a35fae264b838a4ce276c51b9574 [2023-04-02 07:00:04,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 07:00:04,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 07:00:04,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 07:00:04,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 07:00:04,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 07:00:04,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:00:04" (1/1) ... [2023-04-02 07:00:04,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af38808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:04, skipping insertion in model container [2023-04-02 07:00:04,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:00:04" (1/1) ... [2023-04-02 07:00:04,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 07:00:04,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 07:00:05,210 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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2023-04-02 07:00:05,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 07:00:05,337 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 07:00:05,400 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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2023-04-02 07:00:05,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 07:00:05,470 INFO L208 MainTranslator]: Completed translation [2023-04-02 07:00:05,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05 WrapperNode [2023-04-02 07:00:05,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 07:00:05,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 07:00:05,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 07:00:05,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 07:00:05,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,601 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 07:00:05,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 07:00:05,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 07:00:05,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 07:00:05,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (1/1) ... [2023-04-02 07:00:05,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 07:00:05,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 07:00:05,642 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 07:00:05,663 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 07:00:05,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 07:00:05,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 07:00:05,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 07:00:05,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 07:00:05,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 07:00:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 07:00:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 07:00:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 07:00:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 07:00:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 07:00:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 07:00:05,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 07:00:05,687 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 07:00:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 07:00:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 07:00:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 07:00:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 07:00:05,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 07:00:05,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 07:00:05,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 07:00:05,907 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 07:00:05,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 07:00:06,986 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 07:00:06,999 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 07:00:06,999 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 07:00:07,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:00:07 BoogieIcfgContainer [2023-04-02 07:00:07,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 07:00:07,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 07:00:07,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 07:00:07,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 07:00:07,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:00:04" (1/3) ... [2023-04-02 07:00:07,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e71102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:00:07, skipping insertion in model container [2023-04-02 07:00:07,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:00:05" (2/3) ... [2023-04-02 07:00:07,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e71102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:00:07, skipping insertion in model container [2023-04-02 07:00:07,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:00:07" (3/3) ... [2023-04-02 07:00:07,012 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 07:00:07,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 07:00:07,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 07:00:07,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 07:00:07,099 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;@4aafaefe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 07:00:07,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 07:00:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 363 states, 350 states have (on average 1.7857142857142858) internal successors, (625), 358 states have internal predecessors, (625), 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 07:00:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 07:00:07,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:07,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:07,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:07,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1187077381, now seen corresponding path program 1 times [2023-04-02 07:00:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:07,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364561943] [2023-04-02 07:00:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:07,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:08,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:08,276 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 07:00:08,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:08,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364561943] [2023-04-02 07:00:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364561943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:08,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:08,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:08,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102202423] [2023-04-02 07:00:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:08,339 INFO L87 Difference]: Start difference. First operand has 363 states, 350 states have (on average 1.7857142857142858) internal successors, (625), 358 states have internal predecessors, (625), 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 29.75) internal successors, (119), 3 states have internal predecessors, (119), 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 07:00:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:10,440 INFO L93 Difference]: Finished difference Result 681 states and 1137 transitions. [2023-04-02 07:00:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 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 122 [2023-04-02 07:00:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:10,460 INFO L225 Difference]: With dead ends: 681 [2023-04-02 07:00:10,461 INFO L226 Difference]: Without dead ends: 494 [2023-04-02 07:00:10,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:10,467 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 272 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:10,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1160 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 07:00:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-04-02 07:00:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 491. [2023-04-02 07:00:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 487 states have (on average 1.626283367556468) internal successors, (792), 487 states have internal predecessors, (792), 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 07:00:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 795 transitions. [2023-04-02 07:00:10,570 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 795 transitions. Word has length 122 [2023-04-02 07:00:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:10,571 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 795 transitions. [2023-04-02 07:00:10,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 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 07:00:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 795 transitions. [2023-04-02 07:00:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 07:00:10,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:10,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:10,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 07:00:10,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:10,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1248090136, now seen corresponding path program 1 times [2023-04-02 07:00:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:10,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816533770] [2023-04-02 07:00:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:11,168 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 07:00:11,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:11,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816533770] [2023-04-02 07:00:11,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816533770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:11,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:11,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124703740] [2023-04-02 07:00:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:11,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:11,172 INFO L87 Difference]: Start difference. First operand 491 states and 795 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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 07:00:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:12,786 INFO L93 Difference]: Finished difference Result 1059 states and 1715 transitions. [2023-04-02 07:00:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-02 07:00:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:12,791 INFO L225 Difference]: With dead ends: 1059 [2023-04-02 07:00:12,791 INFO L226 Difference]: Without dead ends: 765 [2023-04-02 07:00:12,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:12,795 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 225 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:12,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1086 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 07:00:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-04-02 07:00:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 761. [2023-04-02 07:00:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 757 states have (on average 1.6208718626155878) internal successors, (1227), 757 states have internal predecessors, (1227), 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 07:00:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1230 transitions. [2023-04-02 07:00:12,840 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1230 transitions. Word has length 125 [2023-04-02 07:00:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:12,841 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 1230 transitions. [2023-04-02 07:00:12,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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 07:00:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1230 transitions. [2023-04-02 07:00:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-02 07:00:12,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:12,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:12,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 07:00:12,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:12,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1310081510, now seen corresponding path program 1 times [2023-04-02 07:00:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464572289] [2023-04-02 07:00:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:13,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:13,360 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 07:00:13,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:13,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464572289] [2023-04-02 07:00:13,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464572289] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:13,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:13,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:13,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024119482] [2023-04-02 07:00:13,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:13,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:13,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:13,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:13,363 INFO L87 Difference]: Start difference. First operand 761 states and 1230 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 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 07:00:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:14,951 INFO L93 Difference]: Finished difference Result 1849 states and 2984 transitions. [2023-04-02 07:00:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:14,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 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 128 [2023-04-02 07:00:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:14,960 INFO L225 Difference]: With dead ends: 1849 [2023-04-02 07:00:14,960 INFO L226 Difference]: Without dead ends: 1285 [2023-04-02 07:00:14,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:14,968 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 218 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:14,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1087 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 07:00:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2023-04-02 07:00:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1279. [2023-04-02 07:00:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1275 states have (on average 1.611764705882353) internal successors, (2055), 1275 states have internal predecessors, (2055), 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 07:00:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2058 transitions. [2023-04-02 07:00:15,038 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2058 transitions. Word has length 128 [2023-04-02 07:00:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:15,040 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 2058 transitions. [2023-04-02 07:00:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 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 07:00:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2058 transitions. [2023-04-02 07:00:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-02 07:00:15,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:15,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:15,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 07:00:15,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:15,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1995112429, now seen corresponding path program 1 times [2023-04-02 07:00:15,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:15,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687474934] [2023-04-02 07:00:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:15,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:15,549 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 07:00:15,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:15,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687474934] [2023-04-02 07:00:15,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687474934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:15,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:15,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:15,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148766413] [2023-04-02 07:00:15,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:15,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:15,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:15,552 INFO L87 Difference]: Start difference. First operand 1279 states and 2058 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 3 states have internal predecessors, (128), 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 07:00:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:17,171 INFO L93 Difference]: Finished difference Result 3363 states and 5396 transitions. [2023-04-02 07:00:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 3 states have internal predecessors, (128), 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 131 [2023-04-02 07:00:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:17,182 INFO L225 Difference]: With dead ends: 3363 [2023-04-02 07:00:17,182 INFO L226 Difference]: Without dead ends: 2281 [2023-04-02 07:00:17,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:17,185 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 210 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:17,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1085 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 07:00:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2023-04-02 07:00:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 2271. [2023-04-02 07:00:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2267 states have (on average 1.596382884869872) internal successors, (3619), 2267 states have internal predecessors, (3619), 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 07:00:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 3622 transitions. [2023-04-02 07:00:17,309 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 3622 transitions. Word has length 131 [2023-04-02 07:00:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:17,310 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 3622 transitions. [2023-04-02 07:00:17,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 3 states have internal predecessors, (128), 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 07:00:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 3622 transitions. [2023-04-02 07:00:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 07:00:17,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:17,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:17,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 07:00:17,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:17,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1751214597, now seen corresponding path program 1 times [2023-04-02 07:00:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923724336] [2023-04-02 07:00:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:17,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:17,920 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 07:00:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923724336] [2023-04-02 07:00:17,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923724336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:17,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:17,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 07:00:17,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698150872] [2023-04-02 07:00:17,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:17,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 07:00:17,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 07:00:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:00:17,934 INFO L87 Difference]: Start difference. First operand 2271 states and 3622 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 6 states have internal predecessors, (131), 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 07:00:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:20,300 INFO L93 Difference]: Finished difference Result 11879 states and 19074 transitions. [2023-04-02 07:00:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 07:00:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 6 states have internal predecessors, (131), 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 134 [2023-04-02 07:00:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:20,345 INFO L225 Difference]: With dead ends: 11879 [2023-04-02 07:00:20,345 INFO L226 Difference]: Without dead ends: 9781 [2023-04-02 07:00:20,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-04-02 07:00:20,358 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 2173 mSDsluCounter, 4470 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2173 SdHoareTripleChecker+Valid, 5044 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:20,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2173 Valid, 5044 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 07:00:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2023-04-02 07:00:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 4157. [2023-04-02 07:00:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 4153 states have (on average 1.60317842523477) internal successors, (6658), 4153 states have internal predecessors, (6658), 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 07:00:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 6661 transitions. [2023-04-02 07:00:20,764 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 6661 transitions. Word has length 134 [2023-04-02 07:00:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:20,765 INFO L495 AbstractCegarLoop]: Abstraction has 4157 states and 6661 transitions. [2023-04-02 07:00:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 6 states have internal predecessors, (131), 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 07:00:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 6661 transitions. [2023-04-02 07:00:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-02 07:00:20,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:20,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 07:00:20,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:20,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1480754089, now seen corresponding path program 1 times [2023-04-02 07:00:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593122974] [2023-04-02 07:00:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:21,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 07:00:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:21,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593122974] [2023-04-02 07:00:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593122974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:21,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:21,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 07:00:21,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110735244] [2023-04-02 07:00:21,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:21,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 07:00:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 07:00:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:21,267 INFO L87 Difference]: Start difference. First operand 4157 states and 6661 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 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 07:00:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:23,364 INFO L93 Difference]: Finished difference Result 12189 states and 19579 transitions. [2023-04-02 07:00:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 07:00:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 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 135 [2023-04-02 07:00:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:23,397 INFO L225 Difference]: With dead ends: 12189 [2023-04-02 07:00:23,397 INFO L226 Difference]: Without dead ends: 8229 [2023-04-02 07:00:23,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:00:23,407 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 733 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:23,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1726 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 07:00:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2023-04-02 07:00:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 6169. [2023-04-02 07:00:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6165 states have (on average 1.6021086780210867) internal successors, (9877), 6165 states have internal predecessors, (9877), 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 07:00:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 9880 transitions. [2023-04-02 07:00:23,961 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 9880 transitions. Word has length 135 [2023-04-02 07:00:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:23,962 INFO L495 AbstractCegarLoop]: Abstraction has 6169 states and 9880 transitions. [2023-04-02 07:00:23,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 4 states have internal predecessors, (132), 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 07:00:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 9880 transitions. [2023-04-02 07:00:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 07:00:23,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:23,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:23,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 07:00:23,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:23,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1331911046, now seen corresponding path program 1 times [2023-04-02 07:00:23,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:23,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025464796] [2023-04-02 07:00:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:23,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:24,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:24,380 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 07:00:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025464796] [2023-04-02 07:00:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025464796] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036722022] [2023-04-02 07:00:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:24,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:24,382 INFO L87 Difference]: Start difference. First operand 6169 states and 9880 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 07:00:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:26,510 INFO L93 Difference]: Finished difference Result 13541 states and 21668 transitions. [2023-04-02 07:00:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 138 [2023-04-02 07:00:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:26,535 INFO L225 Difference]: With dead ends: 13541 [2023-04-02 07:00:26,536 INFO L226 Difference]: Without dead ends: 9367 [2023-04-02 07:00:26,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:26,544 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 231 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:26,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1276 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 07:00:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9367 states. [2023-04-02 07:00:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9367 to 9365. [2023-04-02 07:00:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9365 states, 9361 states have (on average 1.5935263326567675) internal successors, (14917), 9361 states have internal predecessors, (14917), 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 07:00:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9365 states to 9365 states and 14920 transitions. [2023-04-02 07:00:27,472 INFO L78 Accepts]: Start accepts. Automaton has 9365 states and 14920 transitions. Word has length 138 [2023-04-02 07:00:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:27,472 INFO L495 AbstractCegarLoop]: Abstraction has 9365 states and 14920 transitions. [2023-04-02 07:00:27,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 07:00:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9365 states and 14920 transitions. [2023-04-02 07:00:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 07:00:27,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:27,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 07:00:27,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:27,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash -105193326, now seen corresponding path program 1 times [2023-04-02 07:00:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:27,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440816213] [2023-04-02 07:00:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:27,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:27,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:27,930 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 07:00:27,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:27,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440816213] [2023-04-02 07:00:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440816213] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222035784] [2023-04-02 07:00:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:27,932 INFO L87 Difference]: Start difference. First operand 9365 states and 14920 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 07:00:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:30,180 INFO L93 Difference]: Finished difference Result 18057 states and 28766 transitions. [2023-04-02 07:00:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 138 [2023-04-02 07:00:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:30,216 INFO L225 Difference]: With dead ends: 18057 [2023-04-02 07:00:30,217 INFO L226 Difference]: Without dead ends: 13100 [2023-04-02 07:00:30,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:30,232 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 217 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:30,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1194 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 07:00:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2023-04-02 07:00:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 13098. [2023-04-02 07:00:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13098 states, 13094 states have (on average 1.585688101420498) internal successors, (20763), 13094 states have internal predecessors, (20763), 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 07:00:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13098 states to 13098 states and 20766 transitions. [2023-04-02 07:00:31,449 INFO L78 Accepts]: Start accepts. Automaton has 13098 states and 20766 transitions. Word has length 138 [2023-04-02 07:00:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:31,450 INFO L495 AbstractCegarLoop]: Abstraction has 13098 states and 20766 transitions. [2023-04-02 07:00:31,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 07:00:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13098 states and 20766 transitions. [2023-04-02 07:00:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 07:00:31,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:31,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:31,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 07:00:31,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:31,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1019139882, now seen corresponding path program 1 times [2023-04-02 07:00:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:31,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310166970] [2023-04-02 07:00:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:31,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:31,897 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 07:00:31,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:31,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310166970] [2023-04-02 07:00:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310166970] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:31,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:31,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387058085] [2023-04-02 07:00:31,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:31,903 INFO L87 Difference]: Start difference. First operand 13098 states and 20766 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 07:00:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:34,682 INFO L93 Difference]: Finished difference Result 24978 states and 39604 transitions. [2023-04-02 07:00:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 138 [2023-04-02 07:00:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:34,727 INFO L225 Difference]: With dead ends: 24978 [2023-04-02 07:00:34,727 INFO L226 Difference]: Without dead ends: 18061 [2023-04-02 07:00:34,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:34,745 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 224 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:34,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1248 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 07:00:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18061 states. [2023-04-02 07:00:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18061 to 18059. [2023-04-02 07:00:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18059 states, 18055 states have (on average 1.5771254500138465) internal successors, (28475), 18055 states have internal predecessors, (28475), 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 07:00:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18059 states to 18059 states and 28478 transitions. [2023-04-02 07:00:36,344 INFO L78 Accepts]: Start accepts. Automaton has 18059 states and 28478 transitions. Word has length 138 [2023-04-02 07:00:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:36,344 INFO L495 AbstractCegarLoop]: Abstraction has 18059 states and 28478 transitions. [2023-04-02 07:00:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 07:00:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18059 states and 28478 transitions. [2023-04-02 07:00:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-02 07:00:36,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:36,346 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:36,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 07:00:36,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:36,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:36,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1789328477, now seen corresponding path program 1 times [2023-04-02 07:00:36,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:36,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049488045] [2023-04-02 07:00:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:36,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:36,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:36,781 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 07:00:36,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:36,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049488045] [2023-04-02 07:00:36,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049488045] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:36,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:36,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:00:36,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846286101] [2023-04-02 07:00:36,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:00:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:00:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:00:36,783 INFO L87 Difference]: Start difference. First operand 18059 states and 28478 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 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 07:00:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:39,944 INFO L93 Difference]: Finished difference Result 34221 states and 54011 transitions. [2023-04-02 07:00:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:00:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 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 139 [2023-04-02 07:00:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:40,009 INFO L225 Difference]: With dead ends: 34221 [2023-04-02 07:00:40,010 INFO L226 Difference]: Without dead ends: 24665 [2023-04-02 07:00:40,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:00:40,034 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 208 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:40,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1180 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 07:00:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24665 states. [2023-04-02 07:00:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24665 to 24663. [2023-04-02 07:00:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24663 states, 24659 states have (on average 1.567216837665761) internal successors, (38646), 24659 states have internal predecessors, (38646), 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 07:00:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24663 states to 24663 states and 38649 transitions. [2023-04-02 07:00:41,904 INFO L78 Accepts]: Start accepts. Automaton has 24663 states and 38649 transitions. Word has length 139 [2023-04-02 07:00:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:41,906 INFO L495 AbstractCegarLoop]: Abstraction has 24663 states and 38649 transitions. [2023-04-02 07:00:41,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 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 07:00:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24663 states and 38649 transitions. [2023-04-02 07:00:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-02 07:00:41,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:41,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:41,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 07:00:41,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:41,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash 473121686, now seen corresponding path program 1 times [2023-04-02 07:00:41,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:41,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659621898] [2023-04-02 07:00:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:41,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:42,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:42,717 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 07:00:42,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:42,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659621898] [2023-04-02 07:00:42,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659621898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:42,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:42,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 07:00:42,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665626736] [2023-04-02 07:00:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:42,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 07:00:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 07:00:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 07:00:42,719 INFO L87 Difference]: Start difference. First operand 24663 states and 38649 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 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 07:00:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:46,948 INFO L93 Difference]: Finished difference Result 40794 states and 63577 transitions. [2023-04-02 07:00:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 07:00:46,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 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 144 [2023-04-02 07:00:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:47,149 INFO L225 Difference]: With dead ends: 40794 [2023-04-02 07:00:47,150 INFO L226 Difference]: Without dead ends: 40792 [2023-04-02 07:00:47,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:00:47,166 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 481 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:47,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 2579 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 07:00:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40792 states. [2023-04-02 07:00:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40792 to 24983. [2023-04-02 07:00:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24983 states, 24979 states have (on average 1.556707634412907) internal successors, (38885), 24979 states have internal predecessors, (38885), 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 07:00:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24983 states to 24983 states and 38888 transitions. [2023-04-02 07:00:49,561 INFO L78 Accepts]: Start accepts. Automaton has 24983 states and 38888 transitions. Word has length 144 [2023-04-02 07:00:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:00:49,562 INFO L495 AbstractCegarLoop]: Abstraction has 24983 states and 38888 transitions. [2023-04-02 07:00:49,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 5 states have internal predecessors, (141), 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 07:00:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24983 states and 38888 transitions. [2023-04-02 07:00:49,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-02 07:00:49,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:00:49,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:00:49,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 07:00:49,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:00:49,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:00:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash -756758593, now seen corresponding path program 1 times [2023-04-02 07:00:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:00:49,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907426111] [2023-04-02 07:00:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:00:49,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:00:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:50,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:00:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:00:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 07:00:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:00:50,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907426111] [2023-04-02 07:00:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907426111] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:00:50,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:00:50,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 07:00:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785301483] [2023-04-02 07:00:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:00:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 07:00:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:00:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 07:00:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:00:50,159 INFO L87 Difference]: Start difference. First operand 24983 states and 38888 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 6 states have internal predecessors, (176), 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 07:00:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:00:58,756 INFO L93 Difference]: Finished difference Result 82210 states and 128155 transitions. [2023-04-02 07:00:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 07:00:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 6 states have internal predecessors, (176), 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 180 [2023-04-02 07:00:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:00:58,915 INFO L225 Difference]: With dead ends: 82210 [2023-04-02 07:00:58,915 INFO L226 Difference]: Without dead ends: 72092 [2023-04-02 07:00:58,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 07:00:58,963 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 1457 mSDsluCounter, 2520 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 07:00:58,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 3338 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 07:00:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72092 states. [2023-04-02 07:01:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72092 to 41906. [2023-04-02 07:01:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41906 states, 41902 states have (on average 1.5531000906877954) internal successors, (65078), 41902 states have internal predecessors, (65078), 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 07:01:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41906 states to 41906 states and 65081 transitions. [2023-04-02 07:01:04,551 INFO L78 Accepts]: Start accepts. Automaton has 41906 states and 65081 transitions. Word has length 180 [2023-04-02 07:01:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:01:04,551 INFO L495 AbstractCegarLoop]: Abstraction has 41906 states and 65081 transitions. [2023-04-02 07:01:04,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 6 states have internal predecessors, (176), 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 07:01:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 41906 states and 65081 transitions. [2023-04-02 07:01:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-02 07:01:04,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:01:04,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:01:04,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 07:01:04,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:01:04,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:01:04,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2101104331, now seen corresponding path program 1 times [2023-04-02 07:01:04,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:01:04,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689908166] [2023-04-02 07:01:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:01:04,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:01:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:01:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:01:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:01:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 07:01:05,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:01:05,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689908166] [2023-04-02 07:01:05,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689908166] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:01:05,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:01:05,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 07:01:05,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531393587] [2023-04-02 07:01:05,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:01:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 07:01:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:01:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 07:01:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:01:05,165 INFO L87 Difference]: Start difference. First operand 41906 states and 65081 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 6 states have internal predecessors, (162), 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 07:01:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:01:16,069 INFO L93 Difference]: Finished difference Result 96782 states and 150806 transitions. [2023-04-02 07:01:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 07:01:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 6 states have internal predecessors, (162), 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 180 [2023-04-02 07:01:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:01:16,274 INFO L225 Difference]: With dead ends: 96782 [2023-04-02 07:01:16,274 INFO L226 Difference]: Without dead ends: 80400 [2023-04-02 07:01:16,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 07:01:16,331 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 1476 mSDsluCounter, 2439 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 3255 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 07:01:16,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 3255 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 07:01:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80400 states. [2023-04-02 07:01:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80400 to 60574. [2023-04-02 07:01:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60574 states, 60570 states have (on average 1.5533432392273403) internal successors, (94086), 60570 states have internal predecessors, (94086), 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 07:01:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60574 states to 60574 states and 94089 transitions. [2023-04-02 07:01:23,935 INFO L78 Accepts]: Start accepts. Automaton has 60574 states and 94089 transitions. Word has length 180 [2023-04-02 07:01:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:01:23,935 INFO L495 AbstractCegarLoop]: Abstraction has 60574 states and 94089 transitions. [2023-04-02 07:01:23,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 6 states have internal predecessors, (162), 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 07:01:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60574 states and 94089 transitions. [2023-04-02 07:01:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-02 07:01:23,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:01:23,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:01:23,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 07:01:23,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:01:23,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:01:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1069529757, now seen corresponding path program 1 times [2023-04-02 07:01:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:01:23,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695839635] [2023-04-02 07:01:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:01:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:01:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:01:24,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:01:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:01:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 07:01:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:01:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695839635] [2023-04-02 07:01:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695839635] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:01:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:01:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 07:01:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628829711] [2023-04-02 07:01:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:01:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 07:01:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:01:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 07:01:24,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:01:24,663 INFO L87 Difference]: Start difference. First operand 60574 states and 94089 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 6 states have internal predecessors, (169), 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 07:01:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:01:37,248 INFO L93 Difference]: Finished difference Result 109777 states and 171018 transitions. [2023-04-02 07:01:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 07:01:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 6 states have internal predecessors, (169), 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 180 [2023-04-02 07:01:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:01:37,435 INFO L225 Difference]: With dead ends: 109777 [2023-04-02 07:01:37,435 INFO L226 Difference]: Without dead ends: 93395 [2023-04-02 07:01:37,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 07:01:37,481 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 1622 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1622 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 07:01:37,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1622 Valid, 3189 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 07:01:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93395 states. [2023-04-02 07:01:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93395 to 74184. [2023-04-02 07:01:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74184 states, 74180 states have (on average 1.5534780264222163) internal successors, (115237), 74180 states have internal predecessors, (115237), 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 07:01:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74184 states to 74184 states and 115240 transitions. [2023-04-02 07:01:47,089 INFO L78 Accepts]: Start accepts. Automaton has 74184 states and 115240 transitions. Word has length 180 [2023-04-02 07:01:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:01:47,090 INFO L495 AbstractCegarLoop]: Abstraction has 74184 states and 115240 transitions. [2023-04-02 07:01:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 6 states have internal predecessors, (169), 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 07:01:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 74184 states and 115240 transitions. [2023-04-02 07:01:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-02 07:01:47,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:01:47,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:01:47,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 07:01:47,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:01:47,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:01:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash -63199260, now seen corresponding path program 1 times [2023-04-02 07:01:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:01:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676658493] [2023-04-02 07:01:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:01:47,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:01:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:01:47,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:01:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:01:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 07:01:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:01:47,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676658493] [2023-04-02 07:01:47,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676658493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:01:47,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:01:47,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 07:01:47,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271698226] [2023-04-02 07:01:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:01:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 07:01:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:01:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 07:01:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 07:01:47,638 INFO L87 Difference]: Start difference. First operand 74184 states and 115240 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 07:02:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:02:03,357 INFO L93 Difference]: Finished difference Result 158020 states and 245920 transitions. [2023-04-02 07:02:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 07:02:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 181 [2023-04-02 07:02:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:02:03,603 INFO L225 Difference]: With dead ends: 158020 [2023-04-02 07:02:03,603 INFO L226 Difference]: Without dead ends: 119896 [2023-04-02 07:02:03,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:02:03,675 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 201 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 07:02:03,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1074 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 07:02:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119896 states. [2023-04-02 07:02:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119896 to 119742. [2023-04-02 07:02:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119742 states, 119738 states have (on average 1.5537005795987906) internal successors, (186037), 119738 states have internal predecessors, (186037), 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 07:02:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119742 states to 119742 states and 186040 transitions. [2023-04-02 07:02:19,027 INFO L78 Accepts]: Start accepts. Automaton has 119742 states and 186040 transitions. Word has length 181 [2023-04-02 07:02:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:02:19,027 INFO L495 AbstractCegarLoop]: Abstraction has 119742 states and 186040 transitions. [2023-04-02 07:02:19,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 07:02:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 119742 states and 186040 transitions. [2023-04-02 07:02:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-02 07:02:19,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:02:19,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:02:19,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 07:02:19,034 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:02:19,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:02:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2050848155, now seen corresponding path program 1 times [2023-04-02 07:02:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:02:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810575597] [2023-04-02 07:02:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:02:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:02:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:02:19,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:02:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:02:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 07:02:19,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:02:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810575597] [2023-04-02 07:02:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810575597] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:02:19,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:02:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 07:02:19,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768157998] [2023-04-02 07:02:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:02:19,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 07:02:19,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:02:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 07:02:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 07:02:19,730 INFO L87 Difference]: Start difference. First operand 119742 states and 186040 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 4 states have internal predecessors, (177), 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 07:02:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 07:02:39,772 INFO L93 Difference]: Finished difference Result 198462 states and 308912 transitions. [2023-04-02 07:02:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 07:02:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 4 states have internal predecessors, (177), 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 181 [2023-04-02 07:02:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 07:02:40,152 INFO L225 Difference]: With dead ends: 198462 [2023-04-02 07:02:40,153 INFO L226 Difference]: Without dead ends: 158881 [2023-04-02 07:02:40,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 07:02:40,221 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 427 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 07:02:40,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1907 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 07:02:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158881 states. [2023-04-02 07:02:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158881 to 142812. [2023-04-02 07:02:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142812 states, 142808 states have (on average 1.5527141336619796) internal successors, (221740), 142808 states have internal predecessors, (221740), 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 07:02:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142812 states to 142812 states and 221743 transitions. [2023-04-02 07:02:58,596 INFO L78 Accepts]: Start accepts. Automaton has 142812 states and 221743 transitions. Word has length 181 [2023-04-02 07:02:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 07:02:58,597 INFO L495 AbstractCegarLoop]: Abstraction has 142812 states and 221743 transitions. [2023-04-02 07:02:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 4 states have internal predecessors, (177), 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 07:02:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 142812 states and 221743 transitions. [2023-04-02 07:02:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-02 07:02:58,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 07:02:58,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:02:58,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 07:02:58,602 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 07:02:58,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 07:02:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2113577846, now seen corresponding path program 1 times [2023-04-02 07:02:58,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 07:02:58,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460296346] [2023-04-02 07:02:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 07:02:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 07:02:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:02:59,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 07:02:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 07:02:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 07:02:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 07:02:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460296346] [2023-04-02 07:02:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460296346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 07:02:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 07:02:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 07:02:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987080244] [2023-04-02 07:02:59,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 07:02:59,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 07:02:59,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 07:02:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 07:02:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 07:02:59,405 INFO L87 Difference]: Start difference. First operand 142812 states and 221743 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 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)