./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/avg20-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/avg20-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 10:09:53,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 10:09:53,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 10:09:53,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 10:09:53,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 10:09:53,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 10:09:53,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 10:09:53,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 10:09:53,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 10:09:53,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 10:09:53,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 10:09:53,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 10:09:53,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 10:09:53,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 10:09:53,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 10:09:53,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 10:09:53,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 10:09:53,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 10:09:53,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 10:09:53,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 10:09:53,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 10:09:53,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 10:09:53,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 10:09:53,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 10:09:53,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 10:09:53,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 10:09:53,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 10:09:53,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 10:09:53,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 10:09:53,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 10:09:53,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 10:09:53,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 10:09:53,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 10:09:53,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 10:09:54,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 10:09:54,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 10:09:54,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 10:09:54,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 10:09:54,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 10:09:54,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 10:09:54,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 10:09:54,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 10:09:54,023 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 10:09:54,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 10:09:54,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 10:09:54,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 10:09:54,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 10:09:54,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 10:09:54,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 10:09:54,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 10:09:54,026 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 10:09:54,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 10:09:54,026 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 10:09:54,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 10:09:54,027 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 10:09:54,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 10:09:54,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 10:09:54,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 10:09:54,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 10:09:54,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:09:54,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 10:09:54,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 10:09:54,029 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 10:09:54,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 [2023-02-18 10:09:54,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 10:09:54,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 10:09:54,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 10:09:54,252 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 10:09:54,253 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 10:09:54,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg20-2.i [2023-02-18 10:09:55,243 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 10:09:55,398 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 10:09:55,398 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i [2023-02-18 10:09:55,402 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d0c11f28/7c405b1281414702bf4d7b538ac134fb/FLAG4bc68466c [2023-02-18 10:09:55,416 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d0c11f28/7c405b1281414702bf4d7b538ac134fb [2023-02-18 10:09:55,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 10:09:55,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 10:09:55,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 10:09:55,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 10:09:55,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 10:09:55,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a31d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55, skipping insertion in model container [2023-02-18 10:09:55,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 10:09:55,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 10:09:55,544 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2023-02-18 10:09:55,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:09:55,554 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 10:09:55,570 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2023-02-18 10:09:55,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:09:55,582 INFO L208 MainTranslator]: Completed translation [2023-02-18 10:09:55,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55 WrapperNode [2023-02-18 10:09:55,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 10:09:55,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 10:09:55,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 10:09:55,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 10:09:55,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,604 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-18 10:09:55,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 10:09:55,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 10:09:55,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 10:09:55,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 10:09:55,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 10:09:55,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 10:09:55,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 10:09:55,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 10:09:55,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (1/1) ... [2023-02-18 10:09:55,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:09:55,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:55,694 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) [2023-02-18 10:09:55,700 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 [2023-02-18 10:09:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 10:09:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 10:09:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 10:09:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 10:09:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-02-18 10:09:55,721 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-02-18 10:09:55,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 10:09:55,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 10:09:55,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 10:09:55,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 10:09:55,776 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 10:09:55,778 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 10:09:55,919 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 10:09:55,923 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 10:09:55,923 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 10:09:55,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:09:55 BoogieIcfgContainer [2023-02-18 10:09:55,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 10:09:55,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 10:09:55,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 10:09:55,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 10:09:55,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:09:55" (1/3) ... [2023-02-18 10:09:55,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70761864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:09:55, skipping insertion in model container [2023-02-18 10:09:55,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:09:55" (2/3) ... [2023-02-18 10:09:55,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70761864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:09:55, skipping insertion in model container [2023-02-18 10:09:55,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:09:55" (3/3) ... [2023-02-18 10:09:55,930 INFO L112 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2023-02-18 10:09:55,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 10:09:55,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 10:09:55,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 10:09:55,988 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;@666b72f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 10:09:55,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 10:09:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 10:09:55,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:55,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:56,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2023-02-18 10:09:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986645234] [2023-02-18 10:09:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 10:09:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 10:09:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-18 10:09:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 10:09:56,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986645234] [2023-02-18 10:09:56,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986645234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538943217] [2023-02-18 10:09:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:56,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:56,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:56,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:56,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 10:09:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:09:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:09:56,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:09:56,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538943217] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:56,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:09:56,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 10:09:56,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472527376] [2023-02-18 10:09:56,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:56,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:09:56,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:56,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:09:56,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:09:56,387 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 10:09:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:56,411 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-02-18 10:09:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:09:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-18 10:09:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:56,418 INFO L225 Difference]: With dead ends: 50 [2023-02-18 10:09:56,418 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 10:09:56,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:09:56,423 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:56,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 10:09:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-02-18 10:09:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-18 10:09:56,446 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-18 10:09:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:56,446 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-18 10:09:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 10:09:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-18 10:09:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 10:09:56,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:56,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:56,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 10:09:56,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2023-02-18 10:09:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:56,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603132590] [2023-02-18 10:09:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:56,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:09:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 10:09:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-18 10:09:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 10:09:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603132590] [2023-02-18 10:09:56,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603132590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146290284] [2023-02-18 10:09:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:56,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:56,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:56,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 10:09:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:56,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:09:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 10:09:56,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:09:56,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146290284] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:56,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:09:56,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 10:09:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143835295] [2023-02-18 10:09:56,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:09:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:09:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:09:56,879 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:09:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:56,888 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-18 10:09:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:09:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-18 10:09:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:56,889 INFO L225 Difference]: With dead ends: 42 [2023-02-18 10:09:56,889 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 10:09:56,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 10:09:56,891 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:56,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 10:09:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-18 10:09:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-18 10:09:56,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-02-18 10:09:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:56,895 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-18 10:09:56,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:09:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-18 10:09:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 10:09:56,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:56,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:56,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 10:09:57,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 10:09:57,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2023-02-18 10:09:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:57,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968155655] [2023-02-18 10:09:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:09:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 10:09:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 10:09:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 10:09:57,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968155655] [2023-02-18 10:09:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968155655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673783504] [2023-02-18 10:09:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:57,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:57,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 10:09:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:09:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 10:09:57,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:09:57,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673783504] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:09:57,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:09:57,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-18 10:09:57,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070150592] [2023-02-18 10:09:57,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:09:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:09:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:09:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:09:57,309 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:09:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:57,317 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-18 10:09:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:09:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-02-18 10:09:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:57,318 INFO L225 Difference]: With dead ends: 39 [2023-02-18 10:09:57,318 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 10:09:57,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:09:57,319 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:57,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 10:09:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-18 10:09:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-18 10:09:57,324 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2023-02-18 10:09:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:57,325 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-18 10:09:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 10:09:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-18 10:09:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 10:09:57,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:57,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:57,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:57,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2023-02-18 10:09:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:57,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623508525] [2023-02-18 10:09:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 10:09:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 10:09:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 10:09:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 10:09:57,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:57,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623508525] [2023-02-18 10:09:57,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623508525] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:57,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559614239] [2023-02-18 10:09:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:57,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:57,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:57,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 10:09:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 10:09:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 10:09:57,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 10:09:57,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559614239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:57,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:57,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-18 10:09:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557455545] [2023-02-18 10:09:57,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:57,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 10:09:57,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 10:09:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 10:09:57,699 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:09:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:57,734 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-18 10:09:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 10:09:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2023-02-18 10:09:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:57,736 INFO L225 Difference]: With dead ends: 54 [2023-02-18 10:09:57,737 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 10:09:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 10:09:57,738 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:57,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 10:09:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-02-18 10:09:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-18 10:09:57,741 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2023-02-18 10:09:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:57,742 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-18 10:09:57,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:09:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-18 10:09:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 10:09:57,743 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:57,743 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:57,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:57,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2023-02-18 10:09:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:57,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422820119] [2023-02-18 10:09:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 10:09:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-18 10:09:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-18 10:09:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 10:09:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422820119] [2023-02-18 10:09:58,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422820119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835749053] [2023-02-18 10:09:58,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:09:58,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:58,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:58,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:58,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 10:09:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:09:58,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:09:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 10:09:58,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 10:09:58,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 10:09:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835749053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:58,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-18 10:09:58,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029449622] [2023-02-18 10:09:58,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:58,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 10:09:58,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:58,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 10:09:58,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 10:09:58,214 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 10:09:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:58,254 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-02-18 10:09:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 10:09:58,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-02-18 10:09:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:58,257 INFO L225 Difference]: With dead ends: 70 [2023-02-18 10:09:58,257 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 10:09:58,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 10:09:58,259 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:58,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 10:09:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-18 10:09:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-18 10:09:58,278 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2023-02-18 10:09:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:58,278 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-18 10:09:58,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 10:09:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-18 10:09:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 10:09:58,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:58,283 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:58,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:58,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:58,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:58,489 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2023-02-18 10:09:58,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:58,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579769807] [2023-02-18 10:09:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:58,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 10:09:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-18 10:09:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-18 10:09:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 10:09:58,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579769807] [2023-02-18 10:09:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579769807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012109470] [2023-02-18 10:09:58,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:09:58,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:58,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:58,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 10:09:58,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 10:09:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:09:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:09:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-18 10:09:58,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-18 10:09:58,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012109470] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:58,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:58,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-18 10:09:58,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383535208] [2023-02-18 10:09:58,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:58,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 10:09:58,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 10:09:58,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:09:58,813 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:09:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:58,851 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2023-02-18 10:09:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 10:09:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-02-18 10:09:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:58,852 INFO L225 Difference]: With dead ends: 82 [2023-02-18 10:09:58,853 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 10:09:58,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 10:09:58,853 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:58,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 10:09:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-18 10:09:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-02-18 10:09:58,857 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2023-02-18 10:09:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:58,858 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-02-18 10:09:58,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:09:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-02-18 10:09:58,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 10:09:58,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:58,859 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:58,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:59,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:59,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:59,066 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2023-02-18 10:09:59,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:59,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370495964] [2023-02-18 10:09:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 10:09:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 10:09:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-18 10:09:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-18 10:09:59,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370495964] [2023-02-18 10:09:59,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370495964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050965583] [2023-02-18 10:09:59,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:09:59,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:59,234 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:59,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 10:09:59,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:09:59,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:09:59,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 10:09:59,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:09:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-02-18 10:09:59,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:09:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-18 10:09:59,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050965583] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:09:59,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:09:59,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-02-18 10:09:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932300547] [2023-02-18 10:09:59,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:09:59,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 10:09:59,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:09:59,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 10:09:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-18 10:09:59,382 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:09:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:09:59,424 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-18 10:09:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 10:09:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2023-02-18 10:09:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:09:59,426 INFO L225 Difference]: With dead ends: 100 [2023-02-18 10:09:59,426 INFO L226 Difference]: Without dead ends: 68 [2023-02-18 10:09:59,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-18 10:09:59,427 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:09:59,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:09:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-18 10:09:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-02-18 10:09:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:09:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-02-18 10:09:59,431 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2023-02-18 10:09:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:09:59,431 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-02-18 10:09:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:09:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-02-18 10:09:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 10:09:59,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:09:59,432 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:09:59,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 10:09:59,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:59,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:09:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:09:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2023-02-18 10:09:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:09:59,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039843485] [2023-02-18 10:09:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:09:59,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:09:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 10:09:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 10:09:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-18 10:09:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:09:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-02-18 10:09:59,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:09:59,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039843485] [2023-02-18 10:09:59,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039843485] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:09:59,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558445340] [2023-02-18 10:09:59,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 10:09:59,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:09:59,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:09:59,893 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:09:59,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 10:10:00,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-18 10:10:00,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 10:10:00,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-02-18 10:10:00,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-18 10:10:00,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558445340] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:00,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:00,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-02-18 10:10:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118031750] [2023-02-18 10:10:00,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:00,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 10:10:00,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 10:10:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-18 10:10:00,918 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:10:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:00,979 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2023-02-18 10:10:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 10:10:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2023-02-18 10:10:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:00,980 INFO L225 Difference]: With dead ends: 126 [2023-02-18 10:10:00,980 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 10:10:00,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-18 10:10:00,981 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:00,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:10:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 10:10:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2023-02-18 10:10:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:10:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-02-18 10:10:00,985 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2023-02-18 10:10:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:00,986 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-02-18 10:10:00,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:10:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-02-18 10:10:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 10:10:00,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:00,987 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:00,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:01,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 10:10:01,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2023-02-18 10:10:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518809547] [2023-02-18 10:10:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:01,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-18 10:10:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-02-18 10:10:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-02-18 10:10:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-02-18 10:10:01,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518809547] [2023-02-18 10:10:01,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518809547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543997356] [2023-02-18 10:10:01,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 10:10:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:01,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:01,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 10:10:02,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-18 10:10:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 10:10:02,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2023-02-18 10:10:02,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2023-02-18 10:10:02,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543997356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:02,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:02,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-02-18 10:10:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105492562] [2023-02-18 10:10:02,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 10:10:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 10:10:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-18 10:10:02,207 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:10:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:02,292 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2023-02-18 10:10:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 10:10:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2023-02-18 10:10:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:02,294 INFO L225 Difference]: With dead ends: 160 [2023-02-18 10:10:02,294 INFO L226 Difference]: Without dead ends: 104 [2023-02-18 10:10:02,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-18 10:10:02,297 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:02,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:10:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-18 10:10:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-02-18 10:10:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:10:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2023-02-18 10:10:02,313 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2023-02-18 10:10:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:02,313 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2023-02-18 10:10:02,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 10:10:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2023-02-18 10:10:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-18 10:10:02,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:02,316 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:02,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:02,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:02,522 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:02,523 INFO L85 PathProgramCache]: Analyzing trace with hash -794036833, now seen corresponding path program 7 times [2023-02-18 10:10:02,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:02,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990620253] [2023-02-18 10:10:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:02,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:02,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-18 10:10:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:02,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-18 10:10:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:02,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-02-18 10:10:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:10:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:02,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990620253] [2023-02-18 10:10:02,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990620253] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596366960] [2023-02-18 10:10:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 10:10:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:02,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:02,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 10:10:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:02,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 10:10:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:10:03,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-18 10:10:03,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596366960] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:03,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:03,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-02-18 10:10:03,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896969452] [2023-02-18 10:10:03,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:03,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 10:10:03,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 10:10:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-18 10:10:03,172 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:10:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:03,211 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2023-02-18 10:10:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 10:10:03,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2023-02-18 10:10:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:03,212 INFO L225 Difference]: With dead ends: 187 [2023-02-18 10:10:03,212 INFO L226 Difference]: Without dead ends: 115 [2023-02-18 10:10:03,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 312 SyntacticMatches, 24 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-02-18 10:10:03,213 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:03,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:10:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-18 10:10:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-18 10:10:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:10:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2023-02-18 10:10:03,216 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 168 [2023-02-18 10:10:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:03,217 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2023-02-18 10:10:03,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 10:10:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2023-02-18 10:10:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-18 10:10:03,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:03,218 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:03,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 10:10:03,418 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash -784239573, now seen corresponding path program 8 times [2023-02-18 10:10:03,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:03,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731713666] [2023-02-18 10:10:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:03,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:03,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:10:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:03,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-18 10:10:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-02-18 10:10:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2023-02-18 10:10:03,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731713666] [2023-02-18 10:10:03,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731713666] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832046385] [2023-02-18 10:10:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:10:03,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:03,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:03,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 10:10:03,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:10:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 10:10:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2023-02-18 10:10:04,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2023-02-18 10:10:04,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832046385] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:04,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:04,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-18 10:10:04,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98415489] [2023-02-18 10:10:04,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:04,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 10:10:04,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 10:10:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:10:04,189 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 10:10:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:04,224 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2023-02-18 10:10:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 10:10:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2023-02-18 10:10:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:04,225 INFO L225 Difference]: With dead ends: 198 [2023-02-18 10:10:04,225 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 10:10:04,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 337 SyntacticMatches, 24 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:10:04,226 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:04,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 90 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:10:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 10:10:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-18 10:10:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:10:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-02-18 10:10:04,230 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 180 [2023-02-18 10:10:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:04,230 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-02-18 10:10:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 10:10:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-02-18 10:10:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-18 10:10:04,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:04,231 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:04,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:04,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 10:10:04,437 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1743923041, now seen corresponding path program 9 times [2023-02-18 10:10:04,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:04,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508235217] [2023-02-18 10:10:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:10:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:04,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-02-18 10:10:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:04,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-02-18 10:10:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-02-18 10:10:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:04,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508235217] [2023-02-18 10:10:04,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508235217] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571078913] [2023-02-18 10:10:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:10:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:04,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:04,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 10:10:07,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-02-18 10:10:07,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:07,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 10:10:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 1690 proven. 196 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2023-02-18 10:10:07,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-02-18 10:10:07,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571078913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:07,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:07,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-02-18 10:10:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536981184] [2023-02-18 10:10:07,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 10:10:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 10:10:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:10:07,517 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:10:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:07,552 INFO L93 Difference]: Finished difference Result 188 states and 197 transitions. [2023-02-18 10:10:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 10:10:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2023-02-18 10:10:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:07,556 INFO L225 Difference]: With dead ends: 188 [2023-02-18 10:10:07,557 INFO L226 Difference]: Without dead ends: 137 [2023-02-18 10:10:07,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 408 SyntacticMatches, 25 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-18 10:10:07,557 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:07,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 108 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:10:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-18 10:10:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-02-18 10:10:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 10:10:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2023-02-18 10:10:07,561 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 216 [2023-02-18 10:10:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:07,562 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2023-02-18 10:10:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 10:10:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2023-02-18 10:10:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-02-18 10:10:07,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:07,564 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:07,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:07,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 10:10:07,773 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1352255541, now seen corresponding path program 10 times [2023-02-18 10:10:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:07,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999136114] [2023-02-18 10:10:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:07,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:12:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 10:12:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:13:09,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-02-18 10:13:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:14:14,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-02-18 10:14:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:14:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 12 proven. 4413 refuted. 4 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 10:14:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:14:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999136114] [2023-02-18 10:14:51,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999136114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:14:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630181247] [2023-02-18 10:14:51,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:14:51,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:14:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:14:51,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:14:51,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 10:14:52,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:14:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:14:52,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 422 conjunts are in the unsatisfiable core [2023-02-18 10:14:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:14:52,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-18 10:17:01,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 10:17:01,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 10:17:01,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 261 select indices, 261 select index equivalence classes, 191 disjoint index pairs (out of 33930 index pairs), introduced 261 new quantified variables, introduced 34170 case distinctions, treesize of input 189085 treesize of output 1049205