/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 05:51:44,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 05:51:44,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 05:51:44,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 05:51:44,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 05:51:44,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 05:51:44,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 05:51:44,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 05:51:44,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 05:51:44,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 05:51:44,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 05:51:44,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 05:51:44,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 05:51:44,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 05:51:44,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 05:51:44,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 05:51:44,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 05:51:44,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 05:51:44,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 05:51:44,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 05:51:44,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 05:51:44,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 05:51:44,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 05:51:44,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 05:51:44,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 05:51:44,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 05:51:44,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 05:51:44,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 05:51:44,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 05:51:44,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 05:51:44,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 05:51:44,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 05:51:44,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 05:51:44,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 05:51:44,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 05:51:44,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 05:51:44,725 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 05:51:44,752 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 05:51:44,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 05:51:44,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 05:51:44,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 05:51:44,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 05:51:44,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 05:51:44,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 05:51:44,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 05:51:44,756 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 05:51:44,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 05:51:44,756 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 05:51:44,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 05:51:44,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 05:51:44,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 05:51:44,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 05:51:44,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 05:51:44,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 05:51:44,758 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 05:51:44,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 05:51:44,758 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 05:51:44,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 05:51:44,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 05:51:44,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 05:51:44,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 05:51:44,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:51:44,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 05:51:44,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 05:51:44,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 05:51:44,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 05:51:44,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 05:51:44,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 05:51:44,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 05:51:44,760 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 05:51:44,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 05:51:44,760 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 05:51:44,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 05:51:44,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 05:51:45,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 05:51:45,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 05:51:45,029 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 05:51:45,029 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 05:51:45,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 05:51:46,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 05:51:46,540 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 05:51:46,541 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 05:51:46,564 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfc42c79/328824efa987401d81d4e1535926f9f5/FLAGf848c21c9 [2023-04-02 05:51:46,577 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfc42c79/328824efa987401d81d4e1535926f9f5 [2023-04-02 05:51:46,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 05:51:46,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 05:51:46,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 05:51:46,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 05:51:46,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 05:51:46,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:51:46" (1/1) ... [2023-04-02 05:51:46,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c429061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:46, skipping insertion in model container [2023-04-02 05:51:46,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:51:46" (1/1) ... [2023-04-02 05:51:46,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 05:51:46,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 05:51:47,007 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2023-04-02 05:51:47,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:51:47,175 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 05:51:47,417 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2023-04-02 05:51:47,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:51:47,520 INFO L208 MainTranslator]: Completed translation [2023-04-02 05:51:47,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47 WrapperNode [2023-04-02 05:51:47,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 05:51:47,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 05:51:47,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 05:51:47,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 05:51:47,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 05:51:47,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 05:51:47,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 05:51:47,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 05:51:47,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (1/1) ... [2023-04-02 05:51:47,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:51:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 05:51:47,677 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 05:51:47,703 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 05:51:47,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 05:51:47,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 05:51:47,725 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 05:51:47,725 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 05:51:47,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 05:51:47,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 05:51:47,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 05:51:47,726 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 05:51:47,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 05:51:47,881 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 05:51:47,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 05:51:49,336 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 05:51:49,353 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 05:51:49,354 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 05:51:49,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:51:49 BoogieIcfgContainer [2023-04-02 05:51:49,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 05:51:49,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 05:51:49,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 05:51:49,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 05:51:49,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 05:51:46" (1/3) ... [2023-04-02 05:51:49,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8162b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:51:49, skipping insertion in model container [2023-04-02 05:51:49,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:51:47" (2/3) ... [2023-04-02 05:51:49,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8162b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:51:49, skipping insertion in model container [2023-04-02 05:51:49,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:51:49" (3/3) ... [2023-04-02 05:51:49,365 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 05:51:49,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 05:51:49,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 05:51:49,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 05:51:49,453 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;@7d730fff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 05:51:49,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 05:51:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 604 states, 591 states have (on average 1.7868020304568528) internal successors, (1056), 599 states have internal predecessors, (1056), 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 05:51:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-04-02 05:51:49,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:51:49,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:49,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:51:49,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:51:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2084511130, now seen corresponding path program 1 times [2023-04-02 05:51:49,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:51:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492864489] [2023-04-02 05:51:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:51:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:51:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:51:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:51:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:51:51,394 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 05:51:51,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:51:51,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492864489] [2023-04-02 05:51:51,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492864489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:51:51,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:51:51,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 05:51:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153562723] [2023-04-02 05:51:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:51:51,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 05:51:51,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:51:51,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 05:51:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:51:51,450 INFO L87 Difference]: Start difference. First operand has 604 states, 591 states have (on average 1.7868020304568528) internal successors, (1056), 599 states have internal predecessors, (1056), 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 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 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 05:51:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:51:55,470 INFO L93 Difference]: Finished difference Result 1769 states and 3113 transitions. [2023-04-02 05:51:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 05:51:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 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 242 [2023-04-02 05:51:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:51:55,489 INFO L225 Difference]: With dead ends: 1769 [2023-04-02 05:51:55,490 INFO L226 Difference]: Without dead ends: 1156 [2023-04-02 05:51:55,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:51:55,498 INFO L413 NwaCegarLoop]: 1691 mSDtfsCounter, 2320 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2320 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-02 05:51:55,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2320 Valid, 2701 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-02 05:51:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2023-04-02 05:51:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1154. [2023-04-02 05:51:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1150 states have (on average 1.5460869565217392) internal successors, (1778), 1150 states have internal predecessors, (1778), 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 05:51:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1781 transitions. [2023-04-02 05:51:55,619 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1781 transitions. Word has length 242 [2023-04-02 05:51:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:51:55,621 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1781 transitions. [2023-04-02 05:51:55,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 4 states have internal predecessors, (239), 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 05:51:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1781 transitions. [2023-04-02 05:51:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-04-02 05:51:55,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:51:55,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:51:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 05:51:55,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:51:55,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:51:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash 638389095, now seen corresponding path program 1 times [2023-04-02 05:51:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:51:55,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058404794] [2023-04-02 05:51:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:51:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:51:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:51:56,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:51:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:51:56,323 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 05:51:56,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:51:56,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058404794] [2023-04-02 05:51:56,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058404794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:51:56,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:51:56,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:51:56,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267836428] [2023-04-02 05:51:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:51:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:51:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:51:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:51:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:51:56,329 INFO L87 Difference]: Start difference. First operand 1154 states and 1781 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 05:52:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:00,087 INFO L93 Difference]: Finished difference Result 3289 states and 5047 transitions. [2023-04-02 05:52:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:52:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 244 [2023-04-02 05:52:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:00,099 INFO L225 Difference]: With dead ends: 3289 [2023-04-02 05:52:00,099 INFO L226 Difference]: Without dead ends: 2264 [2023-04-02 05:52:00,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:00,106 INFO L413 NwaCegarLoop]: 1716 mSDtfsCounter, 781 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 2591 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:00,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 2591 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 05:52:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2023-04-02 05:52:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2262. [2023-04-02 05:52:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2258 states have (on average 1.537643932683791) internal successors, (3472), 2258 states have internal predecessors, (3472), 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 05:52:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3475 transitions. [2023-04-02 05:52:00,240 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3475 transitions. Word has length 244 [2023-04-02 05:52:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:00,241 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 3475 transitions. [2023-04-02 05:52:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 05:52:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3475 transitions. [2023-04-02 05:52:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-04-02 05:52:00,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:00,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:00,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 05:52:00,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:00,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1577105876, now seen corresponding path program 1 times [2023-04-02 05:52:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:00,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126750786] [2023-04-02 05:52:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:00,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:00,759 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 05:52:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126750786] [2023-04-02 05:52:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126750786] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:00,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:00,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:52:00,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190979127] [2023-04-02 05:52:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:00,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:52:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:52:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:00,763 INFO L87 Difference]: Start difference. First operand 2262 states and 3475 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 05:52:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:04,427 INFO L93 Difference]: Finished difference Result 6711 states and 10301 transitions. [2023-04-02 05:52:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:52:04,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 244 [2023-04-02 05:52:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:04,445 INFO L225 Difference]: With dead ends: 6711 [2023-04-02 05:52:04,445 INFO L226 Difference]: Without dead ends: 4491 [2023-04-02 05:52:04,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:04,451 INFO L413 NwaCegarLoop]: 1806 mSDtfsCounter, 899 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:04,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 2711 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-02 05:52:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2023-04-02 05:52:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 2281. [2023-04-02 05:52:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5371102327624067) internal successors, (3500), 2277 states have internal predecessors, (3500), 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 05:52:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3503 transitions. [2023-04-02 05:52:04,627 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3503 transitions. Word has length 244 [2023-04-02 05:52:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:04,628 INFO L495 AbstractCegarLoop]: Abstraction has 2281 states and 3503 transitions. [2023-04-02 05:52:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 05:52:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3503 transitions. [2023-04-02 05:52:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-04-02 05:52:04,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:04,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:04,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 05:52:04,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:04,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash -308897888, now seen corresponding path program 1 times [2023-04-02 05:52:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:04,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894961121] [2023-04-02 05:52:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:05,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:05,102 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 05:52:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894961121] [2023-04-02 05:52:05,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894961121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:05,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:05,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:52:05,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007323212] [2023-04-02 05:52:05,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:05,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:52:05,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:05,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:52:05,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:05,105 INFO L87 Difference]: Start difference. First operand 2281 states and 3503 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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 05:52:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:08,613 INFO L93 Difference]: Finished difference Result 6730 states and 10322 transitions. [2023-04-02 05:52:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:52:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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 245 [2023-04-02 05:52:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:08,630 INFO L225 Difference]: With dead ends: 6730 [2023-04-02 05:52:08,630 INFO L226 Difference]: Without dead ends: 4509 [2023-04-02 05:52:08,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:08,636 INFO L413 NwaCegarLoop]: 1806 mSDtfsCounter, 894 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:08,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 2711 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 05:52:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4509 states. [2023-04-02 05:52:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4509 to 2299. [2023-04-02 05:52:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2295 states have (on average 1.5342047930283225) internal successors, (3521), 2295 states have internal predecessors, (3521), 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 05:52:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3524 transitions. [2023-04-02 05:52:08,856 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3524 transitions. Word has length 245 [2023-04-02 05:52:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:08,856 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 3524 transitions. [2023-04-02 05:52:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 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 05:52:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3524 transitions. [2023-04-02 05:52:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-02 05:52:08,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:08,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:08,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 05:52:08,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:08,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1209146718, now seen corresponding path program 1 times [2023-04-02 05:52:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:08,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362979990] [2023-04-02 05:52:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:08,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:09,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:09,343 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 05:52:09,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362979990] [2023-04-02 05:52:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362979990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:09,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:09,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:52:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75175048] [2023-04-02 05:52:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:09,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:52:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:52:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:09,346 INFO L87 Difference]: Start difference. First operand 2299 states and 3524 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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 05:52:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:12,631 INFO L93 Difference]: Finished difference Result 6474 states and 9861 transitions. [2023-04-02 05:52:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:52:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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 246 [2023-04-02 05:52:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:12,647 INFO L225 Difference]: With dead ends: 6474 [2023-04-02 05:52:12,647 INFO L226 Difference]: Without dead ends: 4420 [2023-04-02 05:52:12,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:12,652 INFO L413 NwaCegarLoop]: 1778 mSDtfsCounter, 774 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:12,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 2653 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 05:52:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2023-04-02 05:52:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 4418. [2023-04-02 05:52:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4414 states have (on average 1.5217489805165383) internal successors, (6717), 4414 states have internal predecessors, (6717), 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 05:52:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 6720 transitions. [2023-04-02 05:52:13,002 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 6720 transitions. Word has length 246 [2023-04-02 05:52:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:13,002 INFO L495 AbstractCegarLoop]: Abstraction has 4418 states and 6720 transitions. [2023-04-02 05:52:13,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 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 05:52:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 6720 transitions. [2023-04-02 05:52:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-02 05:52:13,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:13,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 05:52:13,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:13,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1562057025, now seen corresponding path program 1 times [2023-04-02 05:52:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000487937] [2023-04-02 05:52:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:13,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:13,854 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 05:52:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000487937] [2023-04-02 05:52:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000487937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:13,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 05:52:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391636479] [2023-04-02 05:52:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 05:52:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 05:52:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:52:13,857 INFO L87 Difference]: Start difference. First operand 4418 states and 6720 transitions. Second operand has 6 states, 6 states have (on average 40.5) internal successors, (243), 5 states have internal predecessors, (243), 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 05:52:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:17,069 INFO L93 Difference]: Finished difference Result 12804 states and 19425 transitions. [2023-04-02 05:52:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:52:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.5) internal successors, (243), 5 states have internal predecessors, (243), 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 246 [2023-04-02 05:52:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:17,095 INFO L225 Difference]: With dead ends: 12804 [2023-04-02 05:52:17,095 INFO L226 Difference]: Without dead ends: 8445 [2023-04-02 05:52:17,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:52:17,109 INFO L413 NwaCegarLoop]: 1403 mSDtfsCounter, 2919 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2919 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:17,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2919 Valid, 2272 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:52:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8445 states. [2023-04-02 05:52:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8445 to 8443. [2023-04-02 05:52:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8443 states, 8439 states have (on average 1.505628628984477) internal successors, (12706), 8439 states have internal predecessors, (12706), 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 05:52:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8443 states to 8443 states and 12709 transitions. [2023-04-02 05:52:17,855 INFO L78 Accepts]: Start accepts. Automaton has 8443 states and 12709 transitions. Word has length 246 [2023-04-02 05:52:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:17,856 INFO L495 AbstractCegarLoop]: Abstraction has 8443 states and 12709 transitions. [2023-04-02 05:52:17,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.5) internal successors, (243), 5 states have internal predecessors, (243), 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 05:52:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 8443 states and 12709 transitions. [2023-04-02 05:52:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-02 05:52:17,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:17,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 05:52:17,874 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:17,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 660915978, now seen corresponding path program 1 times [2023-04-02 05:52:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121043869] [2023-04-02 05:52:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:18,337 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 05:52:18,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:18,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121043869] [2023-04-02 05:52:18,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121043869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:18,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:18,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:52:18,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258972030] [2023-04-02 05:52:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:52:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:52:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:18,339 INFO L87 Difference]: Start difference. First operand 8443 states and 12709 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 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 05:52:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:22,484 INFO L93 Difference]: Finished difference Result 24413 states and 36606 transitions. [2023-04-02 05:52:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:52:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 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 248 [2023-04-02 05:52:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:22,526 INFO L225 Difference]: With dead ends: 24413 [2023-04-02 05:52:22,526 INFO L226 Difference]: Without dead ends: 16491 [2023-04-02 05:52:22,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:22,545 INFO L413 NwaCegarLoop]: 1764 mSDtfsCounter, 761 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:22,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 2639 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-02 05:52:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16491 states. [2023-04-02 05:52:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16491 to 16489. [2023-04-02 05:52:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16489 states, 16485 states have (on average 1.4953594176524112) internal successors, (24651), 16485 states have internal predecessors, (24651), 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 05:52:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16489 states to 16489 states and 24654 transitions. [2023-04-02 05:52:23,689 INFO L78 Accepts]: Start accepts. Automaton has 16489 states and 24654 transitions. Word has length 248 [2023-04-02 05:52:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:23,689 INFO L495 AbstractCegarLoop]: Abstraction has 16489 states and 24654 transitions. [2023-04-02 05:52:23,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 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 05:52:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 16489 states and 24654 transitions. [2023-04-02 05:52:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-02 05:52:23,721 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:23,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:23,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 05:52:23,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:23,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash -778555801, now seen corresponding path program 1 times [2023-04-02 05:52:23,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:23,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459563558] [2023-04-02 05:52:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:24,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:24,552 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 05:52:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459563558] [2023-04-02 05:52:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459563558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:24,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 05:52:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321029212] [2023-04-02 05:52:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:24,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 05:52:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 05:52:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:52:24,554 INFO L87 Difference]: Start difference. First operand 16489 states and 24654 transitions. Second operand has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 5 states have internal predecessors, (245), 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 05:52:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:29,297 INFO L93 Difference]: Finished difference Result 48416 states and 72256 transitions. [2023-04-02 05:52:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:52:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 5 states have internal predecessors, (245), 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 248 [2023-04-02 05:52:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:29,383 INFO L225 Difference]: With dead ends: 48416 [2023-04-02 05:52:29,383 INFO L226 Difference]: Without dead ends: 32082 [2023-04-02 05:52:29,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:52:29,420 INFO L413 NwaCegarLoop]: 1451 mSDtfsCounter, 2852 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2852 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:29,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2852 Valid, 2320 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:52:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32082 states. [2023-04-02 05:52:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32082 to 32080. [2023-04-02 05:52:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32080 states, 32076 states have (on average 1.4820114727522136) internal successors, (47537), 32076 states have internal predecessors, (47537), 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 05:52:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32080 states to 32080 states and 47540 transitions. [2023-04-02 05:52:32,181 INFO L78 Accepts]: Start accepts. Automaton has 32080 states and 47540 transitions. Word has length 248 [2023-04-02 05:52:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:32,182 INFO L495 AbstractCegarLoop]: Abstraction has 32080 states and 47540 transitions. [2023-04-02 05:52:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 5 states have internal predecessors, (245), 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 05:52:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32080 states and 47540 transitions. [2023-04-02 05:52:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-02 05:52:32,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:32,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:32,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 05:52:32,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:32,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1159671569, now seen corresponding path program 1 times [2023-04-02 05:52:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630595104] [2023-04-02 05:52:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:32,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:32,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:32,986 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 05:52:32,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:32,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630595104] [2023-04-02 05:52:32,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630595104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:32,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:32,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 05:52:32,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086930195] [2023-04-02 05:52:32,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:32,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 05:52:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 05:52:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:52:32,988 INFO L87 Difference]: Start difference. First operand 32080 states and 47540 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 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 05:52:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:40,289 INFO L93 Difference]: Finished difference Result 94603 states and 139977 transitions. [2023-04-02 05:52:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:52:40,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 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 248 [2023-04-02 05:52:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:52:40,405 INFO L225 Difference]: With dead ends: 94603 [2023-04-02 05:52:40,406 INFO L226 Difference]: Without dead ends: 62809 [2023-04-02 05:52:40,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:52:40,465 INFO L413 NwaCegarLoop]: 1440 mSDtfsCounter, 1938 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:52:40,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1938 Valid, 2309 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:52:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62809 states. [2023-04-02 05:52:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62809 to 62807. [2023-04-02 05:52:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62807 states, 62803 states have (on average 1.4689903348566151) internal successors, (92257), 62803 states have internal predecessors, (92257), 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 05:52:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62807 states to 62807 states and 92260 transitions. [2023-04-02 05:52:46,157 INFO L78 Accepts]: Start accepts. Automaton has 62807 states and 92260 transitions. Word has length 248 [2023-04-02 05:52:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:52:46,157 INFO L495 AbstractCegarLoop]: Abstraction has 62807 states and 92260 transitions. [2023-04-02 05:52:46,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 4 states have internal predecessors, (245), 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 05:52:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 62807 states and 92260 transitions. [2023-04-02 05:52:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-02 05:52:46,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:52:46,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:52:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 05:52:46,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:52:46,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:52:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2143529959, now seen corresponding path program 1 times [2023-04-02 05:52:46,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:52:46,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833656599] [2023-04-02 05:52:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:52:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:52:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:46,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:52:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:52:46,713 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 05:52:46,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:52:46,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833656599] [2023-04-02 05:52:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833656599] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:52:46,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:52:46,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:52:46,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736072568] [2023-04-02 05:52:46,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:52:46,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:52:46,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:52:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:52:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:52:46,715 INFO L87 Difference]: Start difference. First operand 62807 states and 92260 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 05:52:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:52:59,941 INFO L93 Difference]: Finished difference Result 183724 states and 269000 transitions. [2023-04-02 05:52:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:52:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 250 [2023-04-02 05:52:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:53:00,228 INFO L225 Difference]: With dead ends: 183724 [2023-04-02 05:53:00,229 INFO L226 Difference]: Without dead ends: 123434 [2023-04-02 05:53:00,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:53:00,327 INFO L413 NwaCegarLoop]: 1710 mSDtfsCounter, 755 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 05:53:00,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 2585 Invalid, 1758 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [18 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 05:53:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123434 states. [2023-04-02 05:53:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123434 to 123432. [2023-04-02 05:53:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123432 states, 123428 states have (on average 1.4577162394270344) internal successors, (179923), 123428 states have internal predecessors, (179923), 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 05:53:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123432 states to 123432 states and 179926 transitions. [2023-04-02 05:53:11,946 INFO L78 Accepts]: Start accepts. Automaton has 123432 states and 179926 transitions. Word has length 250 [2023-04-02 05:53:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:53:11,946 INFO L495 AbstractCegarLoop]: Abstraction has 123432 states and 179926 transitions. [2023-04-02 05:53:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 05:53:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 123432 states and 179926 transitions. [2023-04-02 05:53:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-02 05:53:12,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:53:12,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:53:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 05:53:12,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:53:12,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:53:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 26648172, now seen corresponding path program 1 times [2023-04-02 05:53:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:53:12,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888504282] [2023-04-02 05:53:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:53:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:53:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:53:12,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:53:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:53:12,904 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 05:53:12,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:53:12,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888504282] [2023-04-02 05:53:12,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888504282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:53:12,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:53:12,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:53:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771564531] [2023-04-02 05:53:12,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:53:12,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:53:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:53:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:53:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:53:12,912 INFO L87 Difference]: Start difference. First operand 123432 states and 179926 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 05:53:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:53:37,586 INFO L93 Difference]: Finished difference Result 365104 states and 531070 transitions. [2023-04-02 05:53:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 05:53:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 250 [2023-04-02 05:53:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:53:38,384 INFO L225 Difference]: With dead ends: 365104 [2023-04-02 05:53:38,385 INFO L226 Difference]: Without dead ends: 242772 [2023-04-02 05:53:38,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:53:38,537 INFO L413 NwaCegarLoop]: 1773 mSDtfsCounter, 866 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 2678 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 05:53:38,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 2678 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 05:53:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242772 states. [2023-04-02 05:53:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242772 to 123658. [2023-04-02 05:53:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123658 states, 123654 states have (on average 1.4573810794636648) internal successors, (180211), 123654 states have internal predecessors, (180211), 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 05:53:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123658 states to 123658 states and 180214 transitions. [2023-04-02 05:53:52,724 INFO L78 Accepts]: Start accepts. Automaton has 123658 states and 180214 transitions. Word has length 250 [2023-04-02 05:53:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:53:52,725 INFO L495 AbstractCegarLoop]: Abstraction has 123658 states and 180214 transitions. [2023-04-02 05:53:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 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 05:53:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 123658 states and 180214 transitions. [2023-04-02 05:53:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-04-02 05:53:52,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:53:52,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:53:52,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 05:53:52,850 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:53:52,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:53:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2140085158, now seen corresponding path program 1 times [2023-04-02 05:53:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:53:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615885757] [2023-04-02 05:53:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:53:52,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:53:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:53:53,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:53:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:53:53,238 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 05:53:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:53:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615885757] [2023-04-02 05:53:53,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615885757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:53:53,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:53:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:53:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243483961] [2023-04-02 05:53:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:53:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:53:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:53:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:53:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:53:53,240 INFO L87 Difference]: Start difference. First operand 123658 states and 180214 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 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)