/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.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 05:57:23,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 05:57:23,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 05:57:23,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 05:57:23,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 05:57:23,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 05:57:23,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 05:57:23,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 05:57:23,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 05:57:23,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 05:57:23,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 05:57:23,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 05:57:23,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 05:57:23,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 05:57:23,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 05:57:23,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 05:57:23,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 05:57:23,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 05:57:23,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 05:57:23,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 05:57:23,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 05:57:23,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 05:57:23,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 05:57:23,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 05:57:23,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 05:57:23,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 05:57:23,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 05:57:23,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 05:57:23,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 05:57:23,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 05:57:23,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 05:57:23,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 05:57:23,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 05:57:23,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 05:57:23,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 05:57:23,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 05:57:23,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 05:57:23,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 05:57:23,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 05:57:23,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 05:57:23,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 05:57:23,416 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 05:57:23,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 05:57:23,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 05:57:23,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 05:57:23,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 05:57:23,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 05:57:23,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 05:57:23,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 05:57:23,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 05:57:23,431 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 05:57:23,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 05:57:23,432 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 05:57:23,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 05:57:23,433 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 05:57:23,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 05:57:23,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 05:57:23,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 05:57:23,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 05:57:23,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:57:23,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 05:57:23,434 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 05:57:23,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 05:57:23,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 05:57:23,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 05:57:23,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 05:57:23,647 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 05:57:23,647 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 05:57:23,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 05:57:24,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 05:57:24,928 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 05:57:24,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 05:57:24,940 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/773a3cfc6/c43ea719e01240d7b49d7165caecb43c/FLAG9a9bbc582 [2023-04-02 05:57:24,950 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/773a3cfc6/c43ea719e01240d7b49d7165caecb43c [2023-04-02 05:57:24,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 05:57:24,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 05:57:24,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 05:57:24,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 05:57:24,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 05:57:24,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:57:24" (1/1) ... [2023-04-02 05:57:24,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408c3b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:24, skipping insertion in model container [2023-04-02 05:57:24,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:57:24" (1/1) ... [2023-04-02 05:57:24,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 05:57:25,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 05:57:25,292 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.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21939,21952] [2023-04-02 05:57:25,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:57:25,453 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 05:57:25,583 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.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21939,21952] [2023-04-02 05:57:25,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:57:25,672 INFO L208 MainTranslator]: Completed translation [2023-04-02 05:57:25,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25 WrapperNode [2023-04-02 05:57:25,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 05:57:25,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 05:57:25,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 05:57:25,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 05:57:25,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 05:57:25,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 05:57:25,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 05:57:25,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 05:57:25,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (1/1) ... [2023-04-02 05:57:25,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:57:25,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 05:57:25,838 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 05:57:25,860 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 05:57:25,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 05:57:25,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 05:57:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 05:57:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 05:57:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 05:57:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 05:57:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 05:57:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 05:57:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 05:57:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 05:57:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 05:57:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 05:57:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 05:57:26,049 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 05:57:26,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 05:57:27,278 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 05:57:27,292 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 05:57:27,292 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 05:57:27,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:57:27 BoogieIcfgContainer [2023-04-02 05:57:27,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 05:57:27,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 05:57:27,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 05:57:27,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 05:57:27,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 05:57:24" (1/3) ... [2023-04-02 05:57:27,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae63d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:57:27, skipping insertion in model container [2023-04-02 05:57:27,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:57:25" (2/3) ... [2023-04-02 05:57:27,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae63d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:57:27, skipping insertion in model container [2023-04-02 05:57:27,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:57:27" (3/3) ... [2023-04-02 05:57:27,344 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 05:57:27,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 05:57:27,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 05:57:27,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 05:57:27,426 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;@6efc20b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 05:57:27,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 05:57:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 758 states, 744 states have (on average 1.836021505376344) internal successors, (1366), 753 states have internal predecessors, (1366), 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 05:57:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-04-02 05:57:27,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:27,456 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] [2023-04-02 05:57:27,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:27,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2034350210, now seen corresponding path program 1 times [2023-04-02 05:57:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671053257] [2023-04-02 05:57:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:28,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:28,744 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 05:57:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:28,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671053257] [2023-04-02 05:57:28,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671053257] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:28,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:28,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702793167] [2023-04-02 05:57:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:28,775 INFO L87 Difference]: Start difference. First operand has 758 states, 744 states have (on average 1.836021505376344) internal successors, (1366), 753 states have internal predecessors, (1366), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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 05:57:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:32,379 INFO L93 Difference]: Finished difference Result 1165 states and 2029 transitions. [2023-04-02 05:57:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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 207 [2023-04-02 05:57:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:32,394 INFO L225 Difference]: With dead ends: 1165 [2023-04-02 05:57:32,395 INFO L226 Difference]: Without dead ends: 931 [2023-04-02 05:57:32,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:32,400 INFO L413 NwaCegarLoop]: 1363 mSDtfsCounter, 356 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:32,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 2624 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 05:57:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-02 05:57:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 928. [2023-04-02 05:57:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 924 states have (on average 1.7218614718614718) internal successors, (1591), 924 states have internal predecessors, (1591), 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 05:57:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1594 transitions. [2023-04-02 05:57:32,502 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1594 transitions. Word has length 207 [2023-04-02 05:57:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:32,504 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1594 transitions. [2023-04-02 05:57:32,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 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 05:57:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1594 transitions. [2023-04-02 05:57:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-04-02 05:57:32,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:32,510 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] [2023-04-02 05:57:32,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 05:57:32,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:32,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash 478490527, now seen corresponding path program 1 times [2023-04-02 05:57:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:32,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464206067] [2023-04-02 05:57:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:33,245 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 05:57:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464206067] [2023-04-02 05:57:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464206067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:33,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287223436] [2023-04-02 05:57:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:33,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:33,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:33,250 INFO L87 Difference]: Start difference. First operand 928 states and 1594 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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 05:57:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:36,342 INFO L93 Difference]: Finished difference Result 1668 states and 2806 transitions. [2023-04-02 05:57:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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 211 [2023-04-02 05:57:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:36,347 INFO L225 Difference]: With dead ends: 1668 [2023-04-02 05:57:36,347 INFO L226 Difference]: Without dead ends: 1287 [2023-04-02 05:57:36,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:36,356 INFO L413 NwaCegarLoop]: 1290 mSDtfsCounter, 299 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:36,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 2529 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:57:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2023-04-02 05:57:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1283. [2023-04-02 05:57:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1279 states have (on average 1.6958561376075059) internal successors, (2169), 1279 states have internal predecessors, (2169), 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 05:57:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2172 transitions. [2023-04-02 05:57:36,410 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2172 transitions. Word has length 211 [2023-04-02 05:57:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:36,411 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 2172 transitions. [2023-04-02 05:57:36,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 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 05:57:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2172 transitions. [2023-04-02 05:57:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-02 05:57:36,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:36,414 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] [2023-04-02 05:57:36,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 05:57:36,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:36,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash 393667618, now seen corresponding path program 1 times [2023-04-02 05:57:36,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:36,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462756462] [2023-04-02 05:57:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:36,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:37,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:37,105 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 05:57:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:37,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462756462] [2023-04-02 05:57:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462756462] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:37,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629750657] [2023-04-02 05:57:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:37,109 INFO L87 Difference]: Start difference. First operand 1283 states and 2172 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 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 05:57:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:40,274 INFO L93 Difference]: Finished difference Result 2711 states and 4498 transitions. [2023-04-02 05:57:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 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 215 [2023-04-02 05:57:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:40,282 INFO L225 Difference]: With dead ends: 2711 [2023-04-02 05:57:40,282 INFO L226 Difference]: Without dead ends: 1975 [2023-04-02 05:57:40,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:40,289 INFO L413 NwaCegarLoop]: 1290 mSDtfsCounter, 292 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:40,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 2530 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:57:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2023-04-02 05:57:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1969. [2023-04-02 05:57:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.6676844783715012) internal successors, (3277), 1965 states have internal predecessors, (3277), 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 05:57:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3280 transitions. [2023-04-02 05:57:40,368 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3280 transitions. Word has length 215 [2023-04-02 05:57:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:40,369 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 3280 transitions. [2023-04-02 05:57:40,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 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 05:57:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3280 transitions. [2023-04-02 05:57:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-02 05:57:40,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:40,372 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] [2023-04-02 05:57:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 05:57:40,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:40,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1587053823, now seen corresponding path program 1 times [2023-04-02 05:57:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:40,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716654898] [2023-04-02 05:57:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:41,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:41,053 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 05:57:41,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:41,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716654898] [2023-04-02 05:57:41,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716654898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:41,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:41,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:41,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236658463] [2023-04-02 05:57:41,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:41,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:41,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:41,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:41,055 INFO L87 Difference]: Start difference. First operand 1969 states and 3280 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 05:57:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:44,130 INFO L93 Difference]: Finished difference Result 4725 states and 7738 transitions. [2023-04-02 05:57:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 219 [2023-04-02 05:57:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:44,142 INFO L225 Difference]: With dead ends: 4725 [2023-04-02 05:57:44,142 INFO L226 Difference]: Without dead ends: 3303 [2023-04-02 05:57:44,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:44,147 INFO L413 NwaCegarLoop]: 1290 mSDtfsCounter, 285 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:44,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2531 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:57:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2023-04-02 05:57:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 3293. [2023-04-02 05:57:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3289 states have (on average 1.6409242930982062) internal successors, (5397), 3289 states have internal predecessors, (5397), 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 05:57:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 5400 transitions. [2023-04-02 05:57:44,287 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 5400 transitions. Word has length 219 [2023-04-02 05:57:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:44,288 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 5400 transitions. [2023-04-02 05:57:44,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 05:57:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 5400 transitions. [2023-04-02 05:57:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-02 05:57:44,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:44,291 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] [2023-04-02 05:57:44,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 05:57:44,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:44,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1417406402, now seen corresponding path program 1 times [2023-04-02 05:57:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739216846] [2023-04-02 05:57:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:45,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:45,044 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 05:57:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:45,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739216846] [2023-04-02 05:57:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739216846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:45,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:45,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055843821] [2023-04-02 05:57:45,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:45,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:45,054 INFO L87 Difference]: Start difference. First operand 3293 states and 5400 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 05:57:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:48,158 INFO L93 Difference]: Finished difference Result 8609 states and 13930 transitions. [2023-04-02 05:57:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:57:48,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 223 [2023-04-02 05:57:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:48,176 INFO L225 Difference]: With dead ends: 8609 [2023-04-02 05:57:48,176 INFO L226 Difference]: Without dead ends: 5863 [2023-04-02 05:57:48,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:48,183 INFO L413 NwaCegarLoop]: 1290 mSDtfsCounter, 278 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:48,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 2532 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 05:57:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2023-04-02 05:57:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5845. [2023-04-02 05:57:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5841 states have (on average 1.6170176339667865) internal successors, (9445), 5841 states have internal predecessors, (9445), 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 05:57:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 9448 transitions. [2023-04-02 05:57:48,429 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 9448 transitions. Word has length 223 [2023-04-02 05:57:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:48,430 INFO L495 AbstractCegarLoop]: Abstraction has 5845 states and 9448 transitions. [2023-04-02 05:57:48,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 05:57:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 9448 transitions. [2023-04-02 05:57:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-04-02 05:57:48,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:48,434 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] [2023-04-02 05:57:48,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 05:57:48,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:48,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1954415199, now seen corresponding path program 1 times [2023-04-02 05:57:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:48,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807686449] [2023-04-02 05:57:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:49,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:49,177 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 05:57:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807686449] [2023-04-02 05:57:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807686449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:49,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:49,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 05:57:49,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468598129] [2023-04-02 05:57:49,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:49,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 05:57:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 05:57:49,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 05:57:49,179 INFO L87 Difference]: Start difference. First operand 5845 states and 9448 transitions. Second operand has 8 states, 8 states have (on average 28.0) internal successors, (224), 7 states have internal predecessors, (224), 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 05:57:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:57:53,876 INFO L93 Difference]: Finished difference Result 35745 states and 57762 transitions. [2023-04-02 05:57:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 05:57:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.0) internal successors, (224), 7 states have internal predecessors, (224), 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 227 [2023-04-02 05:57:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:57:53,975 INFO L225 Difference]: With dead ends: 35745 [2023-04-02 05:57:53,975 INFO L226 Difference]: Without dead ends: 30391 [2023-04-02 05:57:53,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-04-02 05:57:53,994 INFO L413 NwaCegarLoop]: 1296 mSDtfsCounter, 3520 mSDsluCounter, 10744 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 12040 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 05:57:53,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3520 Valid, 12040 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 05:57:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30391 states. [2023-04-02 05:57:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30391 to 10824. [2023-04-02 05:57:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10824 states, 10820 states have (on average 1.6166358595194086) internal successors, (17492), 10820 states have internal predecessors, (17492), 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 05:57:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10824 states to 10824 states and 17495 transitions. [2023-04-02 05:57:55,097 INFO L78 Accepts]: Start accepts. Automaton has 10824 states and 17495 transitions. Word has length 227 [2023-04-02 05:57:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:55,098 INFO L495 AbstractCegarLoop]: Abstraction has 10824 states and 17495 transitions. [2023-04-02 05:57:55,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.0) internal successors, (224), 7 states have internal predecessors, (224), 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 05:57:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 10824 states and 17495 transitions. [2023-04-02 05:57:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-02 05:57:55,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:55,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:55,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 05:57:55,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:55,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:55,104 INFO L85 PathProgramCache]: Analyzing trace with hash 386603028, now seen corresponding path program 1 times [2023-04-02 05:57:55,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:55,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079912808] [2023-04-02 05:57:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:55,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:55,767 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 05:57:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079912808] [2023-04-02 05:57:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079912808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:55,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 05:57:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498906982] [2023-04-02 05:57:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:55,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 05:57:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 05:57:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:57:55,769 INFO L87 Difference]: Start difference. First operand 10824 states and 17495 transitions. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 4 states have internal predecessors, (225), 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 05:58:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:00,431 INFO L93 Difference]: Finished difference Result 31755 states and 51293 transitions. [2023-04-02 05:58:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 05:58:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 4 states have internal predecessors, (225), 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 228 [2023-04-02 05:58:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:00,473 INFO L225 Difference]: With dead ends: 31755 [2023-04-02 05:58:00,474 INFO L226 Difference]: Without dead ends: 21478 [2023-04-02 05:58:00,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:58:00,495 INFO L413 NwaCegarLoop]: 1293 mSDtfsCounter, 952 mSDsluCounter, 2856 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 4149 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:00,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 4149 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:58:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2023-04-02 05:58:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 16103. [2023-04-02 05:58:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16103 states, 16099 states have (on average 1.6141996397291758) internal successors, (25987), 16099 states have internal predecessors, (25987), 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 05:58:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16103 states to 16103 states and 25990 transitions. [2023-04-02 05:58:01,826 INFO L78 Accepts]: Start accepts. Automaton has 16103 states and 25990 transitions. Word has length 228 [2023-04-02 05:58:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:01,826 INFO L495 AbstractCegarLoop]: Abstraction has 16103 states and 25990 transitions. [2023-04-02 05:58:01,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 4 states have internal predecessors, (225), 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 05:58:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 16103 states and 25990 transitions. [2023-04-02 05:58:01,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-02 05:58:01,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:01,835 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] [2023-04-02 05:58:01,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 05:58:01,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:01,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash 502870815, now seen corresponding path program 1 times [2023-04-02 05:58:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722772349] [2023-04-02 05:58:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:02,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:02,409 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 05:58:02,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722772349] [2023-04-02 05:58:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722772349] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:02,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:02,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:58:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719839569] [2023-04-02 05:58:02,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:02,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:58:02,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:58:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:58:02,411 INFO L87 Difference]: Start difference. First operand 16103 states and 25990 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:07,513 INFO L93 Difference]: Finished difference Result 30873 states and 49825 transitions. [2023-04-02 05:58:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:58:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 230 [2023-04-02 05:58:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:07,553 INFO L225 Difference]: With dead ends: 30873 [2023-04-02 05:58:07,553 INFO L226 Difference]: Without dead ends: 22667 [2023-04-02 05:58:07,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:58:07,568 INFO L413 NwaCegarLoop]: 1500 mSDtfsCounter, 298 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:07,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2748 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 05:58:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2023-04-02 05:58:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 22665. [2023-04-02 05:58:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22665 states, 22661 states have (on average 1.609284674109704) internal successors, (36468), 22661 states have internal predecessors, (36468), 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 05:58:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22665 states to 22665 states and 36471 transitions. [2023-04-02 05:58:09,478 INFO L78 Accepts]: Start accepts. Automaton has 22665 states and 36471 transitions. Word has length 230 [2023-04-02 05:58:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:09,478 INFO L495 AbstractCegarLoop]: Abstraction has 22665 states and 36471 transitions. [2023-04-02 05:58:09,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 22665 states and 36471 transitions. [2023-04-02 05:58:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-02 05:58:09,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:09,483 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] [2023-04-02 05:58:09,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 05:58:09,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:09,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1306725812, now seen corresponding path program 1 times [2023-04-02 05:58:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467252524] [2023-04-02 05:58:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:10,061 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 05:58:10,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467252524] [2023-04-02 05:58:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467252524] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:10,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:10,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:58:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116507728] [2023-04-02 05:58:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:58:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:58:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:58:10,062 INFO L87 Difference]: Start difference. First operand 22665 states and 36471 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:15,866 INFO L93 Difference]: Finished difference Result 43453 states and 69957 transitions. [2023-04-02 05:58:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:58:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 230 [2023-04-02 05:58:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:15,930 INFO L225 Difference]: With dead ends: 43453 [2023-04-02 05:58:15,930 INFO L226 Difference]: Without dead ends: 31843 [2023-04-02 05:58:15,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:58:15,955 INFO L413 NwaCegarLoop]: 1465 mSDtfsCounter, 291 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:15,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 2714 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 05:58:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31843 states. [2023-04-02 05:58:18,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31843 to 31841. [2023-04-02 05:58:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31841 states, 31837 states have (on average 1.6044225272481705) internal successors, (51080), 31837 states have internal predecessors, (51080), 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 05:58:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31841 states to 31841 states and 51083 transitions. [2023-04-02 05:58:18,807 INFO L78 Accepts]: Start accepts. Automaton has 31841 states and 51083 transitions. Word has length 230 [2023-04-02 05:58:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:18,808 INFO L495 AbstractCegarLoop]: Abstraction has 31841 states and 51083 transitions. [2023-04-02 05:58:18,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 31841 states and 51083 transitions. [2023-04-02 05:58:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-02 05:58:18,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:18,811 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] [2023-04-02 05:58:18,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 05:58:18,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:18,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1878198935, now seen corresponding path program 1 times [2023-04-02 05:58:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121111947] [2023-04-02 05:58:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:19,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:19,392 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 05:58:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121111947] [2023-04-02 05:58:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121111947] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:19,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:19,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:58:19,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797576702] [2023-04-02 05:58:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:58:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:19,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:58:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:58:19,394 INFO L87 Difference]: Start difference. First operand 31841 states and 51083 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:26,563 INFO L93 Difference]: Finished difference Result 60885 states and 97781 transitions. [2023-04-02 05:58:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:58:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 230 [2023-04-02 05:58:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:26,639 INFO L225 Difference]: With dead ends: 60885 [2023-04-02 05:58:26,639 INFO L226 Difference]: Without dead ends: 44517 [2023-04-02 05:58:26,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:58:26,668 INFO L413 NwaCegarLoop]: 1430 mSDtfsCounter, 284 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:26,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 2680 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 05:58:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44517 states. [2023-04-02 05:58:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44517 to 44515. [2023-04-02 05:58:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44515 states, 44511 states have (on average 1.5996045921232953) internal successors, (71200), 44511 states have internal predecessors, (71200), 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 05:58:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44515 states to 44515 states and 71203 transitions. [2023-04-02 05:58:30,991 INFO L78 Accepts]: Start accepts. Automaton has 44515 states and 71203 transitions. Word has length 230 [2023-04-02 05:58:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:30,992 INFO L495 AbstractCegarLoop]: Abstraction has 44515 states and 71203 transitions. [2023-04-02 05:58:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 44515 states and 71203 transitions. [2023-04-02 05:58:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-02 05:58:30,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:30,996 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] [2023-04-02 05:58:30,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 05:58:30,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:30,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 511997418, now seen corresponding path program 1 times [2023-04-02 05:58:30,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:30,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442199332] [2023-04-02 05:58:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:31,534 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 05:58:31,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:31,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442199332] [2023-04-02 05:58:31,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442199332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:31,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:31,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:58:31,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433440083] [2023-04-02 05:58:31,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:31,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:58:31,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:31,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:58:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:58:31,536 INFO L87 Difference]: Start difference. First operand 44515 states and 71203 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:58:40,581 INFO L93 Difference]: Finished difference Result 84899 states and 135991 transitions. [2023-04-02 05:58:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:58:40,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 230 [2023-04-02 05:58:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:58:40,703 INFO L225 Difference]: With dead ends: 84899 [2023-04-02 05:58:40,704 INFO L226 Difference]: Without dead ends: 61916 [2023-04-02 05:58:40,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:58:40,739 INFO L413 NwaCegarLoop]: 1395 mSDtfsCounter, 277 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:58:40,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 2646 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 05:58:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61916 states. [2023-04-02 05:58:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61916 to 61914. [2023-04-02 05:58:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61914 states, 61910 states have (on average 1.594540461960911) internal successors, (98718), 61910 states have internal predecessors, (98718), 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 05:58:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61914 states to 61914 states and 98721 transitions. [2023-04-02 05:58:46,941 INFO L78 Accepts]: Start accepts. Automaton has 61914 states and 98721 transitions. Word has length 230 [2023-04-02 05:58:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:58:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 61914 states and 98721 transitions. [2023-04-02 05:58:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:58:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 61914 states and 98721 transitions. [2023-04-02 05:58:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-02 05:58:46,944 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:58:46,944 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] [2023-04-02 05:58:46,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 05:58:46,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:58:46,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:58:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1827467902, now seen corresponding path program 1 times [2023-04-02 05:58:46,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:58:46,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754942744] [2023-04-02 05:58:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:58:46,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:58:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:58:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:58:47,482 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 05:58:47,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:58:47,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754942744] [2023-04-02 05:58:47,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754942744] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:58:47,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:58:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:58:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992818220] [2023-04-02 05:58:47,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:58:47,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:58:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:58:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:58:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:58:47,484 INFO L87 Difference]: Start difference. First operand 61914 states and 98721 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:59:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:59:00,290 INFO L93 Difference]: Finished difference Result 135910 states and 216586 transitions. [2023-04-02 05:59:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:59:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 230 [2023-04-02 05:59:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:59:00,461 INFO L225 Difference]: With dead ends: 135910 [2023-04-02 05:59:00,461 INFO L226 Difference]: Without dead ends: 93115 [2023-04-02 05:59:00,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:59:00,520 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 305 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 05:59:00,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 2801 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 05:59:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93115 states. [2023-04-02 05:59:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93115 to 93113. [2023-04-02 05:59:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93113 states, 93109 states have (on average 1.5853999076351373) internal successors, (147615), 93109 states have internal predecessors, (147615), 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 05:59:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93113 states to 93113 states and 147618 transitions. [2023-04-02 05:59:10,206 INFO L78 Accepts]: Start accepts. Automaton has 93113 states and 147618 transitions. Word has length 230 [2023-04-02 05:59:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:59:10,207 INFO L495 AbstractCegarLoop]: Abstraction has 93113 states and 147618 transitions. [2023-04-02 05:59:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 05:59:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 93113 states and 147618 transitions. [2023-04-02 05:59:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-04-02 05:59:10,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:59:10,209 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] [2023-04-02 05:59:10,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 05:59:10,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:59:10,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:59:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1720354863, now seen corresponding path program 1 times [2023-04-02 05:59:10,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:59:10,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698906320] [2023-04-02 05:59:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:59:10,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:59:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:59:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:59:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:59:11,539 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 05:59:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:59:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698906320] [2023-04-02 05:59:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698906320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:59:11,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:59:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 05:59:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364703434] [2023-04-02 05:59:11,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:59:11,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 05:59:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:59:11,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 05:59:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:59:11,541 INFO L87 Difference]: Start difference. First operand 93113 states and 147618 transitions. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 5 states have internal predecessors, (235), 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 05:59:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:59:29,952 INFO L93 Difference]: Finished difference Result 154392 states and 243677 transitions. [2023-04-02 05:59:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 05:59:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 5 states have internal predecessors, (235), 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 238 [2023-04-02 05:59:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:59:30,268 INFO L225 Difference]: With dead ends: 154392 [2023-04-02 05:59:30,269 INFO L226 Difference]: Without dead ends: 154390 [2023-04-02 05:59:30,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:59:30,311 INFO L413 NwaCegarLoop]: 1489 mSDtfsCounter, 632 mSDsluCounter, 4077 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 05:59:30,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 5566 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 05:59:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154390 states. [2023-04-02 05:59:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154390 to 94081. [2023-04-02 05:59:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94081 states, 94077 states have (on average 1.5767934776831745) internal successors, (148340), 94077 states have internal predecessors, (148340), 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 05:59:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94081 states to 94081 states and 148343 transitions. [2023-04-02 05:59:42,006 INFO L78 Accepts]: Start accepts. Automaton has 94081 states and 148343 transitions. Word has length 238 [2023-04-02 05:59:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:59:42,006 INFO L495 AbstractCegarLoop]: Abstraction has 94081 states and 148343 transitions. [2023-04-02 05:59:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 5 states have internal predecessors, (235), 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 05:59:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 94081 states and 148343 transitions. [2023-04-02 05:59:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-02 05:59:42,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:59:42,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 05:59:42,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:59:42,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:59:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash 549944494, now seen corresponding path program 1 times [2023-04-02 05:59:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:59:42,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527282724] [2023-04-02 05:59:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:59:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:59:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:59:42,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:59:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:59:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 05:59:42,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:59:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527282724] [2023-04-02 05:59:42,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527282724] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:59:42,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:59:42,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 05:59:42,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874237381] [2023-04-02 05:59:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:59:42,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 05:59:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:59:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 05:59:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 05:59:42,732 INFO L87 Difference]: Start difference. First operand 94081 states and 148343 transitions. Second operand has 8 states, 8 states have (on average 33.75) internal successors, (270), 7 states have internal predecessors, (270), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:00:32,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:00:32,094 INFO L93 Difference]: Finished difference Result 389211 states and 615230 transitions. [2023-04-02 06:00:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:00:32,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 33.75) internal successors, (270), 7 states have internal predecessors, (270), 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 280 [2023-04-02 06:00:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:00:33,206 INFO L225 Difference]: With dead ends: 389211 [2023-04-02 06:00:33,206 INFO L226 Difference]: Without dead ends: 327649 [2023-04-02 06:00:33,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:00:33,360 INFO L413 NwaCegarLoop]: 1633 mSDtfsCounter, 2579 mSDsluCounter, 7621 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 9254 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:00:33,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 9254 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 06:00:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327649 states. [2023-04-02 06:01:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327649 to 163962. [2023-04-02 06:01:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163962 states, 163958 states have (on average 1.5745373815245367) internal successors, (258158), 163958 states have internal predecessors, (258158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:01:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163962 states to 163962 states and 258161 transitions. [2023-04-02 06:01:01,024 INFO L78 Accepts]: Start accepts. Automaton has 163962 states and 258161 transitions. Word has length 280 [2023-04-02 06:01:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:01:01,025 INFO L495 AbstractCegarLoop]: Abstraction has 163962 states and 258161 transitions. [2023-04-02 06:01:01,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.75) internal successors, (270), 7 states have internal predecessors, (270), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:01:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 163962 states and 258161 transitions. [2023-04-02 06:01:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-02 06:01:01,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:01:01,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:01:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:01:01,033 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:01:01,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:01:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1353799491, now seen corresponding path program 1 times [2023-04-02 06:01:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:01:01,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880825503] [2023-04-02 06:01:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:01:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:01:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:02,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:01:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 06:01:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:01:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880825503] [2023-04-02 06:01:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880825503] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:01:02,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:01:02,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:01:02,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032897152] [2023-04-02 06:01:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:01:02,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:01:02,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:01:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:01:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:01:02,090 INFO L87 Difference]: Start difference. First operand 163962 states and 258161 transitions. Second operand has 8 states, 8 states have (on average 32.875) internal successors, (263), 7 states have internal predecessors, (263), 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)