./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_append_equal.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 208d04089fa2c50848123d29dd18b6b2021c1b591464bd422fd10955aaeec7fc --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:48:28,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:48:28,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:48:28,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:48:28,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:48:28,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:48:28,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:48:28,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:48:28,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:48:28,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:48:28,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:48:28,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:48:28,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:48:28,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:48:28,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:48:28,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:48:28,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:48:28,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:48:28,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:48:28,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:48:28,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:48:28,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:48:28,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:48:28,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:48:28,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:48:28,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:48:28,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:48:28,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:48:28,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:48:28,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:48:28,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:48:28,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:48:28,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:48:28,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:48:28,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:48:28,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:48:28,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:48:28,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:48:28,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:48:28,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:48:28,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:48:28,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:48:28,902 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:48:28,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:48:28,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:48:28,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:48:28,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:48:28,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:48:28,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:48:28,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:48:28,907 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:48:28,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:48:28,908 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:48:28,908 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:48:28,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:48:28,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:48:28,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:48:28,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:48:28,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:48:28,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:48:28,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:48:28,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:48:28,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:48:28,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:48:28,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:48:28,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:48:28,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:48:28,911 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:48:28,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:48:28,911 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:48:28,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 208d04089fa2c50848123d29dd18b6b2021c1b591464bd422fd10955aaeec7fc [2023-02-17 08:48:29,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:48:29,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:48:29,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:48:29,151 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:48:29,151 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:48:29,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2023-02-17 08:48:30,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:48:30,301 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:48:30,301 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2023-02-17 08:48:30,313 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157a29f2a/f825f2c913d942e7b7856dd072aa5be9/FLAGfc9af4680 [2023-02-17 08:48:30,332 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157a29f2a/f825f2c913d942e7b7856dd072aa5be9 [2023-02-17 08:48:30,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:48:30,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:48:30,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:48:30,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:48:30,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:48:30,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81837e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30, skipping insertion in model container [2023-02-17 08:48:30,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:48:30,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:48:30,609 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2023-02-17 08:48:30,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:48:30,619 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:48:30,657 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2023-02-17 08:48:30,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:48:30,708 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:48:30,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30 WrapperNode [2023-02-17 08:48:30,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:48:30,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:48:30,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:48:30,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:48:30,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,801 INFO L138 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2023-02-17 08:48:30,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:48:30,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:48:30,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:48:30,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:48:30,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,866 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:48:30,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:48:30,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:48:30,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:48:30,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (1/1) ... [2023-02-17 08:48:30,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:48:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:30,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 08:48:30,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 08:48:30,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 08:48:30,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 08:48:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-17 08:48:30,949 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-17 08:48:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:48:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 08:48:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 08:48:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 08:48:30,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 08:48:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:48:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 08:48:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 08:48:30,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:48:30,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:48:31,086 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:48:31,087 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:48:31,362 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:48:31,378 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:48:31,379 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 08:48:31,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:48:31 BoogieIcfgContainer [2023-02-17 08:48:31,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:48:31,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:48:31,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:48:31,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:48:31,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:48:30" (1/3) ... [2023-02-17 08:48:31,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2aa4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:48:31, skipping insertion in model container [2023-02-17 08:48:31,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:48:30" (2/3) ... [2023-02-17 08:48:31,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2aa4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:48:31, skipping insertion in model container [2023-02-17 08:48:31,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:48:31" (3/3) ... [2023-02-17 08:48:31,389 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2023-02-17 08:48:31,401 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:48:31,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2023-02-17 08:48:31,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:48:31,457 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;@217b8053, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:48:31,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-02-17 08:48:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 66 states have (on average 2.090909090909091) internal successors, (138), 126 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:48:31,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:31,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:48:31,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash 895333938, now seen corresponding path program 1 times [2023-02-17 08:48:31,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:31,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973036109] [2023-02-17 08:48:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:31,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:48:31,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:31,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973036109] [2023-02-17 08:48:31,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973036109] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:31,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:31,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:48:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368536993] [2023-02-17 08:48:31,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:31,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:48:31,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:48:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:48:31,753 INFO L87 Difference]: Start difference. First operand has 131 states, 66 states have (on average 2.090909090909091) internal successors, (138), 126 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:48:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:31,876 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2023-02-17 08:48:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:48:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-02-17 08:48:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:31,885 INFO L225 Difference]: With dead ends: 128 [2023-02-17 08:48:31,885 INFO L226 Difference]: Without dead ends: 125 [2023-02-17 08:48:31,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:48:31,892 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:31,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-17 08:48:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-17 08:48:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 64 states have (on average 1.984375) internal successors, (127), 120 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2023-02-17 08:48:31,932 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 6 [2023-02-17 08:48:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:31,932 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2023-02-17 08:48:31,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:48:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2023-02-17 08:48:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:48:31,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:31,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:48:31,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:48:31,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash 895333939, now seen corresponding path program 1 times [2023-02-17 08:48:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:31,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317659127] [2023-02-17 08:48:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:48:32,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317659127] [2023-02-17 08:48:32,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317659127] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:32,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:32,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:48:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12511120] [2023-02-17 08:48:32,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:32,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:48:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:48:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:48:32,055 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:48:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:32,182 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2023-02-17 08:48:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:48:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-02-17 08:48:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:32,184 INFO L225 Difference]: With dead ends: 122 [2023-02-17 08:48:32,185 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 08:48:32,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:48:32,186 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 5 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:32,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 197 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 08:48:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-02-17 08:48:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2023-02-17 08:48:32,200 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 6 [2023-02-17 08:48:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:32,200 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2023-02-17 08:48:32,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-02-17 08:48:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2023-02-17 08:48:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 08:48:32,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:32,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:48:32,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1787864811, now seen corresponding path program 1 times [2023-02-17 08:48:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:32,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608623026] [2023-02-17 08:48:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:32,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:48:32,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:32,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608623026] [2023-02-17 08:48:32,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608623026] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:32,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:32,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:48:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461409121] [2023-02-17 08:48:32,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:32,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:48:32,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:48:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:48:32,310 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:48:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:32,406 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2023-02-17 08:48:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:48:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-17 08:48:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:32,408 INFO L225 Difference]: With dead ends: 133 [2023-02-17 08:48:32,408 INFO L226 Difference]: Without dead ends: 133 [2023-02-17 08:48:32,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:48:32,409 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 295 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-17 08:48:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2023-02-17 08:48:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 118 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2023-02-17 08:48:32,416 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 14 [2023-02-17 08:48:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:32,417 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2023-02-17 08:48:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:48:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2023-02-17 08:48:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 08:48:32,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:32,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:48:32,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1282134272, now seen corresponding path program 1 times [2023-02-17 08:48:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:32,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362366562] [2023-02-17 08:48:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:48:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362366562] [2023-02-17 08:48:32,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362366562] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:32,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:32,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:48:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329888861] [2023-02-17 08:48:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:32,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:48:32,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:48:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:48:32,530 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:32,703 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2023-02-17 08:48:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-17 08:48:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:32,707 INFO L225 Difference]: With dead ends: 123 [2023-02-17 08:48:32,708 INFO L226 Difference]: Without dead ends: 123 [2023-02-17 08:48:32,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:32,714 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 21 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:32,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 400 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:48:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-17 08:48:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2023-02-17 08:48:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 65 states have (on average 1.9076923076923078) internal successors, (124), 117 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2023-02-17 08:48:32,728 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 24 [2023-02-17 08:48:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:32,728 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2023-02-17 08:48:32,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2023-02-17 08:48:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 08:48:32,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:32,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:32,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:48:32,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1282134271, now seen corresponding path program 1 times [2023-02-17 08:48:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:32,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693000571] [2023-02-17 08:48:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693000571] [2023-02-17 08:48:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693000571] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:32,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:32,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:48:32,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236915827] [2023-02-17 08:48:32,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:48:32,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:48:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:48:32,934 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:33,117 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2023-02-17 08:48:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-17 08:48:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:33,118 INFO L225 Difference]: With dead ends: 122 [2023-02-17 08:48:33,118 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 08:48:33,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:33,119 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 19 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:33,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 424 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:48:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 08:48:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2023-02-17 08:48:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 116 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2023-02-17 08:48:33,123 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 24 [2023-02-17 08:48:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:33,123 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2023-02-17 08:48:33,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2023-02-17 08:48:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 08:48:33,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:33,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:48:33,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 524578273, now seen corresponding path program 1 times [2023-02-17 08:48:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467546376] [2023-02-17 08:48:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:33,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:33,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:33,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:33,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:33,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467546376] [2023-02-17 08:48:33,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467546376] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707778662] [2023-02-17 08:48:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:33,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:33,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:48:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:33,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 08:48:33,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:33,510 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 [2023-02-17 08:48:33,532 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_352 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_352))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 08:48:33,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:33,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 08:48:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-17 08:48:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:33,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707778662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:33,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:48:33,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-02-17 08:48:33,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473403901] [2023-02-17 08:48:33,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:33,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:48:33,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:48:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-02-17 08:48:33,594 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:33,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:33,875 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2023-02-17 08:48:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:33,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-02-17 08:48:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:33,877 INFO L225 Difference]: With dead ends: 146 [2023-02-17 08:48:33,877 INFO L226 Difference]: Without dead ends: 146 [2023-02-17 08:48:33,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-17 08:48:33,878 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 99 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:33,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 379 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 423 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2023-02-17 08:48:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-17 08:48:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 126. [2023-02-17 08:48:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 120 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2023-02-17 08:48:33,894 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 26 [2023-02-17 08:48:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:33,894 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2023-02-17 08:48:33,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2023-02-17 08:48:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 08:48:33,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:33,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:33,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:34,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 08:48:34,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash 524578274, now seen corresponding path program 1 times [2023-02-17 08:48:34,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813231662] [2023-02-17 08:48:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:34,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:34,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:34,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813231662] [2023-02-17 08:48:34,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813231662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367084347] [2023-02-17 08:48:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:34,444 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) [2023-02-17 08:48:34,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 08:48:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 08:48:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:34,545 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 [2023-02-17 08:48:34,547 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 [2023-02-17 08:48:34,598 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_494 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_494))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 08:48:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:34,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 08:48:34,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:34,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:48:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-02-17 08:48:34,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:34,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367084347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:34,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:48:34,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 13 [2023-02-17 08:48:34,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239869762] [2023-02-17 08:48:34,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:34,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:48:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:34,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:48:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-02-17 08:48:34,676 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:34,925 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2023-02-17 08:48:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:48:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-02-17 08:48:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:34,928 INFO L225 Difference]: With dead ends: 128 [2023-02-17 08:48:34,928 INFO L226 Difference]: Without dead ends: 128 [2023-02-17 08:48:34,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-02-17 08:48:34,929 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 10 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:34,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 486 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 414 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2023-02-17 08:48:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-17 08:48:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2023-02-17 08:48:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 69 states have (on average 1.855072463768116) internal successors, (128), 120 states have internal predecessors, (128), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2023-02-17 08:48:34,931 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 26 [2023-02-17 08:48:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:34,932 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2023-02-17 08:48:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2023-02-17 08:48:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 08:48:34,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:34,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:34,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:35,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-17 08:48:35,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1608700855, now seen corresponding path program 1 times [2023-02-17 08:48:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497556179] [2023-02-17 08:48:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497556179] [2023-02-17 08:48:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497556179] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308055169] [2023-02-17 08:48:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:35,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:35,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:35,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 08:48:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:48:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:35,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308055169] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:48:35,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:48:35,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-02-17 08:48:35,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150760532] [2023-02-17 08:48:35,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:35,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:48:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:35,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:48:35,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:48:35,404 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:48:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:35,512 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2023-02-17 08:48:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 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 28 [2023-02-17 08:48:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:35,513 INFO L225 Difference]: With dead ends: 127 [2023-02-17 08:48:35,513 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 08:48:35,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:35,514 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 4 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:35,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 618 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 08:48:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2023-02-17 08:48:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 69 states have (on average 1.8405797101449275) internal successors, (127), 120 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2023-02-17 08:48:35,517 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 28 [2023-02-17 08:48:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:35,517 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2023-02-17 08:48:35,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:48:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2023-02-17 08:48:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 08:48:35,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:35,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:35,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:35,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:35,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1674661710, now seen corresponding path program 1 times [2023-02-17 08:48:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:35,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339532468] [2023-02-17 08:48:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:35,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 08:48:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339532468] [2023-02-17 08:48:35,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339532468] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131444318] [2023-02-17 08:48:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:35,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:35,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 08:48:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 08:48:35,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 08:48:35,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:35,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:35,939 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 12 treesize of output 16 [2023-02-17 08:48:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 08:48:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131444318] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:48:35,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:48:35,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2023-02-17 08:48:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869914076] [2023-02-17 08:48:35,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:48:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:48:35,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:48:35,944 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:36,091 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2023-02-17 08:48:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:36,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-17 08:48:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:36,092 INFO L225 Difference]: With dead ends: 131 [2023-02-17 08:48:36,092 INFO L226 Difference]: Without dead ends: 131 [2023-02-17 08:48:36,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:36,093 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 11 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:36,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 403 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-17 08:48:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-02-17 08:48:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.8333333333333333) internal successors, (132), 123 states have internal predecessors, (132), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2023-02-17 08:48:36,096 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 29 [2023-02-17 08:48:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:36,096 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2023-02-17 08:48:36,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2023-02-17 08:48:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 08:48:36,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:36,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:36,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:36,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:36,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:36,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1674661709, now seen corresponding path program 1 times [2023-02-17 08:48:36,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:36,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404156000] [2023-02-17 08:48:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:36,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:36,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404156000] [2023-02-17 08:48:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404156000] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949383123] [2023-02-17 08:48:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:36,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:36,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:36,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 08:48:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:36,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 08:48:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:36,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:36,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:36,630 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 22 treesize of output 26 [2023-02-17 08:48:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:36,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949383123] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:48:36,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:48:36,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2023-02-17 08:48:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103055575] [2023-02-17 08:48:36,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:36,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 08:48:36,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 08:48:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:48:36,678 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 08:48:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:36,896 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2023-02-17 08:48:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:48:36,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-02-17 08:48:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:36,897 INFO L225 Difference]: With dead ends: 136 [2023-02-17 08:48:36,897 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 08:48:36,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-02-17 08:48:36,897 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 18 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:36,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1166 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:48:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 08:48:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2023-02-17 08:48:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.8194444444444444) internal successors, (131), 123 states have internal predecessors, (131), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2023-02-17 08:48:36,900 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 29 [2023-02-17 08:48:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:36,900 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2023-02-17 08:48:36,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 08:48:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2023-02-17 08:48:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 08:48:36,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:36,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:36,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 08:48:37,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 08:48:37,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -374905453, now seen corresponding path program 1 times [2023-02-17 08:48:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:37,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780376299] [2023-02-17 08:48:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:48:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780376299] [2023-02-17 08:48:37,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780376299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:37,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:37,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:48:37,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379306893] [2023-02-17 08:48:37,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:37,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:48:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:48:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:37,200 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:37,472 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2023-02-17 08:48:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:48:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-02-17 08:48:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:37,473 INFO L225 Difference]: With dead ends: 129 [2023-02-17 08:48:37,473 INFO L226 Difference]: Without dead ends: 129 [2023-02-17 08:48:37,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:48:37,474 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 24 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:37,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 445 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:48:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-17 08:48:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-02-17 08:48:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 122 states have internal predecessors, (130), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2023-02-17 08:48:37,477 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 30 [2023-02-17 08:48:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:37,477 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2023-02-17 08:48:37,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2023-02-17 08:48:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 08:48:37,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:37,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:37,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 08:48:37,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash -374905452, now seen corresponding path program 1 times [2023-02-17 08:48:37,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:37,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124569936] [2023-02-17 08:48:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:37,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:48:37,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:37,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124569936] [2023-02-17 08:48:37,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124569936] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:37,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:37,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:48:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273424463] [2023-02-17 08:48:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:37,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:48:37,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:48:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:37,617 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:37,802 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2023-02-17 08:48:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:48:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-02-17 08:48:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:37,804 INFO L225 Difference]: With dead ends: 127 [2023-02-17 08:48:37,804 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 08:48:37,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:48:37,804 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 20 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:37,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 475 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:48:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 08:48:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-17 08:48:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 72 states have (on average 1.7916666666666667) internal successors, (129), 121 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 08:48:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2023-02-17 08:48:37,807 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 30 [2023-02-17 08:48:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:37,807 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2023-02-17 08:48:37,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:48:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2023-02-17 08:48:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 08:48:37,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:37,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 08:48:37,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -688454360, now seen corresponding path program 1 times [2023-02-17 08:48:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:37,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364758109] [2023-02-17 08:48:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:37,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 08:48:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 08:48:37,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:37,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364758109] [2023-02-17 08:48:37,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364758109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:37,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467205536] [2023-02-17 08:48:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:37,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:37,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:37,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:37,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 08:48:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 08:48:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 08:48:38,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:48:38,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467205536] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:38,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:48:38,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-17 08:48:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526206477] [2023-02-17 08:48:38,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:48:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:48:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:48:38,064 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:38,073 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2023-02-17 08:48:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:48:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-02-17 08:48:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:38,074 INFO L225 Difference]: With dead ends: 115 [2023-02-17 08:48:38,074 INFO L226 Difference]: Without dead ends: 115 [2023-02-17 08:48:38,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:48:38,074 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 198 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:38,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 134 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:48:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-17 08:48:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-17 08:48:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.7692307692307692) internal successors, (115), 110 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 121 transitions. [2023-02-17 08:48:38,077 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 121 transitions. Word has length 41 [2023-02-17 08:48:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:38,077 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 121 transitions. [2023-02-17 08:48:38,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 08:48:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 121 transitions. [2023-02-17 08:48:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 08:48:38,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:38,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:38,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:38,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:38,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1191008248, now seen corresponding path program 1 times [2023-02-17 08:48:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:38,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907945149] [2023-02-17 08:48:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:38,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:38,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 08:48:38,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:38,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907945149] [2023-02-17 08:48:38,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907945149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:38,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938205124] [2023-02-17 08:48:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:38,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:38,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:38,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 08:48:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 08:48:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:38,729 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 [2023-02-17 08:48:38,734 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 11 treesize of output 7 [2023-02-17 08:48:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:38,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-02-17 08:48:38,778 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-02-17 08:48:38,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:38,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 28 [2023-02-17 08:48:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:38,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:38,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 50 [2023-02-17 08:48:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 14 not checked. [2023-02-17 08:48:38,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:38,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938205124] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:38,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:48:38,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-02-17 08:48:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640883362] [2023-02-17 08:48:38,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:38,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 08:48:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:38,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 08:48:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=280, Unknown=1, NotChecked=34, Total=380 [2023-02-17 08:48:38,940 INFO L87 Difference]: Start difference. First operand 115 states and 121 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:39,242 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2023-02-17 08:48:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:48:39,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2023-02-17 08:48:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:39,243 INFO L225 Difference]: With dead ends: 125 [2023-02-17 08:48:39,243 INFO L226 Difference]: Without dead ends: 125 [2023-02-17 08:48:39,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=487, Unknown=1, NotChecked=46, Total=650 [2023-02-17 08:48:39,244 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 346 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:39,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 308 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 450 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2023-02-17 08:48:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-17 08:48:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2023-02-17 08:48:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 65 states have (on average 1.646153846153846) internal successors, (107), 102 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2023-02-17 08:48:39,246 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 43 [2023-02-17 08:48:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:39,246 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2023-02-17 08:48:39,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2023-02-17 08:48:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 08:48:39,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:39,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:39,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:39,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:39,453 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1191008247, now seen corresponding path program 1 times [2023-02-17 08:48:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:39,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371231875] [2023-02-17 08:48:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:39,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:39,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:39,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:48:39,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371231875] [2023-02-17 08:48:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371231875] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525666253] [2023-02-17 08:48:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:39,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:39,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:39,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:39,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 08:48:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 08:48:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:40,125 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 [2023-02-17 08:48:40,135 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 5 treesize of output 3 [2023-02-17 08:48:40,145 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1821 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1821))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-17 08:48:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:40,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-02-17 08:48:40,160 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 5 treesize of output 3 [2023-02-17 08:48:40,163 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1822 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1822))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-17 08:48:40,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:40,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-02-17 08:48:40,188 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 5 treesize of output 3 [2023-02-17 08:48:40,191 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1823 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1823))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2023-02-17 08:48:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:40,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-02-17 08:48:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2023-02-17 08:48:40,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:40,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525666253] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:40,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:48:40,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-02-17 08:48:40,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338075359] [2023-02-17 08:48:40,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:40,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 08:48:40,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 08:48:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=287, Unknown=3, NotChecked=108, Total=462 [2023-02-17 08:48:40,262 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 20 states, 17 states have (on average 4.294117647058823) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:40,514 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2023-02-17 08:48:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:48:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.294117647058823) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2023-02-17 08:48:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:40,515 INFO L225 Difference]: With dead ends: 117 [2023-02-17 08:48:40,515 INFO L226 Difference]: Without dead ends: 117 [2023-02-17 08:48:40,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=451, Unknown=3, NotChecked=138, Total=702 [2023-02-17 08:48:40,516 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 568 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:40,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 167 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 315 Invalid, 0 Unknown, 294 Unchecked, 0.2s Time] [2023-02-17 08:48:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-17 08:48:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2023-02-17 08:48:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.523076923076923) internal successors, (99), 94 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2023-02-17 08:48:40,518 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 43 [2023-02-17 08:48:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:40,518 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2023-02-17 08:48:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.294117647058823) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2023-02-17 08:48:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 08:48:40,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:40,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:40,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:40,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 08:48:40,726 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2097625015, now seen corresponding path program 1 times [2023-02-17 08:48:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:40,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245694066] [2023-02-17 08:48:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:40,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 08:48:40,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:40,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245694066] [2023-02-17 08:48:40,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245694066] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:40,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:40,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:48:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339610969] [2023-02-17 08:48:40,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:40,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:48:40,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:48:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:48:40,834 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 08:48:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:40,966 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2023-02-17 08:48:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-17 08:48:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:40,967 INFO L225 Difference]: With dead ends: 113 [2023-02-17 08:48:40,967 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 08:48:40,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:40,968 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 70 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:40,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 264 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 08:48:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2023-02-17 08:48:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2023-02-17 08:48:40,971 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 45 [2023-02-17 08:48:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:40,972 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2023-02-17 08:48:40,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 08:48:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2023-02-17 08:48:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 08:48:40,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:40,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:40,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 08:48:40,974 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2097625014, now seen corresponding path program 1 times [2023-02-17 08:48:40,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:40,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917077944] [2023-02-17 08:48:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:40,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 08:48:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:41,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917077944] [2023-02-17 08:48:41,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917077944] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:48:41,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:48:41,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:48:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704003794] [2023-02-17 08:48:41,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:48:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:48:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:48:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:48:41,133 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 08:48:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:41,242 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2023-02-17 08:48:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:48:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-17 08:48:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:41,243 INFO L225 Difference]: With dead ends: 91 [2023-02-17 08:48:41,243 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 08:48:41,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:48:41,244 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 69 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:41,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 275 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:48:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 08:48:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-17 08:48:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.4) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2023-02-17 08:48:41,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 45 [2023-02-17 08:48:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:41,246 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2023-02-17 08:48:41,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 08:48:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2023-02-17 08:48:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 08:48:41,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:41,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 08:48:41,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash -601855080, now seen corresponding path program 1 times [2023-02-17 08:48:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:41,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084586193] [2023-02-17 08:48:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 08:48:41,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084586193] [2023-02-17 08:48:41,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084586193] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544247007] [2023-02-17 08:48:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:41,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:41,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:41,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 08:48:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 08:48:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:41,890 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 [2023-02-17 08:48:41,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-17 08:48:42,042 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2355 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2355))))) is different from true [2023-02-17 08:48:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:42,053 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 16 treesize of output 18 [2023-02-17 08:48:42,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:42,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 [2023-02-17 08:48:42,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 60 [2023-02-17 08:48:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-17 08:48:42,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:42,124 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2361 (Array Int Int)) (|v_node_create_~temp~0#1.base_52| Int)) (or (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_52| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_52| v_ArrVal_2361) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_52| |c_#StackHeapBarrier|)))) is different from false [2023-02-17 08:48:42,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544247007] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:42,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:48:42,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2023-02-17 08:48:42,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077508986] [2023-02-17 08:48:42,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:42,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 08:48:42,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 08:48:42,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=573, Unknown=3, NotChecked=98, Total=756 [2023-02-17 08:48:42,126 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:42,668 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2023-02-17 08:48:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 08:48:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-02-17 08:48:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:42,669 INFO L225 Difference]: With dead ends: 108 [2023-02-17 08:48:42,669 INFO L226 Difference]: Without dead ends: 108 [2023-02-17 08:48:42,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=952, Unknown=5, NotChecked=130, Total=1260 [2023-02-17 08:48:42,670 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 407 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:42,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 605 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 853 Invalid, 3 Unknown, 93 Unchecked, 0.4s Time] [2023-02-17 08:48:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-17 08:48:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2023-02-17 08:48:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 85 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2023-02-17 08:48:42,672 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 46 [2023-02-17 08:48:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:42,672 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2023-02-17 08:48:42,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2023-02-17 08:48:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 08:48:42,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:42,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:42,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:42,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 08:48:42,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -601855079, now seen corresponding path program 1 times [2023-02-17 08:48:42,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:42,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838739289] [2023-02-17 08:48:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:42,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:43,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:48:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838739289] [2023-02-17 08:48:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838739289] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583512590] [2023-02-17 08:48:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:43,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:43,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:43,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 08:48:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-17 08:48:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:43,641 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 [2023-02-17 08:48:43,643 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 [2023-02-17 08:48:43,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-02-17 08:48:43,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-17 08:48:43,883 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2596 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2596))) (exists ((v_ArrVal_2601 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2601))) (exists ((v_ArrVal_2602 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2602))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 08:48:43,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:43,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 08:48:43,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:43,898 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 25 treesize of output 25 [2023-02-17 08:48:43,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:43,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2023-02-17 08:48:43,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:43,903 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 15 treesize of output 19 [2023-02-17 08:48:43,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-17 08:48:43,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 08:48:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-02-17 08:48:43,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:48:44,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583512590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:44,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:48:44,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-02-17 08:48:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001317306] [2023-02-17 08:48:44,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:48:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 08:48:44,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:48:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 08:48:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=835, Unknown=2, NotChecked=58, Total=992 [2023-02-17 08:48:44,036 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:48:44,788 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2023-02-17 08:48:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 08:48:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-02-17 08:48:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:48:44,789 INFO L225 Difference]: With dead ends: 89 [2023-02-17 08:48:44,789 INFO L226 Difference]: Without dead ends: 89 [2023-02-17 08:48:44,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=1437, Unknown=5, NotChecked=78, Total=1722 [2023-02-17 08:48:44,790 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 301 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 08:48:44,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 648 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 856 Invalid, 3 Unknown, 92 Unchecked, 0.6s Time] [2023-02-17 08:48:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-17 08:48:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-17 08:48:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 84 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 08:48:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-02-17 08:48:44,792 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 46 [2023-02-17 08:48:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:48:44,792 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-02-17 08:48:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:48:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-02-17 08:48:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 08:48:44,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:48:44,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:48:44,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 08:48:44,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:44,993 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-02-17 08:48:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:48:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1437854233, now seen corresponding path program 1 times [2023-02-17 08:48:44,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:48:44,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379039581] [2023-02-17 08:48:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:48:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:45,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:48:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:45,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 08:48:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:45,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 08:48:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:48:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:48:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379039581] [2023-02-17 08:48:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379039581] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:48:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566094479] [2023-02-17 08:48:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:48:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:48:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:48:45,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:48:45,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 08:48:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:48:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-17 08:48:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:48:45,935 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 [2023-02-17 08:48:46,054 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 [2023-02-17 08:48:46,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:46,135 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 14 [2023-02-17 08:48:46,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-17 08:48:46,225 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2857 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2857))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2856 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2856))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-17 08:48:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:46,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 08:48:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:48:46,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:46,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 59 [2023-02-17 08:48:46,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:46,245 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 30 treesize of output 125 [2023-02-17 08:48:46,250 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 08:48:46,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 08:48:46,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:48:46,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 33 select indices, 33 select index equivalence classes, 0 disjoint index pairs (out of 528 index pairs), introduced 45 new quantified variables, introduced 528 case distinctions, treesize of input 1093 treesize of output 5043