./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/list-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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-ext-properties/list-ext_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e978ccdde62c7126e7c77a584896efdc6e7afe04b6752d127d7236cecdea192f --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 02:58:58,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 02:58:58,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 02:58:58,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 02:58:58,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 02:58:58,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 02:58:58,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 02:58:58,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 02:58:58,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 02:58:58,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 02:58:58,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 02:58:58,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 02:58:58,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 02:58:58,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 02:58:58,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 02:58:58,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 02:58:58,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 02:58:58,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 02:58:58,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 02:58:58,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 02:58:58,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 02:58:58,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 02:58:58,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 02:58:58,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 02:58:58,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 02:58:58,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 02:58:58,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 02:58:58,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 02:58:58,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 02:58:58,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 02:58:58,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 02:58:58,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 02:58:58,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 02:58:58,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 02:58:58,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 02:58:58,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 02:58:58,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 02:58:58,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 02:58:58,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 02:58:58,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 02:58:58,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 02:58:58,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 02:58:58,836 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 02:58:58,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 02:58:58,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 02:58:58,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 02:58:58,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 02:58:58,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 02:58:58,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 02:58:58,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 02:58:58,838 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 02:58:58,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 02:58:58,839 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 02:58:58,839 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 02:58:58,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 02:58:58,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 02:58:58,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 02:58:58,840 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 02:58:58,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 02:58:58,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 02:58:58,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 02:58:58,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:58:58,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 02:58:58,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 02:58:58,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 02:58:58,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 02:58:58,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 02:58:58,842 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 02:58:58,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 02:58:58,842 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 02:58:58,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e978ccdde62c7126e7c77a584896efdc6e7afe04b6752d127d7236cecdea192f [2023-02-17 02:58:59,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 02:58:59,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 02:58:59,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 02:58:59,054 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 02:58:59,054 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 02:58:59,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/list-ext_1.i [2023-02-17 02:59:00,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 02:59:00,206 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 02:59:00,206 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_1.i [2023-02-17 02:59:00,213 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b2ec0e7/b5765bd1bf904ac0a423bf4903ce752d/FLAG680ef21ec [2023-02-17 02:59:00,222 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42b2ec0e7/b5765bd1bf904ac0a423bf4903ce752d [2023-02-17 02:59:00,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 02:59:00,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 02:59:00,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 02:59:00,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 02:59:00,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 02:59:00,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33238ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00, skipping insertion in model container [2023-02-17 02:59:00,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 02:59:00,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 02:59:00,447 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-ext-properties/list-ext_1.i[23553,23566] [2023-02-17 02:59:00,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:59:00,459 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 02:59:00,489 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-ext-properties/list-ext_1.i[23553,23566] [2023-02-17 02:59:00,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 02:59:00,507 INFO L208 MainTranslator]: Completed translation [2023-02-17 02:59:00,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00 WrapperNode [2023-02-17 02:59:00,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 02:59:00,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 02:59:00,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 02:59:00,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 02:59:00,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,547 INFO L138 Inliner]: procedures = 124, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 128 [2023-02-17 02:59:00,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 02:59:00,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 02:59:00,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 02:59:00,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 02:59:00,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,596 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 02:59:00,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 02:59:00,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 02:59:00,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 02:59:00,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (1/1) ... [2023-02-17 02:59:00,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 02:59:00,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:59:00,633 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 02:59:00,634 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 02:59:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-17 02:59:00,675 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-17 02:59:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 02:59:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 02:59:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 02:59:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 02:59:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 02:59:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 02:59:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 02:59:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 02:59:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 02:59:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 02:59:00,809 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 02:59:00,810 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 02:59:00,850 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-17 02:59:01,054 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 02:59:01,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 02:59:01,059 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-17 02:59:01,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:59:01 BoogieIcfgContainer [2023-02-17 02:59:01,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 02:59:01,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 02:59:01,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 02:59:01,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 02:59:01,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 02:59:00" (1/3) ... [2023-02-17 02:59:01,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9a5ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:59:01, skipping insertion in model container [2023-02-17 02:59:01,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 02:59:00" (2/3) ... [2023-02-17 02:59:01,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9a5ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 02:59:01, skipping insertion in model container [2023-02-17 02:59:01,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 02:59:01" (3/3) ... [2023-02-17 02:59:01,080 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_1.i [2023-02-17 02:59:01,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 02:59:01,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-02-17 02:59:01,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 02:59:01,140 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;@95b0eb5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 02:59:01,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-02-17 02:59:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 91 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 02:59:01,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:01,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:01,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:01,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:01,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2098269937, now seen corresponding path program 1 times [2023-02-17 02:59:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106203476] [2023-02-17 02:59:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:01,267 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 02:59:01,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:01,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106203476] [2023-02-17 02:59:01,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106203476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:01,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:01,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 02:59:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589353633] [2023-02-17 02:59:01,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:01,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 02:59:01,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 02:59:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:59:01,293 INFO L87 Difference]: Start difference. First operand has 93 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 91 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:01,307 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2023-02-17 02:59:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 02:59:01,308 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 02:59:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:01,313 INFO L225 Difference]: With dead ends: 93 [2023-02-17 02:59:01,314 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 02:59:01,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 02:59:01,321 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:01,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:59:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 02:59:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-02-17 02:59:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2023-02-17 02:59:01,355 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 7 [2023-02-17 02:59:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:01,355 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2023-02-17 02:59:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2023-02-17 02:59:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:59:01,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:01,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:01,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 02:59:01,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash 620871786, now seen corresponding path program 1 times [2023-02-17 02:59:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:01,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709758416] [2023-02-17 02:59:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:01,465 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 02:59:01,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709758416] [2023-02-17 02:59:01,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709758416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:01,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:59:01,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442928913] [2023-02-17 02:59:01,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:59:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:59:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:59:01,469 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:01,611 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2023-02-17 02:59:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 02:59:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 02:59:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:01,613 INFO L225 Difference]: With dead ends: 107 [2023-02-17 02:59:01,613 INFO L226 Difference]: Without dead ends: 107 [2023-02-17 02:59:01,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:59:01,614 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:01,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 52 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-17 02:59:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2023-02-17 02:59:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2023-02-17 02:59:01,620 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 8 [2023-02-17 02:59:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:01,621 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2023-02-17 02:59:01,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2023-02-17 02:59:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 02:59:01,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:01,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:01,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 02:59:01,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:01,623 INFO L85 PathProgramCache]: Analyzing trace with hash 620871787, now seen corresponding path program 1 times [2023-02-17 02:59:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:01,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600251836] [2023-02-17 02:59:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:01,694 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 02:59:01,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600251836] [2023-02-17 02:59:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600251836] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:01,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:59:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099904975] [2023-02-17 02:59:01,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:59:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:59:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:59:01,697 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:01,851 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2023-02-17 02:59:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:59:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 02:59:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:01,853 INFO L225 Difference]: With dead ends: 124 [2023-02-17 02:59:01,853 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 02:59:01,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:59:01,854 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 170 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:01,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 60 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 02:59:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2023-02-17 02:59:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.5125) internal successors, (121), 106 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2023-02-17 02:59:01,861 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 8 [2023-02-17 02:59:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:01,861 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2023-02-17 02:59:01,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2023-02-17 02:59:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 02:59:01,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:01,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 02:59:01,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1332204644, now seen corresponding path program 1 times [2023-02-17 02:59:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663130828] [2023-02-17 02:59:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:02,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663130828] [2023-02-17 02:59:02,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663130828] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:02,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:02,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:59:02,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300606656] [2023-02-17 02:59:02,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:02,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:59:02,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:02,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:59:02,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:59:02,067 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:02,239 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2023-02-17 02:59:02,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:59:02,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 02:59:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:02,245 INFO L225 Difference]: With dead ends: 152 [2023-02-17 02:59:02,245 INFO L226 Difference]: Without dead ends: 152 [2023-02-17 02:59:02,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:59:02,254 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 116 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:02,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 240 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:59:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-17 02:59:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2023-02-17 02:59:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 110 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2023-02-17 02:59:02,269 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 17 [2023-02-17 02:59:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:02,269 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2023-02-17 02:59:02,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2023-02-17 02:59:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 02:59:02,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:02,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 02:59:02,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1332204645, now seen corresponding path program 1 times [2023-02-17 02:59:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:02,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345150264] [2023-02-17 02:59:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:02,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345150264] [2023-02-17 02:59:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345150264] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:02,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:02,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:59:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349927638] [2023-02-17 02:59:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:02,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:59:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:59:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:59:02,417 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:02,618 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2023-02-17 02:59:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:59:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 02:59:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:02,620 INFO L225 Difference]: With dead ends: 155 [2023-02-17 02:59:02,621 INFO L226 Difference]: Without dead ends: 155 [2023-02-17 02:59:02,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:59:02,627 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 80 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:02,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 307 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 02:59:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-17 02:59:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 95. [2023-02-17 02:59:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 94 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2023-02-17 02:59:02,643 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 17 [2023-02-17 02:59:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:02,644 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2023-02-17 02:59:02,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2023-02-17 02:59:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 02:59:02,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:02,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 02:59:02,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -808483032, now seen corresponding path program 1 times [2023-02-17 02:59:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494152235] [2023-02-17 02:59:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:02,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494152235] [2023-02-17 02:59:02,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494152235] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:02,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:02,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:59:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976775045] [2023-02-17 02:59:02,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:02,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:59:02,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:02,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:59:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:59:02,814 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:02,969 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2023-02-17 02:59:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:59:02,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-17 02:59:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:02,971 INFO L225 Difference]: With dead ends: 187 [2023-02-17 02:59:02,971 INFO L226 Difference]: Without dead ends: 187 [2023-02-17 02:59:02,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:59:02,972 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 121 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:02,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 231 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-17 02:59:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 106. [2023-02-17 02:59:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2023-02-17 02:59:02,989 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 18 [2023-02-17 02:59:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:02,990 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2023-02-17 02:59:02,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2023-02-17 02:59:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 02:59:02,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:02,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 02:59:02,992 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 389256394, now seen corresponding path program 1 times [2023-02-17 02:59:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:02,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153727738] [2023-02-17 02:59:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:03,073 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 02:59:03,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:03,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153727738] [2023-02-17 02:59:03,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153727738] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:03,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:03,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:59:03,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546051105] [2023-02-17 02:59:03,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:03,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:59:03,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:59:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:59:03,075 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:03,235 INFO L93 Difference]: Finished difference Result 199 states and 216 transitions. [2023-02-17 02:59:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:59:03,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 02:59:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:03,236 INFO L225 Difference]: With dead ends: 199 [2023-02-17 02:59:03,236 INFO L226 Difference]: Without dead ends: 199 [2023-02-17 02:59:03,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:59:03,237 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 123 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:03,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 224 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-17 02:59:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 110. [2023-02-17 02:59:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.4597701149425288) internal successors, (127), 109 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2023-02-17 02:59:03,245 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 20 [2023-02-17 02:59:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:03,246 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2023-02-17 02:59:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2023-02-17 02:59:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 02:59:03,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:03,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:03,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 02:59:03,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash 389308949, now seen corresponding path program 1 times [2023-02-17 02:59:03,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:03,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469487021] [2023-02-17 02:59:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469487021] [2023-02-17 02:59:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469487021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:03,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 02:59:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712046340] [2023-02-17 02:59:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:03,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 02:59:03,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 02:59:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-17 02:59:03,369 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:03,501 INFO L93 Difference]: Finished difference Result 183 states and 202 transitions. [2023-02-17 02:59:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:59:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 02:59:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:03,503 INFO L225 Difference]: With dead ends: 183 [2023-02-17 02:59:03,503 INFO L226 Difference]: Without dead ends: 183 [2023-02-17 02:59:03,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:59:03,503 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 115 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:03,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 236 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-17 02:59:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 110. [2023-02-17 02:59:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2023-02-17 02:59:03,506 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 20 [2023-02-17 02:59:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:03,506 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2023-02-17 02:59:03,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2023-02-17 02:59:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 02:59:03,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:03,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:03,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 02:59:03,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:03,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1064403471, now seen corresponding path program 1 times [2023-02-17 02:59:03,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:03,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5772827] [2023-02-17 02:59:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:03,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:03,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5772827] [2023-02-17 02:59:03,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5772827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:03,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:03,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:59:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82344954] [2023-02-17 02:59:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:03,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:59:03,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:59:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:59:03,583 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:03,687 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2023-02-17 02:59:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 02:59:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 02:59:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:03,688 INFO L225 Difference]: With dead ends: 122 [2023-02-17 02:59:03,688 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 02:59:03,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 02:59:03,690 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 109 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:03,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 196 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 02:59:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2023-02-17 02:59:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 107 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2023-02-17 02:59:03,692 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 20 [2023-02-17 02:59:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:03,693 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2023-02-17 02:59:03,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2023-02-17 02:59:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 02:59:03,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:03,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:03,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 02:59:03,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1064403472, now seen corresponding path program 1 times [2023-02-17 02:59:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:03,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667225467] [2023-02-17 02:59:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:03,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:03,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667225467] [2023-02-17 02:59:03,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667225467] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:03,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:03,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 02:59:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720337332] [2023-02-17 02:59:03,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:03,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 02:59:03,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 02:59:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 02:59:03,775 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:03,897 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2023-02-17 02:59:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 02:59:03,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 02:59:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:03,898 INFO L225 Difference]: With dead ends: 120 [2023-02-17 02:59:03,898 INFO L226 Difference]: Without dead ends: 120 [2023-02-17 02:59:03,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 02:59:03,899 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 72 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:03,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 250 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-17 02:59:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2023-02-17 02:59:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 92 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2023-02-17 02:59:03,901 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 20 [2023-02-17 02:59:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:03,902 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2023-02-17 02:59:03,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2023-02-17 02:59:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 02:59:03,902 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:03,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 02:59:03,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:03,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2138921840, now seen corresponding path program 1 times [2023-02-17 02:59:03,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:03,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170454118] [2023-02-17 02:59:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:03,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:03,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:03,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170454118] [2023-02-17 02:59:03,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170454118] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:03,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:03,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 02:59:03,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067276991] [2023-02-17 02:59:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:03,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 02:59:03,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 02:59:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 02:59:03,933 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:03,985 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2023-02-17 02:59:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 02:59:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 02:59:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:03,986 INFO L225 Difference]: With dead ends: 113 [2023-02-17 02:59:03,986 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 02:59:03,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:59:03,987 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:03,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 02:59:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 02:59:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2023-02-17 02:59:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.379746835443038) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2023-02-17 02:59:03,989 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 24 [2023-02-17 02:59:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:03,990 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2023-02-17 02:59:03,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2023-02-17 02:59:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 02:59:03,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:03,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:03,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 02:59:03,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1785439949, now seen corresponding path program 1 times [2023-02-17 02:59:03,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:03,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306578056] [2023-02-17 02:59:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:04,039 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 02:59:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306578056] [2023-02-17 02:59:04,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306578056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 02:59:04,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 02:59:04,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 02:59:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141295177] [2023-02-17 02:59:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 02:59:04,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 02:59:04,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 02:59:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 02:59:04,042 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:04,113 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2023-02-17 02:59:04,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 02:59:04,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-17 02:59:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:04,114 INFO L225 Difference]: With dead ends: 128 [2023-02-17 02:59:04,115 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 02:59:04,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 02:59:04,115 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 73 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:04,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 163 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 02:59:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 02:59:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2023-02-17 02:59:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2023-02-17 02:59:04,118 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 26 [2023-02-17 02:59:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:04,118 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2023-02-17 02:59:04,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2023-02-17 02:59:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 02:59:04,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:04,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:04,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 02:59:04,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:04,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1628820970, now seen corresponding path program 1 times [2023-02-17 02:59:04,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:04,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579312942] [2023-02-17 02:59:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:04,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:04,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:04,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579312942] [2023-02-17 02:59:04,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579312942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:59:04,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526018053] [2023-02-17 02:59:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:04,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:59:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:59:04,267 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 02:59:04,268 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 02:59:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 02:59:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:59:04,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 02:59:04,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:04,429 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 02:59:04,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 02:59:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 02:59:04,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-17 02:59:04,474 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 20 treesize of output 8 [2023-02-17 02:59:04,502 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 02:59:04,509 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 02:59:04,533 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 02:59:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:04,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:59:04,592 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem13#1.base| v_ArrVal_205) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) is different from false [2023-02-17 02:59:04,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:04,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 30 [2023-02-17 02:59:04,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:04,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-02-17 02:59:04,684 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 20 treesize of output 18 [2023-02-17 02:59:04,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:04,688 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 13 treesize of output 17 [2023-02-17 02:59:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:04,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526018053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 02:59:04,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 02:59:04,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2023-02-17 02:59:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588595502] [2023-02-17 02:59:04,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 02:59:04,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 02:59:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 02:59:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 02:59:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=607, Unknown=12, NotChecked=52, Total=812 [2023-02-17 02:59:04,711 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 02:59:05,408 INFO L93 Difference]: Finished difference Result 221 states and 240 transitions. [2023-02-17 02:59:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 02:59:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 02:59:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 02:59:05,409 INFO L225 Difference]: With dead ends: 221 [2023-02-17 02:59:05,410 INFO L226 Difference]: Without dead ends: 221 [2023-02-17 02:59:05,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=1404, Unknown=14, NotChecked=82, Total=1892 [2023-02-17 02:59:05,411 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 451 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 60 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 02:59:05,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 788 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1005 Invalid, 5 Unknown, 154 Unchecked, 0.5s Time] [2023-02-17 02:59:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-17 02:59:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 112. [2023-02-17 02:59:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 96 states have (on average 1.3333333333333333) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2023-02-17 02:59:05,413 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 27 [2023-02-17 02:59:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 02:59:05,413 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2023-02-17 02:59:05,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 02:59:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2023-02-17 02:59:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 02:59:05,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 02:59:05,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 02:59:05,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 02:59:05,614 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,SelfDestructingSolverStorable12 [2023-02-17 02:59:05,614 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-02-17 02:59:05,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 02:59:05,615 INFO L85 PathProgramCache]: Analyzing trace with hash 324037282, now seen corresponding path program 1 times [2023-02-17 02:59:05,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 02:59:05,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279945519] [2023-02-17 02:59:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:05,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 02:59:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:05,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 02:59:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279945519] [2023-02-17 02:59:05,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279945519] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 02:59:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488725335] [2023-02-17 02:59:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 02:59:05,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 02:59:05,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 02:59:05,845 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 02:59:05,848 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 02:59:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 02:59:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 02:59:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 02:59:05,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:05,932 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 02:59:05,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 02:59:06,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:06,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 76 [2023-02-17 02:59:06,012 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 52 treesize of output 32 [2023-02-17 02:59:06,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:06,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 76 [2023-02-17 02:59:06,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:06,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 79 [2023-02-17 02:59:06,071 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 25 treesize of output 13 [2023-02-17 02:59:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 02:59:06,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 02:59:06,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:06,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-02-17 02:59:06,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:06,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-02-17 02:59:06,186 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 9 treesize of output 5 [2023-02-17 02:59:06,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 02:59:06,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 194 treesize of output 1000