./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 21:38:07,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 21:38:07,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 21:38:07,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 21:38:07,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 21:38:07,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 21:38:07,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 21:38:07,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 21:38:07,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 21:38:07,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 21:38:07,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 21:38:07,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 21:38:07,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 21:38:07,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 21:38:07,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 21:38:07,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 21:38:07,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 21:38:07,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 21:38:07,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 21:38:07,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 21:38:07,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 21:38:07,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 21:38:07,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 21:38:07,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 21:38:07,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 21:38:07,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 21:38:07,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 21:38:07,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 21:38:07,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 21:38:07,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 21:38:07,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 21:38:07,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 21:38:07,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 21:38:07,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 21:38:07,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 21:38:07,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 21:38:07,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 21:38:07,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 21:38:07,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 21:38:07,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 21:38:07,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 21:38:07,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 21:38:07,578 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 21:38:07,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 21:38:07,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 21:38:07,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 21:38:07,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 21:38:07,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 21:38:07,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 21:38:07,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 21:38:07,583 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 21:38:07,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 21:38:07,584 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 21:38:07,584 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 21:38:07,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 21:38:07,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 21:38:07,585 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 21:38:07,586 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 21:38:07,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 21:38:07,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 21:38:07,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 21:38:07,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 21:38:07,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 21:38:07,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 21:38:07,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 21:38:07,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 21:38:07,587 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 21:38:07,587 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 21:38:07,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 21:38:07,587 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 21:38:07,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e [2023-02-18 21:38:07,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 21:38:07,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 21:38:07,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 21:38:07,803 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 21:38:07,804 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 21:38:07,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2023-02-18 21:38:08,848 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 21:38:09,018 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 21:38:09,019 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2023-02-18 21:38:09,030 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d63d31a1/44023bc1b24c4eea9067b492ab4c27ae/FLAG12a8ef2da [2023-02-18 21:38:09,044 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d63d31a1/44023bc1b24c4eea9067b492ab4c27ae [2023-02-18 21:38:09,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 21:38:09,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 21:38:09,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 21:38:09,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 21:38:09,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 21:38:09,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2edb8a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09, skipping insertion in model container [2023-02-18 21:38:09,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 21:38:09,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 21:38:09,290 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/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2023-02-18 21:38:09,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 21:38:09,308 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 21:38:09,342 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/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2023-02-18 21:38:09,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 21:38:09,359 INFO L208 MainTranslator]: Completed translation [2023-02-18 21:38:09,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09 WrapperNode [2023-02-18 21:38:09,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 21:38:09,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 21:38:09,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 21:38:09,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 21:38:09,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,387 INFO L138 Inliner]: procedures = 119, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 121 [2023-02-18 21:38:09,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 21:38:09,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 21:38:09,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 21:38:09,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 21:38:09,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,411 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 21:38:09,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 21:38:09,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 21:38:09,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 21:38:09,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (1/1) ... [2023-02-18 21:38:09,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 21:38:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:38:09,461 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 21:38:09,464 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 21:38:09,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 21:38:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 21:38:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 21:38:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 21:38:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 21:38:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 21:38:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 21:38:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 21:38:09,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 21:38:09,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 21:38:09,598 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 21:38:09,599 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 21:38:09,823 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 21:38:09,855 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 21:38:09,855 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-18 21:38:09,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:38:09 BoogieIcfgContainer [2023-02-18 21:38:09,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 21:38:09,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 21:38:09,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 21:38:09,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 21:38:09,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 09:38:09" (1/3) ... [2023-02-18 21:38:09,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b1737c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:38:09, skipping insertion in model container [2023-02-18 21:38:09,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:09" (2/3) ... [2023-02-18 21:38:09,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b1737c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:38:09, skipping insertion in model container [2023-02-18 21:38:09,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:38:09" (3/3) ... [2023-02-18 21:38:09,862 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2023-02-18 21:38:09,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 21:38:09,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-02-18 21:38:09,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 21:38:09,934 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@f1f8a1b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 21:38:09,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-02-18 21:38:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-18 21:38:09,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:09,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-18 21:38:09,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-18 21:38:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:09,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128459476] [2023-02-18 21:38:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:10,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:10,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128459476] [2023-02-18 21:38:10,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128459476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:10,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:10,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:38:10,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174425384] [2023-02-18 21:38:10,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:10,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:38:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:38:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:38:10,126 INFO L87 Difference]: Start difference. First operand has 123 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:10,273 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2023-02-18 21:38:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:38:10,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-18 21:38:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:10,282 INFO L225 Difference]: With dead ends: 150 [2023-02-18 21:38:10,282 INFO L226 Difference]: Without dead ends: 146 [2023-02-18 21:38:10,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:38:10,286 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 109 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:10,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 120 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-18 21:38:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 117. [2023-02-18 21:38:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 116 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2023-02-18 21:38:10,323 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 3 [2023-02-18 21:38:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:10,324 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2023-02-18 21:38:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2023-02-18 21:38:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-18 21:38:10,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:10,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-18 21:38:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 21:38:10,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-18 21:38:10,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:10,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141411285] [2023-02-18 21:38:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:10,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141411285] [2023-02-18 21:38:10,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141411285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:10,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:10,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:38:10,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096607990] [2023-02-18 21:38:10,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:10,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:38:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:38:10,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:38:10,434 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:10,537 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2023-02-18 21:38:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:38:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-18 21:38:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:10,539 INFO L225 Difference]: With dead ends: 143 [2023-02-18 21:38:10,539 INFO L226 Difference]: Without dead ends: 143 [2023-02-18 21:38:10,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:38:10,540 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 104 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:10,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-18 21:38:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2023-02-18 21:38:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 113 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2023-02-18 21:38:10,545 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 3 [2023-02-18 21:38:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:10,545 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2023-02-18 21:38:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2023-02-18 21:38:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 21:38:10,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:10,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:10,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 21:38:10,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112042, now seen corresponding path program 1 times [2023-02-18 21:38:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:10,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030225435] [2023-02-18 21:38:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:10,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030225435] [2023-02-18 21:38:10,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030225435] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:10,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:10,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:38:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014374537] [2023-02-18 21:38:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:10,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:38:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:38:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:38:10,651 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:10,750 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2023-02-18 21:38:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:38:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 21:38:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:10,751 INFO L225 Difference]: With dead ends: 114 [2023-02-18 21:38:10,751 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 21:38:10,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:38:10,752 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 165 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:10,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 47 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 21:38:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2023-02-18 21:38:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 105 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-02-18 21:38:10,757 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 9 [2023-02-18 21:38:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:10,757 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-02-18 21:38:10,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-02-18 21:38:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 21:38:10,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:10,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:10,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 21:38:10,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112043, now seen corresponding path program 1 times [2023-02-18 21:38:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065907682] [2023-02-18 21:38:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:10,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:10,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065907682] [2023-02-18 21:38:10,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065907682] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:10,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:10,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:38:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027505979] [2023-02-18 21:38:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:38:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:38:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:38:10,914 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:11,067 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2023-02-18 21:38:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:38:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 21:38:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:11,068 INFO L225 Difference]: With dead ends: 149 [2023-02-18 21:38:11,068 INFO L226 Difference]: Without dead ends: 149 [2023-02-18 21:38:11,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:38:11,070 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 354 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:11,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 62 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:11,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-18 21:38:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2023-02-18 21:38:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.565217391304348) internal successors, (144), 125 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2023-02-18 21:38:11,074 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 9 [2023-02-18 21:38:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:11,074 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2023-02-18 21:38:11,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2023-02-18 21:38:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 21:38:11,075 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:11,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:11,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 21:38:11,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413642, now seen corresponding path program 1 times [2023-02-18 21:38:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123537669] [2023-02-18 21:38:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:11,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123537669] [2023-02-18 21:38:11,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123537669] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:11,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:11,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:38:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439620595] [2023-02-18 21:38:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:38:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:38:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:38:11,204 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:11,304 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2023-02-18 21:38:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:38:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 21:38:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:11,306 INFO L225 Difference]: With dead ends: 125 [2023-02-18 21:38:11,306 INFO L226 Difference]: Without dead ends: 125 [2023-02-18 21:38:11,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:38:11,309 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 7 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:11,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 216 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-18 21:38:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-18 21:38:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.5434782608695652) internal successors, (142), 124 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2023-02-18 21:38:11,325 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 12 [2023-02-18 21:38:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:11,325 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2023-02-18 21:38:11,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2023-02-18 21:38:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 21:38:11,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:11,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:11,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 21:38:11,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413643, now seen corresponding path program 1 times [2023-02-18 21:38:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316225782] [2023-02-18 21:38:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316225782] [2023-02-18 21:38:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316225782] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:11,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:11,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:38:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477510467] [2023-02-18 21:38:11,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:38:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:38:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:38:11,414 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:11,517 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2023-02-18 21:38:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:38:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 21:38:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:11,519 INFO L225 Difference]: With dead ends: 124 [2023-02-18 21:38:11,519 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 21:38:11,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:38:11,522 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:11,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 226 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 21:38:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-02-18 21:38:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 123 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2023-02-18 21:38:11,529 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 12 [2023-02-18 21:38:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:11,529 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2023-02-18 21:38:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2023-02-18 21:38:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 21:38:11,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:11,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 21:38:11,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1478309260, now seen corresponding path program 1 times [2023-02-18 21:38:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:11,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466344518] [2023-02-18 21:38:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:11,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:11,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466344518] [2023-02-18 21:38:11,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466344518] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:11,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:11,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:38:11,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303596077] [2023-02-18 21:38:11,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:11,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:38:11,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:38:11,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:38:11,680 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:11,767 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2023-02-18 21:38:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:38:11,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 21:38:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:11,769 INFO L225 Difference]: With dead ends: 132 [2023-02-18 21:38:11,769 INFO L226 Difference]: Without dead ends: 132 [2023-02-18 21:38:11,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:38:11,771 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 20 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:11,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 266 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-18 21:38:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2023-02-18 21:38:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.5104166666666667) internal successors, (145), 127 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2023-02-18 21:38:11,774 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 16 [2023-02-18 21:38:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:11,774 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2023-02-18 21:38:11,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2023-02-18 21:38:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 21:38:11,775 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:11,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:11,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 21:38:11,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362871, now seen corresponding path program 1 times [2023-02-18 21:38:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:11,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925892600] [2023-02-18 21:38:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:11,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925892600] [2023-02-18 21:38:11,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925892600] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:11,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:11,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 21:38:11,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986271931] [2023-02-18 21:38:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 21:38:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 21:38:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:38:11,932 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:12,152 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2023-02-18 21:38:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 21:38:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 21:38:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:12,153 INFO L225 Difference]: With dead ends: 132 [2023-02-18 21:38:12,153 INFO L226 Difference]: Without dead ends: 132 [2023-02-18 21:38:12,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:38:12,154 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 158 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:12,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 167 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:38:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-18 21:38:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2023-02-18 21:38:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.5) internal successors, (144), 126 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2023-02-18 21:38:12,155 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 16 [2023-02-18 21:38:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:12,156 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2023-02-18 21:38:12,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2023-02-18 21:38:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 21:38:12,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:12,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:12,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 21:38:12,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362872, now seen corresponding path program 1 times [2023-02-18 21:38:12,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:12,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723410871] [2023-02-18 21:38:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:12,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723410871] [2023-02-18 21:38:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723410871] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:12,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:12,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 21:38:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619748625] [2023-02-18 21:38:12,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:12,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 21:38:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 21:38:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:38:12,375 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:12,643 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2023-02-18 21:38:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 21:38:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 21:38:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:12,644 INFO L225 Difference]: With dead ends: 128 [2023-02-18 21:38:12,644 INFO L226 Difference]: Without dead ends: 128 [2023-02-18 21:38:12,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2023-02-18 21:38:12,645 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:12,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 182 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:38:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-18 21:38:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2023-02-18 21:38:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 90 states have (on average 1.4777777777777779) internal successors, (133), 115 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2023-02-18 21:38:12,647 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 16 [2023-02-18 21:38:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:12,647 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2023-02-18 21:38:12,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2023-02-18 21:38:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 21:38:12,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:12,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:12,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 21:38:12,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1695296497, now seen corresponding path program 1 times [2023-02-18 21:38:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263886160] [2023-02-18 21:38:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:12,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:12,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263886160] [2023-02-18 21:38:12,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263886160] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:38:12,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001566081] [2023-02-18 21:38:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:12,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:38:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:38:12,814 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 21:38:12,846 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 21:38:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:12,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 21:38:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:38:12,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21:38:12,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:38:12,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-18 21:38:12,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 21:38:13,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:13,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 42 [2023-02-18 21:38:13,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2023-02-18 21:38:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:13,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:38:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:13,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001566081] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:38:13,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:38:13,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 21:38:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960821623] [2023-02-18 21:38:13,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:38:13,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:38:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:38:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:38:13,101 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:13,450 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2023-02-18 21:38:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 21:38:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 21:38:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:13,451 INFO L225 Difference]: With dead ends: 162 [2023-02-18 21:38:13,451 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 21:38:13,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2023-02-18 21:38:13,452 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 256 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:13,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 203 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:38:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 21:38:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 119. [2023-02-18 21:38:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 118 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2023-02-18 21:38:13,455 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 20 [2023-02-18 21:38:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:13,455 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2023-02-18 21:38:13,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2023-02-18 21:38:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 21:38:13,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:13,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:13,475 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 21:38:13,664 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,SelfDestructingSolverStorable9 [2023-02-18 21:38:13,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1695296498, now seen corresponding path program 1 times [2023-02-18 21:38:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:13,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260413840] [2023-02-18 21:38:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:13,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:13,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260413840] [2023-02-18 21:38:13,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260413840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:38:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550993377] [2023-02-18 21:38:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:13,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:38:13,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:38:13,904 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 21:38:13,921 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 21:38:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 21:38:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:38:13,996 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 13 treesize of output 9 [2023-02-18 21:38:14,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-18 21:38:14,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-18 21:38:14,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:38:14,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2023-02-18 21:38:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:14,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 21:38:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550993377] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 21:38:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-02-18 21:38:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048831153] [2023-02-18 21:38:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:14,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:38:14,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:38:14,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-18 21:38:14,089 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:14,282 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2023-02-18 21:38:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 21:38:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 21:38:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:14,283 INFO L225 Difference]: With dead ends: 144 [2023-02-18 21:38:14,283 INFO L226 Difference]: Without dead ends: 143 [2023-02-18 21:38:14,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-02-18 21:38:14,283 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 45 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:14,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 236 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:38:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-18 21:38:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2023-02-18 21:38:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 91 states have (on average 1.4505494505494505) internal successors, (132), 115 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2023-02-18 21:38:14,286 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 20 [2023-02-18 21:38:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:14,286 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2023-02-18 21:38:14,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2023-02-18 21:38:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 21:38:14,286 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:14,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:14,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 21:38:14,493 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,SelfDestructingSolverStorable10 [2023-02-18 21:38:14,494 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1116806667, now seen corresponding path program 1 times [2023-02-18 21:38:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:14,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913818286] [2023-02-18 21:38:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:14,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913818286] [2023-02-18 21:38:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913818286] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:14,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:14,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 21:38:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806273251] [2023-02-18 21:38:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 21:38:14,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 21:38:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:38:14,539 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:14,673 INFO L93 Difference]: Finished difference Result 179 states and 199 transitions. [2023-02-18 21:38:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:38:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 21:38:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:14,674 INFO L225 Difference]: With dead ends: 179 [2023-02-18 21:38:14,675 INFO L226 Difference]: Without dead ends: 179 [2023-02-18 21:38:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:38:14,675 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 51 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 407 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-18 21:38:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2023-02-18 21:38:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 128 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2023-02-18 21:38:14,679 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 20 [2023-02-18 21:38:14,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:14,679 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2023-02-18 21:38:14,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2023-02-18 21:38:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 21:38:14,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:14,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:14,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 21:38:14,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:14,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1012953034, now seen corresponding path program 1 times [2023-02-18 21:38:14,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:14,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860017633] [2023-02-18 21:38:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:14,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:14,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:14,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860017633] [2023-02-18 21:38:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860017633] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:14,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 21:38:14,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445412118] [2023-02-18 21:38:14,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:14,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:38:14,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:14,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:38:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:38:14,795 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:14,964 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2023-02-18 21:38:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 21:38:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 21:38:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:14,965 INFO L225 Difference]: With dead ends: 159 [2023-02-18 21:38:14,965 INFO L226 Difference]: Without dead ends: 159 [2023-02-18 21:38:14,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-18 21:38:14,965 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 220 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:14,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 119 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-18 21:38:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 133. [2023-02-18 21:38:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 132 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2023-02-18 21:38:14,968 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 21 [2023-02-18 21:38:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:14,968 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2023-02-18 21:38:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2023-02-18 21:38:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 21:38:14,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:14,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:14,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 21:38:14,969 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1012953035, now seen corresponding path program 1 times [2023-02-18 21:38:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:14,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582571982] [2023-02-18 21:38:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:14,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:15,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:15,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582571982] [2023-02-18 21:38:15,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582571982] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:15,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:15,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 21:38:15,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112839357] [2023-02-18 21:38:15,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:15,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 21:38:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:15,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 21:38:15,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:38:15,114 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:15,339 INFO L93 Difference]: Finished difference Result 192 states and 211 transitions. [2023-02-18 21:38:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:38:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 21:38:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:15,340 INFO L225 Difference]: With dead ends: 192 [2023-02-18 21:38:15,340 INFO L226 Difference]: Without dead ends: 192 [2023-02-18 21:38:15,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-18 21:38:15,340 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 367 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:15,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 190 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:38:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-18 21:38:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 135. [2023-02-18 21:38:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 110 states have (on average 1.4272727272727272) internal successors, (157), 134 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2023-02-18 21:38:15,342 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 21 [2023-02-18 21:38:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:15,342 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2023-02-18 21:38:15,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2023-02-18 21:38:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 21:38:15,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:15,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 21:38:15,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1509706513, now seen corresponding path program 1 times [2023-02-18 21:38:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:15,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916075585] [2023-02-18 21:38:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:15,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:15,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:15,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916075585] [2023-02-18 21:38:15,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916075585] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:15,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:15,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 21:38:15,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244890775] [2023-02-18 21:38:15,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:15,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 21:38:15,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 21:38:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:38:15,559 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:15,897 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2023-02-18 21:38:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 21:38:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 21:38:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:15,898 INFO L225 Difference]: With dead ends: 202 [2023-02-18 21:38:15,898 INFO L226 Difference]: Without dead ends: 202 [2023-02-18 21:38:15,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-02-18 21:38:15,899 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 164 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:15,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 398 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:38:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-18 21:38:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 147. [2023-02-18 21:38:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 146 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2023-02-18 21:38:15,901 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 23 [2023-02-18 21:38:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:15,901 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2023-02-18 21:38:15,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2023-02-18 21:38:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 21:38:15,902 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:15,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 21:38:15,902 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash 442909652, now seen corresponding path program 1 times [2023-02-18 21:38:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:15,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188930943] [2023-02-18 21:38:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:15,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:15,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188930943] [2023-02-18 21:38:15,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188930943] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:15,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:15,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:38:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078736987] [2023-02-18 21:38:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:38:15,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:38:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:38:15,931 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:16,003 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2023-02-18 21:38:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:38:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 21:38:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:16,004 INFO L225 Difference]: With dead ends: 172 [2023-02-18 21:38:16,004 INFO L226 Difference]: Without dead ends: 172 [2023-02-18 21:38:16,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:38:16,004 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 159 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:16,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 102 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-18 21:38:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 147. [2023-02-18 21:38:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.3852459016393444) internal successors, (169), 146 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2023-02-18 21:38:16,007 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 24 [2023-02-18 21:38:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:16,007 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2023-02-18 21:38:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2023-02-18 21:38:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 21:38:16,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:16,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:16,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 21:38:16,008 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1972392122, now seen corresponding path program 1 times [2023-02-18 21:38:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:16,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556118264] [2023-02-18 21:38:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:16,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556118264] [2023-02-18 21:38:16,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556118264] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:16,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:16,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 21:38:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93406331] [2023-02-18 21:38:16,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:16,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:38:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:38:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:38:16,119 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:16,306 INFO L93 Difference]: Finished difference Result 207 states and 229 transitions. [2023-02-18 21:38:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:38:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 21:38:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:16,308 INFO L225 Difference]: With dead ends: 207 [2023-02-18 21:38:16,308 INFO L226 Difference]: Without dead ends: 207 [2023-02-18 21:38:16,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:38:16,308 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 172 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:16,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 292 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:38:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-18 21:38:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 151. [2023-02-18 21:38:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 126 states have (on average 1.373015873015873) internal successors, (173), 150 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2023-02-18 21:38:16,312 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 25 [2023-02-18 21:38:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:16,312 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2023-02-18 21:38:16,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,312 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2023-02-18 21:38:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 21:38:16,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:16,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 21:38:16,313 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 435867832, now seen corresponding path program 1 times [2023-02-18 21:38:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971937211] [2023-02-18 21:38:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:16,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971937211] [2023-02-18 21:38:16,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971937211] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:38:16,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:38:16,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:38:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394094669] [2023-02-18 21:38:16,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:38:16,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:38:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:38:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:38:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:38:16,366 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:38:16,468 INFO L93 Difference]: Finished difference Result 169 states and 189 transitions. [2023-02-18 21:38:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:38:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 21:38:16,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:38:16,469 INFO L225 Difference]: With dead ends: 169 [2023-02-18 21:38:16,469 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 21:38:16,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:38:16,469 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 155 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:38:16,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 93 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:38:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 21:38:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2023-02-18 21:38:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 151 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2023-02-18 21:38:16,472 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 26 [2023-02-18 21:38:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:38:16,472 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2023-02-18 21:38:16,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:38:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2023-02-18 21:38:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 21:38:16,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:38:16,473 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:38:16,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 21:38:16,473 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-02-18 21:38:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:38:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1248965482, now seen corresponding path program 1 times [2023-02-18 21:38:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:38:16,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978841427] [2023-02-18 21:38:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:16,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:38:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:38:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:38:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978841427] [2023-02-18 21:38:16,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978841427] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:38:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031503222] [2023-02-18 21:38:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:38:16,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:38:16,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:38:16,738 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 21:38:16,752 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 21:38:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:38:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-18 21:38:16,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:38:16,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21:38:16,852 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 11 treesize of output 7 [2023-02-18 21:38:16,853 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 11 treesize of output 7 [2023-02-18 21:38:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:16,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-18 21:38:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:16,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-18 21:38:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:16,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-18 21:38:16,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:16,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-18 21:38:16,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:38:16,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-18 21:38:16,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 21:38:16,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 21:38:16,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-18 21:38:16,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-18 21:38:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:16,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2023-02-18 21:38:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:38:16,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:38:16,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 49 [2023-02-18 21:38:17,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:38:17,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 156 treesize of output 234 [2023-02-18 21:38:17,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:38:17,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 100 treesize of output 192