./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0232-2.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/memsafety/test-0232-2.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 d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:17:54,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:17:54,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:17:54,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:17:54,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:17:54,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:17:54,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:17:54,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:17:54,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:17:54,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:17:54,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:17:54,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:17:54,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:17:54,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:17:54,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:17:54,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:17:54,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:17:54,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:17:54,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:17:54,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:17:54,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:17:54,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:17:54,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:17:54,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:17:54,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:17:54,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:17:54,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:17:54,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:17:54,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:17:54,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:17:54,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:17:54,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:17:54,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:17:54,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:17:54,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:17:54,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:17:54,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:17:54,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:17:54,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:17:54,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:17:54,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:17:54,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:17:54,780 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:17:54,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:17:54,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:17:54,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:17:54,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:17:54,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:17:54,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:17:54,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:17:54,782 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:17:54,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:17:54,783 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:17:54,783 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:17:54,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:17:54,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:17:54,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:17:54,784 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:17:54,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:17:54,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:17:54,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:17:54,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:17:54,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:17:54,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:17:54,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:17:54,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:17:54,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:17:54,786 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:17:54,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:17:54,786 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:17:54,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7d99b84861b7e58e44833cf97c5fb5fa14d1ad6f1b87526d3144a9659451e97 [2023-02-17 08:17:54,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:17:54,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:17:54,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:17:54,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:17:54,999 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:17:55,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-2.i [2023-02-17 08:17:56,014 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:17:56,265 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:17:56,266 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-2.i [2023-02-17 08:17:56,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dd90e4a/6ec312af83f94f349fe8e4da09b79a62/FLAGd69bd4324 [2023-02-17 08:17:56,286 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dd90e4a/6ec312af83f94f349fe8e4da09b79a62 [2023-02-17 08:17:56,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:17:56,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:17:56,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:17:56,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:17:56,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:17:56,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39601833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56, skipping insertion in model container [2023-02-17 08:17:56,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:17:56,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:17:56,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:17:56,653 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:17:56,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:17:56,724 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:17:56,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56 WrapperNode [2023-02-17 08:17:56,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:17:56,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:17:56,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:17:56,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:17:56,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,782 INFO L138 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-02-17 08:17:56,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:17:56,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:17:56,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:17:56,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:17:56,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:17:56,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:17:56,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:17:56,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:17:56,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (1/1) ... [2023-02-17 08:17:56,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:17:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:17:56,841 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) [2023-02-17 08:17:56,855 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 [2023-02-17 08:17:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:17:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 08:17:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 08:17:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 08:17:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 08:17:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:17:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 08:17:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 08:17:56,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:17:56,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:17:57,083 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:17:57,085 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:17:57,379 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:17:57,384 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:17:57,395 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 08:17:57,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:17:57 BoogieIcfgContainer [2023-02-17 08:17:57,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:17:57,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:17:57,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:17:57,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:17:57,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:17:56" (1/3) ... [2023-02-17 08:17:57,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585eaf76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:17:57, skipping insertion in model container [2023-02-17 08:17:57,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:17:56" (2/3) ... [2023-02-17 08:17:57,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585eaf76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:17:57, skipping insertion in model container [2023-02-17 08:17:57,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:17:57" (3/3) ... [2023-02-17 08:17:57,402 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-2.i [2023-02-17 08:17:57,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:17:57,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2023-02-17 08:17:57,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:17:57,445 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;@76394a0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:17:57,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-02-17 08:17:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 45 states have (on average 2.2) internal successors, (99), 93 states have internal predecessors, (99), 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) [2023-02-17 08:17:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 08:17:57,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:57,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 08:17:57,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2023-02-17 08:17:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:57,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588218283] [2023-02-17 08:17:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:57,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:57,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588218283] [2023-02-17 08:17:57,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588218283] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:57,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:57,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:17:57,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219218560] [2023-02-17 08:17:57,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:17:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:17:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:17:57,697 INFO L87 Difference]: Start difference. First operand has 94 states, 45 states have (on average 2.2) internal successors, (99), 93 states have internal predecessors, (99), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-02-17 08:17:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:57,856 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2023-02-17 08:17:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:17:57,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2023-02-17 08:17:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:57,865 INFO L225 Difference]: With dead ends: 105 [2023-02-17 08:17:57,866 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 08:17:57,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:57,870 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 150 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:57,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 65 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 08:17:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2023-02-17 08:17:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 83 states have internal predecessors, (87), 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) [2023-02-17 08:17:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2023-02-17 08:17:57,899 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 4 [2023-02-17 08:17:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:57,900 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2023-02-17 08:17:57,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-02-17 08:17:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2023-02-17 08:17:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 08:17:57,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:57,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 08:17:57,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:17:57,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2023-02-17 08:17:57,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:57,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442173523] [2023-02-17 08:17:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:57,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:58,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:58,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442173523] [2023-02-17 08:17:58,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442173523] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:58,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:58,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:17:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936882352] [2023-02-17 08:17:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:17:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:17:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:17:58,065 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-02-17 08:17:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:58,290 INFO L93 Difference]: Finished difference Result 171 states and 178 transitions. [2023-02-17 08:17:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:17:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2023-02-17 08:17:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:58,296 INFO L225 Difference]: With dead ends: 171 [2023-02-17 08:17:58,296 INFO L226 Difference]: Without dead ends: 171 [2023-02-17 08:17:58,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:58,302 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 151 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:58,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 123 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:17:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-17 08:17:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 89. [2023-02-17 08:17:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.830188679245283) internal successors, (97), 88 states have internal predecessors, (97), 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) [2023-02-17 08:17:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2023-02-17 08:17:58,317 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 4 [2023-02-17 08:17:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:58,318 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2023-02-17 08:17:58,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-02-17 08:17:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2023-02-17 08:17:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 08:17:58,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:58,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 08:17:58,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:17:58,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2023-02-17 08:17:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023544132] [2023-02-17 08:17:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:58,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023544132] [2023-02-17 08:17:58,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023544132] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:58,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:58,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:17:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408911796] [2023-02-17 08:17:58,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:17:58,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:17:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:17:58,373 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:17:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:58,435 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2023-02-17 08:17:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:17:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-02-17 08:17:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:58,438 INFO L225 Difference]: With dead ends: 95 [2023-02-17 08:17:58,438 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 08:17:58,438 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 [2023-02-17 08:17:58,439 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 52 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:58,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 67 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 08:17:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-17 08:17:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 84 states have internal predecessors, (92), 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) [2023-02-17 08:17:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-02-17 08:17:58,448 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 5 [2023-02-17 08:17:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:58,449 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-02-17 08:17:58,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:17:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-02-17 08:17:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 08:17:58,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:58,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 08:17:58,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:17:58,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2023-02-17 08:17:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:58,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740436267] [2023-02-17 08:17:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:58,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:58,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740436267] [2023-02-17 08:17:58,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740436267] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:58,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:58,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:17:58,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045348005] [2023-02-17 08:17:58,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:58,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:17:58,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:58,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:17:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:17:58,499 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:17:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:58,548 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2023-02-17 08:17:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:17:58,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-02-17 08:17:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:58,551 INFO L225 Difference]: With dead ends: 82 [2023-02-17 08:17:58,551 INFO L226 Difference]: Without dead ends: 82 [2023-02-17 08:17:58,552 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 [2023-02-17 08:17:58,557 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:58,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 44 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:17:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-17 08:17:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-02-17 08:17:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 80 states have internal predecessors, (87), 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) [2023-02-17 08:17:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-02-17 08:17:58,567 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 5 [2023-02-17 08:17:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:58,567 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-02-17 08:17:58,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:17:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-02-17 08:17:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 08:17:58,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:58,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:17:58,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2023-02-17 08:17:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859508513] [2023-02-17 08:17:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:58,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859508513] [2023-02-17 08:17:58,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859508513] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:58,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:58,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:17:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903355805] [2023-02-17 08:17:58,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:58,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:17:58,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:17:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:17:58,752 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2023-02-17 08:17:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:58,871 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-02-17 08:17:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:17:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 10 [2023-02-17 08:17:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:58,873 INFO L225 Difference]: With dead ends: 91 [2023-02-17 08:17:58,873 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 08:17:58,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:17:58,874 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 17 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:58,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 353 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 08:17:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2023-02-17 08:17:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.576271186440678) internal successors, (93), 86 states have internal predecessors, (93), 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) [2023-02-17 08:17:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2023-02-17 08:17:58,892 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 10 [2023-02-17 08:17:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:58,892 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2023-02-17 08:17:58,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2023-02-17 08:17:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2023-02-17 08:17:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 08:17:58,893 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:58,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:58,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:17:58,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1762075788, now seen corresponding path program 1 times [2023-02-17 08:17:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:58,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864801749] [2023-02-17 08:17:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864801749] [2023-02-17 08:17:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864801749] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:58,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240037874] [2023-02-17 08:17:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:58,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:17:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:17:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:17:58,994 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-02-17 08:17:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:59,075 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2023-02-17 08:17:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:17:59,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 11 [2023-02-17 08:17:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:59,077 INFO L225 Difference]: With dead ends: 95 [2023-02-17 08:17:59,077 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 08:17:59,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:17:59,078 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:59,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 49 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 08:17:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2023-02-17 08:17:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 82 states have internal predecessors, (89), 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) [2023-02-17 08:17:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2023-02-17 08:17:59,083 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 11 [2023-02-17 08:17:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:59,084 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2023-02-17 08:17:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-02-17 08:17:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2023-02-17 08:17:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 08:17:59,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:59,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:59,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 08:17:59,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015976, now seen corresponding path program 1 times [2023-02-17 08:17:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:59,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027011547] [2023-02-17 08:17:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027011547] [2023-02-17 08:17:59,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027011547] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:59,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:59,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:59,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65154998] [2023-02-17 08:17:59,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:59,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:17:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:17:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:17:59,244 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-02-17 08:17:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:59,356 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2023-02-17 08:17:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:17:59,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2023-02-17 08:17:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:59,358 INFO L225 Difference]: With dead ends: 91 [2023-02-17 08:17:59,358 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 08:17:59,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:17:59,361 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 112 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:59,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 94 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 08:17:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-02-17 08:17:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 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) [2023-02-17 08:17:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-02-17 08:17:59,375 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 18 [2023-02-17 08:17:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:59,375 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-02-17 08:17:59,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-02-17 08:17:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-02-17 08:17:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 08:17:59,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:59,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:59,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 08:17:59,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015977, now seen corresponding path program 1 times [2023-02-17 08:17:59,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:59,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195966587] [2023-02-17 08:17:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:59,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:59,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195966587] [2023-02-17 08:17:59,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195966587] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:59,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:59,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463779422] [2023-02-17 08:17:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:17:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:17:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:17:59,657 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-02-17 08:17:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:59,727 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2023-02-17 08:17:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:17:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 18 [2023-02-17 08:17:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:59,728 INFO L225 Difference]: With dead ends: 93 [2023-02-17 08:17:59,728 INFO L226 Difference]: Without dead ends: 93 [2023-02-17 08:17:59,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:17:59,730 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 205 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:59,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 92 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-17 08:17:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2023-02-17 08:17:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 80 states have internal predecessors, (87), 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) [2023-02-17 08:17:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-02-17 08:17:59,739 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 18 [2023-02-17 08:17:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:59,739 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-02-17 08:17:59,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-02-17 08:17:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-02-17 08:17:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 08:17:59,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:59,742 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] [2023-02-17 08:17:59,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 08:17:59,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:59,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1257146476, now seen corresponding path program 1 times [2023-02-17 08:17:59,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:59,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230288699] [2023-02-17 08:17:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:59,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230288699] [2023-02-17 08:17:59,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230288699] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:59,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:59,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631096182] [2023-02-17 08:17:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:59,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:17:59,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:17:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:59,810 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-02-17 08:17:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:59,862 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-02-17 08:17:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:17:59,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 [2023-02-17 08:17:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:59,863 INFO L225 Difference]: With dead ends: 75 [2023-02-17 08:17:59,863 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 08:17:59,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:17:59,863 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:59,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 107 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:17:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 08:17:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-02-17 08:17:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.54) internal successors, (77), 74 states have internal predecessors, (77), 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) [2023-02-17 08:17:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2023-02-17 08:17:59,866 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 20 [2023-02-17 08:17:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:59,866 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2023-02-17 08:17:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-02-17 08:17:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2023-02-17 08:17:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 08:17:59,867 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:59,867 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] [2023-02-17 08:17:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 08:17:59,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -663319494, now seen corresponding path program 1 times [2023-02-17 08:17:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426162184] [2023-02-17 08:17:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:59,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:59,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:59,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426162184] [2023-02-17 08:17:59,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426162184] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:59,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:59,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:17:59,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12053645] [2023-02-17 08:17:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:59,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:17:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:17:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:59,914 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2023-02-17 08:17:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:59,974 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2023-02-17 08:17:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:17:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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 [2023-02-17 08:17:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:59,975 INFO L225 Difference]: With dead ends: 74 [2023-02-17 08:17:59,975 INFO L226 Difference]: Without dead ends: 74 [2023-02-17 08:17:59,975 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 [2023-02-17 08:17:59,976 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 16 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:59,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-17 08:17:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-17 08:17:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.52) internal successors, (76), 73 states have internal predecessors, (76), 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) [2023-02-17 08:17:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-02-17 08:17:59,978 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 21 [2023-02-17 08:17:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:59,978 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-02-17 08:17:59,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2023-02-17 08:17:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-02-17 08:17:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 08:17:59,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:59,979 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] [2023-02-17 08:17:59,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 08:17:59,979 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:17:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:59,979 INFO L85 PathProgramCache]: Analyzing trace with hash -663319493, now seen corresponding path program 1 times [2023-02-17 08:17:59,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:59,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316702782] [2023-02-17 08:17:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:59,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:18:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:18:00,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:18:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316702782] [2023-02-17 08:18:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316702782] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:18:00,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:18:00,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:18:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741900297] [2023-02-17 08:18:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:18:00,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:18:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:18:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:18:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:18:00,140 INFO L87 Difference]: Start difference. First operand 74 states and 76 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) [2023-02-17 08:18:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:18:00,222 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2023-02-17 08:18:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:18:00,223 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 [2023-02-17 08:18:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:18:00,225 INFO L225 Difference]: With dead ends: 73 [2023-02-17 08:18:00,225 INFO L226 Difference]: Without dead ends: 73 [2023-02-17 08:18:00,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:18:00,226 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 148 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:18:00,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 116 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:18:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-17 08:18:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-02-17 08:18:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.5) internal successors, (75), 72 states have internal predecessors, (75), 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) [2023-02-17 08:18:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2023-02-17 08:18:00,228 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 21 [2023-02-17 08:18:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:18:00,229 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2023-02-17 08:18:00,229 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) [2023-02-17 08:18:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2023-02-17 08:18:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 08:18:00,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:18:00,231 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] [2023-02-17 08:18:00,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 08:18:00,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:18:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:18:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash 911932203, now seen corresponding path program 1 times [2023-02-17 08:18:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:18:00,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489861890] [2023-02-17 08:18:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:18:00,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:18:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:18:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:18:00,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:18:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489861890] [2023-02-17 08:18:00,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489861890] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:18:00,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:18:00,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 08:18:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709488731] [2023-02-17 08:18:00,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:18:00,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:18:00,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:18:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:18:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:18:00,535 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2023-02-17 08:18:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:18:00,786 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2023-02-17 08:18:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 08:18:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 22 [2023-02-17 08:18:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:18:00,787 INFO L225 Difference]: With dead ends: 139 [2023-02-17 08:18:00,787 INFO L226 Difference]: Without dead ends: 139 [2023-02-17 08:18:00,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-02-17 08:18:00,787 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 306 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:18:00,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 204 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:18:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-17 08:18:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2023-02-17 08:18:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.40625) internal successors, (90), 86 states have internal predecessors, (90), 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) [2023-02-17 08:18:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2023-02-17 08:18:00,790 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 22 [2023-02-17 08:18:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:18:00,790 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2023-02-17 08:18:00,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2023-02-17 08:18:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2023-02-17 08:18:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 08:18:00,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:18:00,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:18:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 08:18:00,791 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-02-17 08:18:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:18:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2023-02-17 08:18:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:18:00,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346267965] [2023-02-17 08:18:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:18:00,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:18:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:18:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:18:00,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:18:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346267965] [2023-02-17 08:18:00,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346267965] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:18:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599968927] [2023-02-17 08:18:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:18:00,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:18:00,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:18:00,954 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) [2023-02-17 08:18:00,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:18:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:18:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 08:18:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:18:01,192 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 [2023-02-17 08:18:01,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:18:01,214 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 21 treesize of output 59 [2023-02-17 08:18:01,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:18:01,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 74 treesize of output 112 [2023-02-17 08:18:01,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:18:01,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 253 case distinctions, treesize of input 454 treesize of output 2330