./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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-ext2/split_list_test05-1.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 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:19:19,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:19:19,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:19:19,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:19:19,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:19:19,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:19:19,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:19:19,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:19:19,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:19:19,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:19:19,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:19:19,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:19:19,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:19:19,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:19:19,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:19:19,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:19:19,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:19:19,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:19:19,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:19:19,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:19:19,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:19:19,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:19:19,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:19:19,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:19:19,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:19:19,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:19:19,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:19:19,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:19:19,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:19:19,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:19:19,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:19:19,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:19:19,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:19:19,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:19:19,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:19:19,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:19:19,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:19:19,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:19:19,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:19:19,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:19:19,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:19:19,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:19:20,019 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:19:20,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:19:20,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:19:20,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:19:20,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:19:20,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:19:20,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:19:20,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:19:20,022 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:19:20,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:19:20,022 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:19:20,023 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:19:20,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:19:20,024 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:19:20,024 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:19:20,024 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:19:20,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:19:20,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:19:20,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:19:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:19:20,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:19:20,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:19:20,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:19:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:19:20,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:19:20,025 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:19:20,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:19:20,026 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:19:20,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2023-02-16 03:19:20,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:19:20,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:19:20,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:19:20,253 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:19:20,254 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:19:20,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2023-02-16 03:19:21,155 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:19:21,349 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:19:21,350 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2023-02-16 03:19:21,363 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd97a4d0c/5aeecc1b8eac40aca014daaef5406831/FLAG3e5fa5b45 [2023-02-16 03:19:21,376 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd97a4d0c/5aeecc1b8eac40aca014daaef5406831 [2023-02-16 03:19:21,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:19:21,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:19:21,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:19:21,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:19:21,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:19:21,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74dce140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21, skipping insertion in model container [2023-02-16 03:19:21,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:19:21,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:19:21,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:19:21,688 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:19:21,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:19:21,761 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:19:21,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21 WrapperNode [2023-02-16 03:19:21,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:19:21,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:19:21,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:19:21,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:19:21,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,814 INFO L138 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 304 [2023-02-16 03:19:21,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:19:21,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:19:21,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:19:21,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:19:21,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,867 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:19:21,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:19:21,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:19:21,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:19:21,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (1/1) ... [2023-02-16 03:19:21,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:19:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:19:21,905 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) [2023-02-16 03:19:21,913 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 [2023-02-16 03:19:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:19:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:19:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 03:19:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:19:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 03:19:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 03:19:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:19:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:19:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:19:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:19:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure append [2023-02-16 03:19:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2023-02-16 03:19:22,031 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:19:22,032 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:19:22,604 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:19:22,624 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:19:22,630 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-16 03:19:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:19:22 BoogieIcfgContainer [2023-02-16 03:19:22,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:19:22,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:19:22,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:19:22,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:19:22,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:19:21" (1/3) ... [2023-02-16 03:19:22,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387e5475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:19:22, skipping insertion in model container [2023-02-16 03:19:22,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:19:21" (2/3) ... [2023-02-16 03:19:22,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387e5475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:19:22, skipping insertion in model container [2023-02-16 03:19:22,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:19:22" (3/3) ... [2023-02-16 03:19:22,678 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2023-02-16 03:19:22,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:19:22,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2023-02-16 03:19:22,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:19:22,742 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;@3de75021, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:19:22,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2023-02-16 03:19:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-16 03:19:22,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:22,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-16 03:19:22,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-02-16 03:19:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:22,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357030924] [2023-02-16 03:19:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:22,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357030924] [2023-02-16 03:19:22,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357030924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:22,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:22,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:19:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716921936] [2023-02-16 03:19:22,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:22,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:19:22,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:22,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:19:22,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:19:22,944 INFO L87 Difference]: Start difference. First operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:23,290 INFO L93 Difference]: Finished difference Result 548 states and 601 transitions. [2023-02-16 03:19:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:19:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-16 03:19:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:23,303 INFO L225 Difference]: With dead ends: 548 [2023-02-16 03:19:23,303 INFO L226 Difference]: Without dead ends: 546 [2023-02-16 03:19:23,304 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 [2023-02-16 03:19:23,307 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 246 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:23,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 436 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:19:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-16 03:19:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2023-02-16 03:19:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 247 states have (on average 2.0890688259109313) internal successors, (516), 393 states have internal predecessors, (516), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 544 transitions. [2023-02-16 03:19:23,360 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 544 transitions. Word has length 3 [2023-02-16 03:19:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:23,361 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 544 transitions. [2023-02-16 03:19:23,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 544 transitions. [2023-02-16 03:19:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-02-16 03:19:23,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:23,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-02-16 03:19:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:19:23,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-02-16 03:19:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:23,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323186131] [2023-02-16 03:19:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323186131] [2023-02-16 03:19:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323186131] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:23,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:23,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:19:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974831331] [2023-02-16 03:19:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:19:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:19:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:19:23,455 INFO L87 Difference]: Start difference. First operand 407 states and 544 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:23,666 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2023-02-16 03:19:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:19:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-02-16 03:19:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:23,669 INFO L225 Difference]: With dead ends: 408 [2023-02-16 03:19:23,670 INFO L226 Difference]: Without dead ends: 408 [2023-02-16 03:19:23,673 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 [2023-02-16 03:19:23,674 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 6 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 554 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:19:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-16 03:19:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2023-02-16 03:19:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 247 states have (on average 2.080971659919028) internal successors, (514), 391 states have internal predecessors, (514), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 542 transitions. [2023-02-16 03:19:23,711 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 542 transitions. Word has length 3 [2023-02-16 03:19:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:23,713 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 542 transitions. [2023-02-16 03:19:23,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 542 transitions. [2023-02-16 03:19:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:19:23,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:23,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:19:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:19:23,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390162, now seen corresponding path program 1 times [2023-02-16 03:19:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:23,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421086138] [2023-02-16 03:19:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:23,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421086138] [2023-02-16 03:19:23,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421086138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:23,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:23,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:19:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126034061] [2023-02-16 03:19:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:23,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:19:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:23,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:19:23,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:19:23,788 INFO L87 Difference]: Start difference. First operand 405 states and 542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:23,939 INFO L93 Difference]: Finished difference Result 400 states and 537 transitions. [2023-02-16 03:19:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:19:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:19:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:23,941 INFO L225 Difference]: With dead ends: 400 [2023-02-16 03:19:23,941 INFO L226 Difference]: Without dead ends: 400 [2023-02-16 03:19:23,941 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 [2023-02-16 03:19:23,946 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:23,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 497 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:19:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-02-16 03:19:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2023-02-16 03:19:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 247 states have (on average 2.0607287449392713) internal successors, (509), 386 states have internal predecessors, (509), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 537 transitions. [2023-02-16 03:19:23,957 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 537 transitions. Word has length 10 [2023-02-16 03:19:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:23,958 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 537 transitions. [2023-02-16 03:19:23,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 537 transitions. [2023-02-16 03:19:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:19:23,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:23,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:19:23,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:19:23,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390163, now seen corresponding path program 1 times [2023-02-16 03:19:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:23,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301601379] [2023-02-16 03:19:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:23,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:24,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301601379] [2023-02-16 03:19:24,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301601379] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:24,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:24,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:19:24,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115100217] [2023-02-16 03:19:24,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:19:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:19:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:19:24,058 INFO L87 Difference]: Start difference. First operand 400 states and 537 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:24,187 INFO L93 Difference]: Finished difference Result 395 states and 532 transitions. [2023-02-16 03:19:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:19:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 03:19:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:24,189 INFO L225 Difference]: With dead ends: 395 [2023-02-16 03:19:24,189 INFO L226 Difference]: Without dead ends: 395 [2023-02-16 03:19:24,189 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 [2023-02-16 03:19:24,190 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 38 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:24,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 510 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:19:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-02-16 03:19:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2023-02-16 03:19:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 247 states have (on average 2.0404858299595143) internal successors, (504), 381 states have internal predecessors, (504), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 532 transitions. [2023-02-16 03:19:24,197 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 532 transitions. Word has length 10 [2023-02-16 03:19:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:24,197 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 532 transitions. [2023-02-16 03:19:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 532 transitions. [2023-02-16 03:19:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 03:19:24,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:24,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:19:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:19:24,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash 279357079, now seen corresponding path program 1 times [2023-02-16 03:19:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:24,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141585651] [2023-02-16 03:19:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:24,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141585651] [2023-02-16 03:19:24,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141585651] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:24,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:24,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:19:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075175208] [2023-02-16 03:19:24,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:24,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:19:24,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:19:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:19:24,317 INFO L87 Difference]: Start difference. First operand 395 states and 532 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:24,725 INFO L93 Difference]: Finished difference Result 523 states and 574 transitions. [2023-02-16 03:19:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:19:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 03:19:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:24,727 INFO L225 Difference]: With dead ends: 523 [2023-02-16 03:19:24,727 INFO L226 Difference]: Without dead ends: 523 [2023-02-16 03:19:24,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:19:24,728 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 317 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:24,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 806 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:19:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-02-16 03:19:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 387. [2023-02-16 03:19:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 247 states have (on average 2.0080971659919027) internal successors, (496), 373 states have internal predecessors, (496), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 524 transitions. [2023-02-16 03:19:24,735 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 524 transitions. Word has length 11 [2023-02-16 03:19:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:24,735 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 524 transitions. [2023-02-16 03:19:24,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 524 transitions. [2023-02-16 03:19:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 03:19:24,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:24,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:19:24,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:19:24,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:24,737 INFO L85 PathProgramCache]: Analyzing trace with hash 279357080, now seen corresponding path program 1 times [2023-02-16 03:19:24,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:24,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352139419] [2023-02-16 03:19:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:24,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352139419] [2023-02-16 03:19:24,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352139419] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:24,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:24,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 03:19:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253488456] [2023-02-16 03:19:24,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:24,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:19:24,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:19:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:19:24,885 INFO L87 Difference]: Start difference. First operand 387 states and 524 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:25,382 INFO L93 Difference]: Finished difference Result 513 states and 564 transitions. [2023-02-16 03:19:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:19:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 03:19:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:25,384 INFO L225 Difference]: With dead ends: 513 [2023-02-16 03:19:25,384 INFO L226 Difference]: Without dead ends: 513 [2023-02-16 03:19:25,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:19:25,385 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 806 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:25,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 584 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:19:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-16 03:19:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 378. [2023-02-16 03:19:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 247 states have (on average 1.9676113360323886) internal successors, (486), 364 states have internal predecessors, (486), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 03:19:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2023-02-16 03:19:25,391 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 11 [2023-02-16 03:19:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:25,391 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2023-02-16 03:19:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2023-02-16 03:19:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 03:19:25,392 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:25,392 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] [2023-02-16 03:19:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:19:25,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 693745101, now seen corresponding path program 1 times [2023-02-16 03:19:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641530718] [2023-02-16 03:19:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:25,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:25,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641530718] [2023-02-16 03:19:25,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641530718] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:25,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:25,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:19:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007071123] [2023-02-16 03:19:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:25,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:19:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:19:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:19:25,664 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:25,944 INFO L93 Difference]: Finished difference Result 398 states and 537 transitions. [2023-02-16 03:19:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:19:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 03:19:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:25,946 INFO L225 Difference]: With dead ends: 398 [2023-02-16 03:19:25,946 INFO L226 Difference]: Without dead ends: 398 [2023-02-16 03:19:25,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-16 03:19:25,946 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 32 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:25,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1568 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:19:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-02-16 03:19:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 386. [2023-02-16 03:19:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 254 states have (on average 1.9448818897637796) internal successors, (494), 371 states have internal predecessors, (494), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:19:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 524 transitions. [2023-02-16 03:19:25,955 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 524 transitions. Word has length 20 [2023-02-16 03:19:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:25,955 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 524 transitions. [2023-02-16 03:19:25,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 524 transitions. [2023-02-16 03:19:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:19:25,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:25,956 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] [2023-02-16 03:19:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:19:25,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash -964577360, now seen corresponding path program 1 times [2023-02-16 03:19:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:25,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086895016] [2023-02-16 03:19:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:26,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086895016] [2023-02-16 03:19:26,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086895016] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:19:26,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:19:26,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-16 03:19:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172262008] [2023-02-16 03:19:26,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:19:26,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 03:19:26,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:26,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 03:19:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:19:26,320 INFO L87 Difference]: Start difference. First operand 386 states and 524 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:26,898 INFO L93 Difference]: Finished difference Result 526 states and 579 transitions. [2023-02-16 03:19:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:19:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 03:19:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:26,901 INFO L225 Difference]: With dead ends: 526 [2023-02-16 03:19:26,901 INFO L226 Difference]: Without dead ends: 526 [2023-02-16 03:19:26,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:19:26,901 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 515 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:26,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1441 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:19:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-02-16 03:19:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2023-02-16 03:19:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 257 states have (on average 1.933852140077821) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:19:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2023-02-16 03:19:26,909 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 22 [2023-02-16 03:19:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:26,909 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2023-02-16 03:19:26,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:19:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2023-02-16 03:19:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:19:26,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:26,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:19:26,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 03:19:26,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -339455757, now seen corresponding path program 1 times [2023-02-16 03:19:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:26,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570531786] [2023-02-16 03:19:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:19:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:27,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:27,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570531786] [2023-02-16 03:19:27,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570531786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:19:27,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041887635] [2023-02-16 03:19:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:27,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:19:27,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:19:27,729 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) [2023-02-16 03:19:27,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:19:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-16 03:19:27,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:19:27,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:19:28,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:19:28,168 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:19:28,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-16 03:19:28,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:19:28,212 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:19:28,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2023-02-16 03:19:28,219 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:19:28,281 INFO L321 Elim1Store]: treesize reduction 78, result has 12.4 percent of original size [2023-02-16 03:19:28,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 71 [2023-02-16 03:19:28,430 INFO L321 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2023-02-16 03:19:28,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 58 [2023-02-16 03:19:28,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-16 03:19:28,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-16 03:19:28,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-16 03:19:28,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:19:28,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-02-16 03:19:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:28,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:19:33,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:33,121 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-02-16 03:19:33,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:33,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 118 [2023-02-16 03:19:33,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 78 [2023-02-16 03:19:33,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-02-16 03:19:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041887635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:19:33,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:19:33,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2023-02-16 03:19:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144998159] [2023-02-16 03:19:33,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 03:19:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:19:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:19:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:19:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=991, Unknown=17, NotChecked=0, Total=1122 [2023-02-16 03:19:33,362 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:19:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:19:35,369 INFO L93 Difference]: Finished difference Result 529 states and 581 transitions. [2023-02-16 03:19:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:19:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-16 03:19:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:19:35,371 INFO L225 Difference]: With dead ends: 529 [2023-02-16 03:19:35,371 INFO L226 Difference]: Without dead ends: 529 [2023-02-16 03:19:35,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=261, Invalid=1528, Unknown=17, NotChecked=0, Total=1806 [2023-02-16 03:19:35,381 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 1089 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:19:35,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 2789 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 03:19:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-02-16 03:19:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 394. [2023-02-16 03:19:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 262 states have (on average 1.9122137404580153) internal successors, (501), 379 states have internal predecessors, (501), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-16 03:19:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2023-02-16 03:19:35,392 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 37 [2023-02-16 03:19:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:19:35,392 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2023-02-16 03:19:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 03:19:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2023-02-16 03:19:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 03:19:35,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:19:35,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:19:35,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:19:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:19:35,602 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-02-16 03:19:35,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:19:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash -339455756, now seen corresponding path program 1 times [2023-02-16 03:19:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:19:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137805774] [2023-02-16 03:19:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:19:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:36,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:19:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:19:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137805774] [2023-02-16 03:19:36,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137805774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:19:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928236712] [2023-02-16 03:19:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:19:36,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:19:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:19:36,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:19:36,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:19:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:19:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-16 03:19:36,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:19:36,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:19:36,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-16 03:19:36,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:19:36,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-16 03:19:36,890 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:19:36,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-16 03:19:36,905 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:19:36,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-16 03:19:36,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:19:36,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-16 03:19:37,027 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:19:37,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 46 [2023-02-16 03:19:37,042 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 03:19:37,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 44 [2023-02-16 03:19:37,063 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:19:37,083 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 03:19:37,204 INFO L321 Elim1Store]: treesize reduction 78, result has 12.4 percent of original size [2023-02-16 03:19:37,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 105 [2023-02-16 03:19:37,370 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2023-02-16 03:19:37,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2023-02-16 03:19:37,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-16 03:19:37,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-16 03:19:37,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:19:37,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-16 03:19:37,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:19:37,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-02-16 03:19:37,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-16 03:19:37,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:19:37,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-02-16 03:19:37,683 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 03:19:37,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-16 03:19:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:19:37,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:19:37,778 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_511 (Array Int Int)) (v_ArrVal_510 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_511) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_510) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_511 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_511) c_append_~head.base) .cse0) 5))))) is different from false [2023-02-16 03:19:39,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:39,800 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 120 [2023-02-16 03:19:39,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 355 treesize of output 267 [2023-02-16 03:19:39,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:39,826 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 204 [2023-02-16 03:19:39,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:39,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1078 treesize of output 1042 [2023-02-16 03:19:39,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:39,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4597 treesize of output 4414 [2023-02-16 03:19:39,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4402 treesize of output 3946 [2023-02-16 03:19:39,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:19:39,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3925 treesize of output 3738 [2023-02-16 03:19:39,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3754 treesize of output 3362 [2023-02-16 03:19:39,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3345 treesize of output 2961 [2023-02-16 03:19:39,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2961 treesize of output 2953